FOOD TECHNOLOGY SERVICE INC
SC 13D/A, 2000-04-07
BUSINESS SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13D/A

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*


                          Food Technology Service, Inc.
                           (formerly Vindicator, Inc.)
- -------------------------------------------------------------------------------
                                (Name of Issuer)

                         Common Shares, $0.01 Par Value
- -------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    927341107
- -------------------------------------------------------------------------------
                                 (CUSIP Number)

                              David Nicholds, Esq.
                                MDS Nordion Inc.
                                 447 March Road
                         Kanata, Ontario, Canada K2K 1X8
                                 (613) 592-2790
- -------------------------------------------------------------------------------
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                 March 31, 2000
- -------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


         If the filing person has previously filed a statement on Schedule 13G
to report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the
following box [ ].

         *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

         The information required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).



<PAGE>


         1.       Name of Reporting Person:  MDS Nordion Inc. (formerly Nordion
International Inc.)

         2.       Check the Appropriate Box if a Member of a Group: (a) [ ]

                                                                    (b) [ ]

         3.       SEC Use Only

         4.       Source of Funds:  WC & Affiliate

         5.       Check box if Disclosure of Legal Proceedings is Required
                  Pursuant to Items 2(d) or 2(e): [ ]

         6.       Citizenship or Place of Organization: Ontario, Canada

         Number of         7.       Sole Voting Power:
          Shares
        Beneficially       8.       Shared Voting Power:  6,232,992
         Owned By
           Each            9.       Sole Dispositive Power:
         Reporting
        Person With        10.      Shared Dispositive Power:  6,232,992

         11.      Aggregate Amount Beneficially Owned by Each Reporting Person:

                  6,232,992

         12.      Check box if the Aggregate Amount in Row (11) Excludes Certain
                  Shares:  [ ]

         13.      Percent of Class Represented by Amount in Row (11):  56.1 %

         14.      Type of Reporting Person:  CO



<PAGE>


         1.       Name of Reporting Person:  MDS Inc.

         2.       Check the Appropriate Box if a Member of a Group:  (a) [ ]

                                                                     (b) [x]

         3.       SEC Use Only

         4.       Source of Funds:  WC & Affiliate

         5.       Check box if Disclosure of Legal Proceedings is Required
                  Pursuant to Items 2(d) or 2(e): [ ]

         6.       Citizenship or Place of Organization:  Ontario, Canada

         Number of         7.       Sole Voting Power:
          Shares
        Beneficially       8.       Shared Voting Power:  6,232,992
         Owned By
           Each            9.       Sole Dispositive Power:
         Reporting
        Person with        10.      Shared Dispositive Power:  6,232,992

         11.      Aggregate Amount Beneficially Owned by Each Reporting Person:

                  6,232,992

         12.      Check box if the Aggregate Amount in Row (11) Excludes Certain
                  Shares:  [ ]

         13.      Percent of Class Represented by Amount in Row (11):  56.1%

         14.      Type of Reporting Person:  CO



<PAGE>


         1.       Name of Reporting Person:  Laboratoires MDS Quebec Ltee.

         2.       Check the Appropriate Box if a Member of a Group:  (a)  [ ]

                                                                     (b)  [x]

         3.       SEC Use Only

         4.       Source of Funds: Affiliate

         5.       Check box if Disclosure of Legal Proceedings is Required
                  Pursuant to Items 2(d) or 2(e):  [ ]

         6.       Citizenship or Place of Organization:  Quebec, Canada

         Number of         7.       Sole Voting Power:
          Shares
        Beneficially       8.       Shared Voting Power:  6,232,992
         Owned By
           Each            9.       Sole Dispositive Power:
         Reporting
        Person With        10.      Shared Dispositive Power:  6,232,992

         11.      Aggregate Amount Beneficially Owned by Each Reporting Person:

                  6,232,992

         12.      Check box if the Aggregate Amount in Row (11) Excludes Certain
                  Shares:  [ ]

         13.      Percent of Class Represented by Amount in Row (11):  56.1%

         14.      Type of Reporting Person:  CO



<PAGE>


          Pursuant to Rule 13d-2(a) of Regulation 13D-G of the General Rules and
Regulations under the Securities Exchange Act of 1934, as amended (the "Act"),
MDS Nordion Inc. ("Nordion") hereby amends and restates its statement on
Schedule 13D dated December 1, 1992, as amended by Amendment No. 1 dated
February 9, 1996, Amendment No. 2 dated December 9, 1996, and Amendment No. 3
dated December 31, 1997 (the "Schedule 13D"), relating to the shares of Common
Stock, $0.01 par value (the "Stock"), of Food Technology Services, Inc. (the
"Issuer"). Unless otherwise indicated, all defined terms used herein shall have
the same meanings respectively ascribed to them in the Schedule 13D.

Item 1.   SECURITY AND ISSUER.

          (a)  Shares of Common Stock, $0.01 par value

          (b)  Food Technology Service, Inc.
               502 Prairie Mine Road
               Mulberry, Florida 33860 U.S.A.


Item 2.   IDENTITY AND BACKGROUND.

          Item 2 is hereby amended and restated in its entirety as follows:

          (a)-(c) This Schedule 13D Statement is being filed by Nordion.

          Nordion is a corporation incorporated under the Canada Business
Corporation Act with its registered office in Ontario, the principal business of
which is the manufacture and supply of radioisotopes, irradiation equipment,
radiopharmaceuticals and treatment planning systems in the field of health and
life sciences. The principal business address of Nordion is 447 March Road,
Kanata, Ontario, Canada K2K 1X8.


          The name, residence or business address, and present principal
occupation or employment of each director and executive officer of Nordion are
as follows:

<TABLE>
<CAPTION>
                                     Residence or                 Principal Occupation or
    Name                           Business Address                       Employment
- ----------------        -------------------------------          ------------------------------

<S>                     <C>                                      <C>
John A. Morrison        67 North Drive,                          Director and President & Chief
                        Toronto, Ontario M9A 4R1                 Executive Officer
                        Canada

John A. Rogers          7 Edenbridge Drive,                      Director and Chairman
                        Toronto, Ontario M9A 3E8
                        Canada

Edward K. Rygiel        46 Woodlawn Avenue West,                 Director
                        Toronto, Ontario M4V 1G7
                        Canada

John T. Corley          24 Kippewa Drive,                        Senior Vice-President, Industrial
                        Ottawa, Ontario K1S 3G4                  Irradiation
                        Canada

David J.R. Evans        137 Pineridge Road                       Senior Vice-President, Business
                        RR3                                      Development
                        Carp, Ontario K0A 1L0
                        Canada

Ken P. Johnson          8 Garand Place,                          Senior-Vice President,
                        Ottawa, Ontario                          Therapy Systems
                        Canada

Iain C. Trevena         206 Patterson Ave.,                      Senior Vice-President,
                        Ottawa, Ontario K1S 1Y6                  Nuclear Medicine
                        Canada

David L. Nicholds       12 Rosenfeld Crescent,                   Vice-President, General Counsel and
                        Kanata, Ontario K2K 2L3                  Corporate Secretary
                        Canada

Michael W. Thomas       54 Trailway Circle,                      Vice-President, Finance and Chief
                        Stittsville, Ontario K2S 1E2             Financial Officer
                        Canada
</TABLE>


         Approximately 15% of the outstanding common shares of Nordion are owned
by MDS Inc. ("MDS") and approximately 85% of the outstanding common shares of
Nordion and 780,205 Class A special shares of Nordion are owned by Laboratoires
MDS Quebec Ltee. ("Laboratoires"), a 100% subsidiary of MDS. Both MDS and
Laboratoires are incorporated under the Canada Business Corporation Act.


    The address of MDS:                     MDS Inc.
                                            100 International Boulevard
                                            Toronto, Canada M9W 6J6

    The address of Laboratoires:            Laboratoires MDS Quebec Ltee.
                                            Place Vendome
                                            5252 De Maisoneuve West
                                            Montreal, Quebec, Canada H4A 3S5

         MDS is a health and life science company and Laboratoires is a holding
company.

         The name, residence or business address, and present principal
occupation or employment of each director and executive officer of MDS are as
follows:


<TABLE>
<CAPTION>
<S>                    <C>                                    <C>
Wendy K. Dobson        2901 7th Concession,                   Director
                       R.R. #4
                       Uxbridge, Ontario L9P 1R4
                       Canada

John R. Evans          58 Highland Avenue,                    Director
                       Toronto, Ontario M4W 2A3
                       Canada

Wilfred G. Lewitt      4 Lowther Avenue,                      Director and Chairman
                       Toronto, Ontario M5R 1C6
                       Canada

Robert W. Luba         37 Sunnydene Crescent,                 Director
                       Toronto, Ontario M4N 3J5
                       Canada

Mary Mogford           3715 Lakeshore Road,                   Director
                       RR 8
                       Newcastle, Ontario L1B 1L9
                       Canada

John A. Rogers         7 Edenbridge Drive,                    Director, President and Chief
                       Toronto, Ontario M9A 3E8               Executive Officer
                       Canada

Ley S. Smith           2614 Aberdeen Drive,                   Director
                       Kalamazoo, Michigan 49008
                       USA

R. Michael Warren      Spruce Lane Farms,                     Director
                       RR#8
                       Grey County Road No. 18-#617739
                       Owen Sound, Ontario
                       N4K 5W4 Canada

Roger D. Wilson        68 Heath Street,                       Director
                       Toronto, Ontario M4T 1S3
                       Canada

Ronald H. Yamada       22 Pinehurst Crescent,                 Director and Executive Vice-President,
                       Islington, Ontario M9A 3A5             Global Markets & Corporate Affairs
                       Canada

Gary W. Goertz         20 McCauley Drive,                     Executive Vice-President, Finance and
                       Bolton, Ontario L7E 5R8                Chief Financial Officer
                       Canada

Paul Blake             1010 Bala Farms,                       Executive Vice-President,
                       West Chester, PA 19382                 Pharmaceutical Strategy & Programs
                       U.S.A.

James M. Reid          1237 Bowman Drive,                     Executive Vice-President, Organization
                       Oakville, Ontario L6M 3J5              Dynamics
                       Canada

Edward K. Rygiel       46 Woodlawn Avenue West,               Executive Vice-President, and
                       Toronto, Ontario M4V 1G7               President & CEO, MDS Capital Corp.
                       Canada

Robert W. Breckon      220 Donessle Drive,                    Senior Vice-President, Strategic
                       Oakville, Ontario L6J 3Y6              Initiatives and Investments
                       Canada

Peter E. Brent         328 Broadway Avenue,                   Senior Vice-President, General Counsel
                       Toronto, Ontario M4P 1W5               and Corporate Secretary
                       Canada

John D. Gleason        55 Chartwell Road,                     Senior Vice-President,
                       Oakville, Ontario L6J 3Z3              Business Development
                       Canada

William Bain           7 Ashley Park Road,                    Vice-President,
                       Toronto, Ontario M9A 4C9               Corporate Affairs
                       Canada

Wilma I. Jacobs        25 Boreham Circle,                     Vice-President,
                       Brampton, Ontario L6Z 1T3              Corporate Communications
                       Canada

Roman G. Szumski       40 Wood Willow Close SW,               Vice-President,
                       Calgary, Alberta T2W 4H3               Science & Technology
                       Canada

Kerry Thomas           3183 Galbraith Drive,                  Vice-President, Information &
                       Mississauga, Ontario                   Information Technology
                       L5L 4L7
                       Canada

Peter D. Winkley       6234 Kisby Drive                       Vice-President and Controller
                       Mississauga, Ontario
                       L5V 1M5 Canada
</TABLE>


         The name, residence or business address, and present principal
occupation or employment of each director and executive officer of Laboratoires
are as follows:


<TABLE>
<CAPTION>
<S>                    <C>                                    <C>
John A. Rogers         7 Edenbridge Drive,                    Director, President and Chief
                       Toronto, Ontario M9A 3E8               Executive Officer
                       Canada

Ronald H. Yamada       22 Pinehurst Crescent                  Director and Senior Vice-President
                       Islington, Ontario M9A 3A5
                       Canada

Peter D. Winkley       6234 Kisby Drive,                      Director, Vice-President and Controller
                       Mississauga, Ontario
                       L5V 1M5
                       Canada

Peter E. Brent         328 Broadway Avenue                    Director, Vice-President and Corporate
                       Toronto, Ontario M4P 1W5               Secretary
                       Canada

Edward K. Rygiel       46 Woodlawn Avenue West                Senior Vice-President
                       Toronto, Ontario M4V 1G7
                       Canada

Anthony Businskas      275 Rambler Court                      Vice-President
                       Oakville, Ontario L6H 3A6
                       Canada
</TABLE>


          (d) None of the entities or persons identified in this Item 2 has,
during the last five years, been convicted in a criminal proceeding (excluding
traffic violations or similar misdemeanors).

          (e) None of the entities or persons identified in this Item 2 has,
during the last five years, been a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such proceeding
was or is subject to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, federal or
state securities laws or finding any violation with respect to such laws.

          (f) Except for Messrs. Ley Smith and Paul Blake, who are citizens of,
respectively, the United States of America and the United Kingdom, each of the
directors and the executive officers of Nordion, MDS and Laboratoires are
citizens of Canada.


Item 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

          Item 3 is hereby amended and restated in its entirety as follows:

          The source and amount of the funds used or to be used by Nordion to
purchase shares of the Stock are as follows:


          SOURCE OF FUNDS                      AMOUNT OF FUNDS

          Working Capital of Nordion           About $5,009,559 (1)

          (1) This figure represents the total amount expended by Nordion for
all acquisitions and purchases of shares of the Stock.


Item 4.   PURPOSE OF TRANSACTION.

          Item 4 is hereby amended and restated in its entirety as follows:

          As described in greater detail below, all acquisitions by Nordion of
shares of Stock were the result of conversions of debt into shares of Stock.
Nordion elected to convert into shares of Stock loans and cash advances that it
had made to the Issuer, in view of assisting the Issuer as a development company
in the food irradiation business, after it became apparent that the Issuer was
not capable of repaying its indebtedness to Nordion.

          On September 5, 1990, Nordion agreed to supply the Issuer with
equipment and supplies necessary to operate its irradiation facility and entered
into a Financing Agreement and Security Agreement with the Issuer. The total
purchase price for the equipment and supplies was approximately $2,400,000, of
which $400,000 was paid and a balance of approximately $2,000,000 was due and
payable, without interest, on September 4, 1994.

          On July 1, 1991, MDS loaned $300,000 to the Issuer. Such loan was
evidenced by a Debenture due and payable, without interest, on July 1, 1993. The
Debenture was convertible into shares of Stock at the conversion rate of $4.50
per share. In addition, the Issuer granted MDS the right to convert the
aforementioned approximately $2,000,000 of indebtedness in the event that MDS
would acquire a controlling interest in Nordion. MDS acquired Nordion in
November 1991 through its subsidiary Laboratoires and assigned both its $300,000
loan and its conversion rights to Nordion. Nordion agreed not to exercise the
conversion rights prior to December 1, 1992.

          On October 22, 1991, the Issuer entered into a Reimbursement and
Indemnity Agreement with a view to indemnifying and reimbursing Nordion in
respect of all costs incurred in connection with its assistance of the Issuer in
obtaining a surety bond in the sum of $600,000. With a view to covering all
expenses under the Reimbursement and Indemnity Agreement, the Issuer executed a
Mortgage and Security Agreement in the amount $600,000 on October 22, 1991.

          On December 11, 1991, the Issuer entered into a new agreement with
Nordion whereby Nordion agreed to make available to the Issuer an additional
$850,000 for working capital purposes and $900,000 in the form of additional
supplies. The Issuer also agreed to change the conversion rate with respect to
the other outstanding indebtedness from $4.50 to $4.05. Furthermore, the
$300,000 Debenture payable to MDS was assigned by MDS to Nordion and included in
and restated as part of a new Debenture in the amount of $900,000 that was
issued on January 15, 1992. The new Debenture included both the aforementioned
$300,000 Debenture and $600,000 of the additional $850,000 that Nordion agreed
to lend to the Issuer. The new $900,000 Debenture was due and payable, without
interest, on September 4, 1994 and was convertible at any time at a conversion
rate of $4.05 per share of Stock.

          The Issuer executed an additional Mortgage and Security Agreement on
January 15, 1992 with a view to securing the $900,000 Debenture, up to $250,000
in additional loans from Nordion to the Issuer, as contemplated by the December
11, 1991 agreement, and up to $500,000 of additional loans to be provided by
Nordion to the Issuer at its sole discretion for the purposes of providing
additional working capital for the Issuer.

          In connection with the supply of additional materials by Nordion worth
$900,000, as contemplated in the agreement of December 11, 1991, the Issuer and
Nordion entered into a Financing and Security Agreement on February 21, 1992.
The Financing Agreement provided that the $900,000 was due and payable on
September 4, 1994 and convertible at any time into shares of Stock at a
conversion rate of $4.05 per share.

          On September 11, 1992, Nordion delivered additional supplies to the
Issuer and entered into an agreement with the Issuer with a view to confirming
the retention of ownership by Nordion of such supplies.

          On January 28, 1993, an additional $100,000 was loaned by Nordion to
the Issuer. The $100,000 indebtedness was due and payable, without interest, on
September 4, 1994 and was convertible at any time at a conversion rate of $8.00
per share of Stock.

          Although it was originally contemplated that all outstanding
indebtedness would become due and payable on September 4, 1994, Nordion agreed
to extend the due date because the Issuer was not capable of paying its debts
and Nordion was willing to accommodate the Issuer by enabling it to continue its
business without realizing its security interest. Pursuant to letters dated
March 31, 1994 and April 13, 1994, Nordion agreed to extend the repayment of the
indebtedness to September 4, 1995, subject to having the Issuer continue its
efforts in recruiting a new President and CEO and having interest accrue on such
outstanding indebtedness as of September 4, 1994 at the U.S. prime rate then in
effect plus 1%. On November 23, 1994, the payment date of the indebtedness was
further extended to January 4, 1996 and the conversion rate applicable to the
conversion into shares of Stock of all outstanding indebtedness, including
accrued interest, was set at the lower of $4.05 and the market price. The
payment date of the outstanding indebtedness has been further extended on April
2, 1996, March 13, 1997, December 12, 1997, March 23, 1999 and January 19, 2000,
and currently all indebtedness, including accrued interest, will become due and
payable on January 5, 2001.

          Since September 4, 1994, interest accrues on all outstanding
indebtedness at the U.S. prime rate from time to time in effect plus 1%. The
interest is payable quarterly and convertible into shares of Stock at the
election of Nordion at the then applicable conversion rate. The first payment
was due on February 4, 1995 and quarterly thereafter. On each of May 29, 1995,
June 30, 1995, September 30, 1995, October 31, 1995, January 1, 1996, March 31,
1996, June 30, 1996, September 30, 1996, December 31, 1996, March 31, 1997, June
30, 1997 and September 30, 1997, Nordion elected to convert into shares of Stock
all accrued and payable interest up to such date. Although interest continues to
accrue on all outstanding debt, Nordion has not elected to convert any of the
accrued and payable interest since September 30, 1997.

          Moreover, from May 29, 1995 until November 20, 1995, Nordion elected
to convert all accrued interest and cash advances made during such period into
shares of Stock at the lower of $4.05 and the then applicable market price.

          On December 10, 1995, Nordion agreed to provide the Issuer with
continuing financing and to convert into shares of Stock a sufficient portion of
Nordion's outstanding debt in order to ensure that the Issuer could maintain a
net equity of at least $1,000,000 until April 30, 1996. In exchange for which,
the Issuer agreed to reduce the conversion rate, applicable to all of Nordion's
outstanding indebtedness, to $0.80 per share of Stock.

          From December 15, 1995 until October 3, 1997, Nordion elected to
convert all accrued interest and cash advances made during such period into
shares of Stock at the then applicable conversion rate of $0.80 per share. In
addition, Nordion converted $3,215,000 of the about $3,700,000 of indebtedness
then outstanding at $0.80 per share of Stock.

          By letter agreement dated March 13, 1998, the Issuer and Nordion
confirmed their agreement to increase the conversion rate, at which all accrued
interest and cash advances made by Nordion to the Issuer since August 1, 1997
would be convertible into shares of Stock at 70% of the closing price on the
last trade date prior to the exercise of the conversion right. However, the 70%
conversion rate did not apply to the cash advances and accrued interest that had
already been converted between August 1, 1997 and March 13, 1998, i.e., the
September 22, 1997 and October 3, 1997 cash advances conversions and the
September 30, 1997 accrued interest conversion.

          Since October 3, 1997, Nordion has not elected to convert any of the
outstanding indebtedness, accrued interest on such indebtedness or any of the
cash advances that it has made since then. For purposes of this filing, Nordion
only continues to acquire beneficial ownership of shares of Stock by virtue of
its ability to convert the accrued interest and its further cash advances at the
aforementioned floating conversion rate of 70% of the market price. Furthermore,
Nordion has not made any cash advances that are still outstanding and
convertible into shares of Stock since June 6, 1998. After June 6, 1998, Nordion
only made two cash advances on, respectively, August 28, 1998 and October 23,
1998. Moreover, those advances were repaid by the Issuer within 10 business
days, i.e., on September 9, 1998 and October 29, 1998, respectively.

          In order to enable the Issuer to open a line of credit at Fleet
National Bank, Nordion agreed to guarantee such line of credit. In particular,
Nordion executed a number of superseding Unlimited Guaranty and Indemnity
Agreements in favor of Fleet National Bank. The first Unlimited Guaranty and
Indemnity Agreement was signed on October 29, 1998 and limited Nordion's
liability to $300,000. The most recent Unlimited Guaranty was signed by Nordion
on December 17, 1999 and limits Nordion's indemnification obligations to
$500,000. In connection herewith, the Issuer executed a letter on October 23,
1998, confirming its agreement to indemnify Nordion for all sums that it would
have to pay under the Unlimited Guaranty. In addition, the letter provides that
all outstanding amounts pursuant to such guaranty will accrue interest and shall
be convertible into shares of Stock at 70% of the closing price on the last
trade date prior to the exercise of the conversion right.

          Between November 18, 1998 and January 6, 2000, Nordion sold 717,774
shares of Stock.

          On March 6, 2000, Nordion and the Issuer entered into an agreement
with a view to simplifying and consolidating the security interests that secure
Nordion's outstanding debt and other obligations. The agreement aims at (i)
releasing and discharging most of the underlying security interests registered
in the State of Florida in favor of Nordion and the October 22, 1991 and January
15, 1992 Mortgage and Security Agreement, and (ii) implementing a new Mortgage
and Security Agreement which is contemplated to be executed in the near future.

          Nordion is represented on the Board of Directors of the Issuer by
Messrs. Craig Hunter and David Nicholds. Messrs. Hunter and Nicholds are
presently also members of the Executive Committee and the Human Resources
Committee of the Issuer, and Mr. Nicholds acts as the Issuer's corporate
secretary. Mr. Nicholds expects to resign as the Issuer's corporate secretary in
the near future. Moreover, both the Executive Committee and the Human Resources
Committee are expected to be discontinued, as the Board of Directors has in
effect acted as the Executive Committee and assumed all responsibilities
relating to human resources matters.

          Nordion is presently involved in industrial irradiation activities
that potentially compete with the activities of the Issuer. Nordion also
supplies irradiation equipment, sources and isotopes to customers that are
direct competitors of the Issuer, and may enter into strategic alliances and
joint ventures with such customers.

          Except as described herein, none of Nordion, MDS or Laboratoires have
any plans or proposals which relate to or would result in any of (a) through (j)
of Item 4.


Item 5.   INTEREST IN SECURITIES OF THE ISSUER.

          Item 5 is hereby amended and restated in its entirety as follows:

          (a) At the close of business on March 31, 2000, Nordion beneficially
owned 6,232,992 shares of Stock, which constitutes approximately 56.1% of the
outstanding shares of Stock. The number of shares of Stock beneficially owned on
March 31, 2000 has been computed by aggregating (i) the number of shares of
Stock that Nordion actually owns pursuant to its election to convert portions of
the outstanding indebtedness, cash advances and accrued interest into shares of
Stock, and (ii) the number of shares of Stock into which Nordion could elect to
convert the remaining outstanding indebtedness, cash advances and due and
payable accrued interest on March 31, 2000, on the basis of the closing price of
March 31, 2000, i.e., 70% of $4.375 or $3.0625. Pursuant to publicly available
information, 10,331,201 shares of the Stock were outstanding on March 31, 2000.

          To the best of the knowledge of Nordion, MDS and Laboratoires other
than as set forth above, none of the persons named in Item 2 herein is the
beneficial owner of any shares of the Stock.

          Messrs. Craig Hunter and David Nicholds, employees of Nordion, are
currently directors of the Issuer. Messrs. Hunter and Nicholds disclaim
beneficial ownership of any securities of the Issuer beneficially owned by
Nordion.

          (b) Nordion has the sole power to vote or direct the vote and to
dispose or direct the disposition of 6,232,992 shares of the Stock.

          (c) The following table describes transactions in the Stock by Nordion
since December 1, 1992.

<TABLE>
                                                         Purchase
    Date of                    Number of                   (P)                 Price per               Where and how
  Transaction                  Securities               or Sale (S)              Share              transaction effected
  -----------                  ----------               -----------            ---------            --------------------
   <S>              <C>           <C>           <C>         <C>              <C>                    <C>
   12/01/92         a             931,567       (1)         P                4.05 / 8.00            All purchases result
   05/29/95                       152,379       (2)         P                     1.69              from the right to
   06/30/95                        21,622       (2)         P                     1.50              convert, and
   07/13/95                        16,667       (3)         P                     1.50              conversions,
   07/27/95                        87,617       (3)         P                     1.25              of debt and accrued
   09/30/95                        74,970       (2)         P                     1.25              interest thereon into
   10/31/95                        25,220       (2)         P                     1.25              shares of Stock
   11/20/95                        20,000       (3)         P                     1.25              effected through the
   12/10/95         b           4,625,000       (1)         P                     0.80              delivery of share
   12/15/95                        43,750       (3)         P                     0.80              certificates by the
   01/01/96                        77,149       (2)         P                     0.80              Issuer
   01/05/96                        18,750       (3)         P                     0.80
   01/23/96                        31,250       (3)         P                     0.80
   02/09/96                        18,750       (3)         P                     0.80
   03/01/96                        37,500       (3)         P                     0.80
   03/31/96                       107,846       (2)         P                     0.80
   04/02/96                        41,250       (3)         P                     0.80
   05/02/96                        33,750       (3)         P                     0.80
   06/04/96                        37,500       (3)         P                     0.80
   06/30/96                       107,104       (2)         P                     0.80
   07/02/96                        31,250       (3)         P                     0.80
   07/26/96                        37,500       (3)         P                     0.80
   08/16/96                        90,355       (3)         P                     0.80
   09/10/96                        31,250       (3)         P                     0.80
   09/26/96                         4,676       (3)         P                     0.80
   09/30/96                       102,840       (2)         P                     0.80
   10/11/96                        25,000       (3)         P                     0.80
   11/07/96                        25,000       (3)         P                     0.80
   12/09/96                        31,250       (3)         P                     0.80
   12/16/96                        22,500       (3)         P                     0.80
   12/31/96                       102,840       (2)         P                     0.80
   01/13/97                        18,750       (3)         P                     0.80
   02/07/97                        25,000       (3)         P                     0.80
   02/28/97                        25,000       (3)         P                     0.80
   03/13/97                        92,227       (3)         P                     0.80
   03/17/97                        23,125       (3)         P                     0.80
   03/31/97                       110,323       (2)         P                     0.80
   04/16/97                        18,750       (3)         P                     0.80
   06/03/97                        16,250       (3)         P                     0.80
   06/13/97                        25,000       (3)         P                     0.80
   06/30/97                        96,254       (2)         P                     0.80
   07/04/97                        25,000       (3)         P                     0.80
   07/17/97                        25,000       (3)         P                     0.80
   07/31/97                        25,000       (3)         P                     0.80
   08/26/97                        25,000       (3)         P                     0.80
   09/22/97                        25,000       (3)         P                     0.80
   09/30/97                        96,254       (2)         P                     0.80
   10/03/97                        25,000       (3)         P                     0.80
   11/04/97                         9,796       (4)         P                     3.0625
   11/04/97                         5,826       (5)         P                     3.0625
   11/18/97                         8,163       (4)         P                     3.0625
   12/05/97                         6,531       (4)         P                     3.0625
   12/19/97                         6,531       (4)         P                     3.0625
   01/09/98                         6,531       (4)         P                     3.0625
   02/02/98                         3,265       (4)         P                     3.0625
   02/04/98                        11,720       (5)         P                     3.0625
   02/12/98                         6,531       (4)         P                     3.0625
   03/09/98                        24,490       (4)         P                     3.0625
   04/03/98                         6,770       (4)         P                     3.0625
   04/09/98                         4,898       (4)         P                     3.0625
   04/24/98                         4,898       (4)         P                     3.0625
   05/04/98                         5,292       (5)         P                     3.0625
   05/08/98                         6,531       (4)         P                     3.0625
   06/12/98         c               8,163       (4)         P                     3.0625
   08/04/98                         6,380       (5)         P                     3.0625
   11/04/98                         6,523       (5)         P                     3.0625
   11/18/98                         5,000                   S                     3.00              All sales
   11/19/98                         6,500                   S                     2.75              effected through
   11/20/98                         6,000                   S                     3.02              a broker on the
   11/23/98                         6,500                   S                     3.00              Nasdaq
   11/24/98                         7,000                   S                     3.05
   11/25/98                         2,500                   S                     3.25
   11/27/98                         3,000                   S                     3.25
   11/30/98                         2,000                   S                     3.06
   12/02/98                         2,000                   S                     2.94
   12/02/98                         2,000                   S                     3.00
   12/03/98                         3,100                   S                     3.00
   12/04/98                         3,900                   S                     3.00
   12/07/98                         2,500                   S                     3.06
   12/07/98                         1,500                   S                     3.09
   12/07/98                           500                   S                     3.13
   12/07/98                           500                   S                     3.25
   12/08/98                         5,000                   S                     3.06
   12/09/98                         1,000                   S                     3.00
   12/09/98                         1,500                   S                     3.06
   12/09/98                         2,500                   S                     3.13
   12/10/98                         2,000                   S                     3.00
   12/10/98                           500                   S                     3.13
   12/11/98                         2,500                   S                     3.06
   01/29/99                         2,000                   S                     2.50
   02/01/99                         1,000                   S                     2.50
   02/02/99                           900                   S                     2.50
   02/03/99                         9,100                   S                     2.50
   02/04/99                         6,185       (5)         P                     3.0625
   02/04/99                         2,500                   S                     2.50
   02/05/99                         2,500                   S                     2.50
   02/18/99                         1,000                   S                     4.81
   02/18/99                         1,500                   S                     4.63
   02/18/99                         8,900                   S                     4.69
   02/18/99                         1,100                   S                     4.75
   02/24/99                         4,000                   S                     5.22
   02/24/99                         1,000                   S                     5.06
   02/24/99                         4,000                   S                     5.09
   02/24/99                         2,500                   S                     5.13
   02/24/99                         1,000                   S                     5.18
   02/24/99                         1,000                   S                     5.22
   02/24/99                         9,000                   S                     4.94
   02/24/99                         6,500                   S                     5.00
   02/24/99                         3,000                   S                     5.06
   02/25/99                         6,000                   S                     5.00
   02/25/99                         2,000                   S                     5.03
   02/25/99                         2,000                   S                     5.06
   02/25/99                         9,500                   S                     5.09
   02/25/99                        24,100                   S                     5.13
   02/25/99                        11,900                   S                     5.25
   04/06/99                         6,700                   S                     4.38
   04/06/99                         2,200                   S                     4.44
   04/06/99                         9,100                   S                     4.50
   04/06/99                        12,000                   S                     4.56
   04/06/99                         1,100                   S                     4.63
   04/07/99                        10,900                   S                     4.38
   04/07/99                         5,000                   S                     4.44
   04/07/99                         3,000                   S                     4.50
   04/08/99                         2,500                   S                     4.06
   04/08/99                        15,000                   S                     4.13
   04/09/99                         2,500                   S                     4.00
   04/09/99                         1,000                   S                     4.06
   04/09/99                         5,000                   S                     4.13
   04/12/99                           200                   S                     4.00
   04/13/99                        13,506                   S                     3.75
   04/13/99                         1,000                   S                     3.88
   04/13/99                         1,000                   S                     3.94
   04/13/99                         5,000                   S                     4.00
   04/13/99                         1,000                   S                     4.13
   04/14/99                         2,000                   S                     3.88
   04/14/99                         2,500                   S                     3.94
   04/14/99                         2,500                   S                     4.00
   04/14/99                         2,500                   S                     4.06
   04/14/99                         2,500                   S                     4.13
   04/15/99                         3,200                   S                     3.55
   04/15/99                         3,800                   S                     3.69
   04/15/99                         4,500                   S                     3.75
   04/15/99                         2,500                   S                     3.81
   04/16/99                         4,700                   S                     3.50
   04/16/99                         2,000                   S                     3.56
   04/16/99                         5,300                   S                     3.63
   04/19/99                        10,500                   S                     3.50
   04/19/99                         2,500                   S                     3.56
   04/20/99                         3,500                   S                     3.56
   04/20/99                         2,500                   S                     3.86
   04/20/99                         6,000                   S                     3.50
   04/21/99                         8,200                   S                     3.50
   04/21/99                         9,000                   S                     3.56
   04/21/99                         3,000                   S                     3.63
   04/21/99                         4,800                   S                     3.38
   04/21/99                         9,000                   S                     3.44
   04/22/99                         4,900                   S                     3.34
   04/22/99                         5,500                   S                     3.50
   04/22/99                           600                   S                     3.56
   04/23/99                        12,000                   S                     3.50
   04/23/99                         4,000                   S                     3.56
   04/23/99                         4,000                   S                     3.63
   04/23/99                         1,000                   S                     3.75
   04/23/99                         1,000                   S                     3.88
   04/23/99                         1,000                   S                     3.94
   04/23/99                        14,000                   S                     4.00
   04/26/99                           200                   S                     3.94
   04/26/99                         1,900                   S                     4.00
   04/26/99                         5,200                   S                     4.06
   04/26/99                         9,900                   S                     4.13
   04/26/99                         6,000                   S                     4.25
   04/27/99                         4,900                   S                     3.62
   04/27/99                         3,000                   S                     3.75
   04/27/99                         2,800                   S                     3.88
   04/27/99                           100                   S                     4.00
   04/28/99                         2,800                   S                     3.38
   04/28/99                           800                   S                     3.44
   04/28/99                         5,500                   S                     3.50
   04/28/99                         4,500                   S                     3.63
   04/28/99                         1,000                   S                     3.75
   04/29/99                         4,900                   S                     3.25
   04/29/99                         1,000                   S                     3.31
   05/04/99                         5,905       (5)         P                     3.0625
   05/04/99                         5,500                   S                     3.25
   05/04/99                         2,000                   S                     3.31
   05/05/99                         7,000                   S                     3.25
   05/06/99                         5,000                   S                     3.25
   05/07/99                         5,000                   S                     3.25
   05/10/99                         1,700                   S                     3.25
   05/11/99                         5,400                   S                     3.25
   05/11/99                         1,500                   S                     3.31
   05/12/99                         4,400                   S                     3.25
   05/13/99                         6,500                   S                     3.25
   05/13/99                         1,000                   S                     3.31
   05/13/99                         1,500                   S                     3.38
   05/13/99                         1,000                   S                     3.44
   05/14/99                         5,000                   S                     3.25
   05/14/99                         1,000                   S                     3.38
   05/14/99                         3,000                   S                     3.44
   05/14/99                         3,000                   S                     3.50
   05/14/99                         1,000                   S                     3.56
   05/17/99                         4,300                   S                     3.50
   05/17/99                         1,500                   S                     3.56
   05/17/99                         2,200                   S                     3.63
   05/18/99                         5,000                   S                     3.50
   05/19/99                         5,000                   S                     4.00
   05/19/99                         1,000                   S                     4.06
   05/19/99                         1,000                   S                     4.13
   05/19/99                         1,000                   S                     4.19
   08/04/99                         6,410       (5)         P                     3.0625
   08/24/99                         3,500                   S                     4.125
   08/25/99                           100                   S                     4.625
   08/25/99                        10,500                   S                     4.25
   08/25/99                         2,500                   S                     4.375
   08/25/99                         3,400                   S                     4.50
   08/26/99                         2,000                   S                     4.00
   08/26/99                           500                   S                     4.1875
   08/26/99                         1,300                   S                     4.25
   08/26/99                         1,100                   S                     4.375
   08/26/99                           100                   S                     4.50
   08/27/99                           500                   S                     4.1875
   09/23/99                         2,000                   S                     3.75
   09/24/99                         5,000                   S                     3.75
   09/24/99                         1,500                   S                     3.88
   09/24/99                         3,500                   S                     4.00
   09/27/99                         1,400                   S                     3.82
   09/27/99                         2,600                   S                     4.00
   09/28/99                         1,000                   S                     3.94
   09/28/99                         1,900                   S                     4.00
   09/28/99                           500                   S                     4.06
   09/28/99                           100                   S                     4.09
   09/29/99                           100                   S                     3.94
   09/29/99                         1,500                   S                     4.00
   10/05/99                        10,000                   S                     4.00
   10/06/99                         2,500                   S                     4.19
   10/06/99                         4,900                   S                     4.25
   10/06/99                         2,500                   S                     4.38
   10/06/99                         1,000                   S                     4.41
   10/06/99                           500                   S                     4.44
   10/06/99                         2,000                   S                     4.50
   10/07/99                         4,500                   S                     4.25
   11/02/99                         2,000                   S                     4.13
   11/02/99                           500                   S                     4.25
   11/03/99                         1,500                   S                     4.13
   11/03/99                         1,000                   S                     4.19
   11/04/99                         1,000                   S                     4.06
   11/04/99                         1,000                   S                     4.13
   11/04/99                         6,738       (5)         P                     3.0625
   11/05/99                         2,000                   S                     4.19
   11/05/99                         2,500                   S                     4.25
   11/05/99                           500                   S                     4.31
   11/08/99                         1,000                   S                     4.13
   11/08/99                           500                   S                     4.19
   11/08/99                         1,000                   S                     4.25
   11/09/99                         2,000                   S                     4.13
   11/09/99                         2,000                   S                     4.25
   11/09/99                         1,000                   S                     4.38
   11/10/99                         1,500                   S                     4.00
   11/10/99                         1,500                   S                     4.13
   11/11/99                         3,000                   S                     4.00
   12/08/99                         1,000                   S                     6.69
   12/08/99                         1,500                   S                     6.81
   12/08/99                         2,500                   S                     6.94
   12/08/99                           500                   S                     6.97
   12/08/99                         4,500                   S                     7.00
   12/08/99                         1,000                   S                     7.13
   12/08/99                         1,000                   S                     7.25
   12/08/99                         1,900                   S                     7.31
   12/08/99                         1,000                   S                     7.38
   12/08/99                           100                   S                     7.44
   12/09/99                         8,000                   S                     7.00
   12/09/99                         1,500                   S                     7.06
   12/09/99                         1,000                   S                     7.41
   12/09/99                         3,000                   S                     7.44
   12/09/99                           500                   S                     7.50
   12/09/99                           400                   S                     7.56
   12/09/99                         2,600                   S                     7.63
   12/10/99                         1,000                   S                     5.75
   12/10/99                         1,000                   S                     6.38
   12/10/99                         1,000                   S                     7.03
   12/10/99                         3,168                   S                     6.63
   01/03/00                         2,500                   S                     6.13
   01/03/00                         1,500                   S                     6.25
   01/04/00                         1,000                   S                     6.19
   01/05/00                         5,500                   S                     6.006
   01/06/00                         1,500                   S                     5.69
   01/06/00                         1,100                   S                     5.75
   01/06/00                           300                   S                     6.00
   02/04/00                         7,221       (5)         P                     3.0625
</TABLE>



- ----------------------

a    Shares underlying about $3,822,000 of convertible indebtedness due by the
Issuer to Nordion, of which about 3,722,000 was convertible into shares of Stock
at $4.05 per share and $100,000 was convertible into shares of Stock at $8.00
per share. See also beneficial ownership reported on December 10, 1995.

b    Shares underlying about $3,700,000 of convertible indebtedness due by the
Issuer to Nordion. Due to changes in the Canadian/U.S. dollar exchange rate
since December 1992, the outstanding indebtedness decreased from about
$3,822,000 in December 1992 to about 3,700,000 in December 1995. On December 10,
1995, the outstanding convertible conversion rate at which Nordion could elect
to convert all then outstanding indebtedness into shares of Stock was reduced to
$0.80. As a result, Nordion acquired beneficial ownership of 4,625,000 shares of
Stock instead of the beneficially owned 931,567 previously reported on December
1, 1992. Of the about $3,700,000 convertible indebtedness, Nordion has elected
to convert $3,215,000 into shares of Stock on the following dates: (i) $65,000
on February 9, 1996, (ii) $90,000 on March 31, 1996, (iii) $50,000 on June 6,
1996, (iv) $190,000 on March 14, 1997, (v) $120,000 on March 31, 1997, (vi)
$100,000 on September 30, 1997, (vii) $1,000,000 on November 3, 1997 and (viii)
$1,600,000 on December 29, 1997. All these conversions into shares of Stock were
converted at the then applicable conversion rate of $0.80 per share.

c    Since June 6, 1998, Nordion has only made two cash advances to the Issuer:
(i) $10,000 on August 28, 1998 and (ii) $15,000 on October 23, 1998. Although
both cash advances were convertible into shares of Stock at 70% of the closing
price on the last trade date prior to the exercise of the conversion right, both
cash advances were repaid by the Issuer on September 9, 1998 and October 29,
1998, respectively.

(1) Beneficial ownership arising out of outstanding indebtedness convertible at
the election of Nordion.

(2) Conversion of the accrued interest on the outstanding indebtedness at the
then applicable conversion rate.

(3) Conversion of cash advances that were made by Nordion to the Issuer and that
have been converted at the then applicable conversion rate.

(4) Cash advances made by Nordion to the Issuer that have not yet been converted
into shares of Stock and that are convertible at 70% of the closing price on the
last date prior to the exercise of the conversion right.

(5) Accrued Interest on the outstanding indebtedness that has not yet been
converted into shares of Stock and that are convertible at 70% of the closing
price on the last date prior to the exercise of the conversion right.

          Except as described above, neither Nordion, MDS or Laboratoires nor,
to the best knowledge of Nordion, MDS and Laboratoires, any of the persons
listed in Item 2 effected any transactions in the Stock since December 1, 1992.

          (d) Except as set forth herein, each of Nordion, MDS and Laboratoires
affirms that no person other than Nordion, MDS and Laboratoires have the right
to receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, the shares of the Stock owned by Nordion, MDS and
Laboratoires.

          (e) Not applicable.


Item 6.   CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
          TO SECURITIES OF THE ISSUER.

          Item 6 is hereby amended and restated in its entirety as
follows:

          Except as described herein, none of Nordion, MDS, Laboratoires, or, to
the best knowledge of Nordion, MDS and Laboratoires, any of the directors and
executive officers of Nordion, MDS or Laboratoires, has any contract,
arrangement, understanding or relationship with any other person regarding the
shares of Stock, including but not limited to transfer or voting of any such
shares, finder's fees, joint ventures, loan or option arrangements, puts or
calls, guarantees or profits, division of profits or loss or the giving or
withholding of proxies.



<PAGE>


Item 7.     MATERIALS TO BE FILED AS EXHIBITS.

            Item 7 is hereby amended and restated in its entirety as follows:

                                    Exhibits
                                    --------

1.  Financing Agreement between the Issuer and Nordion, dated September 5, 1990.

2.  Security Agreement between the Issuer and Nordion, dated September 5, 1990.

3.  Subordinated Debenture between the Issuer and MDS, dated July 1, 1991.

4.  Agreement between the Issuer and MDS, dated July 9, 1991.

5.  Subscription Agreement between the Issuer and MDS, dated July 11, 1991.

6.  Mortgage and Security Agreement between the Issuer and Nordion, dated
    October 22, 1991.

7.  Reimbursement and Indemnity Agreement between the Issuer and Nordion, dated
    October 22, 1991.

8.  Agreement between the Issuer and Nordion, dated December 11, 1991.

9.  Convertible Debenture between the Issuer and Nordion, dated January 15,
    1992.

10. Mortgage and Security Agreement between the Issuer and Nordion, dated
    January 15, 1992

11. Financing Agreement between the Issuer and Nordion, dated February 21, 1992.

12. Security Agreement between the Issuer and Nordion, dated February 21, 1992.

13. Assignment of right, title and interest in the Subordinated Debenture,
    dated July 1, 1991 and the Agreement, dated July 9, 1991, by MDS to
    Nordion, dated January 28, 1992.

14. Letter dated March 6, 1992, regarding the surrender of the Convertible
    Subordinated Debenture to Nordion by MDS.

15. Letter dated August 17, 1992, regarding the understanding of convertibility
    into shares of Stock of the Issuer's obligations to Nordion.

16. Agreement dated September 11, 1992 regarding the delivery of certain
    supplies and the retention of ownership of such supplies by Nordion.

17. Letter dated January 28, 1993, confirming the agreement for additional
    funding to the Issuer by Nordion.

18. Letter from Nordion dated March 31, 1994, regarding the payment of
    indebtedness by the Issuer and the extension of the payment date.

19. Letter Agreement between the Issuer and Nordion regarding the payment of
    indebtedness by the Issuer and the extension of the payment date, dated
    April 13, 1994.

20. Letter Agreement between the Issuer and Nordion to further extend payment of
    indebtedness, dated November 23, 1994.

21. Letter confirming agreement to extend payment of indebtedness, dated
    February 17, 1995.

22. Letter confirming the Issuer's fulfillment of conditions of the November 23,
    1994 Letter Agreement, dated February 17, 1995.

23. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated May 29, 1995.

24. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated June 30, 1995.

25. Letter Agreement between the Issuer and Nordion to further extend payment of
    indebtedness, dated July 4, 1995

26. Letter confirming Nordion's conversion of a cash advance of $25,000 into
    16,667 shares of Stock, dated July 13, 1995.

27. Letter Agreement between the Issuer and Nordion regarding the Nordion's
    conversion of a cash advance of $109,521 into 87,617 shares of Stock,
    dated July 27, 1995.

28. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated September 30, 1995.

29. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated October 25, 1995.

30. Letter confirming Nordion's conversion of a cash advance of $25,000 into
    20,000 shares of Stock, dated November 20, 1995.

31. Agreement between the Issuer and Nordion, dated December 10, 1995.

32. Letter confirming extension of payment due date, dated December 13, 1995.

33. Letter confirming Nordion's conversion of a cash advance of $35,000 into
    43,750 shares of Stock, dated December 15, 1995.

34. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated December 20,
    1995.

35. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated January 1, 1996.

36. Letter confirming Nordion's conversion of a cash advance of $15,000 into
    18,750 shares of Stock, dated January 5, 1996.

37. Letter confirming Nordion's conversion of a cash advance of $25,000 into
    31,250 shares of Stock, dated January 23, 1996.

38. Letter confirming Nordion's conversion of a cash advance of $15,000 into
    18,750 shares of Stock, dated February 9, 1996.

39. Letter confirming Nordion's conversion of a cash advance of $30,000 into
    37,500 shares of Stock, dated March 1, 1996.

40. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated March 31, 1996.

41. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated March 31, 1996.

42. Letter Agreement between the Issuer and Nordion to further extend payment of
    indebtedness, dated April 2, 1996.

43. Letter confirming Nordion's conversion of a cash advance of $33,000 into
    41,250 shares of Stock, dated April 2, 1996.

44. Letter confirming Nordion's conversion of a cash advance of $27,000 into
    33,750 shares of Stock, dated May 2, 1996.

45. Letter confirming Nordion's conversion of a cash advance of $30,000 into
    37,500 shares, dated June 4, 1996.

46. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated June 30, 1996.

47. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated June 30, 1996.

48. Letter confirming Nordion's conversion of a cash advance of $25,000 into
    31,250 shares of Stock, dated July 2, 1996.

49. Letter confirming Nordion's conversion of a cash advance of $30,000 into
    37,500 shares of Stock, dated July 26, 1996.

50. Letter Agreement between the Issuer and Nordion regarding the conversion
    of a cash advance of $72,285 into 90,355 shares of Stock, dated August
    16, 1996.

51. Letter confirming Nordion's conversion of $25,000 into 31,250 shares of
    Stock, dated September 10, 1996.

52. Letter confirming Nordion's conversion of a cash advance of $3,741 into
    4,676 shares of Stock, dated September 26, 1996.

53. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated September 30, 1996.

54. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares, dated October 11, 1996.

55. Letter confirming Nordion's conversion of $20,000 into 25,000 shares of
    Stock, dated November 7, 1996.

56. Letter confirming Nordion's conversion of $25,000 into 31,250 shares of
    Stock, dated December 9, 1996.

57. Letter confirming Nordion's conversion of $18,000 into 22,500 shares of
    Stock, dated December 16, 1996.

58. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated December 31,
    1996.

59. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated December 31, 1996.

60. Letter confirming Nordion's conversion of a cash advance of $15,000 into
    18,750 shares of Stock, dated January 13, 1997.

61. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated February 7, 1997.

62. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated February 28, 1997.

63. Letter Agreement between the Issuer and Nordion regarding the conversion
    of a cash advance of $73,781 into 92,227 shares of Stock, dated March 13,
    1997.

64. Letter Agreement between the Issuer and Nordion to further extend payment of
    indebtedness, dated March 13, 1997.

65. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated March 14, 1997.

66. Letter confirming Nordion's conversion of a cash advance of $18,500 into
    23,125 shares of Stock, dated March 17, 1997.

67. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated March 31, 1997.

68. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated March 31, 1997.

69. Letter confirming Nordion's conversion of a cash advance of $15,000 into
    18,750 shares of Stock, dated April 16, 1997.

70. Letter confirming Nordion's conversion of a cash advance of $13,000 into
    16,250 shares of Stock, dated June 3, 1997.

71. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated June 13, 1997.

72. Letter Agreement between Issuer and Nordion regarding the conversion of
    accrued interest into shares of Stock, dated June 30, 1997.

73. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated July 4, 1997.

74. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated July 17, 1997.

75. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated July 31, 1997.

76. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated August 26, 1997.

77. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated September 22, 1997.

78. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated September 30,
    1997.

79. Letter Agreement between the Issuer and Nordion regarding the conversion
    of accrued interest into shares of Stock, dated September 30, 1997.

80. Letter confirming Nordion's conversion of a cash advance of $20,000 into
    25,000 shares of Stock, dated October 3, 1997.

81. Letter Agreement between the Issuer and Nordion regarding the conversion
    of outstanding indebtedness into shares of Stock, dated November 3, 1997.

82. Letter confirming Nordion's convertible cash advance of $12,000, dated
    November 10, 1997.

83. Letter confirming Nordion's convertible cash advance of $18,000, dated
    November 10, 1997.

84. Letter confirming Nordion's convertible cash advance of $25,000, dated
    November 18, 1997.

85. Letter confirming Nordion's convertible cash advance of $20,000, dated
    December 5, 1997.

86. Letter confirming agreement to extend payment of indebtedness, dated
    December 12, 1997.

87. Letter confirming Nordion's convertible cash advance of $20,000, dated
    December 19, 1997.

88. Letter Agreement between Issuer and Nordion regarding the conversion of
    outstanding indebtedness into shares of Stock, dated December 29, 1997.

89. Letter Agreement between Issuer and Nordion regarding the conversion of
    outstanding indebtedness into shares of Stock, dated December 29, 1997.

90. Letter confirming Nordion's convertible cash advance of $20,000, dated
    January 9, 1998.

91. Letter confirming Nordion's repayable and convertible cash advance of
    $10,000, dated February 2, 1998.

92. Letter confirming Nordion's repayable and convertible cash advance of
    $20,000, dated February 12, 1998.

93. Letter confirming Nordion's convertible cash advance of $75,000, dated
    March 9, 1998.

94. Letter confirming applicable conversion rate since August 1, 1997, dated
    March 13, 1998.

95. Letter confirming Nordion's repayable and convertible cash advance of
    $20,732, dated April 3, 1998.

96. Letter confirming Nordion's repayable and convertible cash advance of
    $15,000, dated April 9, 1998.

97. Letter confirming Nordion's repayable and convertible cash advance of
    $15,000, dated April 24, 1998.

98. Letter confirming Nordion's convertible cash advance of $20,000, dated May
    8, 1998.

99. Letter confirming Nordion's repayable and convertible cash advance of
    $25,000, dated June 12, 1998.

100. Letter confirming Nordion's repayable and convertible cash advance of
     $10,000, dated August 28, 1998.

101. Letter confirming bridge loan to the Issuer by Nordion, dated October 23,
     1998.

102. Letter confirming indemnification by the Issuer of Nordion in connection
     with the Unlimited Guaranty and Indemnity Agreement, dated October 23,
     1998.

103. Unlimited Guaranty and Indemnity Agreement, dated October 29, 1998.

104. Unlimited Guaranty and Indemnity Agreement, dated December 17, 1999.

105. Letter Agreement between the Issuer and Nordion concerning extension of
     payment of debt, dated March 23, 1999.

106. Letter Agreement between the Issuer and Nordion concerning extension of
     payment of debt, dated January 19, 2000.

107. Letter Agreement between the Issuer and Nordion concerning simplification
     of security interests, dated March 6, 2000.



<PAGE>


          After reasonable inquiry and to the best of its knowledge and belief,
the undersigned certify that the information set forth in this statement is
true, complete and correct.

          DATED:  April 7, 2000

                                        MDS NORDION INC.,




                                        By: /s/ David Nicholds
                                            ------------------------------
                                           Name:   David Nicholds
                                           Title:  Vice-President



                                        MDS INC.,




                                        By: /s/ Peter E. Brent
                                            ------------------------------
                                           Name:  Peter E. Brent
                                           Title: Senior Vice-President
                                                    & General Counsel




                                        LABORATOIRES MDS QUEBEC LTEE.,




                                        By: /s/ Peter E. Brent
                                            ------------------------------
                                           Name:  Peter E. Brent
                                           Title: Vice-President
                                                    & Corporate Secretary

<PAGE>


                                                                   Schedule A
                                                                   ----------


                  Joint Filing Agreement - Dated April 7, 2000
                  --------------------------------------------


          We, the undersigned, hereby express our agreement that the attached
Amendment 4 to Schedule 13D is, and any future amendments thereto may be, filed
on behalf of each of us.


                                        MDS NORDION INC.,




                                        By: /s/ David Nicholds
                                            ------------------------------
                                           Name:   David Nicholds
                                           Title:  Vice-President



                                        MDS INC.,




                                        By: /s/ Peter E. Brent
                                            ------------------------------
                                           Name:  Peter E. Brent
                                           Title: Senior Vice-President
                                                    & General Counsel




                                        LABORATOIRES MDS QUEBEC LTEE.,




                                        By: /s/ Peter E. Brent
                                            ------------------------------
                                           Name:  Peter E. Brent
                                           Title: Vice-President
                                                    & Corporate Secretary


                               FINANCING AGREEMENT

     THIS FINANCING AGREEMENT (this "Agreement") is made and entered into this
5th day of September, 1990, by and between VINDICATOR OF FLORIDA, INC.
("Vindicator"), a Florida corporation whose principal offices are located in
Plant City, Florida, and NORDION INTERNATIONAL INC ("Nordion"), a Canadian
corporation whose principal offices are located in Kanata Ontario, Canada.

     WHEREAS, Vindicator desires to build a successful commercial food
demonstration irradiation facility in or near Mulberry, Florida, principally for
the purpose of irradiating food and related products; and

     WHEREAS, Nordion desires to develop and promote the commercialization and
demonstration of food irradiation;

     NOW, THEREFORE, in consideration of the premises and the mutual covenants
and agreements contained herein and other good and valuable consideration the
receipt and sufficiency of which are hereby acknowledged by both of the parties
to this Agreement, the parties hereby agree as follows:

          1. Upon the terms and subject to the conditions set forth herein,
     Nordion shall design, manufacture and install, and Vindicator shall
     purchase from Nordion, a fully operational gamma radiation processing
     pallet irradiator (the "Irradiator"), complete with an initial radiation
     source of 400,000 curies of cobalt 60 (the "Source"), at Vindicator's
     present site in Mulberry, Florida, all as described in that certain
     Proposal number 89-IPQ-336A dated August 29, 1990 delivered by Nordion to
     Vindicator (the "Proposal"). In addition, Nordion shall provide to
     Vindicator the services set forth in Paragraph 5 of this Agreement. The
     total purchase price to be paid by Vindicator to Nordion for the
     Irradiator, Source and the services to be provided by Nordion under this
     Agreement shall be $2,867,510 ($Canadian), such amount to be paid as
     provided in Paragraph 3 of this Agreement.

          2. The parties acknowledge that Nordion accepted Vindicator's firm
     purchase order for the Irradiator and the Source, all pursuant to the
     Proposal, on September 5, 1990 (such date being referred to herein as the
     "Acceptance Date"). This Agreement supplements that arrangement.

          3. The purchase price of $2,867,510 ($Canadian) shall be paid as
     follows:

               (a) the parties acknowledge that $126,000 ($Canadian) of the
          total purchase price has already been paid, leaving a balance as of
          the date hereof of $2,741,510 ($Canadian);

               (b) an additional $295,000 ($U.S.) shall be paid by Vindicator,
          in cash, on the Acceptance Date, and shall be applied against the
          balance of the Purchase Price based on the $U.S.-Canadian exchange
          rate as of the Acceptance Date;

               (c) the balance of the purchase price shall be paid at the time
          and in the manner described in Paragraph 4.

          4. (a) The amount referred to in Paragraph 3(c) shall be due and
     payable in full on the date forty-eight (48) months from the Acceptance
     Date (the "Due Date"). Such amount shall not bear any interest until the
     Due Date, whereupon such amount shall bear interest at the rate of three
     percentage points above the "prime rate" for similarly sized commercial
     obligations as published from time to time in the Wall Street Journal.

               (b) Payment of any amount due under this Paragraph 4 shall be
          secured by a first, preferred security interest in the Irradiator and
          the Source to be granted to Nordion upon or before sale or delivery of
          the Irradiator and the Source. In addition; in the event that any
          other assets of Vindicator are at any time subject to any other
          security interest, then simultaneously with the granting of such
          security interest Nordion shall be granted a subordinate security
          interest in such assets. Any security interest granted hereunder to
          Nordion shall be granted by way of a security agreement in
          substantially the same form as is attached hereto as Exhibit A. Upon
          or before consummation of the transaction to which any such security
          interest relates, proper opinions and security filings must be
          effected (at Nordion's expense) as to each security interest granted
          hereunder.

               (c) Vindicator shall be deemed in default of its payment
          obligation under this Paragraph 4 upon the occurrence of any of the
          following:

                    (i) Any amount owed hereunder not being paid in full when
               due; or

                    (ii) The irradiation by Vindicator, at the Facility, of any
               product, other than food or related products including packaging
               materials, for any customer who, to the knowledge of Vindicator
               after consultation with Nordion, had previously had any similar
               product irradiated by gamma radiation by another commercial
               irradiator then willing and able to provide such service and both
               now and then being supplied or otherwise serviced by Nordion
               (this shall not, however, preclude Vindicator from conducting
               research and development activities on any product for any
               customer); or

                    (iii) Any act of bankruptcy or insolvency by Vindicator.

               (d) Option is given to Vindicator to pay part or the entire
          principal sum due under this Paragraph 4 remaining unpaid at any time
          without penalty.

               (e) Nordion may, at its option, at any time, forgive any part or
          all of the amount owed under this Paragraph 4.

               (f) Vindicator shall use its best efforts to pay down the balance
          of the purchase price during the 48-month interest-free period prior
          to the Due Date, and in any event not later than the Due Date. Its
          best efforts win include deferring payment of dividends, reasonably
          conservative policies on salaries, bonuses or other remuneration and
          any other distribution of any kind to shareholders or employees.

     5. Pending completion of the Facility and the commencement of the operation
thereof, Nordion will provide to Vindicator, and to Vindicator's architects and
engineers, irradiator building construction drawings, plans and specifications
for the Facility. Nordion will act as Vindicator's consultant in connection with
Vindicator's applying for and obtaining all necessary licenses and permits for
the Facility. Nordion will further act as Vindicator's consultant in its
selection and training of operating and management personnel for the Facility,
and provide all plant operation and radiation safety training for all Facility
personnel during the Facility's initial period of operation. In addition,
Nordion will assist Vindicator in its other technical and marketing efforts.

     6. This Agreement shall be governed by the laws of the State of Florida.

     IN WITNESS WHEREOF, the parties have executed this Agreement the day and
year first above written.

                                          VINDICATOR OF FLORIDA, INC.

                                          By: /s/ Sam R. Whitney, President

                                          NORDION INTERNATIONAL INC.

                                          By:



                               SECURITY AGREEMENT

     THIS SECURITY AGREEMENT (this "Agreement") is made and entered into by and
between NORDION INTERNATIONAL INC., a Canadian corporation (hereinafter "Secured
Party"), having a principal place of business in Kanata, Ontario, Canada, and
VINDICATOR OF FLORIDA, INC (hereinafter "Debtor"), having a principal place of
business in Plant City, Florida.

     1. Security Interest. Debtor is indebted to Secured Party under that
certain Financing Agreement dated September 5, 1990 in an amount determined
thereunder (the "Debt"). Debtor hereby grants to Secured Party a security
interest in and agrees and acknowledges that Secured Party, without further
action on its part, has and shall continue to have a continuing security
interest in all of the "Collateral" (as defined in Section 2 below), to secure
payment of the Debt.

     2. Collateral. For the purposes of this Agreement, the term "Collateral"
shall mean all of the assets described on Exhibit A hereto.

     3. Warranties. Debtor hereby represents, warrants, covenants and agrees to
and with Secured Party that:

                (a) Except for the security interest granted hereby Debtor is
       the owner of the Collateral free from any lien, security interest or
       encumbrance, and Debtor will defend the Collateral claiming the same or
       any interest therein.

               (b) Debtor will perform all of the covenants of debtor under or
          with respect to the Debt and Debtor will perform all of Debtor's
          covenants under all documents executed by Debtor pursuant thereto.

               (c) In the event Debtor defaults with respect to any of its
          covenants hereunder, Secured Party may proceed against such security
          or guarantors as Secured Party has with respect to the Debt, in such
          fashion and in such order as Secured Party may desire and Secured
          Party shall not be deemed to have waived any of its security rights or
          other rights by virtue of the order or fashion in which it elects to
          realize on the various security interests or guaranties which it has
          to secure the Debt or by virtue of bringing any action to realize on
          any of the various security interests.

               (d) If Debtor executes this Agreement as a corporation or if
          Debtor is in fact or law a corporation, Debtor warrants it is a duly
          organized and existing Florida corporation, in good standing and duly
          licensed to operate its business. The execution hereof and of any
          document in connection herewith and the consummation of the
          transactions herein contemplated do not violate any provisions of its
          Charter or By-laws or any contract and have or will be duly authorized
          and approved by its Board of Directors and Stockholders.

     4. Default and Remedies. Upon the happening of any of the following events
or conditions, namely: (1) default in the payment or performance of any of the
obligations secured hereby, of any covenant or liability contained or referred
to herein, or any note or other instrument evidencing any of the Debt, or in any
guaranty thereof; (2) any warranty, representation or statement made or
furnished to Secured Party by or on behalf of Debtor in connection with this
Agreement or to induce Secured Party to lead monies to Debtor proves to have
been false in any respect when made or furnished; (3) any substantial theft,
loss, damage or destruction of any of the Collateral, or any sale, transfer,
lease, disposition or encumbrance to or of any of the Collateral, or the making
of any levy, seizure or attachment thereof or thereon; (4) death, dissolution,
termination of existence, insolvency, business failure, appointment of receiver
for Debtor or any of the Collateral or any part of the property of Debtor, or
any material assignment for the benefit of the creditors by, or the commencement
of any proceedings under any bankruptcy or insolvency laws by or against,
Debtor; or (5) Secured Party in good faith believes that the prospect of payment
or performance by Debtor is impaired and deems itself insecure; thereupon or at
any time thereafter, such defects not having previously been cured, Secured
Party at its option may declare all of the Debt secured hereby to be immediately
due and payable and shall then have the remedies of a secured party under the
Florida Uniform Commercial Code or other applicable law, including without
limitation the right to take possession of the Collateral, and for that purpose
Secured Party may, so far as the Debtor can give authority therefor, enter upon
any premises on which the Collateral or any part thereof may be situated, and
remove the same therefrom or render the same unusable or store the Collateral on
Debtor's premises for a reasonable time without rent or cost to Secured Party.
Secured Party may require Debtor to gather the Collateral and to make it
available to Secured Party at a place to be designated by Secured Party which is
reasonably convenient to both parties. If any notice need be given, it will be
reasonable for Secured Party to give Debtor five (5) days prior written notice
of the time and place of any public sale or of the time after which any private
sale or any other intended disposition is to be made. Expenses of retaking,
holding, preparing for sale, selling or the like, including Secured Party's
reasonable attorney's fees and other costs and expenses, will be paid by Debtor,
including all costs and attorneys fees incurred in any appeal.

     5. General. This Agreement and the security interest in the Collateral
created hereby shall terminate only when the obligations hereby secured have
been paid in full. No waiver by Secured Party of any default shall be effective
unless in writing nor operate as a waiver or any other default or of the same
default on a future occasion. To the extent that Debtor's obligations are now or
hereafter secured by property other than the Collateral or by the guarantee,
endorsement or property of any other person, firm or corporation, then Secured
Party shall have the right in its sole discretion to determine which rights,
securities, liens, security interests or remedies it shall at any the pursue,
relinquish, subordinate or modify, or take any other action with respect thereto
without in any way modifying or affecting any of them or any of its rights
hereunder. Until default, Debtor may have possession of the Collateral and use
the same in any lawful manner not inconsistent with this Agreement. Debtor will
not mortgage, pledge or hypothecate its property or assets of any kind to anyone
except to Secured Party or otherwise sell or dispose of any of its property or
assets of any kind except in the normal course of its business. Debtor waives
notice of non-payment, presentment, demand, protest or notice thereof as to any
accounts or airy securities or instruments or notes relating thereto, or
otherwise except as specified herein. All rights and remedies herein are
cumulative and not alternative. This Agreement contains the entire agreement of
the parties and neither shall be bound by anything not expressed herein. All
notices to either party shall be given by certified mail, postage prepaid, at
the address first mentioned. Whenever used herein, the singular number shall
include the plural, the plural the singular, and the use of any gender shall
include all genders. All debtors hereto are bound jointly and severally.

         DATED this 5th day of September, 1990.

ATTEST:                                   VINDICATOR OF FLORIDA, INC.

                (Corporate Seal)

/s/ Walter H. Harkala                     By:/s/ Sam R. Whitney
- -------------------------------              -------------------------------
                    , Secretary              Sam. R. Whitney, President

ATTEST:                                   NORDION INTERNATIONAL INC.

                (Corporate Seal)

/s/                                       By:/s/
- -------------------------------              -------------------------------
                    , Secretary                               , President


<PAGE>

                                    EXHIBIT A

                                   COLLATERAL

One Pallet Type Gamma Irradiator as illustrated in Drawing No. B700001-353,
Issue D, Sheets 1 and 2, including all related mechanisms, conveyors, carriers,
control console, meters, manuals, computerized irradiator monitoring system,
spare parts, pool water de-ionizer, emergency source cooling sprinkler system
and safety interlock systems;

On Red Acrylic Dosimetry System, Type BC-2, as described in Specification RAD LS
117/107, including 2,000 pellets;

One Compu-Dose System, including 500 ceric cerous dosimeters;

400,000 curies of Cobalt-60 doubly sealed in standard Nordion capsules, Model
C-188;

And all other items that are personal property supplied by Nordion International
Inc. to Vindicator of Florida, Inc. under Nordion's P.S. No. 58463D.

                                                   NORDION INTERNATIONAL INC.

                                                  /s/ W.P. O'Neill
                                                  ----------------------------
                                         by:       W.P. O'Neill, President & CEO

                                                   VINDICATOR OF FLORIDA INC.

                                                  /s/ Sam R. Whitney, President
                                                  ----------------------------
                                         by:




THE DEBENTURE REPRESENTED BY THIS CERTIFICATE AND SHARES INTO WHICH THE
DEBENTURE IS CONVERTIBLE ARE BEING ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW
TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SALE OR
DISPOSITION THEREOF MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
RELATED THERETO OR AN OPINION OF COUNSEL FOR THE COMPANY THAT SUCH REGISTRATION
IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933.

                           VINDICATOR OF FLORIDA, INC,
                     SUBORDINATED DEBENTURE DUE JULY 1, 1993

Date of Issue:   July 1, 1991                                      $ 300,000.00
                 ------------

     VINDICATOR OF FLORIDA. INC a Florida corporation (the "Company"), for value
received, hereby promises to pay to MDS Health Group Inc., a Delaware
corporation, or assigns, (the "Holder") the principal sum of $300,000.00 (Three
Hundred Thousand Dollars and 00/100) Dollars on July 1, 1993.

Covenants
- ---------

     The Company covenants to, and agrees with the Holder that it will:

          (i) maintain its properties in good condition, repair and working
          order and make all necessary repairs and replacements as in the
          judgment of the Company may be necessary to carry on and conduct its
          business;

          (ii) at all times keep properties which are of an insurable nature
          insured with insurers believed by the Company to be responsible
          against loss or damage to the extent that property of similar
          character is usually so insured by corporations similarly situated and
          owning like properties;

          (iii) pay or discharge or cause to be paid or discharged, before the
          same shall become delinquent, (1) all taxes, assessments and
          governmental charges levied or imposed upon it or upon any of its
          income, profits or property, and (2) all lawful claims for labor,
          materials and supplies which, if unpaid, might by law become a lien
          upon its properties; provided, however, that the Company shall not be
          required to pay or discharge any tax, assessment, charge or claim
          whose amount, applicability or validity is being contested in good
          faith by appropriate proceedings.

     The Indebtedness evidenced by this Debenture shall be subordinate and
subject in right of payment to the prior payment in full of all presently
existing and subsequently incurred loans from banks, and/or financial
institutions and shall be secured by a second, preferred security interest in
the gamma radiation processing pallet irradiator and initial radiation source of
Cobalt-60 being sold to Vindicator by Nordion International, Inc., which holds
the first secured position,

Conversion
- ----------

     Holder shall have conversion rights (the "Conversion Rights") as follows:

     (i) At the option of Holder, all or any part of the principal amount of
this Debenture may be converted into fully paid and non-assessable shares or
Common Stock of the Company, at the conversion rate of one fully paid and
nonassessable share of Common Stock for that amount of Debenture which is equal
to the lesser of $4.50 or ten percent (10%) less than the closing per share
market price of the Company's Common Stock on the day prior to the date tendered
for conversion ("Conversion Rate"). If no market exists on the day prior to the
date tendered, then the closing price on the last date on which trading was
conducted will be used. Fractional shares will not be issued.

     (ii) Before Holder shall be entitled to convert this Debenture or a part
hereof into shares of Common Stock, the Holder shall surrender the Debenture to
the Company at its offices at the address set forth herein (or at such other
address of which the Company shall have notified the Holder in writing), and
shall give written notice to the Company at such offices that Holder elects to
convert the Debenture and stating if the Debenture is to be converted in part,
the amount thereof so to be converted. Such notice shall also state the name or
names (with address or addresses) in which the certificate or certificates for
shares of Common Stock issuable upon such conversion shall be issued and shall
contain such representations as may reasonably be required by the Company to the
effect that the shares to be received upon conversion are not being acquired for
distribution and will not be transferred in any way that might violate the then
applicable laws. As promptly as practicable after the receipt of such notice and
the surrender of the Debenture or part thereof as aforesaid, the Company shall
issue and shall deliver to Holder at the address specified by the Holder as set
forth herein a certificate or certificates for the number of shares issuable
upon the conversion of the Debenture or part thereof in accordance with the
provisions hereof. Such conversion shall be deemed to have been effected at the
close of business on the date on which such notice shall have been received at
the office of the Company and the Debenture shall have been surrendered in whole
or in part as aforesaid (the "Conversion Date"), and at such time the rights of
Holder as obligee shall cease with regard to that portion of the Debenture
surrendered for conversion and the person or persons in whose name or names any
certificate or certificates for shares of Common Stock shall be issuable upon
such conversion shall be deemed to have become the holder or holders of record
of the shares of Common Stock represented thereby to the extent of such
conversion. All certificates issued upon the exercise of the conversion shall
contain a legend governing restrictions upon such shares imposed by law. The
Company shall return to the Holder any Debenture converted in part with an
appropriate notation endorsed thereon evidencing such partial conversion.

     (iii) In the event the Company at any time or from time to time after the
Closing Date effects a subdivision or combination of its outstanding Common
Stock into a greater or lesser number of shares or grants a dividend payable in
Common Stock of the Company, then and in each such event the Conversion Rate
shall be increased or decreased proportionately.

     (iv) The Company shall at all times reserve and keep available out of its
authorized but unissued shares of Common Stock solely for the purpose of
effecting the conversion of this Debenture such number of its shares of Common
Stock as shall from time to time be sufficient to effect the Conversion of this
Debenture; and if at any time the number of authorized but unissued shares of
Common Stock shall not be sufficient to effect such conversion, the Company will
take such corporate action as may, in the opinion of its counsel, be necessary
to increase its authorized but unissued shares of Common Stock to such number of
shares as shall be sufficient for such purpose.

Consolidation or Merger
- -----------------------

     The Company shall not consolidate or merge into, or transfer or lease
all or substantially all of its assets to, any person unless:

     (i) The person assumes all the obligations of the Company under this
     Debenture, including but not limited to the due and punctual payment of the
     principal of this Debenture; and

     (ii) Immediately after the transaction no Event of Default exists.

The surviving entity, transferee or lessee shall be the successor Company, but
the predecessor Company in the case of a transfer or lease shall not be released
from the obligation to pay the principal of this Debenture.

Default
- -------

     An "Event of Default" occurs if:

     (i) The Company defaults in the payment of the principal of this Debenture
     when the same becomes due and payable at maturity;

     (ii) The Company fails to comply with any of its other agreements in this
     Debenture and the failure continues for a period of sixty (60) days after
     notice in writing to the Company from the holder of this Debenture,
     specifying such failure and demanding that such failure be remedied;

     (iii) The Company commences a voluntary case in bankruptcy, consents to the
     entry of any order for relief against it in an involuntary case in
     bankruptcy, consents to the appointment of a custodian of it or for all or
     substantially all of its property, or makes a general assignment for the
     benefit of its creditors under any federal or state bankruptcy law or other
     similar provision for the relief of debtors; or

     (iv) A court of competent jurisdiction enters an order or decree under any
     federal or state bankruptcy law, or other similar provision for the relief
     of debtors, for relief against the Company in an involuntary bankruptcy
     case, appoints a custodian of the Company or for all or substantially all
     of its property, or orders the liquidation of the Company and the order or
     decree remains unstayed and in effect for sixty (60) days.

     If an Event of Default shall occur and be continuing, the principal hereof
may be declared due and payable by notice to the Company in writing. Upon such
declaration the principal of this Debenture shall be due and payable
immediately.

     If an Event of Default occurs and is continuing, the holder of this
Debenture may pursue any available remedy or collect the payment of principal on
this Debenture or to enforce the performance of any provision of this Debenture.
A delay or omission by the holder of this Debenture in exercising any right or
remedy accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default. All remedies are
cumulative to the extent permitted by law. In any suit for the enforcement of
any right or remedy under this Debenture, a court in its discretion may require
the filing by any party litigant in the suit of an undertaking to pay the costs
of the suit, and the court in its discretion may assess reasonable costs,
including reasonable attorneys' fees, against any party litigant in the suit,
having due regard to the merits and good faith of the claims or defenses made by
the party litigant.

Transferability
- ---------------

     This Debenture is not transferable without the consent of the Company,
except to a subsidiary or affiliate of MDS.

Notice
- ------

     Any notice or communication by the Company to the Holder shall be mailed by
first-class mail to the address as shown on below. If a notice or communication
is mailed in the manner provided above within the time prescribed, it will be
deemed duly given, whether or not the addressee receives it.

     The Company's address is:

                  Vindicator of Florida, Inc.
                  1801 Thonotosassa Road - Suite 3
                  Plant City, Florida 3356

     The Company may change its address by providing written notice or such
change to the Holder.

     The Holder's address is:

                  MDS Health Group Inc.
                  100 International Boulevard
                  Toronto, Canada M9W6J6

     The Holder may change its address by providing written notice of such
change to the Company.

General
- -------

     No recourse shall be had for the payment of the principal of this Debenture
or for any claim based hereon or otherwise in respect hereof against any
shareholder, officer or director, as such, past, present or future, of the
Company, whether by virtue of any constitutional provision, statute or rule of
law or equity, or by the enforcement of any assessment or penalty or otherwise,
all such liability being, by the acceptance hereof and as part of the
consideration for the issue hereof, expressly waived and released by the Holder
hereof.

     The laws of the State of Florida shall govern this Debenture.

     IN WITNESS WHEREOF Vindicator of Florida, Inc., has caused this Debenture
to be executed in its corporate name by the President, and has caused its
corporate seal to be imprinted hereon and attested by the Secretary.


Dated: July 1, 1991                         VINDICATOR OF FLORIDA, INC.
       -------------


                                            By:  /s/ Sam R. Whitney
                                                 -------------------------------
                                                  President


(Seal)

ATTEST:


By:  /s/ Walter H. Harkala
- --------------------------------
      Secretary



                                    AGREEMENT

     This Agreement entered into this 9th day of July, 1991 by and
between Vindicator of Florida, Inc. ("Vindicator") and MDS Health Group Inc., a
Delaware corporation ("MDS").

     WHEREAS MDS Health Group Limited, a Canadian corporation and parent company
of MDS, is in the process of negotiating for the purchase of Nordion
Intentional, Inc., a Canadian corporation and,

     WHEREAS Nordion has entered into an agreement with Vindicator whereby
Vindicator has agreed to pay to Nordion $2.1 million dollars (US), without
interest, on September 5, 1994 and,

     WHEREAS MDS has agreed, in a separate agreement, to loan to Vindicator
$300,000 (US), such loan to be evidenced by a $300,000 Convertible Subordinated
Debenture dated July 1, 1991 ("Debenture").

     In consideration of NMS's agreement to the purchase of the Debenture,
Vindicator hereby agrees as follows:

     In the event MDS acquires a controlling interest in Nordion, by way of a
stock or asset purchase agreement, Vindicator will grant to RDS or Nordion the
right to convert the $2.1 million indebtedness at any time prior to the due date
into shares of Common Stock of Vindicator at the conversion rate of one fully
paid and non-assessable share of Common Stock for each $4.50 of such
indebtedness. Fractional shares shall not be issued.

     In the event the Company at any time or from time to time after the Closing
Date effects a subdivision or combination of its outstanding Common Stock into a
greater or lesser number of shares or grants a dividend payable in Common Stock
of the Company, then and in each such event the Conversion Rate shall be
increased or decreased proportionately.

     The Company shall at all times reserve and keep available out of its
authorized but unissued shares of Common Stock solely for the purpose of
effecting the conversion of the aforesaid indebtedness such number of its shares
of Common Stock as shall from time to time be sufficient to effect the
Conversion of such indebtedness; and if at any time the number of authorized but
unissued shares of Common Stock shall not be sufficient to effect such
conversion, the Company will take such corporate action as may, in the opinion
of its counsel, be necessary to increase its authorized but unissued shares of
Common Stock to such number of shares as shall be sufficient for such purpose.

                                                     VINDICATOR OF FLORIDA, INC.

                                                     By: /s/ Sam R. Whitney
                                                        ------------------------
Accepted By:

/s/
- --------------------------------
MDS Health Group Inc.




                           VINDICATOR OF FLORIDA, INC.

                           ---------------------------

                             SUBSCRIPTION AGREEMENT

Gentlemen:

Re:      Convertible Subordinated Debenture.

         The undersigned hereby subscribes for a Convertible Subordinated
Debenture ("Debenture") in the principal amount of $300,000 of Vindicator of
Florida, Inc. (the "Company"), a Florida corporation. In consideration of your
acceptance of this Subscription Agreement, the undersigned hereby agrees,
represents and warrants as follows:

     1. Payment for Debenture. Simultaneously with the execution and delivery of
this Subscription Agreement, the undersigned is delivering to you $300,000,
which represents the purchase price of the Debenture for which the undersigned
has subscribed.

     2. Receipt of Reports. The undersigned hereby acknowledges receipt of a
copy of the Company's Prospectus dated November 14, 1990, Form 10-K Report for
the year ended December 31, 1990, Form 10-Q Report for the quarter ended March
31, 1990 and an Information Statement dated June 14, 1991 (the "Reports'). All
terms used herein shall have the meanings given to such terms in the Reports,
unless the context herein indicates otherwise.

     3. Agreement Not to Sell Debenture of Underlying Shares. The undersigned
hereby agrees not to sell, hypothecate or otherwise dispose of the Debenture or
Underlying Shares unless (1) such Debenture or Underlying Shares have been
registered for sale under the Securities Act of 1933, as amended (the "Act") and
under applicable state law, or (2) in the opinion of counsel for the Company, an
exemption from the registration requirements of the Act and applicable state law
is available.

     4. Acknowledgement. The undersigned hereby acknowledges and understands
that:

          (i) The Company will rely upon the information set forth herein.

          (ii) An investment in the Debenture is speculative in nature.

          (iii) No federal or state agency has made any finding or determination
     as to the fairness of the offering of the Debenture, or any recommendation
     or endorsement of the Debenture. The undersigned acknowledges that the
     Debenture is being purchased for investment and not for distribution or
     resale to others. The undersigned acknowledged that the Company has made
     available the opportunity to ask questions and receive answers concerning
     the terms and conditions of the offering and to obtain any additional
     information which the Company possesses or could acquire without
     unreasonable effort or expense that is necessary to verify the information
     provided in the Reports referenced in paragraph 2 above,

          (iv) The Debenture has not been registered under the Act or under any
     state securities laws and thus the undersigned must bear indefinitely the
     economic risk of any investment in the Debenture or Underlying Shares
     because the Debenture or Underlying Shares may not be resold or otherwise
     transferred for value unless subsequently registered under the Act or
     unless an exemption from such registration is available. Further, there is
     no present public market for the Debenture and no such market for the
     Debenture is expected to develop.

          (v) Any transferee of this Debenture may be required by the Company to
     fulfill the investor suitability standards applied to the undersigned.

     5. Representations and Warranties. The undersigned hereby represents and
warrants as follows:

     (i) The Debenture is being acquired without having relied upon any offering
literature other than the Reports described in paragraph 2 above.

     (ii) The Company has made available all documents relating to an investment
in the Company and has provided answers to all questions concerning the
offering. In evaluating the suitability of an investment in the Company, the
undersigned has not relied upon any representations or other information
(whether oral or written) other than referred to in paragraph 2 above.

     (iii) The officers of the undersigned have sufficient knowledge and
experience in financial and business matters to be capable of evaluating the
merits and risks of this investment.

     (iv) The undersigned is a corporation, organized pursuant to Delaware law,
with its principal office located in Williamsville, New York.

     6. Construction. This Agreement shall be construed in accordance with the
laws of the State of Florida.

     7. Execution Authorized. The person executing this Subscription Agreement
on behalf of the subscribing corporation, personally and in his individual
capacity, hereby represents and warrants that he has been duly authorized to
execute this Subscription Agreement and all other instruments in connection with
the purchase of the Debenture, and that the signature of the undersigned is
binding upon such corporation.

     IN WITNESS WHEREOF, I have caused this Subscription Agreement to be duly
executed as of the 11th day of July, 1991.

                                                     MDS HEALTH GROUP INC


                                                     By: /s/
                                                        ------------------------
                                                          (Vice) President

ATTEST:
/s/                                                      /s/
- -----------------------------                           ------------------------
 (Asst.) Secretary                                         (Vice) President


                                                 Subscriber's Name and Residence
                                                 Address (please print or type)

                                                 MDS Health Group Inc.
                                                 -------------------------------
                                                 100 International Blvd.
                                                 -------------------------------
                                                 Etobicoke, Ontario,
                                                 -------------------------------
                                                 Canada M9W6J6
                                                 -------------------------------

                                                 Taxpayer ID/Social Security No:

                                                 -------------------------------


                                                 Mailing Address (if
                                                 different from above):

                                                 -------------------------------

                                                 -------------------------------

                                                 -------------------------------





Accepted:

Vindicator of Florida

By:    /s/ Sam R. Whitney
      -------------------------------
                 7-19-91
      -------------------------------
                        DATE



                         MORTGAGE AND SECURITY AGREEMENT

     THIS MORTGAGE AND SECURITY AGREEMENT (this "Mortgage") is made and entered
into as of the 22nd day of October, 1991, by and between Vindicator, Inc. of
Hillsborough County, Florida, hereinafter called Mortgagor; and Nordion
International, Inc., a Canadian corporation hereinafter called Mortgagee;

                              W I T N E S S E T H:
                              --------------------

     Mortgagor, in consideration of the sum of Ten Dollars ($10.00) and other
good and valuable consideration to Mortgagor paid by Mortgagee, the receipt and
sufficiency of which are hereby acknowledged, does hereby grant, bargain, sell,
assign, transfer, convey and confirm unto Mortgagee that certain parcel of real
property situate in Hillsborough County, Florida, and described as follows:

     A parcel of land being in the SW1/4 of Section 2, TOWNSHIP 30 SOUTH, RANGE
     23 EAST, Polk County, Florida, being more particularly described as
     follows:

     Commence at the Southwest corner of said Section 2; thence North 00o07'56"
     West along the West line of said SW1/4 a distance of 1614.06 feet to the
     South line of the North 990 feet of said SW1/4; thence North 88o34'0" East
     along said South Line and parallel with the North line of said SW1/4 a
     distance of 1643.3 feet to the point of beginning; thence South 01o26'00"
     East, 360.00 feet; thence North 88o34'00" East parallel with said North
     line of the SW 1/4 a distance of 317.31 feet to the point of Curvature of a
     curve concaved Northwesterly having a radius of 570.00 feet, a central
     angle of 18o51'00", a chord bearing of North 79o08'30" East, and a chord
     distance of 186.68 feet; thence Northeasterly along said curve 187.53 feet
     to the point of Tangency; thence North 69o43'00" East, 56.11 feet to point
     of Curvature of a curve concaved Northwesterly having a radius of 30.00
     feet, a central angle of 90o00'00", a chord bearing of North 24o43'00"
     East, and a chord distance of 42.43 feet; thence Northeasterly along said
     curve 47.12 feet to the point of Tangency, said point being on the Westerly
     right of way line of Prairie Mine Road; thence North 20o17'00" West along
     said right of way line 288.70 feet to said South line of the North 990 feet
     of said SW1/4; thence South 88o34'00" West along said South line and
     parallel with said North line of the SW1/4 a distance of 480.00 feet to the
     point of beginning

(the "Land"); together with all plants of every kind now growing or that may be
hereafter growing on or upon the Land; all buildings, structures and other
improvements now on or hereafter placed or constructed on the Land; all
fixtures, furniture, furnishings, equipment, appliances and all other personalty
now on the Land or that may hereafter be erected or placed thereon or acquired
therefor, including, but not limited to, all heating, fighting, plumbing,
ventilating, refrigerating, air conditioning, sprinkling, water and power
systems, appliances and fixtures; all windows and doors, screens, awnings,
window shades, bath tubs, sinks, toilets, basins, mirrors, refrigerators, hot
water

This instrument was prepared by:
Bonnie J. Pinzel
One Tampa City Center, Suite 2700
Tampa, Florida 33602

heaters and ranges; and all substitutions and replacements of or for any of
the foregoing and all proceeds thereof, including insurance proceeds; together
with all rents, issues, income and profits from any and all of the foregoing, a
of which are hereby specifically assigned and pledged to Mortgagee as security
for the payment of all debt herein referred to and Mortgagor's Performance of
all of Mortgagor's covenants and agreements herein contained.

     Mortgagor also hereby grants, assigns, transfers and conveys to Mortgagee
all and singular the ways, easements, riparian and other rights, and all
tenements, hereditaments and appurtenances belonging to the Property or in
anywise appertaining thereto.

     Mortgagor hereby grants to Mortgagee a mortgage and a security interest in
all of the Property and in addition to the rights of a mortgagee. Mortgagee
shall have all rights of a secured party under the Florida Uniform Commercial
Code.

     TO HAVE AND TO HOLD the Property unto Mortgagee forever.

     Mortgagor hereby covenants with Mortgagee that Mortgagor is indefeasibly
seized with the absolute and fee simple title to the Property; that Mortgagor
has full power and lawful authority to sell, convey, assign, transfer and
mortgage the same; that it shall be lawful for Mortgagee at any time hereafter
peaceably and quietly to enter upon, have, hold and enjoy the Property and every
part thereof.

     Mortgagor covenants that Mortgagor, at Mortgagor's own expense, will
execute such other and further instruments and assurances to vest absolute and
fee simple title to the Property in Mortgagee that may be requested by
Mortgagee; and that Mortgagor will warrant and defend the title to the Property
unto Mortgagee against the lawful claims and demands of all persons whomsoever.

     This Mortgage and Security Agreement is given to secure to Mortgagee any
payment, up to $600,000, to be made by Mortgagor to Mortgagee pursuant to a
Reimbursement and Indemnity Agreement dated October 22, 1991 by and between
Mortgagor and Mortgagee whereby Mortgagor has agreed to indemnify Mortgagee
against any payment, up to $600,000, required to be made by Mortgagee to ACSTAR
Insurance Company ("ACSTAR") pursuant to an indemnity agreement being entered
into by Mortgagee with ACSTAR to secure a License and Permit Bond between
Mortgagor and Acstar for the benefit of the State of Florida, in the amount of
$600,000. As of the date hereof, the sum of $4,500 has been advanced by
Mortgagee in connection with such License and Permit Bond and is secured hereby.

     Mortgagor hereby further covenants to pay all taxes and assessments levied
or assessed upon the Property before the same become delinquent, and in no event
to permit the Property, or any part thereof, to be sold for nonpayment of taxes
or assessments; to keep the Property in good repair and to permit, commit or
suffer no waste, impairment or deterioration thereof; to comply strictly with
all laws and governmental regulations and rules affecting the Property or its
operation; to pay all taxes that may be levied or assessed on this Mortgage or
the moneys secured hereby; to permit no mechanic's or other liens arising either
by contract or by law to be created or rest upon all or any part of the Property
for ten days without the same being paid or released and discharged of the
Property; and to pay all costs and expenses incurred or paid by Mortgagee in
collecting the moneys hereby secured or in enforcing or protecting the rights
and security of the Mortgagee hereunder, including reasonable attorney's fees
incurred out of court, at trial, on appeal, or in bankruptcy proceedings, in the
event this Mortgage and the liability be placed in the hands of an attorney for
collection.

     Mortgagor further covenants to keep the buildings, structures and other
improvements now or hereafter erected or placed on the Land and constituting a
part of the Property constantly insured against all loss or damage for the full
insurable value thereof for fire, windstorm and extended coverage in insurance
companies satisfactory to Mortgagee (but Mortgagee shall not be liable for the
insolvency or irresponsibility of any such companies), which policies shall
provide for not less than 10 days prior written notice of cancellation to
Mortgagee, and to pay promptly all premiums for such insurance, the policies
representing which shall be delivered to and held by Mortgagee as additional
security for the payment of the indebtedness and liability secured hereby. All
sums recoverable on any such insurance policies shall be made payable to
Mortgagee by a loss payable clause satisfactory to Mortgagee, to be attached to
such policies. In the event any such insurance policy shall expire during the
life hereof, Mortgagor agrees to procure and pay for renewal a thereof, with the
above requirements, replacing such expired policy, ten days prior to the
expiration date of such policy. In case of loss, Mortgagee is hereby authorized
to adjust and settle any claim under any such policy and Mortgagee is authorized
to collect and receipt for any such insurance money and to apply the same, at
Mortgagee's option, in reduction of the indebtedness hereby secured, whether due
or not, or to allow Mortgagor to use such insurance money, or any part thereof,
in repairing the damage or restoring the improvements or other property without
affecting the lien hereof for the full amount secured hereby.

     It is further covenanted that Mortgagee may (but shall not be obligated to)
advance moneys that should have been paid by Mortgagor hereunder in order to
protect the lien or security hereof, and Mortgagor agrees without demand to
forthwith repay such money, which amount shall bear interest from the date so
advanced until paid at the rate of twelve percent (12%) per annum and shall be
considered as so much additional indebtedness secured hereby; but no payment by
Mortgagee of any such moneys shall be deemed a waiver of any rights of Mortgage
hereunder.

     Mortgagor further covenants that granting any extension or extensions of
the time for payment of any part or all of the total indebtedness or liability
secured hereby, or taking other or additional security for payment thereof,
shall not affect this Mortgage or the rights of Mortgagee hereunder, or operate
as a release from any liability upon any part of the indebtedness hereby secured
or under any covenant herein contained.

     It is further covenanted and made of the essence hereof that in case of
failure to make any payment when due or default for thirty (30) days in the
performance of any of the other covenants herein on the part of Mortgagor, then
the Mortgagee may consider all unmatured indebtedness or liability secured
hereby, and accrued interest thereon, as immediately due and payable, without
demand and without notice or declaration, and Mortgagee shall have the right
forthwith to institute proceedings to enforce the collection of all moneys
secured hereby and/or to foreclose the lien hereof.

     It is further stipulated and agreed by and between the parties that
Mortgagee shall have the right to exercise any option or privilege herein given
or reserved and to enforce any duty of Mortgagor at any time without further or
other notice regardless of any prior waiver by Mortgagee or default of Mortgagor
or delay by Mortgagee in exercising any right, option, or privilege or enforcing
such duty of Mortgagor, and no waiver by Mortgagee or default of Mortgagor nor
delay of Mortgagee in exercising any right, privilege or option or in enforcing
any duty of Mortgagor shall be deemed, held, or construed to be a waiver or any
of the terms or provisions of this Mortgage or of any subsequent or continuing
default.

     Mortgagee agrees that Mortgagor may borrow up to $1,500,000 and secure such
borrowing with a prior mortgage on the Property. In this regard Mortgagee agrees
to subordinate its rights under this Mortgage and Security Agreement to such
lender.

     Mortgagor hereby waives all rights of homestead and exemption granted by
the Constitution and laws of Florida. All covenants and obligations of the
respective parties hereto shall extend to and be binding upon their respective
heirs, personal representatives, successors and assigns.

      IN WITNESS WHEREOF, Mortgagor has executed this Mortgage this 22nd day of
October, 1991.

      Signed, sealed and delivered in the presence of:

                                                  VINDICATOR, INC.

  /s/ Walter H. Harkala                           By: /s/ Sam R. Whitney
- ----------------------------                         ----------------------
 (LS) Walter H. Harkala                              Sam R. Whitney, President
      Secretary
 ---------------------------

STATE OF FLORIDA
COUNTY OF HILLSBOROUGH

        BEFORE ME, the undersigned authority, on this 22nd day of October, 1991,
personally appeared Sam R. Whitney, to me known, who, being by me duly sworn did
depose and say that he is the president of Vindicator, Inc., the corporation
that executed the Mortgage and Security Agreement, and that the same was
executed freely and voluntarily, for the uses and purposes therein expressed.

        WITNESS my hand and official seal the date aforesaid.


                                              ----------------------------------
                                                          Notary Public

                                                          My Commission Expires:



                      REIMBURSEMENT AND INDEMNITY AGREEMENT

     THIS REIMBURSEMENT AND INDEMNITY AGREEMENT is made and entered into as of
the 22nd day of October, 1991, by and between Vindicator, Inc., a Florida
corporation ("Vindicator"), and Nordion International, Inc., a Canadian
corporation ("Nordion").

     WHEREAS, Nordion has incurred certain expenses and obligations in
connection with a surety bond provided by ACSTAR Insurance Company, a
Connecticut corporation ("ACSTAR"), on behalf of Vindicator; and

     WHEREAS, Nordion has determined that it is beneficial to Nordion to assist
Vindicator in obtaining such surety bond; and

     WHEREAS, in consideration for such assistance, Vindicator has agreed to
reimburse and indemnify Nordion for all costs which it has or may incur in
connection with such surety bond.

     NOW, THEREFORE, in consideration of the foregoing premises and for other
good and valuable consideration, the sufficiency of which is hereby
acknowledged, Nordion and Vindicator do hereby agree as follows:

     1. Vindicator will pay or reimburse Nordion for all premiums paid or to be
paid to ACSTAR in connection with Surety Bond No. 2883 issued by ACSTAR to the
State of Florida in the sum of $600,000 (the "Surety Bond") and in connection
with any extension, replacement, renewal, or amendment from time to time of the
Surety Bond in accordance with paragraph 1 thereof.

     2. Vindicator will (a) indemnify and save Nordion harmless from and against
any and all liability, loss, costs, damages, fees of attorneys and other
expenses which Nordion may sustain or incur by reason of or in consequence of
the execution of an Indemnity Agreement from Nordion to ACSTAR dated as of
October 22nd 1991, or payments made by the Bank of Montreal on a letter of
credit in the amount of $450,000 furnished by the Bank to ACSTAR on behalf of
Nordion, each in connection with the issuance of the Surety Bond (collectively
called the "Indemnity Agreement") including but not limited to (i) sums paid or
liabilities incurred in settlement of and expenses paid or incurred in
connection with claims, suits or judgments under the Indemnity Agreement or the
Surety Bond, or (ii) expenses paid or incurred in enforcing the terms of this
Agreement or in procuring or attempting to procure release from liability in
connection with this Agreement, the Indemnity Agreement or the Surety Bond or in
recovering or attempting to recover losses or expenses paid or incurred as
aforesaid.

     3. The parties hereto acknowledge that this Agreement is secured by a
Mortgage and Security Agreement of even date herewith, which Mortgage and
Security Agreement will be filed in the public records of Polk County, Florida.

     4. Nordion agrees to notify Vindicator immediately upon receiving any
notice or knowledge that any claim or demand is made by ACSTAR against Nordion
in connection with the Surety Bond. Nordion also agrees to notify Vindicator
prior to paying any premium or making any other payment in connection with the
Surety Bond and to obtain Vindicator's consent prior to any extension of the
Surety Bond.

     5. This Agreement may be modified or amended only in writing executed by
the parties hereto.

       IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year set forth above.

                                  VINDICATOR, INC.

                                 By: /s/  Sam R. Whitney
                                    -----------------------------------
                                              Sam R. Whitney, President

                                 NORDION INTERNATIONAL, INC,

                                 By: /s/ W.P. O'Neill
                                    -----------------------------------
                                              W.P. O'Neill

                                 By: /s/ W.J. Moffat
                                    -----------------------------------
                                              W.J. Moffat
<PAGE>

Vindicator, Inc.
1801 Thonotosassa Road,
Plant City,
Florida,
USA

Attention:      Mr. Sam R. Whitney,
                President
Dear Sir:

Reference is made to the Reimbursement and Indemnity Agreement dated October 22,
1991 among Vindicator, Inc. and Nordion International Inc. governing, among
other things provision for the reimbursement and indemnity by Vindicator, Inc.
of sums paid out by Nordion International Inc. pursuant to an Indemnity
Agreement between Nordion and Acstar Insurance Company, dated October 22, 1991
and/or payments made by Nordion or its past bankers, the Bank of Montreal,
pursuant to a Letter of Credit in the amount of four hundred and fifty thousand
dollars ($450,000 US) dated October 22, 1991.

Nordion has recently been requested by the Bank of Montreal that it desires that
Nordion replace the above referenced Letter of Credit with one emanating from
its present banker, namely the Canadian Imperial Bank of Commerce. Therefore in
view of the foregoing Nordion requires an amendment to the Reimbursement and
Indemnity Agreement, dated 22 October, 1991.

In consideration of the mutual covenants contained herein the Parties agree as
follows:

i)   That any reference to "Bank of Montreal" or "Bank" in the Reimbursement and
     the Indemnity Agreement, dated October 22, 1991 shall be amended to read
     "Canadian Imperial Bank of Commerce".

Please signify your concurrence with the foregoing by executing in the
appropriate space set out below:

Dated this 3rd day of November, 1992.

Nordion International Inc:                  By:
                                               ---------------------------------
We concur with the foregoing

Vindicator Inc.                             By:  /s/ Sam R. Whitney
                                               ---------------------------------
                                                    Sam R. Whitney - President



                                    AGREEMENT

     This Agreement, made and entered into as of December 11th, 1991, by and
between Vindicator, Inc., a Florida corporation ("Vindicator") and Nordion
International, Inc., a Canadian corporation ("Nordion").

     WHEREAS, pursuant to a Financing Agreement dated September 5, 1990 between
Vindicator and Nordion, Nordion agreed to design, manufacture and install and
Vindicator agreed to purchase from Nordion a fully operational gamma radiation
processing pallet Irradiator (the "Irradiator"), complete with a radiation
source of 400,000 curies of Cobalt 60 (the "Source") at Vindicator's site
located in Mulberry, Florida. The total purchase price of the irradiator and
source was $2,500,000. Of such amount, $400,000 has been paid to date. See
Schedule A attached hereto.

     WHEREAS, pursuant to an agreement entered into July 9, 1991 between
Vindicator and MDS Health Group, Inc., ("MDS"), a Delaware corporation, MDS
loaned to Vindicator $300,000, which is evidenced by a $300,000 Convertible
Subordinated Debenture dated July 1, 1991 and due July 1, 1993. The debenture is
also convertible into shares of Common Stock of Vindicator at the rate of one
share of Common Stock for each $4.50 of such debenture. As part of such
agreement Vindicator agreed that, in the event MDS acquired a controlling
interest in Nordion by way of a stock or asset purchase agreement, Vindicator
would grant to MDS or Nordion the right to convert the $2.1 million indebtedness
owed by Vindicator to Nordion as described above at any time on or before
September 4, 1994 into shares of Common Stock of Vindicator at the conversion
rate of one fully paid and non-accessible share of Common Stock of Vindicator
for each $4.50 of such indebtedness. The acquisition by MDS of the controlling
interest in Nordion did, in fact, take place and as a result the total
outstanding indebtedness of $2,400,000 became convertible into Common Stock of
Vindicator at the aforesaid conversion rate.

     WHEREAS, Nordion proposes to make available to Vindicator an additional
$850,000 to satisfy Vindicator's cash flow requirements.

     WHEREAS, Nordion proposes to make available to Vindicator an additional
$1,000,000 in the form of additional curies of Cobalt 60 if requested by
Vindicator.

     NOW THEREFORE, the parties hereto agree as follows:

     1. $2.1 million dollar indebtedness to Nordion

     The conversion feature of the $2.1 million indebtedness to Nordion is
hereby amended to reduce the rate of conversion from $4.50 per share to $4.05
per share. All other terms and conditions of the indebtedness are to remain the
same.

     2. $.3 million dollar indebtedness to MDS

     The MDS Agreement dated July 9, 1991, the Subscription
Agreement and Debenture (attached hereto as Schedule B) are hereby amended to
change the conversion price of the Debenture from $4.50 to $4.05 and the
maturity date from July 1, 1993 to September 4, 1994. All other terms and
conditions of such agreements are to remain the same.

     3. $.850 million dollar Nordion commitment.

     Nordion agrees to provide to Vindicator an additional $850,000 on the
following terms:

     (a)  $100,000 immediately.

     (b)  $500,000 upon receipt by Nordion of satisfactory evidence that the
          license required by the State of Florida for the receipt of Cobalt 60
          has been received by Vindicator.

     (c)  $65,000 per month for three months, commencing February 1, 1992, and
          $55,000 on May 1, 1992, as needed by Vindicator and approved by
          Nordion, which approval will not be unreasonably withheld, after a
          mid-month review (commencing January 15, 1992) of material provided by
          Vindicator to Nordion and discussions with Vindicator's management.

     (d)  Any amount loaned by Nordion as set forth in (a) through (c) above
          shall be evidenced by a Debenture, the terms of which shall be the
          same as those set forth in the Debenture dated July 1, 1991 and
          attached as Schedule B except that the maturity date shall be
          September 4, 1994. In addition, such indebtedness shall also be
          secured by a first mortgage of the property on which Vindicator's
          plant is located. In this regard, a Mortgage and Security Agreement
          was previously entered into by Vindicator with Nordion whereby such
          property was pledged as security to secure any payment by Nordion up
          to $600,000 pursuant to a Reimbursement and Indemnity Agreement dated
          October 22, 1991 between Vindicator and Nordion.

     (e)  The Debenture(s) evidencing the indebtedness incurred hereunder shall
          be convertible by Nordion at any time on or before September 4, 1994
          into shares of Common Stock of Vindicator at the conversion rate of
          one share of Common Stock for each $4.05 of Debenture. Nordion will
          give Vindicator at least 90 days written notice prior to the due date
          of their intention of whether or not to exercise the conversion
          privilege.

     4. $1.0 million dollar facility/Cobalt 60.

     Nordion agrees to provide up to at least $1,000,000 worth of Cobalt 60 (at
the then fair value as charged by Nordion to its customers of similar quantity)
to Vindicator at Vindicator's request at any time on or before June 30, 1992.
The terms of such purchase, other than the purchase price, shall be the same as
set out in PS Number 58463 dated September 4, 1990 with respect to the initial
purchase by Vindicator from Nordion of 400,000 curies of Cobalt 60 and
equipment. Payment for such additional Cobalt 60 will be due without interest on
September 4, 1994 and the payable resulting from such shall be secured under the
same terms as set forth in Schedule A attached hereto. In addition, such
indebtedness shall be convertible at any time on or before September 4, 1994
into shares of Common Stock of Vindicator at the rate of $4.05 of indebtedness
for each share of Common Stock. Nordion will give Vindicator at least 90 days
written notice prior to the due date of their intention of whether or not to
exercise the conversion privilege.

     5. Upon disbursement of the $500,000 referred to in 3(b) above, Nordion
will have the right to designate two members to the Board of Directors of
Vindicator and such right shall continue for so long as any of the indebtedness
referred to herein is outstanding and/or Nordion owns in excess of 15% of
Vindicator's outstanding shares of Common Stock. Further, Vindicator agrees to
establish an executive committee consisting of no more than five members, of
which the two nominees of Nordion will be members.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the year
and date set forth above.

                                          VINDICATOR, INC.

                                          By: /s/ Sam R. Whitney
                                             -----------------------------------
                                                  Sam R. Whitney, President



                                          NORDION INTERNATIONAL, INC.


                                         By: /s/ Frank M. Fraser
                                            ------------------------------------
                                                 Frank M. Fraser



THE DEBENTURE REPRESENTED BY THIS CERTIFICATE AND SHARES IN THE DEBENTURE IS
CONVERTIBLE ARE BEING ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN
CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SALE OR DISPOSITION
THEREOF MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED
THERETO OR AN OPINION OF COUNSEL FOR THE COMPANY THAT SUCH REGISTRATION IS NOT
REQUIRED UNDER THE SECURITIES ACT OF 1933.


                                VINDICATOR, INC.
                   CONVERTIBLE DEBENTURE DUE SEPTEMBER 4, 1994


Date of Issue:  January 15,1992                                     $ 900,000.00
                                                                  (U.S. Dollars)


     VINDICATOR, INC. a Florida corporation (the "Company"), for value received,
hereby promises to pay to Nordion International, Inc., a Canadian corporation,
or assigns (the "Holder"), on September 4, 1994 (the "Due Date") the sum of
$900,000 U.S. (nine hundred thousand dollars) owing as of the date hereof, and
other sums to be paid by the Company to the Holder pursuant to loan advances
from time to time made to the Company by the Holder under the Agreement between
the Holder and the Company dated December 11, 1991. (Schedule A). Such amount
shall not bear any interest until the Due Date, whereupon such amount shall bear
interest at the annual rate of three percentage points above the "prime rate"
for similarly sized commercial obligations as published from time to time in the
Wall Street Journal. The Company shall have the right to pay part or the entire
principal sums due and payable at any time without penalty.

Covenants
- ---------

     The Company hereby warrants, covenants and agrees with the Holder that:

         (i) it will maintain its Mortgaged Properties, as herein defined, in
         good condition, repair and working order and make all necessary repairs
         and replacements as in the judgment of the Company may be necessary to
         carry on and conduct its business;

         (ii) it will at ail times keep Mortgaged Properties which are of an
         insurable nature insured with insurers believed by the Company to be
         responsible against loss or damage to the extent that property of
         similar character is usually so insured by corporations similarly
         situated and owning like properties;

         (iii) it pay or discharge or cause to be paid or discharged, before the
         same shall become delinquent, (1) all taxes, assessments and
         governmental charges levied or imposed upon it or upon any of its
         income, profits or Mortgaged Property, and (2) all lawful claims for
         labor, materials and supplies which, if unpaid, might by law become a
         lien upon its Mortgaged Properties; provided, however, that the Company
         shall not be required to pay or discharge any tax, assessment, charge
         or claim whose amount, applicability or validity is being contested in
         good faith by appropriate proceedings.

         (iv) it owns the Mortgaged Property and shall keep the Mortgaged
         Property free of all incumbrances other than permitted by this
         Debenture;

         (v) it will keep proper books, accounts and records covering all of its
         business and affairs on a current basis and to permit a representative
         of Holder at any time to inspect the Company's books of accounts,
         records and documents;

         (vi) it will pay all costs and expenses incurred (including legal fees)
         with respect to: (a) the filing of record of the Mortgage and Security
         Agreement dated as of January 15, 1992 attached hereto as Schedule B
         and Financing Statement under the Uniform Commercial Code; (b) the
         exercising of any or all of the rights, remedies and powers of the
         Holder under this Debenture, upon the occurrence of a default by the
         Company; (c) any or all of the taking of, recovering or possessing the
         Mortgaged Property and any other proceedings taken for the purpose of
         enforcing the remedies provided herein, including without limitation
         the appointment of a receiver whether by order of court or by private
         appointment, or otherwise in relation to the Mortgaged Property; and
         agrees that all such costs and expenses shall be payable by the Company
         to the Holder on demand.

Security
- --------

     The indebtedness evidenced by this Debenture is secured by a Mortgage and
Security Agreement dated as of January 15, 1992. Such Agreement provides that as
security for payment of the sums set out in this Debenture, and all other moneys
from time to time owing under this Debenture and the performance of the
covenants of the Company under this Debenture, the Company hereby provides,
sells, transfers, assigns, mortgages and charges (as the case may be) to and in
favor of the Holder:

     (i) Land. A first Mortgage on the real property of the Company as described
     and set out in the Mortgage and Security Agreement in favor of the Holder
     dated as of January 15, 1992 attached hereto as Schedule B;

     (ii) Improvements. All buildings, structures, betterments and other
     improvements of any nature now or hereafter situated, or intended to be
     situated, in whole or in part upon the Land, regardless of whether
     physically affixed or now or hereafter severed or capable of severance from
     the Land (the "Improvements").

     (iii) Personal Property and Fixtures. All of Mortgagor's personal property
     of every nature and fixture, including without limitation all furnishings,
     fixtures, machinery, tools and equipment used in, necessary for or related
     to the Mortgagor's facility, whether now or hereafter acquired or used in
     connection therewith and located thereon (the "Personal Property and
     Equipment").

     (iv) Accounts. All debts, accounts, claims, money and choses in action
     which are, or which at any time hereafter be due or owing to or owned by
     the Company, and also securities, mortgages, bills, notes, and other
     documents, now held or owned, or which may be hereafter taken, held or
     owned by or on behalf of the Company in respect of the said debts,
     accounts, claims, moneys and choses in action or any part thereof, and also
     all books, documents and papers recording, evidencing or relating to the
     said debts, accounts claims, moneys and choses in action or any part
     thereof (referred to in this Debenture as the "Accounts Receivable");

     (v) Easements or Other Rights. Together with ail easements, rights of way,
     gores of land streets, ways, alleys, passages, sewer rights, waters, water
     courses, water rights and powers, and all estates, rights, titles,
     interests, privileges, liberties, tenements, hereditaments and
     appurtenances whatsoever, in any way belonging, relating or appertaining to
     any of the Land and Improvements, or which hereafter shall in any way
     belong, relate or be appurtenant thereto, now owned or hereafter acquired
     by Mortgagor and the reversion and reversions, remainder and remainders,
     and all of the estate, rights, title, interests, property, possession,
     claim and demand whatsoever, at law as well as in equity, of Mortgagor, in
     and to the same, including but not limited to all judgments, awards or
     damages and settlements hereafter made resulting from condemnation
     proceedings or taking of the property described `in paragraphs (i), (ii),
     (iii) or (iv) hereof or any part thereof under the power of eminent domain,
     or for any damage (whether caused by such taking or otherwise) to the
     property described in paragraphs (i), (ii), (iii) or (iv) hereof or any
     part thereof, or to any rights appurtenant thereto.

     Everything referred to in paragraphs (i), (ii), (iii), (iv) or (v) is
herein referred to as the "Mortgaged Property."

Conversion
- ----------

     Holder shall have conversion rights (the "Conversion Rights") as follows:

     (i) At the option of Holder and upon notice to the Company as set forth
     below, all or any part of the principal amount of this Debenture may be
     converted into fully paid and nonassessable shares of Common Stock of the
     Company, at the conversion rate of one fully paid and nonassessable share
     of Common Stock for each $4.05 of Debenture converted ("Conversion Rate").
     Fractional shares will not be issued.

     (ii) Before Holder shall be entitled to convert this Debenture or a part
     hereof into shares of Common Stock, the Holder shall surrender the
     Debenture to the Company at its offices at the address set forth herein (or
     at such other address of which the Company shall have notified the Holder
     in writing), and shall give written notice to the Company at such offices
     that Holder elects to convert the Debenture and, if the Debenture is to be
     converted in part, stating the amount thereof so to be converted and, if
     the Debenture is to be converted at maturity on September 4, 1994, or
     within ninety (90) days prior to such date, the Holder shall give such
     notice to the Company of its intent to convert at least ninety (90) days
     prior to the Conversion Date (as hereinafter defined). Such notice shall
     also state the name or names (with address or addresses) in which the
     certificate or certificates for shares of Common Stock issuable upon such
     conversion shall be issued and shall contain such representations as may
     reasonably be required by the Company to the effect that the shares to be
     received upon conversion are not being acquired for distribution and will
     not be transferred in any way that might violate the then applicable laws.
     On the Conversion Date or as promptly as practicable thereafter and upon
     the surrender of the Debenture or part thereof as aforesaid, the Company
     shall issue and shall deliver to Holder at the address specified by the
     Holder as set forth herein a certificate or certificates for the number of
     shares issuable upon the conversion of the Debenture or part thereof in
     accordance with the provisions hereof. Such conversion shall be deemed to
     have been effected at the close of business on the date designated for
     conversion in such notice or, if no conversion date is designated, on the
     date on which such notice shall have been received at the office of the
     Company and the Debenture shall have been surrendered in whole or in part
     as aforesaid (the "Conversion Date"), and at such time the rights of Holder
     as obligee shall cease with regard to that portion of the Debenture
     surrendered for conversion and the person or persons in whose name or names
     any certificate or certificates for shares of Common Stock shall be
     issuable upon such conversion shall be deemed to have become the holder or
     holders of record of the shares of Common Stock represented thereby to the
     extent of such conversion. All certificates issued upon the exercise of the
     conversion shall contain a legend governing restrictions upon such shares
     imposed by law. The Company shall return to the Holder any Debenture
     converted in part with an appropriate notation endorsed thereon evidencing
     such partial conversion.

     (iii) In the event the Company at any time or from time to time after the
     Closing Date effects a subdivision or combination of its outstanding Common
     Stock into a greater or lesser number of shares or grants a dividend
     payable in Common Stock of the Company, then and in each such event the
     Conversion Rate shall be increased or decreased proportionately.

     (iv) The Company shall at all times reserve and keep available out of its
     authorized but unissued shares of Common Stock a sufficient number of
     shares for issuance to the Holder under all obligations convertible into
     shares of Common Stock, including such number of its shares of Common Stock
     as shall from time to time be sufficient to effect the Conversion of this
     Debenture; and if at any time the number of authorized but unissued shares
     of Common Stock so reserved shall not be sufficient to effect such
     conversion of all convertible obligations, the Company will take such
     corporate action as may, in the opinion of its counsel, be necessary to
     increase its authorized but unissued shares of Common Stock so reserved to
     such number of shares as shall be sufficient for such purpose.

     (v) In the event the Company elects to prepay the Debenture, it shall give
     thirty (30) days written notice to Holder during which time Holder may
     elect to exercise its conversion nights.

Consolidation or Merger

     The Company shall not consolidate or merge into, or transfer or lease all
or substantially all of its assets to, any person unless:

     (i) The person assumes all the obligations of the Company under this
     Debenture, including but not limited to the due and punctual payment of the
     principal of this Debenture; and

     (ii) Immediately after the transaction no Event of Default exists.

The surviving entity, transferee or lessee shall be the successor Company, but
the predecessor Company in the case of a transfer or lease shall not be released
from the obligation to pay the principal of this Debenture.

Default
- -------

     An "Event of Default" occurs if:

     (i) The Company defaults in the payment of the principal of this Debenture
     when the same becomes due and payable at maturity,

     (ii) The Company fails to comply with any of its other agreements in this
     Debenture and the failure continues for a period of thirty (30) days after
     notice in writing to the Company from the holder of this Debenture,
     specifying such failure and demanding that such failure be remedied;

     (iii) The Company commences a voluntary case in bankruptcy, consents to the
     entry of any order for relief against it in an involuntary case in
     bankruptcy, consents to the appointment of a custodian of it or for all or
     substantially all of its property, or makes a general assignment for the
     benefit of its creditors under any federal or state bankruptcy law or other
     similar provision for the relief of debtors; or

     (iv) A court of competent jurisdiction enters an order or decree under any
     federal or state bankruptcy law, or other similar provision for the relief
     of debtors, for relief against the Company in an involuntary bankruptcy
     case, appoints a custodian of the Company or for all or substantially all
     of its property, or orders the liquidation of the Company and the order or
     decree remains unstayed and in effect for thirty (30) days.

     (v) Any default by the Company of any obligation set out in any other
     agreement whatsoever with the Holder and such default continues for a
     period of thirty (30) days after notice thereof by the Holder to the
     Company.

     If an Event of Default shall occur and be continuing, the principal hereof
may be declared due and payable by notice to the Company in writing. Upon such
declaration the principal of this Debenture shall be due and payable
immediately.

     If an Event of Default occurs and is continuing, the holder of this
Debenture may pursue any available remedy or collect the payment of principal on
this Debenture or to enforce the performance of any provision of this Debenture.
A delay or omission by the holder of this Debenture in exercising any right or
remedy accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default. All remedies are
cumulative to the extent permitted by law. In any suit for the enforcement of
any right or remedy under this Debenture, a court in its discretion may require
the filing by any party litigant in the suit of an undertaking to pay the costs
of the suit, and the court in its discretion may assess reasonable costs,
including reasonable attorneys' fees, against any party litigant in the suit,
having due regard to the merits and good faith of the claims or defenses made by
the party litigant.

Transferability
- ---------------

     This Debenture is not transferable without the consent of the Company,
except to a subsidiary or affiliate of Nordion International, Inc.

Notice
- ------

     Any notice or communication by the Company to the Holder shall be mailed by
first-class mail to the address as shown on below. If a notice or communication
is mailed in the manner provided above within the time prescribed, it will be
deemed duly given, whether or not the addressee receives it.

     The Company's address is:

                  Vindicator, Inc.
                  1801 Thonotosassa Road - Suite 3
                  Plant City, Florida 3356
                  Attention:  President

The Company may change its address by providing written notice of such change to
the Holder.

         The Holder's address is:

                  Nordion International, Inc.
                  447 March Road
                  Kanata, Ontario, Canada, K2KIX8
                  Attn:  Vice President/General Counsel /Corporate Secretary

The Holder may change its address by providing written notice of such change to
the Company.

General
- -------

     No recourse shall be had for the payment of the principal of this Debenture
or for any claim based hereon or otherwise in respect hereof against any
shareholder, officer or director, as such, past, present or future, of the
Company, whether by virtue of any constitutional provision, statute or rule of
law or equity, or by the enforcement of any assessment or penalty or otherwise,
all such liability being, by the acceptance hereof and as part of the
consideration for the issue hereof, expressly waived and released by the Holder
hereof.

     The laws of the State of Florida shall govern this Debenture.

     IN WITNESS WHEREOF, Vindicator, Inc., has caused this Debenture to be
executed in its corporate name by the President, and has caused its corporate
seal to be imprinted hereon and attested by the Secretary.

Dated:  January 15, 1992                            VINDICATOR, INC.



                                                    By: /s/ Sam R. Whitney
                                                       -------------------------
                                                         President

(Seal)

ATTEST:



By:
   ---------------------------
     Secretary



                         MORTGAGE AND SECURITY AGREEMENT


         THIS MORTGAGE AND SECURITY AGREEMENT (this "Mortgage") is made and
entered into as of the 15th day of January, 1992, by and between Vindicator,
Inc. of Hillsborough County, Florida, hereinafter called Mortgagor; and Nordion
International, Inc., a Canadian corporation hereinafter called Mortgagee;

                              W I T N E S S E T H:
                              -------------------

         Mortgagor, in consideration of the sum of Ten Dollars ($10.00) and
other good and valuable consideration to Mortgagor paid by Mortgagee, the
receipt and sufficiency of which are hereby acknowledged, does hereby grant,
bargain, sell, assign, transfer, convey and confirm unto Mortgagee the following
described property (collectively, the "Property"):

         (A) The Land.  All of the land located in Polk County, Florida and
         described as follows:

         A parcel of land being in the SW1/4 of Section 2, TOWNSHIP 30 SOUTH,
         RANGE 23 EAST, Polk County, Florida, being more particularly described
         as follows:

         Commence at the Southwest corner of said Section 2; thence North
         00(degree)07'56" West along the West line of said SW1/4 a distance of
         1614.06 feet to the South line of the North 990 feet of said SW1/4;
         thence North 88(degree)34'00" East along said South Line and parallel
         with the North line of said SW1/4 a distance of 1643.3 feet to the
         point of beginning; thence South 01(degree)26'00" East, 360.00 feet;
         thence North 88(degree)34'00" East parallel with said North line of the
         SW1/4 a distance of 317.31 feet to the point of Curvature of a curve
         concaved Northwesterly having a radius of 570.00 feet, a central angle
         of 18(degree)51'00", a chord bearing of North 79(degree)08'30" East,
         and a chord distance of 186.68 feet; thence Northeasterly along said
         curve 187.53 feet to the point of Tangency; thence North
         69(degree)43'00" East, 56.11 feet to point of curvature of a curve
         concaved northwesterly having a radius of 30.00 feet, a central angle
         of 90(degree)00'00", a chord bearing of North 24(degree)43'00" East,
         and a chord distance of 42.43 feet; thence Northeasterly along said
         curve 47.12 feet to the point of Tangency, said point being on the
         Westerly right of way line of Prairie Mine Road; thence North
         20(degree)17'00" West along said right of way line 288.70 feet to said
         South line of the North 990 feet of said SW1/4; thence South
         88(degree)34'00" West along said South line and parallel with said
         North line of the SW1/4 a distance of 480.00 feet to the point of
         beginning (the "Land").

         (B) Improvements. All buildings, structures, betterments and other
         improvements of any nature now or hereafter situated, or intended to be
         situated, in whole or in part upon the Land, regardless of whether
         physically affixed or now or hereafter severed or capable of severance
         from the Land (the "Improvements").

         (C) Personal Property and Fixtures. All of Mortgagor's personal
         property of every nature and fixture, including without limitation all
         furnishings, fixtures, machinery, tools and equipment used in,
         necessary for or related to the Mortgagor's facility, whether now owned
         or hereafter acquired or used in connection therewith and located
         thereon (the "Personal Property and Equipment").

         (D) Accounts. All debts, accounts, claims, money and choses in action
         which are, or which at any time hereafter be due or owing to or owned
         by the Company, and also securities, mortgages, bills, notes, and other
         documents, now held or owned, or which may be hereafter taken, held or
         owned by or on behalf of the Company in respect of the said debts,
         accounts, claims, moneys and choses in action or any part thereof, and
         also all books, documents and papers recording, evidencing or relating
         to the said debts, accounts claims, money and choses in action or any
         part thereof (the "Accounts Receivable");

         (E) Easements or Other Rights. Together with all easements, rights of
         way, gores of land streets, ways, alleys, passages, sewer rights,
         waters, water courses, water rights and powers, and all estates,
         rights, titles, interests, privileges, liberties, tenements,
         hereditaments and appurtenances whatsoever, in any way belonging,
         relating or appertaining to any of the Land and Improvements, or which
         hereafter shall in any way belong, relate or be appurtenant thereto,
         now owned or hereafter acquired by Mortgagor and the reversion and
         reversions, remainder and remainders, and all of the estate, rights,
         title, interests, property, possession, claim and demand whatsoever, at
         law as well as in equity, of Mortgagor, in and to the same, including
         but not limited to all judgments, awards or damages and settlements
         hereafter made resulting from condemnation proceedings or taking of the
         property described in paragraphs (A), (B), (C) or (D) hereof or any
         part thereof under the power of eminent domain, or for any damage
         (whether caused by such taking or otherwise) to the property described
         in paragraphs (A), (B), (C) or (D) hereof or any part thereof, or to
         any rights appurtenant thereto.

                  Everything referred to in paragraphs (A), (B), (C), (D) or (E)
         is herein referred to as the "Mortgaged Property."

                  The Company undertakes that it shall, at its own expense,
         register the security interests created hereby, in accordance with the
         Uniform Commercial Code, and shall record the Mortgage and Security
         Agreement in the appropriate land registry office(s).

                  Until the security created hereby becomes enforceable the
         Company will not without the prior written consent of the Holder create
         or assume or have outstanding, except to the Holder, any mortgage,
         charge or other encumbrance on any part of the Mortgaged Property
         ranking or purporting to rank or capable of being enforced in priority
         to or pari passu with the security hereby created, other than liens for
         taxes, assessments and charges or levies not due at the date hereof;

                  Except as otherwise provided herein, the Company shall not
         without the prior written consent of the Holder, sell, lease, release,
         surrender, abandon or otherwise dispose of or move or transfer from its
         present location, the Mortgaged Property or any part thereof; however,
         the Company may at any time without consent of the Holder, lease or
         sell items of inventory in the ordinary course of its business so that
         purchasers thereof take title clear of the mortgages and charges
         created hereby but if such sale or lease results in Accounts Receivable
         such Accounts Receivable shall be subject to the mortgages and charges
         created hereby.

                  The Holder may at its discretion at any time release from the
         charges and security interests contained herein any part or parts of
         the Mortgaged Property or any of the security either with or without
         sufficient consideration therefore, without responsibility therefore
         and without releasing any other part of the Mortgaged Property or from
         any of the covenants herein contained. Every part of the Mortgaged
         Property into which the Mortgaged Property is or may hereinafter be
         divided does and shall stand charged of payment of the indebtedness and
         no person shall have the right to require that the indebtedness be
         apportioned.

                  Mortgagor hereby grants to Mortgagee a mortgage and a security
         interest in all of the Mortgaged Property and in addition to the rights
         of a mortgagee, Mortgagee shall have all rights of a secured party
         under the Florida Uniform Commercial Code.

                  TO HAVE AND TO HOLD the Property unto Mortgagee forever.

                  Mortgagor hereby covenants with Mortgagee that Mortgagor is
         indefeasibly seized with the absolute and fee simple title to the
         Property; that Mortgagor has full power and lawful authority to sell,
         convey, assign, transfer and mortgage the same; that it shall be lawful
         for Mortgagee at any time hereafter peaceably and quietly to enter
         upon, have, hold and enjoy the Property and every part thereof.

                  Mortgagor covenants that Mortgagor, at Mortgagor's own
         expense, will execute such other and further instruments and assurances
         to vest absolute and fee simple title to the Property in Mortgagee that
         may be requested by Mortgagee; and that Mortgagor will warrant and
         defend the title to the Property unto Mortgagee against the lawful
         claims and demands of all persons whomsoever.

                  This Mortgage and Security Agreement is given to secure
         payment of amounts owed to the Mortgagee and any interest accruing
         thereon (if any) (i) as set out in the Convertible Debenture dated
         January 15, 1992 issued by Mortgagor to Mortgagee, in the amount of
         $900,000 attached hereto as Exhibit A; (ii) up to $250,000 in
         additional loans from Mortgagee to Mortgagor, pursuant to an Agreement
         dated December 11, 1991 between Mortgagor and Mortgagee evidenced by a
         certain Debenture dated January 15, 1992 between Mortgagor and
         Mortgagee; and (iii) up to $500,000 in additional loans from Mortgagee
         to Mortgagor which may be advanced in the discretion of Mortgagee for
         the purpose of providing additional working capital for Mortgagor.

                  Mortgagor has executed and delivered a Mortgage and Security
         Agreement dated as of October 22, 1991 (the "Existing Mortgage") in
         favor of Mortgagee to secure up to $600,000 of indebtedness, as
         referenced therein. It is the intention of Mortgagor and Mortgagee that
         this Mortgage constitute a first mortgage lien on the Property on a
         parity with the Existing Mortgage. Mortgagee may enforce this Mortgage
         and/or the Existing Mortgage either together or individually and in any
         order.

                  Mortgagor hereby further covenants to pay all taxes and
         assessments levied or assessed upon the Property before the same become
         delinquent, and in no event to permit the Property, or any part
         thereof, to be sold for nonpayment of taxes or assessments; to keep the
         Property in good repair and to permit, commit or suffer no waste,
         impairment or deterioration thereof; to comply strictly with all laws
         and governmental regulations and rules affecting the Property or its
         operation; to pay all taxes that may be levied or assessed on this
         Mortgage or the moneys secured hereby; to permit no mechanic's or other
         liens arising either by contract or by law to be created or rest upon
         all or any part of the Property for ten days without the same being
         paid or released and discharged of the Property; and to pay all costs
         and expenses incurred or paid by Mortgagee in collecting the moneys
         hereby secured or in enforcing or protecting the rights and security of
         the Mortgagee hereunder, including reasonable attorney's fees incurred
         out of court, at trial, on appeal, or in bankruptcy proceedings, in the
         event this Mortgage and the liability be placed in the hands of an
         attorney for collection.

                  Mortgagor further covenants to keep the buildings, structures
         and other improvements now or hereafter erected or placed on the Land
         and constituting a part of the Property constantly insured against all
         loss or damage for the full insurable value thereof for fire, windstorm
         and extended coverage in insurance companies satisfactory to Mortgagee
         (but Mortgagee shall not be liable for the insolvency or
         irresponsibility of any such companies,) which policies shall provide
         for not less than 10 days prior written notice of cancellation to
         Mortgagee, and to pay promptly all premiums for such insurance, the
         policies representing which shall be delivered to and held by Mortgagee
         as additional security for the payment of the indebtedness and
         liability secured hereby. All sums recoverable on any such insurance
         policies shall be made payable to Mortgagee by a loss payable clause
         satisfactory to Mortgagee, to be attached to such policies. In the
         event any such insurance policy shall expire during the life hereof,
         Mortgagor agrees to procure and pay for renewal a thereof, with the
         above requirements, replacing such expired policy, ten days prior to
         the expiration date of such policy. In case of loss, Mortgagee is
         hereby authorized to adjust and settle any claim under any such policy
         and Mortgagee is authorized to collect and receipt for any such
         insurance money and to apply the same, at Mortgagee's option, in
         reduction of the indebtedness hereby secured, whether due or not, or to
         allow Mortgagor to use such insurance money, or any part thereof, in
         repairing the damage or restoring the improvements or other property
         without affecting the lien hereof for the full amount secured hereby.

                  It is further covenanted that Mortgagee may (but shall not be
         obligated to) advance moneys that should have been paid by Mortgagor
         hereunder in order to protect the lien or security hereof, and
         Mortgagor agrees without demand to forthwith repay such money, which
         amount shall bear interest from the date so advanced until paid at the
         annual rate of three percentage points above the "prime rate" for
         similarly sized commercial obligations as published from time to time
         in the Wall Street Journal and shall be considered as so much
         additional indebtedness secured hereby; but no payment by Mortgagee of
         any such moneys shall be deemed a waiver of any rights of Mortgage
         hereunder.

                  Mortgagor further covenants that granting any extension or
         extensions of the time for payment of any part or all of the total
         indebtedness or liability secured hereby, or taking other or additional
         security for payment thereof, shall not affect this Mortgage or the
         rights of Mortgagee hereunder, or operate as a release from any
         liability upon any part of the indebtedness hereby secured or under any
         covenant herein contained.

                  It is further covenanted and made of the essence hereof that
         in case of failure to make any payment when due or default for thirty
         (30) days in the performance of any of the other covenants herein on
         the part of Mortgagor, then the Mortgagee may consider all unmatured
         indebtedness or liability secured hereby, and accrued interest thereon,
         if any, as immediately due and payable, without demand and without
         notice or declaration, and Mortgagee shall have the right forthwith to
         institute proceedings to enforce the collection of all money secured
         hereby and/or to foreclose the lien hereof.

                  Mortgagee may proceed by suit or suits at law or in equity or
         by any other appropriate proceeding or remedy (i) to foreclose the lien
         of this Mortgage or obtain possession of the Mortgaged Property, or
         both, under the judgment or decree of a court or courts of competent
         jurisdiction, (ii) to realize upon any and all other security for the
         sums due under the Debenture as Mortgagee may elect; and no such
         action, suit, proceeding, judgment, levy, execution, or other process
         will constitute an election of remedies by Mortgagee, or will in any
         manner alter, diminish, or impair the lien created by this Mortgage,
         unless and until the sums due under the Debenture are paid in full, and
         (iii) to pursue any other remedy available to it, all as Mortgagee
         shall deem more effectual for such purpose.

                  Mortgagee may apply, on ex parte motion to any Court of
         competent jurisdiction, for the appointment of a receiver to take
         charge of, management, preserve, protect, complete construction of, and
         operate the Mortgaged Property and any business or businesses situated
         thereon, or any combination; to collect the rents; to make all
         necessary and needed repairs; to pay all taxes, assessments, insurance
         premiums, and all other costs incurred in connection with the Mortgaged
         Property; and, after payment of the expenses of the receivership,
         including reasonable attorney's fees, and after compensation to the
         receiver for management and completion of the Mortgaged Property, to
         apply all net proceeds derived therefrom in reduction of the
         indebtedness secured hereby; or in such other manner as the Court shall
         direct. The appointment of such receiver shall be a matter of strict
         right to Mortgagee, regardless of the adequacy of the security or of
         the solvency of any party obligated for payment of the indebtedness
         secured hereby. All expenses, fees, and compensation incurred pursuant
         to any such receivership shall be secured by the lien of this Mortgagee
         until paid. The receiver, personally or through agents, may exclude the
         Mortgagor wholly from the Mortgaged Property and have, hold, use,
         operate, manage and control the Mortgaged Property, and may in the name
         of the Mortgagor exercise all of the Mortgagor's rights and powers to
         maintain, construct, operate, restore, insure, and keep insured the
         Mortgaged Property in such manner as such receiver deems appropriate.

                  No delay or omission of Mortgagee or of any holder of the
         indebtedness secured hereby to exercise any right, power or remedy
         accruing upon a default shall exhaust or impair any such right, power
         or remedy or shall be construed to waive any such default or to
         constitute acquiescence therein. Every right, power and remedy given by
         this Mortgage to Mortgagee may be exercised from time to time and as
         often as may be deemed expedient by Mortgagee.

                  No waiver of any default hereunder shall extend to or affect
         any subsequent or any other default then existing, or impair any
         rights, powers or remedies consequent thereon. If Mortgagee (a) grants
         forbearance of an extension of time for the payment of any sums secured
         hereby; (b) takes other or additional security for the payment thereof;
         (c) waives or does not exercise any right granted in this Mortgage; (d)
         releases any part of the Mortgaged Property from the lien of this
         Mortgage; (e) consents to the filing of any map, plat or replat of the
         Land; (f) consents to the granting of any easement on the Land; or (g)
         makes or consents to any agreement changing the terms of the
         indebtedness hereby secured by this Mortgage or subordinating the lien
         or any charge hereof, no such act or omission shall release, discharge,
         modify, change or affect the original liability under this Mortgage or
         otherwise of Mortgagor, or any subsequent purchaser of the Mortgaged
         Property or any part thereof or any maker, co-signer, endorser, surety
         or guarantor. Nor shall any such act or omission preclude Mortgagee
         from exercising any right, power or privilege herein granted or
         intended to be granted in case of any default then existing or of any
         subsequent default; nor, except as otherwise expressly provided in an
         instrument or instruments executed by Mortgagee, shall the lien of this
         Mortgage be altered thereby. In the event of the sale or transfer by
         operation of law or otherwise of all or any part of the Mortgaged
         Property, Mortgagee, without notice to any person, firm or corporation,
         is hereby authorized and empowered to deal with any such vendee or
         transferee with reference to the Mortgaged Property or the indebtedness
         secured hereby, or with reference to any of the terms or conditions
         hereof, as fully and to the same extent as it might deal with the
         original parties hereto and without in any way releasing or discharging
         any of the liabilities or undertakings hereunder.

                  No right, power or remedy conferred upon or reserved to
         Mortgagee by this Mortgage is intended to be exclusive of any other
         right, power or remedy, but each and every such right, power and remedy
         shall be cumulative and concurrent and shall be in addition to any
         other right, power and remedy given hereunder or now or hereafter
         existing at law or in equity or by statute.

                  It is further stipulated and agreed by and between the parties
         that Mortgagee shall have the right to exercise any option or privilege
         herein given or reserved and to enforce any duty of Mortgagor at any
         time without further or other notice regardless of any prior waiver by
         Mortgagee or default of Mortgagor or delay by Mortgagee in exercising
         any right, option, or privilege or enforcing such duty of Mortgagor,
         and no waiver by Mortgagee or default of Mortgagor nor delay of
         Mortgagee in exercising any right, privilege or option or in enforcing
         any duty of Mortgagor shall be deemed, held, or construed to be a
         waiver or any of the terms or provisions of this Mortgage or of any
         subsequent or continuing default.

                  This instrument also serves as a security agreement and
         creates a security interest in favor of Mortgagee herein under the
         Uniform Commercial Code as adopted in Florida, and Mortgagee shall also
         have all rights, privileges and remedies including notice of a secured
         party under the Florida Uniform Commercial Code and without limitation
         upon or in derogation of the rights and remedies created under and
         accorded Mortgagee by this Mortgage pursuant to the common law or any
         other laws of the State of Florida or any other jurisdiction, it being
         understood that the rights and remedies of Mortgagee under the Florida
         Uniform Commercial Code shall be cumulative and in addition to all
         other rights and remedies of Mortgagee arising under the common law or
         any other laws of the State of Florida or of any other jurisdiction. On
         demand Mortgagor shall promptly pay all costs and expenses of filing
         statements, continuation statements, partial releases, and termination
         statements deemed necessary or appropriated by Mortgagee to establish
         and maintain the validity and priority of the security interest of
         Mortgagee. It is expressly agreed in accordance with the provisions of
         the Florida Uniform Commercial Code, ten (10) days notice by Mortgagee
         to Mortgagor shall be deemed to be reasonable notice under any
         provisions of the Florida Uniform Commercial Code requiring such
         notice.

                  This Mortgage is given to secure not only the existing
         Debentures, but also such additional debentures as may be issued from
         time to time by Mortgagor to Mortgagee or other indebtedness as may be
         extended from time to time by Mortgagee to Mortgagor according to the
         provisions set forth above within twenty (20) years from the date
         hereof, to the same extent as if such additional debentures or other
         indebtedness were issued on the date of the execution of this Mortgage.
         Such debentures or other indebtedness shall constitute future advances
         under this Mortgage. The total amount of Debentures or other
         indebtedness that may be so secured may decrease or increase from time
         to time, but the total unpaid balance so secured at one time shall not
         exceed $2,000,000, plus interest thereon and any disbursements made for
         the payment of taxes, levies or insurance on the Mortgaged Property and
         interest on such disbursements.

                  Mortgagor hereby waives all rights of homestead exemption
         granted by the Constitution and laws of Florida. All covenants and
         obligations of the respective parties hereto shall extend to and be
         binding upon their respective heirs, personal representatives,
         successors and assigns.

                  IN WITNESS WHEREOF, Mortgagor has executed this Mortgage this
15th day of January, 1992.

                  Singed, sealed and delivered in the presence of:

                                              VINDICATOR, INC.


ATTEST:                                       By:
        -------------------------------          -------------------------------
        Walter H. Harkala, Secretary             Sam R. Whitney, President



STATE OF FLORIDA
COUNTY OF HILLSBOROUGH

         BEFORE ME, the undersigned authority, on this 15th day of January,
1992, personally appeared Sam R. Whitney and Walter H. Harkala, to me known,
who, being by me duly sworn did depose and say that they are the president and
secretary, respectively, of Vindicator, Inc., the corporation that executed the
Mortgage and Security Agreement, and that the same was executed freely and
voluntarily, for the uses and purposes therein expressed.

         WITNESS my hand and official seal the date aforesaid.


                                              ---------------------------
                                              Notary Public


                                              My Commission Expires:



                               FINANCING AGREEMENT

     THIS FINANCING AGREEMENT (this "Agreement") is made and entered into this
21st day of February 1992, by and between VINDICATOR, INC. ("Vindicator"), a
Florida corporation whose principal offices are located in Plant City, Florida,
and NORDION INTERNATIONAL INC. ("Nordion"), a Canadian corporation whose
principal offices are located in Kanata, Ontario, Canada.

     WHEREAS, Vindicator has built a commercial food irradiation facility in
Mulberry, Florida, principally for the purpose of irradiating food and related
products; and

     WHEREAS, Nordion desires to supply Vindicator with a supply of Cobalt 60;

     NOW THEREFORE, in consideration of the premises and the mutual covenants
and agreements contained herein and other good and valuable consideration the
receipt and sufficiency of which are hereby acknowledged by both parties to this
Agreement, the parties hereby agree as follows:

     1.   Upon the terms and subject to the conditions set forth herein, Nordion
          hereby supplies Vindicator with 600,000 curies of cobalt 60 (the
          "Cobalt"), which is in addition to 400,000 curies previously supplied,
          at Vindicator's facility in Mulberry, Florida. The purchase price to
          be paid by Vindicator to Nordion for the additional 600,000 curies of
          Cobalt shall be $1,082,321.67 (Canadian Dollars), such amount to be
          paid as provided in Paragraph 2 of this Agreement.

     2.   (a) The amount referred to in Paragraph 1 shall be due and payable in
          full on September 4, 1994 (the "Due Date"). Such amount shall not bear
          any interest until the Due Date, whereupon such amount shall bear
          interest at the rate of three percentage points above the "prime rate"
          for similarly sized commercial obligations as published from time to
          time in the Wall Street Journal.

          (b) Payment of any amount due under this Paragraph 2 shall be secured
          by a first, preferred security interest in the Cobalt to be granted to
          Nordion upon or before sale or delivery of the Cobalt. In addition, in
          the event that any other assets of Vindicator are at any time subject
          to any other security interest, then simultaneously with the granting
          of such security interest Nordion shall be granted a subordinate
          security interest in such assets, Any security interest granted
          hereunder to Nordion shall be granted by way of a security agreement
          in substantially the same form as is attached hereto as Exhibit A.
          Upon or before consummation of the transaction to which any such
          security interest relates, proper opinions and security filings must
          be effected as to each security interest granted hereunder.

          (c) Vindicator shall be deemed in default of its payment obligation
          under this Paragraph 2 upon the occurrence of any of the following:

               (i) Any amount owed hereunder not being paid in full when due; or

               (ii) The irradiation by Vindicator at its facility of any
               product, other than food or related products including packaging
               materials, for any customer who, to the knowledge of Vindicator
               after consultation with Nordion had previously had any similar
               product irradiated by gamma radiation by another commercial
               irradiator then willing and able to provide such service and both
               now and then being supplied or otherwise serviced by Nordion
               (this shall not, however, preclude Vindicator from conducting
               research and development activities on any product for any
               customer); or

               (iii) Any act of bankruptcy or insolvency by Vindicator.

          (d)  Vindicator shall have the right to pay part or the entire
               principal sum due under Paragraph 1 remaining unpaid at any time
               without penalty.

          (e)  Nordion may, at its option, convert all or any part of
               $1,082,321.67 (Canadian Dollars) owed into shares of Common Stock
               of Vindicator at the conversion rate of $4.05 (U.S. Dollars) of
               obligation for one share of Common Stock; in the event the
               Company at any time or from time to time after the Closing Date
               effects a subdivision or combination of its outstanding Common
               Stock into a greater or lesser number of shares or grants a
               dividend payable in Common Stock of the Company, then and in each
               such event the Conversion Rate shall be increased or decreased
               proportionately.

          (f)  In the event Vindicator elects to prepay part or all of the
               amount due under Paragraph 1, it shall give thirty (30) days
               written notice to Nordion, during which time Nordion may elect to
               exercise its conversion rights.

     3.   This Agreement shall be governed by the laws of the State of Florida.

     IN WITNESS WHEREOF, the parties have executed this Agreement the day and
year first above written.


ATTEST.                                      VINDICATOR, INC.
(Corporate Seal)

  /s/ Walter H. Harkala                    By:  /s/ Sam R. Whitney
- ---------------------------------               --------------------------------
    Walter H. Harkala, Secretary                       Sam R. Whitney, President

ATTEST:                                      NORDION INTERNATIONAL, INC.
(Corporate Seal)
   /s/ D.L. Nicholas                       By:  /s/ W.P. O'Neill
- ---------------------------------               --------------------------------
    D.L. Nicholas, Secretary                       W.P. O'Neill, President



                               SECURITY AGREEMENT

     THIS SECURITY AGREEMENT (this "Agreement") is made and entered into by and
between NORDION INTERNATIONAL INC., a Canadian corporation (hereinafter "Secured
Party"), having a principal place of business in Kanata, Ontario, Canada, and
VINDICATOR, INC. (hereinafter "Debtor"), having a principal place of business in
Plant City, Florida.

     1. Security Interest, Debtor is indebted to Secured Party under that
certain Financing Agreement dated February 21, 1992 in an amount of
$1,082,321.67(Canadian Dollars) (the "Debt"). Debtor hereby grants to Secured
Party a security interest in and agrees and acknowledges that Secured Party,
without further action on its part, has and shall continue to have a continuing
security interest in all of the "Collateral" (as defined in Section 2 below), to
secure payment of the Debt.

     2. Collateral. For the purposes of this Agreement, the term "Collateral"
shall mean all of the assets described on Exhibit A hereto.

     3. Warranties. Debtor hereby represents, warrants, covenants and agrees to
and with Secured Party
that:

          (a) Except for the security interest granted hereby Debtor is the
     owner of the Collateral free from any lien, security interest or
     encumbrance, and Debtor will defend the Collateral claiming the same or any
     interest therein.

          (b) Debtor will perform all of the covenants of debtor under or with
     respect to the Debt and Debtor will perform all of Debtor's covenants under
     all documents executed by Debtor pursuant thereto.

          (c) In the event Debtor defaults with respect to any of its covenants
     hereunder, Secured Party may proceed against such security or guarantors as
     Secured Party has with respect to the Debt, in such fashion and in such
     order as Secured Party may desire and Secured Party shall not be deemed to
     have waived any of its security rights or other rights by virtue of the
     order or fashion in which it elects to realize on the various security
     interests or guaranties which it has to secure the Debt or by virtue of
     bringing any action to realize on any of the various security interests.

          (d) If Debtor executes this Agreement as a corporation or if Debtor is
     in fact or law a corporation, Debtor warrants it is a duly organized and
     existing Florida corporation, in good standing and duly licensed to operate
     its business. The execution hereof and of any document in connection
     herewith and the consummation of the transactions herein contemplated do
     not violate any provisions of its Charter or By-laws or any contract and
     have or will be duly authorized and approved by its Board of Directors and
     Stockholders.

     4. Default and Remedies. Upon the happening of any of the following events
or conditions, namely: (1) default in the payment or performance of any of the
obligations secured hereby, of any covenant or liability contained or referred
to herein, or any note or other instrument evidencing any of the Debt, or in any
guaranty thereof; (2) any warranty, representation or statement made or
furnished to Secured Party by or on behalf of Debtor in connection with this
Agreement or to induce Secured Party to lend monies to Debtor proves to have
been false in any respect when made or furnished; (3) any substantial theft,
loss, damage or destruction of any of the Collateral, or any sale, transfer,
lease, disposition or encumbrance to or of any of the Collateral, or the making
of any levy, seizure or attachment thereof or thereon; (4) death, dissolution,
termination of existence, insolvency, business failure, appointment of receiver
for Debtor or any of the Collateral or any part of the property of Debtor, or
any material assignment for the benefit of the creditors by, or the commencement
of any proceedings under any bankruptcy or insolvency laws by or against,
Debtor; or (5) Secured Party in good faith believes that the prospect of payment
or performance by Debtor is impaired and deems itself insecure; thereupon or at
any time thereafter, such defects not having previously been cured, Secured
Party at its option may declare all of the Debt secured hereby to be immediately
due and payable and shall then have the remedies of a secured party under the
Florida Uniform Commercial Code or other applicable law, including without
limitation the right to take possession of the Collateral, and for that purpose
Secured Party may, so far as the Debtor can give authority therefor, enter upon
any premises on which the Collateral or any part thereof may be situated, and
remove the same therefrom or render the same unusable or store the Collateral on
Debtor's premises for a reasonable time without rent or cost to Secured Party.
Secured Party may require Debtor to gather the Collateral and to make it
available to Secured Party at a place to be designated by Secured Party which is
reasonably convenient to both parties. If any notice need be given, it will be
reasonable for Secured Party to give Debtor five (5) days prior written notice
of the time and place of any public sale or of the time after which any private
sale or any other intended disposition is to be made. Expenses of retaking,
holding, preparing for sale, selling or the like, including Secured Party's
reasonable attorney's fees and other costs and expenses, will be paid by Debtor,
including all costs and attorneys fees incurred in any appeal.

     5. General. This Agreement and the security interest in the Collateral
created hereby shall terminate only when the obligations hereby secured have
been paid in full. No waiver by Secured Party of any default shall be effective
unless in writing nor operate as a waiver or any other default or of the same
default on a future occasion. To the extent that Debtor's obligations are now or
hereafter secured by property other than the Collateral or by the guarantee,
endorsement or property of any other person, firm or corporation, then Secured
Party shall have the right in its sole discretion to determine which rights,
securities, liens, security interests or remedies it shall at any time pursue,
relinquish, subordinate or modify, or take any other action with respect thereto
without in any way modifying or affecting any of them or any of its rights
hereunder. Until default, Debtor may have possession of the Collateral and use
the same in any lawful manner not inconsistent with this Agreement. Debtor will
not mortgage, pledge or hypothecate its property or assets of any kind to anyone
except to Secured Party or otherwise sell or dispose of any of its property or
assets of any kind except in the normal course of its business. Debtor waives
notice of non-payment, presentment, demand, protest or notice thereof as to any
accounts or any securities or instruments or notes relating thereto, or
otherwise except as specified herein. All rights and remedies herein are
cumulative and not alternative. This Agreement contains the entire agreement of
the parties and neither shall be bound by anything not expressed herein. All
notices to either party shall be given by certified mail, postage prepaid, at
the address first mentioned. Whenever used herein, the singular number shall
include the plural, the plural the singular, and the use of any gender shall
include all genders. All debtors hereto are bound jointly and severally.

         DATED this 21st day of February, 1992


ATTEST.                                      VINDICATOR, INC.
(Corporate Seal)

  /s/ Walter H. Harkala                    By:  /s/ Sam R. Whitney
- ---------------------------------               --------------------------------
    Walter H. Harkala, Secretary                       Sam R. Whitney, President

ATTEST:                                      NORDION INTERNATIONAL, INC.
(Corporate Seal)
   /s/ D.L. Nicholas                       By:  /s/ W.P. O'Neill
- ---------------------------------               --------------------------------
    D.L. Nicholas, Secretary                       W.P. O'Neill, President


<PAGE>


                                    EXHIBIT A

                                   COLLATERAL

One Pallet Type Gamma irradiator as illustrated in Drawing No. B700001-353,
Issue D, Sheets 1 and 2, including all related mechanisms, conveyors, carriers,
control console, meters, manuals, computerized irradiator monitoring system,
spare parts, pool water de-ionizer, emergency source cooling sprinkler system
and safety interlock systems;

One Red Acrylic Dosimetry System, Type BC-2, as described in Specification RAD
LS 117/107, including 2,000 pellets;

One Compu-Dose System, including 500 ceric cerous dosimeters;

1,000,000 curies of Cobalt-60, doubly sealed in standard Nordion capsules, Model
C-188;

Milton Roy Spectrophotometer and accessories;

Mitutoyo Digimatic Thickness Gaging System;

And all other items that are personal property supplied by Nordion International
Inc. to Vindicator, Inc. under Nordion's P.S. No. 58463I, as amended from time
to time.



                                                    NORDION
                                                    INTERNATIONAL INC.

January 28, 1992


MDS Health Group Ltd.
100 International Blvd.
Etobicoke, Ontario
M9W 6J6

Re:      MDS $300,000 Convertible Subordinated
         Debenture dated July 1, 1991
         ----------------------------

Dear Sir:

Please find set out below Assignment by MDS Health Group Inc. ("MDS") to Nordion
International Inc. ("Nordion") pertaining to:

i)   the $300,000 Convertible Subordinated Debenture between MDS and
     Vindicator of Florida, Inc. (now known as Vindicator, Inc.) dated July
     1, 1991; and

ii)  the Agreement between MDS and Vindicator of Florida, Inc. (now known
     as Vindicator, Inc.) dated July 9, 1991 providing for the right in
     favour of Nordion to convert $2.1 million U.S. indebtedness of
     Vindicator, Inc. into Common Stock of Vindicator, Inc.

                                   ASSIGNMENT
                                   ----------

     MDS Health Group Inc., a Delaware corporation, ("Assignor") in
consideration of good and valuable consideration the sufficiency of which is
hereby acknowledged, does hereby sell, assign and transfer to Nordion
International Inc., a Canadian corporation, ("Assignee") all its right, title
and interest in and to the Convertible Subordinated Debenture and the Agreement
(providing for the right to convert $2.1 million U.S. indebtedness into the
Common Stock of Vindicator, Inc.) made by it with Vindicator of Florida, Inc.
(now known as Vindicator, Inc.) respectively dated July 1st 1991 and July 9,
1991, and attached hereto.

         IN WITNESS WHEREOF the said Assignor has executed this Assignment on
the 21 day of February, 1992.



                                                           MDS Health Group Inc.


                                                        By:/s/ B.R. Moffatt
                                                           ---------------------

If you would be so kind as to have the Assignment executed by a duly authorized
representatives of MDS and returned to my attention, it would be appreciated. In
the event I may be of further assistance with regards to the foregoing, please
do not hesitate to contact me.

Yours truly,
/s/ Neil J. Gotfrit
- ---------------------
Neil J. Gotfrit
Legal Counsel

dp

Enclosures



                                                                   March 6, 1992


Mr. William Schifino
Schifino & Fleisher, P.A.
201 North Franklin Street
1 Tampa City Center
Suite 2700
Tampa, Florida  33602-5174


Dear Sir:

Re:  Vindicator, Inc.
     ---------------

In consideration of the issuance of the Debenture executed by Vindicator, Inc.
dated January 15, 1992, in favour of Nordion International Inc. and on behalf
of, and as authorized by Nordion International Inc., we hereby surrender, for
cancellation the $300,000 Convertible Subordinated Debenture between MDS Health
Group Inc. (which has been duly assigned to Nordion International Inc. by
assignment dated February 21, 1992) and Vindicator of Florida Inc. (now known as
Vindicator, Inc.) dated July 1, 1991 (original enclosed).

                                        Yours truly,
                                        NORDION INTERNATIONAL INC.


                                        /s/ W.P. O'Neill, President
                                        -----------------------------
                                        W.P. O'Neill, President


                                        /s/ William J. Moffat
                                        -----------------------------
                                        William J. Moffat,
                                        Vice-President, Finance & CFO


dp
enclosure
let007/#1



                                                                 August 17, 1992

Mr. Frank Fraser
Nordion International, Inc.
447 March Road
P.O. Box 13500
Kanata, Ontario, K2K 1X8

Dear Frank:

         In reviewing our records I noticed that we did not document a prior
understanding with regard to the convertibility of Vindicator's obligations to
Nordion. As you will recall we had agreed that such obligations would not be
convertible to Common Stock of Vindicator prior to December 1, 1992.

         If this is in accordance with your understanding please acknowledge and
return a copy to me.

                                              Your truly,


                                              Sam Whitney
                                              President


Acknowledged


- --------------------------------
Date:
      --------------------------



BETWEEN:                            VINDICATOR, INC.,
                                    having place of business at
                                    1801 Thonotosassa Rd.,
                                    Plant City, Florida,
                                    U.S.A.
                                    ("Vindicator")

AND:                                NORDION INTERNATIONAL INC.,
                                    having place of business at
                                    447 March Road, Kanata, Ontario,
                                    Canada  K2K 1X8
                                    ("Nordion")


    WHEREAS;

        (A) Vindicator owns and operates a food irradiation facility in
Mulberry, Florida (the "Facility") and desires to assist in the development of
the food irradiation industry;

        (B) Nordion is a world leader in production irradiation and has certain
interests in the Facility, and its commercial applications;

        (C) Nordion desires to develop and promote the commercialization and
demonstration of production irradiation and Vindicator has agreed to permit the
use of the Facility for commercial demonstration purposes;

        (D) Vindicator has agreed to permit Nordion to supply and install in the
Facility approximately 2,600,000 curies ("Ci") of Cobalt-60 ("Cobalt 60") for
development and demonstration purposes under the terms and conditions set out
herein.

    NOW THEREFORE in consideration of the mutual covenants and promises herein
contained the Parties agree as follows:

        1. Nordion agrees to supply and install in the Facility, and Vindicator
           agrees to permit the installation for the purposes of development and
           demonstration of production irradiation approximately 2,600,000 Ci of
           Cobalt-60 in the form of C-188 sealed sources identified in Schedule
           A.

        2. The Cobalt-60 shall be delivered and installed in the Facility
           located in Mulberry, Florida.

        3. The Cobalt-60 shall be shipped on or about September 14, 1992 from
           Nordion's facility in Kanata, Ontario, Canada. All right, title and
           interest in and to the Cobalt-60 shall remain at all times hereunder
           vested in Nordion.

        4. Vindicator agrees and acknowledges that the shipping containers and
           source cages are the property of Nordion and shall be made available
           for return to Nordion at its Kanata, Ontario facility within fourteen
           (14) days after delivery to the Facility.

        5. Vindicator, for a two year period from the date of execution hereof
           or until Nordion removes the Cobalt-60 from the Facility whichever
           occurs first, agrees to provide to Nordion and third parties at the
           request of Nordion, reasonable access to the Facility in order that
           Nordion may demonstrate the operation and benefit of the Facility and
           production irradiation. Nordion shall provide reasonable advance
           notice to Vindicator prior to any such visits.

        6. Nordion may at any time and at its own expense upon ten (10) days
           written notice, (to minimize disruption of Vindicator's operations),
           request that Vindicator provide reasonable access to the Facility in
           order that Nordion may remove its Cobalt-60.

        7. Vindicator warrants and agrees that it will keep and maintain the
           Cobalt-60 at its Facility located in Mulberry, Florida and at no
           other place or places unless otherwise requested by Nordion.

        8. Vindicator shall indemnify and hold Nordion harmless from and against
           any and all claims, demands, actions, personal injury, death, suits
           or proceedings of whatever nature (hereinafter "Claims") with regards
           to the Cobalt-60 including, without limitation, all costs and
           expenses incurred (including reasonable attorney's fees), with
           regards to any claims brought or instituted by a third party and
           based on or arising out of the use by Vindicator of the Cobalt-60
           manufactured, supplied and installed by Nordion. Each party shall
           promptly notify the other of any Claims that it believes to be
           covered by this paragraph.

           Nordion shall indemnify and hold Vindicator harmless from and against
           any and all claims (including reasonable attorney's fees) brought or
           instituted by a third party and based on or arising due to defective
           or improper manufacturing, shipping or installation of the Cobalt-60
           by Nordion.

           Vindicator (or Nordion, as the case may be) may at its option assume
           the defense or substitute itself for the other party as the party in
           interest with respect to such Claims. If Vindicator (or Nordion)
           assumes the defense or substitutes itself as the party in interest,
           the other party shall provide reasonable cooperation with respect to
           the defense against such Claims.

           Neither party shall be liable to the other party or third parties for
           indirect, contingent, special or consequential damages, including
           loss of profit, loss of time or lose of use.

        9. Upon the happening of any of the following events, Nordion shall be
           entitled to summarily terminate this Agreement and retake possession
           of the Cobalt-60 (and containers) without prejudice to any other
           remedy which Nordion may have against Vindicator, if Vindicator:

                (i)   commits a material breach of any of the provisions hereof
                      or any other agreement between the Parties;

                (ii)  is subject to an attachment or other lien against the
                      Cobalt-60 or other process of court;

                (iii) (a) becomes insolvent, or (b) files any application or
                      petition in any tribunal for the appointment of a receiver
                      or trustee for all or a significant portion of its assets,
                      or (c) commences any proceeding under any bankruptcy or
                      reorganization statute or under any provision of the U.S.
                      Bankruptcy Code or under any dissolution or liquidation
                      law whether now or hereafter in effect, or if any petition
                      or application of the type described above is commenced
                      against Vindicator, or (d) makes an assignment for the
                      benefit of creditors or an order is entered for
                      appointment of a trustee or receiver for Vindicator or any
                      significant portion of its assets or adjudicating
                      Vindicator bankrupt.

           Upon the occurrence of any of the events set out in sub-paragraphs
           (ii) or (iii), Vindicator shall forthwith notify Nordion in writing.

           Any payment made or expense incurred by Nordion (including reasonable
           attorney fees and disbursements) in connection with the exercise by
           Nordion of any right upon the occurrence of such event(s) shall be
           borne by Vindicator.

       10. Failure by either party to enforce at any time any of the provisions
           of this Agreement shall not be construed as a waiver of its rights
           hereunder. Any waiver of a breach of any provisions hereof shall not
           affect the rights of either party in the event of any additional
           breach.

       11. Any notice or direction required or permitted to be given hereunder
           shall be in writing and shall be given:

                (i)   by hand delivery of such notice or direction;

                (ii)  by mailing such notice or direction by prepaid registered
                      airmail; or

                (iii) on a term hereafter provided by sending such notice or
                      direction by facsimile;

       to such party at the following address:

       If to Vindicator, Inc.

       1801 Thonotosassa Road, Suite 3,
       Plant City,
       Florida,
       USA

       Attention:  President

       If to Nordion International Inc.

       447 March Road,
       Kanata, Ontario
       K2K 1X8

       Attention:  General Counsel and Corporate Secretary

       Telecopier: 613-592-6937

       or at such other address as such party shall have communicated to the
       other party hereto by notice given as aforesaid. Any notice, direction or
       document delivered pursuant to sub-clause (i) of this section shall be
       deemed to have been given or sent and received at the time such notice,
       direction or document is delivered. Any notice, direction or document
       mailed pursuant to sub-clause (ii) of this section shall be deemed to
       have been given or sent and received on the tenth business day (excluding
       Saturdays, Sundays and statutory holidays in the United States and
       Canada) following the day on which such notice or direction is mailed. At
       the time any notice or direction is sent pursuant to sub-clause (iii) of
       this section, the party giving such notice or direction shall
       concurrently mail a copy of such notice or direction to the other party
       hereto in accordance with sub-clause (ii) of this section. If the copy of
       such notice or direction is so mailed, such notice or direction shall be
       deemed to have been given or received at the time such notice or
       direction is sent in the manner specified in sub-clause (iii) of this
       section.

       12. Neither party shall incur any liability to the other or any other
           person in the event it is delayed in the performance of its
           obligations hereunder or for any failure to comply with the terms
           hereof, solely by "Force Majeure."

           For the purpose of this Agreement, "Force Majeure" shall mean any
           cause of delay beyond the control of the party liable to perform
           unless conclusive evidence to the contrary is provided and shall
           include, but not by way of limitation, strike, lock-out, riots,
           sabotage, acts of war or piracy, destruction of essential equipment
           by fire, explosion, storm, flood, earthquake or delay caused by
           failure of power supply or transport facility, act of any government
           or any government instrumentality (including any action by the Atomic
           Energy Control Board of Canada or its United States counterpart),
           shortages or failure to secure raw material or machinery. In the
           event of Force Majeure, the party defaulting thereupon shall promptly
           notify the other party of the occurrence of such event.

       13. Vindicator shall not assign, mortgage, pledge, charge or otherwise
           encumber the Cobalt-60 or this Agreement or any of its respective
           rights or obligations hereunder without the prior written consent of
           Nordion. Any purported assignment by Vindicator without such consent
           shall be of no effect.

           Vindicator shall at all times protect and defend at its own cost and
           expense the ownership of Nordion's Colbalt-60 against all claims,
           liens, and legal processes of creditors and other persons. The
           Cobalt-60 sources are and shall remain personal property of Nordion
           and shall not become part of any real estate whether as a fixture or
           otherwise.

       14. Vindicator undertakes to post notice of Nordion's ownership of the
           Cobalt-60 in plain view on or near the containment area in the
           Facility and undertakes to provide Nordion with a written opinion
           from its solicitors satisfactory to Nordion that; (i) the Uniform
           Commercial Code of the State of Florida does not provide a procedure
           for notice of retention of ownership of personal property and
           notification thereof to third parties, and (ii) that notice of
           ownership of personal property is generally achieved by posting
           notice of ownership on or near the personal property.

       15. This Agreement shall enure to the benefit of and shall be binding
           upon the successors and assigns of the parties hereto.

       16. This Agreement may not be modified in any manner except by further
           written agreement signed by the duly authorized officers or
           representatives of the parties.

       17. Except to the extent necessary to perform its obligations hereunder,
           or to comply with applicable law, regulation or rule, neither party
           hereto shall without the prior written consent of the other party
           disclose to any third party the terms and conditions of this
           Agreement.

       18. If any clause or part of a clause or any other provision in this
           Agreement shall be or become void or unenforceable, the remainder of
           this Agreement shall remain in full force and effect.

       19. This Agreement shall be governed by, subject to and interpreted in
           accordance with the laws of the State of Florida, U.S.A.

       20. Vindicator acknowledges receipt on the date hereof of a copy of this
           Agreement.

       21. This Agreement shall come into effect on the date of the last
           signature hereto.

       IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized representatives.

                                             VINDICATOR, INC.

                                             By:
                                                 ------------------------------

                                             Date: September 11, 1992
                                                   ----------------------------

                                             NORDION INTERNATIONAL INC.

                                             By:
                                                 ------------------------------

                                             By: Frank Fraser
                                                 ------------------------------

                                             Date: September 11, 1992
                                                   ----------------------------



                                                                January 28, 1993

VINDICATOR, INC.
1801 Thonotosassa Road
Suite 3
Plant City, Florida
U.S.A.
33566


Attention:   Mr. Sam Whitney - President

             FUNDING FOR VINDICATOR, INC. ("VINDICATOR")
             FROM NORDION INTERNATIONAL INC. ("NORDION")

Dear Sir,

This letter confirms our agreement and is effective as of January 21, 1993 to
provide additional funding to Vindicator on substantially the same terms as
previous funding except for the option price.

We will lend one hundred thousand United States dollars ($100,000 U.S.), without
interest, which sum shall be repaid on or before September 4, 1994. Under no
circumstances shall such funds advanced be used to repay existing indebtedness
of Vindicator or to redeem any shares of Vindicator. Failure of Vindicator to
abide by the foregoing shall be deemed to be an Event of Default under the
Convertible Debenture ("Debenture") and Mortgage and Security Agreement
("Security Agreement") respectively issued and dated January 15, 1992.

The foregoing loan shall be deemed to be an advance under, and shall be secured
by, the Security Agreement and shall be convertible into Common Shares of
Vindicator at the option of Nordion in accordance with the terms set out in the
Debenture, save and except that the "Conversion Rate" for each share converted
shall be one fully paid and non assessable share of common stock of Vindicator
for each eight United States dollars ($8.00 U.S.) of the loan converted.

As a gesture of Nordion's commitment to food irradiation and Vindicator, Nordion
will consider advancing additional funds to Vindicator provided Vindicator is
successful in raising at least two hundred thousand United States dollars
($200,000 U.S.) in debt/equity financing. Such additional funds would be in the
order of one dollar ($1.00) for each two dollars ($2.00) of financing raised by
Vindicator.

This agreement shall be governed and interpreted in accordance with the laws of
the state of Florida.

If in agreement, please sign where indicated below for return to me.


NORDION INTERNATIONAL INC.


by:
     Frank Fraser, Vice-President
     Market Development Division

Dated this ____ of ____________, 1993



VINDICATOR, INC.


by:
    ----------------------------------
    Sam A. Whitney, President

Dated this ____ of ____________, 1993

c.c.   W. Schifino



By Fax:  Mr. Blain:      813 228-6422
         Mr. Whitney:    813 754-7606

                                                                  March 31, 1994

Mr. Buddy Blain

and

Mr. Sam Whitney
Vindicator, Inc.
Suite 3
1801 Thonotosassa Road
Plant City, Florida
33566


Dear Buddy and Sam,

As you know, the payment of indebtedness to Nordion comes due on September 4,
1994. We understand that payment cannot be made on that date and we would like
to endeavor to accommodate the continuation of the business without realization
of our security. However, the items raised on July 26, 1993 at the time of our
ceasing to have Nordion nominees on the Board have not been remedied, and
continue to be of concern. You have indicated that you are moving to resolve
these matters and hence we are agreeable to continue to be patient, provided
certain objectives are achieved within a specified time frame.

Specifically, we agree to extend the date for repayment of the indebtedness for
a period of 12 months (to September 4, 1995, "maturity") on the following
conditions, each of which, if not fulfilled, will also constitute an event of
default under the existing security arrangements.

1.   A new President and Chief Executive Officer, as well as new senior
     management of the company will be appointed within two months.

2.   A comprehensive business plan will be developed and approved for
     implementation within four months.

3.   Financing will be obtained in order to maintain all accounts on a current
     basis and additional financing will be obtained sufficient to cover all
     forecasted operating losses and payment in full to Nordion of the
     outstanding debt.

4.   Interest will accrue on the indebtedness from September 4, 1994 at the U.S.
     prime rate then in effect plus 1% and shall be payable quarterly.

5.   Vindicator will not directly or indirectly make any capital expenditures in
     excess of $500,000 from the date hereof to maturity without a matching
     repayment to Nordion of its indebtedness.

As a further condition, any Cobalt-60 on the premises, not owned by Vindicator
may be removed by Nordion in its discretion at any time.

If the above is acceptable, please sign where indicated on the enclosed copy of
this letter for your convenience of reply. We anticipate being kept advised of
the progress and activities of the corporation on a general basis relative to
the projections in the business plan. We would hope that the close relationship
between Vindicator and Nordion is firmly re-established. As an example, we would
be pleased to host a visit to Nordion by the new president of Vindicator and of
course he or she would also be interested in establishing a positive and
mutually helpful relationship with Nordion.

We hope the above offer and conditions are seen as they are intended, as an
example of our continuing support for Vindicator in its efforts in food
irradiation.

                                              Sincerely,
                                              NORDION INTERNATIONAL INC.


                                              by:
                                                  ------------------------------
                                                  F.M. Fraser

The foregoing is agreed and accepted

VINDICATOR, INC.


by:
    ------------------------------

Date:
      ----------------------------




                                                                  April 13, 1994
                                                                       CORRECTED

Mr. F.M. Fraser
NORDION INTERNATIONAL, INC.
447 March Road
P.O. Box 13500
Kanata, Ontario, Canada K2K 1X8

                               Re: Your letter of March 31, 1994

Dear Frank,

Vindicator respectfully acknowledges the consideration given to it by Nordion
International, Inc. in extending the due date for payment of Vindicator's debt
to Nordion for one year and generally accepts the conditions set forth in your
letter of March 31, 1994, subject to the following modifications:

As to condition 1.:         Vindicator agrees to continue its recruiting efforts
                            for President and CEO and will continue screening
                            and evaluation, conduct interviews, and have a
                            status report at the May, 1994, Board meeting. It
                            will schedule final selection and appointment for
                            the June board meeting on June 15, 1994.

As to condition 2.:         Vindicator agrees to develop a new, comprehensive
                            business plan but needs until its August 17, 1994,
                            board meeting to approve such plan for
                            implementation.

As to condition 3.:         Financing will be obtained by January 23, 1995, in
                            order to maintain all accounts on a current basis
                            and additional financing sufficient to cover all
                            forecasted operating losses and payment in full to
                            Nordion of the outstanding debt.

As to condition 4.:         Vindicator agrees that interest will start accruing
                            on the Nordion indebtedness on September 4, 1994, at
                            the U.S. prime rate then in effect plus 1%, payable
                            quarterly, with the first payment due February 4,
                            1995, and quarterly thereafter.

As to condition 5.:         Vindicator agrees that it will not directly or
                            indirectly make any capital expenditures in excess
                            of $500,000 from this date forward until September
                            4, 1995, without a matching repayment to Nordion on
                            Vindicator's indebtedness or, in the alternative,
                            without Nordion's written concurrence.

As to any cobalt-60 owned by Nordion which is stored on Vindicator's premises,
Vindicator agrees that such cobalt-60 may be removed by Nordion in its
discretion at any time.

Please indicate Nordion's concurrence with the above by signing where indicated
below, then Fax a copy to me at (813) 228-6422 and mail an original, signed copy
to me at 100 Madison Street, Ste. 300, Tampa, FL 33602.

We will keep you advised of the progress and activities of Vindicator as set
forth in the closing paragraphs of your letter. On behalf of our new president,
yet to be named, we accept your kind invitation to host a visit to Nordion as
soon as it can be arranged.

Vindicator shares with you the full intention and desire to have a positive and
mutually helpful relationship between Nordion and Vindicator. We are optimistic
about the future of food irradiation and anticipate a long and prosperous
relationship with Nordion.

                                               Sincerely,

                                               VINDICATOR, INC.



                                         by:
                                               -----------------------------
                                               L.M. Buddy Blain, President

The foregoing is agreed and accepted

NORDION INTERNATIONAL, INC.

by:
    ----------------------------

Date:
      --------------------------



                                                               November 23, 1994

Food Technology Service Inc.
1801 Thonotosassa Road
Plant City
Florida
33566


Attention:   Mr. Sam Whitney
             Chairman

Dear Sir,

Nordion has for more than 30 years been a strong advocate of commercial food
irradiation. Nordion remains no less committed to food irradiation than it did
at the time of Food Technology Services Inc.'s ("FTSI") inception. On April 13,
1994, Nordion entered into an agreement with Vindicator, Inc. (now FTSI)
extending the due date for payment of its debt to Nordion to September 4, 1995.
FTSI has been unable to meet the conditions set out in the letter agreement of
April 13, 1994 and has requested an additional extension. In order to assist in
the viability of FTSI and reaffirm its commitment to the benefits of commercial
food irradiation, Nordion agrees to further extend payment of the debt owed by
FTSI to January 4, 1996, provided FTSI meets, and continues to meet as the case
may be, the following conditions:

1.   Continue to obtain funds required or make alternate arrangements to
     discharge all current obligations in full and provide on-going working
     capital.

2.   Reduce operational and management costs and employ the most appropriate
     personnel and resources in order to ensure cost effective operations.

3.   Ensure that FTSI utilizes appropriate systems, policies and procedures as
     applicable in the commercial irradiation industry and general business
     practices in order to meet legal, safety, regulatory and business
     requirements.

4.   FTSI shall provide to Nordion prior notice of any communication with the
     media or public and, without limitation of the foregoing, shall provide
     copies of reports and filings with the Securities and Exchange Commission
     and any notices, documents or information to be provided to shareholders.

5.   Co-ordination of a marketing plan and sales program with Nation's Pride.

6.   FTSI agrees to provide Nordion with a comprehensive business plan,
     including a detailed marketing plan and sales program.

All sums provided by Nordion, including accrued interest, shall continue to have
a first, fixed and specific charge on all assets of FTSI and bear interest at
the Barnett Bank (Florida) U.S. prime rate in effect from time to time plus 1%.
At any time, Nordion shall have the option to convert all or any portion of
FTSI's indebtedness into shares of FTSI at the lower of $4.05 U.S. and the then
current market price. On any offering of securities of FTSI to the public, FTSI
shall obtain prior agreement from Nordion on that portion of the proceeds to be
utilized for payment of its indebtedness to Nordion.

This letter agreement shall not constitute any waiver on the part of Nordion of
any rights or recourses contained in any agreement with FTSI.

                                                 Yours very truly, NORDION
                                                 INTERNATIONAL INC.


                                            by:
                                                --------------------------------


The foregoing is acknowledged
and agreed this _____ day of
_______________, 1994.

FOOD TECHNOLOGY SERVICE, INC.,


by:
    --------------------------



February 17, 1995


Mr. Sam Whitney
Food Technology Service, Inc.
1801 Thonotosassa Road
Suite 3
Plant City, Florida
33566


Dear Sir,

We wish to confirm our continuing and long-standing commitment to the food
irradiation process and to FTSI. Since its inception, FTSI has worked diligently
to forward the food technology process and ensure safer foods for all consumers
in the United States and Canada.

This letter is to formally confirm Nordion's agreement to extend the payment of
the debt owed by FTSI to January 4, 1996 without any conditions.

We look forward to working with you in the next stage of commercial application
of food irradiation.


Your sincerely,



F.M. Fraser
Vice-President
Market Development

c.c.  David Nicholds



February 17, 1995


Mr. Sam Whitney
Food Technology Service, Inc.
1801 Thonotosassa Road
Suite 3
Plant City, Florida
33566


Dear Sir,

As you know, Nordion remains strongly committed to advancing food irradiation
and fully supports the activities of FTSI in that regard. In particular, we note
with gratification the progress being made by FTSI in connection with the
conditions described in our letter of November 23, 1994.

As a result, please accept this letter as our confirmation of the fulfillment of
those conditions and no further requirements in this regard. We look forward to
working with you in bringing this technology forward to ensure safer foods for
consumers.


Your sincerely,




F.M. Fraser
Vice-President
Market Development

c.c.  David Nicholds



May 29, 1995


Food Technology Service, Inc.
1001 Thonotosassa Road
Plant City, Florida
33566


Attention:      Mr. Sam Whitney/Chairman

RE:   Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
      Indebtedness of Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed by FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion, hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued on FTSI's indebtedness to Nordion as at May
29, 1995. The conversion of such interest into shares of FTSI shall be effected
at a price per share of $1.89 (US). FTSI shall issue a share certificate to
Nordion representing such shares. As at May 29, 1995 $257,520 (US) of interest
have accrued on FTSI's indebtedness to Nordion.

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

<PAGE>

This Letter Agreement shall not constitute any waiver on the part of Nordion of
any rights or recourses contained in any other agreement with FTSI.

Yours very truly,


Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this ______ day of __________ 1995.

       FOOD TECHNOLOGY SERVICE INC.


by:
    ---------------------------
    Sam Whitney, Chairman

Cc: Bill Moffat



June 30, 1995

Food Technology Service, Inc.
1001 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:   Conversion of Nordion International's ("Nordion") accrued interest on
      Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at June 30, 1995. The conversion of such interest into shares of FTSI
shall be effected at a price per share of $1.50 (US). FTSI shall issue a share
certificate to Nordion representing such shares. As at June 30, 1995 $32,434
(US) of interest has accrued and is outstanding on FTSI's indebtedness to
Nordion.

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this _____ day of _______ 1995.

      FOOD TECHNOLOGY SERVICE INC.

by:
      Sam Whitney, Chairman

cc: Bill Moffat



                                                                    4 July, 1995


Food Technology Service Inc.
1801 Thonotosassa Road
Plant City
Florida
33566

Attention:    Mr. Sam Whitney
              Chairman


Dear Sir,

Nordion has for more than 30 years been a strong advocate of commercial food
irradiation. Nordion remains no less committed to food irradiation than it did
at the time of Food Technology Service Inc.'s ("FTSI") inception. On April 13,
1994, Nordion entered into an agreement with Vindicator, Inc. (now FTSI)
extending the due date for payment of its debt to Nordion to September 4, 1995.
A second extension to January 4, 1996 was granted on November 23, 1994. FTSI has
been unable to meet the conditions set out in the letter agreement of November
23, 1994 and has requested a further extension. In order to assist in the
viability of FTSI and reaffirm its commitment to the benefits of commercial food
irradiation, Nordion agrees to further extend payment of the debt owed by FTSI
to January 2, 1997, provided FTSI meets, and continues to meet as the case may
be, the following conditions:

1.   Continue to obtain funds required or make alternate arrangements to
     discharge all current obligations in full and provide on-going working
     capital.

2.   Reduce operational and management costs and employ the most appropriate
     personnel and resources in order to ensure cost effective operations.

3.   Ensure that FTSI utilizes appropriate systems, policies and procedures as
     applicable in the commercial irradiation industry and general business
     practices in order to meet legal, safety, regulatory and business
     requirements.

4.   FTSI shall provide to Nordion prior notice of any communication with the
     media or public and, without limitation of the foregoing, shall provide
     copies of reports and filings with the Securities and Exchange Commission
     and any notices, documents or information to be provided to shareholders.

5.   Co-ordination of a marketing plan and sales program with Nation's Pride.

6.   FTSI agrees to provide Nordion with an updated comprehensive business plan,
     including a detailed marketing plan and sales program.

All sums provided by Nordion, including accrued interest, shall continue to have
a first, fixed and specific charge on all assets of FTSI and bear interest at
the Barnett Bank (Florida) U.S. prime rate in effect from time to time plus 1%.
At any time, Nordion shall have the option to convert all or any portion of
FTSI's indebtedness into shares of FTSI at the lower of $4.05 U.S. and the then
current market price. On any offering of securities of FTSI to the public, FTSI
shall obtain a prior agreement from Nordion on that portion of the proceeds to
be utilized for payment of its indebtedness to Nordion.

This letter agreement shall not constitute any waiver on the part of Nordion of
any rights or recourses contained in any agreement with FTSI.



                                              Yours very truly, NORDION
                                              INTERNATIONAL INC.


                                              by:
                                                  ------------------------------


The foregoing is acknowledged
and agreed this _____ day of
______________, 1995


FOOD TECHNOLOGY SERVICE INC.,


by:
    -------------------------------
    Board Chairman and CEO



                                                                   July 13, 1995


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 16,667 shares at US $1.50 in the capital of FTSI as a result
of this investment effective July 13, 1995.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman

/dh



                                                                         NORDION
                                                              INTERNATIONAL INC.


27 July, 1995

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City
Florida 33566
Attention:        Mr. Sam Whitney
                  Chairman


Dear Sir,

Nordion International Inc. ("Nordion") agrees to pay and forward as per your
request and on behalf of Food Technology Service, Inc. ("FTSI") the sums of
$59,304.22, $24,742.96 and $25,474.27 U.S., forming a total $109,521.45 U.S.,
respecting tangible personal property taxes (1994) and property taxes (1993,
1994) past due by FTSI to Polk County authority, Florida (made payable to Jack
Fouts, Tax Collector).

In consideration of such payment of $109,521.45 U.S. FTSI agrees to sell and
issue to Nordion 87,617 shares ($1.25 U.S. per share) in the common stock of
FTSI.

If in agreement, please sign in the space provided below.

                                              Yours truly,
                                              NORDION INTERNATIONAL INC.



                                              by:

The foregoing is acknowledged
and agreed this 27th day of
July, 1995

FOOD TECHNOLOGY SERVICE, INC.,


by:
      Chairman of the Board and CEO

<PAGE>

FOOD TECHnology Service, Inc.                          The Symbol of Quality and
Dedicated to Preventing Food-Borne Illness             Wholesomeness
formerly VINDICATOR, INC.


                                                        July 24, 1995


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Dear Frank:

         Attached hereto are copies of the past due notices on our Polk County
property tax for the years 1993 and 1994. Also attached is a copy of the
tangible personal property assessment for 1994. We finally completed payment of
the 1993 tangible tax on January 20 of this year. With interest added, we paid
over $60,000. The amount for the property tax includes the interest through July
31, 1995 and the tangible tax includes the interest through April 30, 1995. With
interest added for the tangible tax, the total amount due to Polk County Tax
Assessor is about $108,000. The taxes must be paid somehow within the next few
days.

         Hope you can help us out.

         Kindest personal regards.

                                              Sincerely,


                                              Sam Whitney
                                              Board Chairman & CEO



                                                                         NORDION
                                                              INTERNATIONAL INC.



September 30, 1995

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

Re:   Conversion of Nordion International Inc.'s ("Nordion") accrued interest
      on Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at Sept. 30, 1995. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $1.25 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at Sept. 30, 1995
$93,713 (US) of interest has accrued and is outstanding on FTSI's indebtedness
to Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this    day of     1995.


      FOOD TECHNOLOGY SERVICE INC.

by:
      Sam Whitney, Chairman

cc:  Bill Moffat



                                                                         NORDION
                                                              INTERNATIONAL INC.



October 25, 1995

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

Re:   Conversion of Nordion International Inc.'s ("Nordion") accrued interest
      on Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at October 31, 1995. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $1.25 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at October 31, 1995
$31,524.49 (US) of interest has accrued and is outstanding on FTSI's
indebtedness to Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this     day of     1995.


      FOOD TECHNOLOGY SERVICE INC.

by:
      Sam Whitney, Chairman

cc:  Bill Moffat



                                                               November 20, 1995


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 20,000 shares at US $1.25 in the capital of FTSI as a result
of your $25,000 investment of November 20th, 1995.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman




                                    AGREEMENT


                  THIS AGREEMENT is made and entered into as of the 10th day of
December 1995, by and between Nordion International Inc. ("Nordion") and Food
Technology Services, Inc. ("FTSI").

                  WHEREAS, FTSI wishes to establish a long term financing
arrangement for its operations and establish alliances with third parties to
assist its strategic direction; and

                  WHEREAS Nordion is willing to assist in providing continued
financing to FTSI and introduce others who may be able to assist FTSI.

                  NOW, THEREFORE, the parties agree as follows:

                  1.  Nordion will convert into shares of Common Stock of FTSI
                      all of the interest named through March 31, 1996 on its
                      loan to FTSI in the principal amount of approximately $3.8
                      US million.

                  2.  For the term of this Agreement Nordion will convert to
                      stock a portion of its existing loans to FTSI to ensure
                      FTSI will maintain a net equity of at least $1,000,000 to
                      April 30, 1996.

                  3.  For the term of this Agreement, Nordion will advance as
                      loans to FTSI sufficient cash to enable FTSI to meet its
                      obligations as they come due and payable, all in
                      accordance with the plan agreed by the parties.

                  4.  For the term of this Agreement, the conversion price at
                      which Nordion may convert all amounts due it, as referred
                      to in 1, 2 and 3 above and its loan to FTSI in the
                      principal amount of approximately $3.8 US million, into
                      shares of Common Stock is the lesser of the market price
                      at the time of conversion and $.80 US per share. In the
                      event all of the indebtedness were currently converted
                      into shares of Common Stock of FTSI, Nordion would own
                      approximately 60% of FTSI's outstanding shares of Common
                      Stock.

                  5.  FTSI agrees not to issue any additional shares of Common
                      Stock without Nordion's written approval during the term
                      of this Agreement.

                  6.  The term of this Agreement shall be from the date hereof
                      until April 30, 1996.

                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be signed by their duly authorized officers as of the date above written.

ATTEST                                        NORDION INTERNATIONAL INC.


                                          By:

ATTEST                                        FOOD TECHNOLOGY SERVICES, INC.


                                          By:



                                                                         NORDION
                                                              INTERNATIONAL INC.


Via Fax:  813 754-7506



December 13, 1995


Mr. Sam Whitney
Food Technology Service, Inc.
Suite 3
1801 Thonotosassa Road
Plant City, Florida
33566


Dear Sam:

This letter is to clarify that our letter of November 23, 1994 not only agreed
to extension of the date for principal repayment but also extension of the date
upon which interest becomes payable In particular, while interest accrues, as
agreed, it will not be payable until January 4, 1996.

Yours truly,



Frank M. Fraser
Vice-President
Market Development Division



                                                        December 15, 1995


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $35,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 43,750 shares at US $.80 in the capital of FTSI as a result of
your $35,000 Investment of December 15th, 1995.


                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman




December 20, 1995

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566

Attention:  Mr. Sam Whitney/Chairman

RE:   Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
      Indebtedness of Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $65,000 (U.S.) of FTSI's indebtedness to Nordion as at December
31, 1995. This conversion shall be effected at a price per share of $0.80 (US).
FTSI shall issue a share certificate to Nordion representing such shares.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,

Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged  and agreed this 20th day of December 1995.

      FOOD TECHNOLOGY SERVICE INC.

by:
      Sam Whitney, Chairman

cc:  Ben Butler


                                                                         NORDION
                                                              INTERNATIONAL INC.




January 1, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:  Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
     Indebtedness of Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at December 31, 1995. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $0.80 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at December 31, 1995
$61,719.00 (US) of interest has accrued and is outstanding on FTSI's
indebtedness to Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 4th day of January, 1996.

     FOOD TECHNOLOGY SERVICE INC.

by:
     Sam Whitney, Chairman

cc:  Bill Moffat



                                                                 January 5, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $15,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 18,750 shares at US $.80 in the capital of FTSI as a result of
your $15,000 investment of January 5, 1996.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman




                                                                January 23, 1996


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 31,250 shares at US $.80 in the capital of FTSI as a result of
your $25,000 investment of January 23, 19956.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                         by:
                                              Sam Whitney, Chairman

cc:  B. Butler



                                                    February 9, 1996


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $15,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 18,750 shares at US $.80 in the capital of FTSI as a result of
your $15,000 investment of February 9, 1996.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman


cc:  B. Butler


                                                         March 1, 1996


Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8


Reference:  Equity Investments in Food Technology Services Incorporated



Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $30,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 37,500 shares at US $.80 in the capital of FTSI as a result of
your $30,000 investment of March 1, 1996.

                                              Yours very truly,
                                              Food Technology Services Inc.



                                        by:
                                              Sam Whitney, Chairman


cc:  B. Butler



March 31, 1996


Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

Re:   Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
      Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $90,000 (U.S.) of FTSI's indebtedness to Nordion as at March 31,
1996. This conversion shall be effected at a price per share of $0.80 (US). FTSI
shall issue a share certificate to Nordion representing such shares.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this     day of     1995.


      FOOD TECHNOLOGY SERVICE INC.

by:
      Sam Whitney, Chairman

cc:  Ben Butler



March 31, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:   Conversion of Nordion International Inc.'s ("Nordion") accrued
      interest on Indebtedness of Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at March 31, 1996. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $.80 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at March 31, 1996,
$86,277 (US) of interest has accrued and is outstanding on FTSI's indebtedness
to Nordion.


<PAGE>


By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 31st day of March 1996.

FOOD TECHNOLOGY SERVICE INC.

by:
     ----------------------------------
     Sam Whitney, Chairman

cc:  Bill Moffai
     Ben Butler




Mr. Sam Whitney                                       April 2, 1996

Food Technology Service Inc.
1801 Thonotosassa Road
Plant City, Florida
33566

Dear Sir:

Further to our letter of November 23, 1994, a copy of which is enclosed, Nordion
agrees to further extend payment of the debt owed by FTSI to January 4, 1997
based upon the terms set out in that letter, except that the conversion price
shall be at the lower of $.80 U.S. and the then current market price.

                                           Yours very truly,
                                           NORDION INTERNATIONAL INC.



                                      by:
                                           ------------------------------------
                                           F.M. Fraser
                                           Vice-President, Market Development


The foregoing is acknowledged and
agreed this 3 day of April, 1996

FOOD TECHNOLOGY SERVICE, INC.


by:
    ----------------------------------



                                                      April 2, 1996

Mr. Frank Frazer
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $33,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 41,250 shares at U.S. $.80 in the capital of FTSI as a result
of your $33,000 investment of April 2, 1996.

                                           Yours very truly,
                                               Food Technology Services Inc.


                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler



                                                      May 2, 1996

Mr. Frank Frazer
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $27,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 33,750 shares at U.S. $.80 in the capital of FTSI as a result
of your $27,000 investment of May 2, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler



                                                      June 4, 1996

Mr. Frank Frazer
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $30,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 37,500 shares at U.S. $.80 in the capital of FTSI as a result
of your $30,000 investment of June 4, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler



June 30, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:  Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
     Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at June 30, 1996. The conversion of such interest into shares of FTSI
shall be effected at a price per share of $.80 (U.S.). FTSI shall issue a share
certificate to Nordion representing such shares. As at June 30, 1996, $85,683.50
(U.S.) of interest has accrued and is outstanding on FTSI's indebtedness to
Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,




- ------------------------------------
Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 30th day of June 1996.

     FOOD TECHNOLOGY SERVICE INC.


by:
     ------------------------------
     Sam Whitney, Chairman

cc:  Bill Moffat



June 30, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:  Conversion of Nordion International Inc.'s ("Nordion") Indebtedness of Food
     Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $50,000 (U.S.) of FTSI's indebtedness to Nordion as at June 30,
1996. The conversion shall be effected at a price per share of $0.80 (U.S.).
FTSI shall issue a share certificate to Nordion representing such shares.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,




- -----------------------------------
Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 30th day of June 1996.

     FOOD TECHNOLOGY SERVICE INC.


by:
     -----------------------------------
     Sam Whitney, Chairman

cc:  Ben Butler



                                                      July 2, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 31,250 shares at U.S. $.80 in the capital of FTSI as a result
of your $25,000 investment of July 2, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



                                                      July 26, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $30,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 37,500 shares at U.S. $.80 in the capital of FTSI as a result
of your $30,000 investment of July 26, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



16 August, 1996



Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City
Florida  33566

Attention:   Mr. Sam Whitney
             Acting Chairman


Dear Sir:

Nordion International Inc. ("Nordion") agrees to pay and forward as per your
request and on behalf of Food Technology Service, Inc. ("FTSI") the sums of
$47,100.47 and $25,184.05 U.S., forming a total $72,284.52 U.S., respecting
tangible personal property taxes (1995) and real estate taxes (1995) past due by
FTSI to Polk County authority, Florida (made payable to Jack Fouts, Tax
Collector).

In consideration of such payment of $72,284.52 U.S. FTSI agrees to sell and
issue to Nordion 90,355 shares ($0.80 U.S. per share) in the common stock of
FTSI.

If in agreement, please sign in the space provided below.

                                           Yours truly,
                                           NORDION INTERNATIONAL INC.



                                           by:
                                               ---------------------------------



The foregoing is acknowledged
and agreed this 19th day of
August, 1996

FOOD TECHNOLOGY SERVICE INC.,


by:
    --------------------------------------
    Acting Chairman of the Board and CEO



                                                      September 10, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 31,250 shares at U.S. $.80 in the capital of FTSI as a result
of your $25,000 investment of September 10, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



                                                      26 September, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $3,741.05 re Stock Certificates.

We appreciate your participation in our organization and this letter confirms
your ownership of 4,676 shares at U.S. $.80 in the capital of FTSI as a result
of your $3,741.05 investment of September 26, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



September 30, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Sam Whitney/Chairman

RE:  Conversion of Nordion International Inc.'s ("Nordion") accrued interest on
     Indebtedness of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at September 30, 1996. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $0.80 (U.S.). FTSI shall issue a
share certificate to Nordion representing such shares. As at September 30, 1996,
$82,272.41 (U.S.) of interest has accrued and is outstanding on FTSI's
indebtedness to Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,




- --------------------------------------
Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 30th day of September 1996.

     FOOD TECHNOLOGY SERVICE INC.


by:
     ----------------------------------
     Sam Whitney, Chairman

cc:  B. Moffat
     N. Gotfrit
     B. Butler



                                                      October 11, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at U.S. $.80 in the capital of FTSI as a result
of your $20,000 investment of October 11, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



                                                      November 7, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at U.S. $.80 in the capital of FTSI as a result
of your $20,000 investment of November 7, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



                                                      December 9, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $25,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 31,250 shares at U.S. $.80 in the capital of FTSI as a result
of your $25,000 investment of December 9, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Sam Whitney, Chairman


cc:  B. Butler
     C. McGuire



                                                      December 16, 1996

Mr. Frank Fraser
Nordion International Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $18,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 22,500 shares at U.S. $.80 in the capital of FTSI as a result
of your $18,000 investment of December 16, 1996.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Pete Ellis, President & CEO


cc:  S. Whitney
     B. Butler
     C. McGuire



December 31, 1996

Pete Ellis
FTSI
502 Prairie Mine Road
Mulberry, Florida, U.S.A.
33860


Attention:  Mr. Pete Ellis/President CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $190,000 (U.S.) of FTSI's indebtedness to Nordion as at Dec. 31,
1996. This conversion shall be effected at a price per share of $0.80 (U.S.).
FTSI shall issue a share certificate to Nordion representing such shares
(237,500 shares).

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,




- -------------------------------------------
Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 17th day of March 1997.

     FOOD TECHNOLOGY SERVICE INC.


by:
     --------------------------------------
     Pete Ellis, President & CEO

cc:  B. Butler
     B. Moffat



December 31, 1996

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Pete Ellis/President CEO

RE:  Conversion of MDS Nordion's ("Nordion") accrued interest on Indebtedness
     of Food Technology Service, Inc. ("FTSI")


Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at Dec. 31, 1996. The conversion of such interest into shares of FTSI
shall be effected at a price per share of $.80 (U.S.). FTSI shall issue a share
certificate to Nordion representing such shares. As at Dec. 31, 1996, $82,272.41
(U.S.) of interest has accrued and is outstanding on FTSI's indebtedness to
Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,




- -------------------------------------------
Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 22th day of June 1997.

     FOOD TECHNOLOGY SERVICE INC.


by:
     --------------------------------------
     Pete Ellis, President & CEO

cc:  Bill Moffat
     Ben Butler



                                                      January 13, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $15,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 18,750 shares at U.S. $.80 in the capital of FTSI as a result
of your $15,000 investment of January 13, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Pete Ellis, President & CEO


cc:  S. Whitney
     B. Butler
     C. McGuire



                                                      February 7, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at U.S. $.80 in the capital of FTSI as a result
of your $20,000 investment of February 7, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Pete Ellis, President & CEO


cc:  S. Whitney
     B. Butler
     C. McGuire



                                                      February 28, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated


Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of U.S. $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at U.S. $.80 in the capital of FTSI as a result
of your $20,000 investment of February 28, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                           by:
                                               ---------------------------------
                                               Pete Ellis, President & CEO


cc:  S. Whitney
     B. Butler
     C. McGuire



March 13, 1997

FTSI
502 Prairie Mine Road
Mulberry, Florida, U.S.A.
33860


Attention:  Mr. Pete Ellis

Dear Sir:

MDS Nordion ("Nordion") agrees to pay and forward as per your request and on
behalf of Food Technology Service, Inc. ("FTSI") the sums of $51,604.04 and
$22,177.41 U.S., forming a total $73,781.45 U.S., respecting tangible personal
property taxes (1995) and real estate taxes (1995) past due by FTSI to Polk
County authority, Florida (made payable to Joe G. Tedder, Polk County Tax
Collector).

In consideration of such payment of $73,781.45 U.S. FTSI agrees to sell and
issue to Nordion 92,227 shares ($0.80 U.S. per share) in the common stock of
FTSI.

If in agreement, please sign in the space provided below.

                                           Yours very truly,
                                           MDS NORDION



                                           by:
                                               ---------------------------------
                                              Frank M. Fraser
                                              Vice President, Market Development



The foregoing is acknowledged and agreed
this 14 day of March, 1997

FOOD TECHNOLOGY SERVICE INC.,


by:
     --------------------------------------
     Pete Ellis
     President and CEO



March 13, 1997

Mr. Pete Ellis
FTSI
502 Prairie Mine Road
Mulberry, Florida U.S.A.
33860


Dear Sir,

Further to our letter of April 2, 1996, a copy of which is enclosed, Nordion
agrees to further extend payment of the debt owed by FTSI to January 4, 1998
based upon the terms set out in that letter.

                                           Yours very truly,
                                           MDS NORDION


                                      by:  F.M. Fraser
                                           Vice-President, Market Development


The foregoing is acknowledged and agreed this 17 day of March, 1997.

FOOD TECHNOLOGY SERVICE, INC.


by:
     --------------------------------------
     Pete Ellis
     President/CEO FTSI



March 14, 1997


FTSI
502 Prairie Mine Road
Mulberry, Florida U.S.A.
33860


Attention:  Pete Ellis

Dear Sir,

Please acknowledge that the signed agreement dated Dec. 31, 1996, referring to
MDS Nordion's Indebtedness of FTSI, converting the amount of $68,000 to shares,
has been destroyed.

The attached agreement converting $190,000 to shares should replace it.

                                           Yours truly,

                                           MDS NORDION



                                      by:
                                           ------------------------------------
                                           Frank M. Fraser
                                           Vice President, Market Development


The foregoing is acknowledged and agreed
this 14 day of March, 1997

FOOD TECHNOLOGY SERVICE INC.,


by:
    --------------------------------
    Pete Ellis
    President and CEO



                                                      March 17, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Good Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $18,500.

We appreciate your participation in our organization and this letter confirms
your ownership of 23,125 shares at US $.80 in the capital of FTSI as a result of
your $18,500 investment of March 17, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO

cc:  B. Butler
     C. McGuire



March 31, 1997

Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:  Mr. Pete Ellis/President, CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $120,000 (U.S.) of FTSI's indebtedness to Nordion as at March
31, 1997. This conversion shall be effected at a price per share of $0.80 (US).
FTSI shall issue a share certificate to Nordion representing such shares
(150,000 shares).

<PAGE>

Food Technology Service, Inc.                                                  2
March 31, 1997



By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development



The foregoing is acknowledged and agreed this 20 day of May 1997.

FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler



March 31, 1997

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566

Attention:  Mr. Pete Ellis/President, CEO

RE: Conversion of MDS Nordion's ("Nordion") accrued interest on Indebtedness of
Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at March 31, 1997. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $.80 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at March 31, 1997,
$88,258.50 (US) of interest has accrued and is outstanding on FTSI's
indebtedness to Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 8 day of May 1997.

FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO

cc:  Brian Gilhooly
     Ben Butler




                                                      16 April, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $15,000.00.

We appreciate your participation in our organization and this letter confirms
your ownership of 18,750 shares at US $.80 in the capital FTSI as a result of
your $15,000 investment of April 16, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      June 3, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $13,000.00.

We appreciate your participation in our organization and this letter confirms
your ownership of 16,250 shares at US $.80 in the capital FTSI as a result of
your $13,000 investment of June 3, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      June 13, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of June 13, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



June 30, 1997

Food Technology Service, Inc.
1801 Thonotosassa Road
Plant City, Florida
33566


Attention:  Mr. Pete Ellis/President CEO

RE:  Conversion of MDS Nordion's ("Nordion") accrued interest on Indebtedness of
     Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at June 30, 1997. The conversion of such interest into shares of FTSI
shall be effected at a price per share of $.80 (US). FTSI shall issue a share
certificate to Nordion representing such shares. As at June 30, 1997, $77,002.94
(US) of interest has accrued and is outstanding on FTSI's indebtedness to
Nordion.

<PAGE>

By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development

The foregoing is acknowledged and agreed this 18 day of August 1997.

FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO

cc:  Brian Gilhooly
     Ben Butler



                                                      4 July, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of July 4, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      17 July, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of 17 July, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      31 July, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of 31 July, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      26 August, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of 26 August, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



22 September, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.00.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of September 22, 1997.

                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



September 30, 1997

Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:  Mr. Pete Ellis/President, CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $100,000 (U.S.) of FTSI's indebtedness to Nordion as at
September 30, 1997. This conversion shall be effected at a price per shares of
$0.80 (US). FTSI shall issue a share certificate to Nordion representing such
shares (125,000 shares).

<PAGE>

Conversion of Indebtedness of FTSI                                        Page 2
September 30, 1997



By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development



The foregoing is acknowledged and agreed this 30 day of Sept 1997.

FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler



September 30, 1997

Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:  Mr. Pete Ellis/President, CEO

RE:  Conversion of MDS Nordion's ("Nordion") Accrued Interest on Indebtedness of
     Food Technology Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally. We wish to extend our involvement with
FTSI and by this letter, request conversion of outstanding interest into equity.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrued on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, all interest accrued and outstanding on FTSI's indebtedness to
Nordion as at Sept. 30, 1997. The conversion of such interest into shares of
FTSI shall be effected at a price per share of $.80 (US). FTSI shall issue a
share certificate to Nordion representing such shares. As at Sept. 30, 1997,
$77,003.00 (US) of interest ha accrued and is outstanding on FTSI's indebtedness
to Nordion.

<PAGE>

Conversion of Accrued Interest on Indebtedness                            Page 2
September 30, 1997



By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned interest into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development



The foregoing is acknowledged and agreed this 30 day of Sept. 1997.

FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler



October 3, 1997

Mr. Frank Fraser
MDS Nordion Inc.
447 March Road
Kanata, Ontario
K2K 1X8

Reference:  Equity Investments in Food Technology Services Incorporated

Dear Sir:

Thank you for your subscription in our corporation and payment in full in the
amount of US $20,000.00.

We appreciate your participation in our organization and this letter confirms
your ownership of 25,000 shares at US $.80 in the capital FTSI as a result of
your $20,000 investment of October 3, 1997.


                                           Yours very truly,
                                           Food Technology Services Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



November 3, 1997

Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:  Mr. Pete Ellis/President, CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $1,000,000,000 (U.S.) of FTSI's indebtedness to Nordion as at
November 3, 1997. This conversion shall be effected at a price per shares of
$0.80 (US). FTSI shall issue a share certificate to Nordion representing such
shares (1,250,000 shares).

<PAGE>

Conversion of Indebtedness                                                Page 2
November 3, 1997



By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,



Frank M. Fraser
Vice President, Market Development



The foregoing is acknowledged and agreed this 3 day of Nov. 1997.


FOOD TECHNOLOGY SERVICE INC.

by:
     --------------------------------------
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit




                                                      November 10, 1997

Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:  Equity Investments in Food Technology Services Inc.

Dear Sir:

We acknowledge receipt of US $12,000 on November 4, 1997.

We appreciate your participation in our organization and this letter confirms
that your ability to convert this $12,000 loan into 15,000 shares at US $0.80 in
the capital of FTSI be at your option.


                                           Yours very truly,
                                           Food Technology Services, Inc.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



                                                      November 10, 1997

Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:  Equity Investments in Food Technology Services Inc.

Dear Sir:

We acknowledge receipt of US $18,000 on November 4, 1997.

We appreciate your participation in our organization and this letter confirms
that your ability to convert this $18,000 loan into 22,500 shares at US $0.80 in
the capital of FTSI be at your option.


                                           Yours very truly,
                                           FOOD TECHNOLOGY SERVICES, INC.



                                      by:
                                           -------------------------------------
                                           Pete Ellis, President & CEO


cc:  B. Butler
     C. McGuire



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness





                                                      November 18, 1997



Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         We acknowledge receipt of US $25,000 on November 18, 1997.

         We appreciate your participation in our organization and this letter
confirms that your ability to convert this $25,000 loan into 31,250 shares at US
$0.80 in the capital of FTSI be at your option.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                             Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness





                                                      December 5, 1997



Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         We acknowledge receipt of US $20,000 on December 5, 1997.

         We appreciate your participation in our organization and this letter
confirms that your ability to convert this $20,000 loan into 25,000 shares at US
$0.80 in the capital of FTSI be at your option.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                             Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire



MDS Nordion
    Science Advancing Health




12 December, 1997


Mr. Pete Ellis
President & CEO
Food Technology Service, Inc. (FTSI)
502 Prairie Mine Road
Mulberry
FL 33860

Dear Sir,

Further to our letter of March 13, 1997, a copy of which is enclosed, MDS
Nordion agrees to further extend payment of the debt owned by FTSI to January 4,
1999 based upon the terms set out in that letter, and subject to MDS Nordion's
right to convert the debt into equity of FTSI, at any time.

                                        Yours very truly,



                                        Frank M. Fraser
                                        Vice President
                                        Market Development Division



We acknowledge and concur with the foregoing
this 15th day of December 1997
Food Technology Service, Inc.


by:
     Pete Ellis
     President/CEO FTSI




FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness

                                                    December 19, 1997

Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:  Equity Investments in Food Technology Service, Inc.
            ---------------------------------------------------

Dear Frank:

       We acknowledge receipt of US $20,000 on December 19, 1997.

       We appreciate your participation in our organization and this letter
confirms that your ability to convert this $20,000 loan into 25,000 shares at US
$0.80 in the capital of FTSI be at your option.

                                          Yours very truly,
                                          FOOD TECHNOLOGY SERVICE, INC.


                                          by: /s/ Pete Ellis
                                              --------------------------------
                                              Pete Ellis, President & CEO


cc: B. Butler
    C. McGuire



MDS Nordion
    Science Advancing Health




December 29, 1997


Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:   Mr. Pete Ellis/President and CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $1,000,000.00 (U.S.) of FTSI's indebtedness to Nordion as of
December 29, 1997. This conversion shall be effected at a price per share of
$0.80 (US). FTSI shall issue a share certificate to Nordion representing such
shares (1,250,000 shares).

<PAGE>

Conversion of Indebtedness of FTSI
December 29, 1997


By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.

Yours very truly,


Frank M. Fraser
Vice President, Market Development


The foregoing is acknowledged and agreed this 29th day of December 1997.


     FOOD TECHNOLOGY SERVICE, INC.



by:
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit



MDS Nordion
Science Advancing Health




December 29, 1997


Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:   Mr. Pete Ellis/President and CEO

RE:  Conversion of MDS Nordion's ("Nordion") Indebtedness of Food Technology
     Service, Inc. ("FTSI")

Dear Sir:

As you know, Nordion is committed to food irradiation and has provided support
to ensure the ongoing success of FTSI. We have provided marketing assistance,
technical advice and expertise generally.

Reference is made to the Letter Agreement dated November 23, 1994 between FTSI
and Nordion providing amongst other things, the interest rate applicable to the
entire indebtedness owing by FTSI to Nordion.

Pursuant to such Letter Agreement interest accrues on all outstanding
indebtedness owed to FTSI to Nordion at the Barnett Bank (Florida) U.S. prime
rate in effect from time to time plus 1%. Such Agreement further provides for
Nordion's entitlement to convert all or any portion of FTSI's indebtedness to
Nordion, into shares of FTSI.

Nordion hereby provides notice to FTSI, that it desires to convert into common
shares of FTSI, $600,000.00 (U.S.) of FTSI's indebtedness to Nordion as of
December 29, 1997. This conversion shall be effected at a price per share of
$0.80 (US). FTSI shall issue a share certificate to Nordion representing such
shares (750,000 shares).


<PAGE>


Conversion of Indebtedness of FTSI
December 29, 1997


By signing this Letter Agreement, FTSI agrees to the conversion of the
aforementioned amount into common shares of FTSI.


Yours very truly,


Frank M. Fraser
Vice President, Market Development


The foregoing is acknowledged and agreed this 29 day of December 1997.


     FOOD TECHNOLOGY SERVICE, INC.



by:
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness




                                                      January 9, 1998



Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         We acknowledge receipt of US $20,000 on January 9, 1998.

         We appreciate your participation in our organization and this letter
confirms that your ability to convert this $20,000 loan into 25,000 shares at US
$0.80 in the capital of FTSI be at your option.






                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



MDS Nordion
    Science Advancing Health



                                                     2 February, 1998


Food Technology Service, Inc.(FTSI)
502 Prairie Mine Rd.
Mulberry
Florida, 33860
U.S.A.

Attention:   Mr. Pete Ellis/President and CEO

Reference:   Short Term Cash Advance

Dear Sir:

As you know, MDS Nordion is committed to food irradiation and has provided
support to ensure the ongoing success of FTSI.

As requested, MDS Nordion will forward to FTSI US$10,000 to cover expenses until
such time that FTSI receives funds from its private placement. It is expected
that FTSI will repay this US$10,000 cash advance to MDS Nordion within 5 working
days after receipt of funds but the advance will otherwise be in accordance with
our existing agreements.

Yours very truly,


Frank M. Fraser
Vice President
Market Development Division

<PAGE>

To Mr. Pete Ellis
Short Term Cash Advance

2 February, 1998


The foregoing is acknowledged and agreed this 2nd day of February 1998.


     FOOD TECHNOLOGY SERVICE, INC.



by:
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit



MDS Nordion
    Science Advancing Health




                                                      12 February, 1998



Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry
Florida, 33860
U.S.A.

Attention:   Mr. Pete Ellis/President and CEO

Reference:   Short Term Cash Advance

Dear Sir:

As you know, MDS Nordion is committed to food irradiation and has provided
support to ensure the ongoing success of FTSI.

As requested, MDS Nordion will forward to FTSI US$20,000 to cover expenses until
such time that FTSI receives funds from its private placement. It is expected
that FTSI will repay this US$20,000 cash advance to MDS Nordion within 5 working
days after receipt of funds but the advance will otherwise be in accordance with
our existing agreements.

Yours very truly,


Frank M. Fraser
Vice President
Market Development Division

<PAGE>


To Mr. Pete Ellis
Short Term Cash Advance
12 February, 1998


The foregoing is acknowledged and agreed this 12nd day of February 1998.


     FOOD TECHNOLOGY SERVICE, INC.



by:
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      March 9, 1998


Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         We acknowledge receipt of US $75,000 on March 9, 1998.

         We appreciate your participation in our organization and this letter
confirms that your ability to convert this $75,000 loan into 93,750 shares at US
$0.80 in the capital of FTSI be at your option.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



MDS Nordion
    Science Advancing Health



                                                      13 March, 1998



Food Technology Service, Inc. (FTSI)
502 Prairie Mine Road
Mulberry
Florida, 33860, U.S.A.

Attention:   Mr. Pete Ellis/President and CEO

Dear Sir:

Further to our recent discussions, this letter confirms that the conversion rate
that has been agreed to for loans to the company since August 1, 1997 in the
amount of US$300,000.00 would be at 70% of the closing price on the last trade
date prior to exercise of the conversion right. This conversion rate will apply
to such amounts in lieu of the US$0.80 described in the previous correspondence
provided when each advance was provided. The loans are otherwise in accordance
with the prior arrangements with respect to security and other matters.

Yours truly,


Frank M. Fraser
Vice President
Market Development Division


The foregoing is acknowledged and agreed this 13th day of March 1998.


     FOOD TECHNOLOGY SERVICE, INC.



by:
     Pete Ellis, President & CEO


cc:  Brian Gilhooly
     Ben Butler
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness





                                                      April 3, 1998



Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         Food Technology Service, Inc. hereby confirms the loan of $20,731.85 US
made to FTSI by Nordion, on the 3rd day of April 1998. This letter confirms that
the foregoing loan and accrued interest is convertible at Nordion's option into
common stock of FTSI, at 70% of the closing price on the last trade date prior
to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      April 9, 1998



Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         Food Technology Service, Inc. hereby confirms the loan of $15,000.00 US
made to FTSI by Nordion, on the 9th day of April 1998. This letter confirms that
the foregoing loan and accrued interest is convertible at Nordion's option into
common stock of FTSI, at 70% of the closing price on the last trade date prior
to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      April 24, 1998


Mr. Frank Fraser
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Frank:

         Food Technology Service, Inc. hereby confirms the loan of $15,000.00 US
made to FTSI by Nordion, on the 24th day of April 1998. This letter confirms
that the foregoing loan and accrued interest is convertible at Nordion's option
into common stock of FTSI, at 70% of the closing price on the last trade date
prior to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness




                                                      May 8, 1998



Mr. Craig Hunter
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Craig:

         Food Technology Service, Inc. hereby confirms the loan of $20,000.00 US
made to FTSI by Nordion, on the 8th day of May 1998. This letter confirms that
the foregoing loan and accrued interest is convertible at Nordion's option into
common stock of FTSI, at 70% of the closing price on the last trade date prior
to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      June 12, 1998



Mr. Craig Hunter
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Craig:

         Food Technology Service, Inc. hereby confirms the loan of $25,000.00 US
made to FTSI by Nordion, on the 12th day of June 1998. This letter confirms that
the foregoing loan and accrued interest is convertible at Nordion's option into
common stock of FTSI, at 70% of the closing price on the last trade date prior
to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      August 28, 1998



Mr. Craig Hunter
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Reference:   Equity Investments in Food Technology Service, Inc.

Dear Craig:

         Food Technology Service, Inc. hereby confirms the loan of $10,000.00 US
made to FTSI by Nordion, on the 28th day of August 1998. This letter confirms
that the foregoing loan and accrued interest is convertible at Nordion's option
into common stock of FTSI, at 70% of the closing price on the last trade date
prior to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        by:
                                            Pete Ellis, President & CEO



cc:  B. Butler
     C. McGuire
     N. Gotfrit



FOOD TECHnology Service, Inc.
Dedicated to Preventing Food-Borne Illness



                                                      October 23, 1998


Mr. Craig Hunter
MDS Nordion
447 March Road
Kanata, Ontario K2K 1X8

Dear Craig:

         Food Technology Service, Inc. (FTSI) is in the process of obtaining a
line of credit to cover operating cash needs of its business. MDS Nordion has
agreed to provide a temporary bridge loan to meet immediate cash needs until
this line of credit is in place.

         FTSI hereby confirms the bridge loan of $15,000.00 US made to FTSI by
Nordion, on the 23rd day of October 1998. This letter confirms that the
foregoing loan and accrued interest is convertible at Nordion's option into
common stock of FTSI, at 70% of the closing price on the last trade date prior
to exercise of the conversion right of Nordion. FTSI acknowledges that the
foregoing loan and accrued interest may be called for repayment by Nordion at
any time upon demand. With the exception of the conversion option as noted
above, this loan is otherwise in accordance with the previous arrangements with
respect to security, rate of interest, and other matters.

                                        Yours very truly,
                                        FOOD TECHNOLOGY SERVICE, INC.



                                        Pete Ellis
                                        President & CEO



MDS Nordion
    Science Advancing Health



October 23, 1998



Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry, Florida, 33860
U.S.A.

RE:  Fleet National Bank Guarantee

Dear Pete:

This letter confirms Food Technology Service, Inc.'s ("FTSI") agreement to repay
to MDS Nordion Inc. ("Nordion") upon demand, all sums including interest or
penalties paid by Nordion to Fleet National Bank or other financial institution
(the "Bank"), from time to time, under the guarantee provided to the Bank by
Nordion, with respect to the line of credit in favour of FTSI. Prior to each
draw upon the line of credit, FTSI shall first obtain Nordion's prior written
consent.

All outstanding amounts owed by FTSI to Nordion pursuant to such guarantee will
accrue interest at the Barnett Bank (Florida), U.S. prime interest rate in
effect from time to time, plus 1% and shall be subject to previous arrangements
with respect to security for repayment of FTSI indebtedness to Nordion. FTSI
further agrees that any amount and any accrued interest hereunder owing to
Nordion is convertible at Nordion's option into common stock of FTSI at 70% of
the closing price on the last trade date prior to exercise of the conversion
right of Nordion. FTSI further agrees to pay a standby fee annually to Nordion
in the amount of .1% of the maximum amount guaranteed (currently $300,000 US).

Yours very truly,

MDS NORDION INC.


by:

The foregoing is acknowledged and agreed this 26th day of October 1998.

FOOD TECHNOLOGY SERVICE, INC.


by:
     Pete Ellis, President & CEO

cc:  Ben Butler
     Brian Gilhooly
     Mike Thomas



                   Unlimited Guaranty and Indemnity Agreement

                  This Agreement is made between the Guarantor and FLEET
NATIONAL BANK (the "Bank"), and in consideration of the extension, modification,
or renewal of credit or forbearance by Bank to Food Technology Service, Inc.
whose address is 502 Prairie Mine Road, Mulberry, Florida 33860 (the "Debtor").

1. GUARANTY. The Guarantor hereby unconditionally guarantees to Bank the payment
when due, by acceleration or otherwise, of all indebtedness, liabilities and
obligations of Debtor to Bank of every kind and nature whether absolute or
contingent (including liability pursuant to any guarantee or endorsement by
Debtor), direct or indirect, primary or secondary, joint or several), and
whether heretofore or hereafter created, arising or existing or at any time due
and owing from Debtor to Bank including without limitation the payment of all
bills, notes, checks, drafts, trade acceptances and other evidences of debt upon
or by reason of which Debtor may or shall be liable or obligated to Bank as
maker, drawer, endorser, acceptor or otherwise in any manner whatsoever
(collectively the "Indebtedness"). The obligations under this Agreement are
without limitation as to amount, unless specifically restricted or limited in
the Special Provisions section of this Agreement. Further, the obligations under
this Agreement are cumulative and in addition to obligations under any other
guaranty or indemnity previously given by the Guarantor to Bank and not
terminated in writing by Bank.

2. UNCONDITIONAL ABSOLUTE GUARANTY. The Guarantor's liability hereunder shall be
direct, immediate and absolute and shall not be conditioned or contingent upon
the pursuit, exercise or prosecution by the Bank of any remedies, and the Bank
shall have and may exercise against the Guarantor any and all of the rights and
remedies that it might exercise against a principal debtor upon a past due and
liquidated obligation. This instrument shall constitute an unconditional,
continuing guarantee independent of and in addition to any other security,
collateral, endorsement or guarantee held by the Bank for the Indebtedness or
any part thereof. The liability of the Guarantor hereunder shall not be
impaired, altered or otherwise affected by (i) the taking of or release of any
other or additional security for or guarantee of the Indebtedness or any part
thereof, (ii) any neglect, failure or omission to hold, perfect, protect or rely
on or realize upon any such other or additional security or guarantee, (iii) any
extension of credit in excess of the limit, if any, of this guarantee, (iv) any
renewal, extension, modification, compounding, compromise, payment, replacement
or discharge of the Indebtedness or any part thereof or (v) any other act,
failure to act, or thing whatsoever, which but for this Section 2 would
constitute a release of any obligations of the Guarantor, and all of which the
Guarantor hereby consents to without notice to the Guarantor.

         Any payment of principal or interest, acknowledgment, promise or other
act by or on behalf of the Debtor, the effect of which would take any right
which the Bank may have against Debtor out of the operation of any statute of
limitations shall have a like effect with respect to the right which the Bank
may have hereunder against the Guarantor notwithstanding the Guarantor's lack of
notice thereof or consent thereto.

         The Guarantor waives notice of acceptance of this guarantee; notice
that any Indebtedness has been incurred; presentment, demand, protest, notice of
dishonor of any note or Indebtedness; or notice to the Guarantor, Debtor, or any
other person, of Debtor's default. The Guarantor authorizes the Bank in its sole
discretion to direct the order or manner of the disposition of the collateral
and the enforcement of any and all endorsements and guaranties relating to the
Indebtedness. Any payments or credits received from Debtor, Guarantor, or any
other source may be applied to the Indebtedness in whatever order or manner Bank
elects.

3. INDEMNITY. The Guarantor hereby agrees to indemnify the Bank and hold it
harmless from and against any and all losses, expenses and damages incurred by
the Bank in connection with or as a result of the assertion of any and all
claims for the return of moneys (including the proceeds of any collateral)
received or applied by the Bank in partial or full payment of the Indebtedness,
including without limitation all other applicable laws, or that the payment of
such moneys or the giving of such collateral to the Bank constituted a
preference or fraudulent transfer under the Bankruptcy Code or any other
applicable statute. This indemnity shall extend to and include all moneys
recovered from or paid over by the Bank as a result of such claims, regardless
of the basis thereof, and all costs and expenses including reasonable attorneys
fees incurred by the Bank in investigation, evaluating and contesting such
claims, regardless of the outcome. The Guarantor's liability pursuant to this
Section 3 shall survive any termination of this Agreement to the extent of all
moneys (including proceeds of any collateral) received by the Bank on account of
that portion of the Indebtedness (and any renewals, modifications or extensions
thereof, or replacements therefor, whether made before or after such
termination) for which the Guarantor under the terms of this agreement remains
liable notwithstanding such termination, whether such moneys are recovered from,
or paid over by, the Bank before or after such termination. The indemnity
provided by this paragraph is in addition to the guarantee set forth elsewhere
in this Agreement, and shall be limited only to the extent that the Guarantor's
liability hereunder is limited in the Special Provisions section of this
Agreement.

4. TERMINATION. The liability of the Guarantor under this agreement may be
terminated to the extent hereinafter permitted only (i) if the Debtor has no
outstanding obligations to Bank, Bank has no continuing commitments to lend to
Debtor, and Bank receives written notice of the Guarantor's intent to terminate
this agreement signed by the Guarantor, (ii) upon the written agreement of the
Bank, or (iii) upon the Bank's receiving written notice of the death of the
Guarantor if the Guarantor is an individual. Any termination of the Guarantor's
liability under this Agreement shall be effective only as to the portion of the
Indebtedness not committed by the Bank prior to or created or arising subsequent
to such termination and provided further that this Agreement and the Guarantor's
liability hereunder shall remain in full force and effect with respect to the
portion of the Indebtedness committed, created, arising or existing prior to
such termination and to all renewals, extensions and modifications thereof,
whether made before or after such termination.

         If there are more than one Guarantor, including guarantors of the
Indebtedness under separate agreements, the liability hereunder of any of them
may be terminated in the manner and to the extent provided above, but the
liability of those of the Guarantor whose liability hereunder is not terminated
shall continue in full force and effect as though executed only by those of the
Guarantor remaining.

         The payment in full of all Indebtedness outstanding at any time shall
not discharge or otherwise affect the Guarantor's liability hereunder with
respect to Indebtedness thereafter created or arising prior to the termination
of such liability as herein provided, unless this Agreement is otherwise
terminated as provided herein.

5. SECURITY. The Bank shall have a security interest in and right of setoff with
respect to all deposits or other sums credited by and due from the Bank to the
Guarantor and a security interest in all securities or other property of the
Guarantor in the Bank's possession for safekeeping or otherwise. The Bank's
security interests shall secure payment of all obligations under this Agreement
and the payment and performance of all other obligations of the Guarantor to the
Bank, whether direct or indirect, absolute or contingent, due or to become due,
now existing or hereafter arising. In the event any obligation becomes due under
this Agreement, regardless of the adequacy of collateral and without any demand
or notice, except a required by applicable law, the Bank may apply or setoff
such deposits or other sums and may sell or dispose of any or all of such
securities or other property and may exercise any and all rights it may have
under the New York Uniform Commercial Code, as in effect form time to time. The
rights of the Bank under this Agreement are in addition to, and not exclusive
of, any other rights it may have with respect to such deposits, sums,
securities, or other property under other agreements or applicable principles of
law. The Bank shall have no duty to take steps to preserve rights against prior
parties as to such securities or other property. Borrower and any Guarantor
hereby grant to Bank, a lien, security interest and right of setoff as security
for all liabilities and obligations to Bank, whether now or existing or
hereafter arising, upon and against all deposits, credits, collateral and
property, now or hereafter in the possession, custody, safekeeping or control of
Bank or any entity under control of Fleet Financial Group, Inc., or in transit
to any of them. At any time, without demand or notice, Bank may set off the same
or any part thereof and apply the same to any liability or obligation of
Borrower and any Guarantor even though unmatured and regardless of the adequacy
of any other collateral securing the Loan. ANY AND ALL RIGHTS TO REQUIRE BANK TO
EXERCISE ITS RIGHTS OR REMEDIES WITH RESPECT TO ANY OTHER COLLATERAL WHICH
SECURES THE LOAN, PRIOR TO EXERCISING ITS RIGHT OF SETOFF WITH RESPECT TO SUCH
DEPOSITS, CREDITS OR OTHER PROPERTY OF THE BORROWER OR ANY GUARANTOR, ARE HEREBY
KNOWINGLY, VOLUNTARILY AND IRREVOCABLY WAIVED.

6. GUARANTY OBLIGATIONS DUE. In case of (i) the death, legal incapacity,
insolvency, liquidation, dissolution, merger, consolidation, or other change of
organizational structure of the Guarantor, (ii) suspension of the usual business
of the Guarantor, (iii) institution of bankruptcy proceedings or other
proceedings of any kind for the relief or collection of debt by or against the
Guarantor (including, without limitation, assignments for the benefit of
creditors, appointment of trustees, receivers, or custodians for a material part
of the Guarantor's assets, levies upon or attachments of assets, the filing of
judgments not fully insured or bonded or removed within thirty days, or the
filing of tax liens), (iv) transfer of a material portion of the assets of the
Guarantor, (v) any financial statement or information furnished by the Guarantor
to Bank having been false or misleading in any material respect as of the date
furnished, (vi) default (after applicable grace and cure periods) by the
Guarantor under any other agreement between the Guarantor and the Bank, (vii)
any default or other reason by which the Indebtedness shall have become due and
payable, the Indebtedness at the option of the Bank shall become immediately due
and payable by the Guarantor irrespective of any other contract or agreement
fixing the date of maturity.

7. FINANCIAL INFORMATION. From time to time, but no less often than annually,
the Guarantor shall provide the Bank with such financial statements, copies of
tax returns, and other information as, and in the form, the Bank may request.

8. COSTS OF COLLECTION. The Guarantor on demand shall pay all expenses of the
Bank, including without limitation reasonable attorney's fees, in connection
with enforcement and collection of the Indebtedness and obligations under this
Agreement.

9. SUBROGATION. Until such time as the Guarantor's obligation under this
agreement are fully and irrevocably paid in full, the Guarantor hereby
irrevocably waives any claims or rights, including, without limitation, any
right of subrogation, which the Guarantor may now possess or subsequently
acquire against the Debtor or its bankruptcy estate, arising from the
Guarantor's execution of, or payment under, this Agreement, and the Guarantor
agrees that in such instances it shall have no recourse, at law or in equity
against Debtor or its bankruptcy estate arising from any liability imposed upon,
or incurred by, the Guarantor as a result of the Guarantor's execution of this
Agreement.

10. AUTHORIZATION. If the Guarantor is a corporation, partnership or other
organization or association, this agreement is made and entered into by it in
furtherance of its purposes. The execution of this agreement is not contrary to,
or in violation of, its certificate of incorporation, charter or by-laws or any
other agreement or indenture to which it or any of its members is a party or by
which it or its property or its members are bound. The Guarantor and the party
executing this Agreement on its behalf represent to the Bank that the Guarantor
is duly authorized to guarantee the Indebtedness and undertake the within
indemnity.

11. JURISDICTION/WAIVER OF TRIAL BY JURY. The Guarantor agrees that any action
or proceeding to enforce the provisions of the Agreement may be commenced by the
Bank in the New York State Supreme Court in any county, or in the District Court
of the United States in any district in which Bank has an office, and the
Guarantor waives personal service of process and agrees that a summons and
complaint commencing an action or proceeding in any such court shall be properly
served and shall confer personal jurisdiction if served by registered mail to
the Guarantor, or as otherwise provided by the laws of the State of New York or
the United States. BORROWER AND BANK MUTUALLY HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE THE RIGHT TO A TRIAL BY JURY IN RESPECT OF ANY CLAIM BASED
HEREON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THE NOTE OR ANY OTHER LOAN
DOCUMENTS CONTEMPLATED TO BE EXECUTED IN CONNECTION HEREWITH OR ANY COURSE OF
CONDUCT, COURSE OF DEALINGS, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS
OF ANY PARTY. THIS WAIVER CONSTITUTES A MATERIAL INDUCEMENT FOR BANK TO ACCEPT
THE NOTE AND MAKE THE LOAN.

12. MISCELLANEOUS. If there are more than one Guarantor, the representations,
agreements, obligations and liabilities hereunder of the Guarantor shall be
joint and several. This Agreement shall be binding upon the Guarantor, each of
them and their respective heirs, executors, administrators, legal
representatives, successors and assigns, and shall inure to the benefit of the
Bank, and its successors and assigns, including specifically any assignee of all
or any portion of the Indebtedness.

13. SPECIAL PROVISIONS. Obligations under this agreement are limited to
$300,000.00. All requests for borrowings shall be submitted to the Bank by Food
Technology Service, Inc. (Borrower) and must be accompanied by the written
consent of MDS Nordion, Inc.

There are no oral representations, understandings or warranties with respect to
this Agreement. It may not be changed except by written agreement signed by the
Guarantor and the Bank. The Bank's rights and remedies shall not be modified,
limited or waived by any representation, promise or agreement made, or any
course of conduct, by the Bank after the date of this agreement, unless
evidenced by a written document signed by the Bank. If any provision of this
Agreement is declared unenforceable or invalid in whole or in part for any
reason, the remaining provisions shall continue to be effective.

This Agreement shall be governed by the laws of the State of New York.


Date:   October 29, 1998

By:     MDS Nordion Inc.


        -------------------------------

Title:
        -------------------------------

State of New York           )
                             ss.:
County of _______________   )


                           Individual Acknowledgement

         On this ______ day of ________________________, before me, the
subscriber, personally came ___________________________________, to me known to
be the person(s) described in and who executed the foregoing Guaranty, and
acknowledged to me that (s)he/they executed the same.



                                              -----------------------------
                                                      Notary Public



                           Partnership Acknowledgement

         On this ______ day of ________________________, before me personally
came ___________________________________, to me known to be the person(s) who
executed the foregoing Guaranty and who, being duly sworn by me, did depose and
say that (s)he is a General Partner in the partnership described in the
foregoing Guaranty, that (s)he acknowledged to me that (s) he executed the same
as the act and deed of such Partnership.


                                              -----------------------------
                                                      Notary Public


                            Corporate Acknowledgement

         On this ______ day of ________________________, before me, the
subscriber, personally came ___________________________________, to me known,
who, being by me duly sworn, did depose and say that (s) he resides at
___________________________ and that (s)he is the __________________ of
______________________, the Corporation described in and which executed the
above instrument; and that (s)he executed said instrument by order of the Board
of Directors of said Corporation.


                                              -----------------------------
                                                      Notary Public



                   Unlimited Guaranty and Indemnity Agreement

                  This Agreement is made between the Guarantor and FLEET
NATIONAL BANK (the "Bank"), and in consideration of the extension, modification,
or renewal of credit or forbearance by Bank to Food Technology Service, Inc.
whose address is 502 Prairie Mine Road, Mulberry, Florida 33860 (the "Debtor").

1. GUARANTY. The Guarantor hereby unconditionally guarantees to Bank the payment
when due, by acceleration or otherwise, of all indebtedness, liabilities and
obligations of Debtor to Bank of every kind and nature whether absolute or
contingent (including liability pursuant to any guarantee or endorsement by
Debtor), direct or indirect, primary or secondary, joint or several), and
whether heretofore or hereafter created, arising or existing or at any time due
and owing from Debtor to Bank including without limitation the payment of all
bills, notes, checks, drafts, trade acceptances and other evidences of debt upon
or by reason of which Debtor may or shall be liable or obligated to Bank as
maker, drawer, endorser, acceptor or otherwise in any manner whatsoever
(collectively the "Indebtedness"). The obligations under this Agreement are
without limitation as to amount, unless specifically restricted or limited in
the Special Provisions section of this Agreement. Further, the obligations under
this Agreement are cumulative and in addition to obligations under any other
guaranty or indemnity previously given by the Guarantor to Bank and not
terminated in writing by Bank.

2. UNCONDITIONAL ABSOLUTE GUARANTY. The Guarantor's liability hereunder shall be
direct, immediate and absolute and shall not be conditioned or contingent upon
the pursuit, exercise or prosecution by the Bank of any remedies, and the Bank
shall have and may exercise against the Guarantor any and all of the rights and
remedies that it might exercise against a principal debtor upon a past due and
liquidated obligation. This instrument shall constitute an unconditional,
continuing guarantee independent of and in addition to any other security,
collateral, endorsement or guarantee held by the Bank for the Indebtedness or
any part thereof. The liability of the Guarantor hereunder shall not be
impaired, altered or otherwise affected by (i) the taking of or release of any
other or additional security for or guarantee of the Indebtedness or any part
thereof, (ii) any neglect, failure or omission to hold, perfect, protect or rely
on or realize upon any such other or additional security or guarantee, (iii) any
extension of credit in excess of the limit, if any, of this guarantee, (iv) any
renewal, extension, modification, compounding, compromise, payment, replacement
or discharge of the Indebtedness or any part thereof or (v) any other act,
failure to act, or thing whatsoever, which but for this Section 2 would
constitute a release of any obligations of the Guarantor, and all of which the
Guarantor hereby consents to without notice to the Guarantor.

         Any payment of principal or interest, acknowledgment, promise or other
act by or on behalf of the Debtor, the effect of which would take any right
which the Bank may have against Debtor out of the operation of any statute of
limitations shall have a like effect with respect to the right which the Bank
may have hereunder against the Guarantor notwithstanding the Guarantor's lack of
notice thereof or consent thereto.

         The Guarantor waives notice of acceptance of this guarantee; notice
that any Indebtedness has been incurred; presentment, demand, protest, notice of
dishonor of any note or Indebtedness; or notice to the Guarantor, Debtor, or any
other person, of Debtor's default. The Guarantor authorizes the Bank in its sole
discretion to direct the order or manner of the disposition of the collateral
and the enforcement of any and all endorsements and guaranties relating to the
Indebtedness. Any payments or credits received from Debtor, Guarantor, or any
other source may be applied to the Indebtedness in whatever order or manner Bank
elects.

3. INDEMNITY. The Guarantor hereby agrees to indemnify the Bank and hold it
harmless from and against any and all losses, expenses and damages incurred by
the Bank in connection with or as a result of the assertion of any and all
claims for the return of moneys (including the proceeds of any collateral)
received or applied by the Bank in partial or full payment of the Indebtedness,
including without limitation all other applicable laws, or that the payment of
such moneys or the giving of such collateral to the Bank constituted a
preference or fraudulent transfer under the Bankruptcy Code or any other
applicable statute. This indemnity shall extend to and include all moneys
recovered from or paid over by the Bank as a result of such claims, regardless
of the basis thereof, and all costs and expenses including reasonable attorneys
fees incurred by the Bank in investigation, evaluating and contesting such
claims, regardless of the outcome. The Guarantor's liability pursuant to this
Section 3 shall survive any termination of this Agreement to the extent of all
moneys (including proceeds of any collateral) received by the Bank on account of
that portion of the Indebtedness (and any renewals, modifications or extensions
thereof, or replacements therefor, whether made before or after such
termination) for which the Guarantor under the terms of this agreement remains
liable notwithstanding such termination, whether such moneys are recovered from,
or paid over by, the Bank before or after such termination. The indemnity
provided by this paragraph is in addition to the guarantee set forth elsewhere
in this Agreement, and shall be limited only to the extent that the Guarantor's
liability hereunder is limited in the Special Provisions section of this
Agreement.

4. TERMINATION. The liability of the Guarantor under this agreement may be
terminated to the extent hereinafter permitted only (i) if the Debtor has no
outstanding obligations to Bank, Bank has no continuing commitments to lend to
Debtor, and Bank receives written notice of the Guarantor's intent to terminate
this agreement signed by the Guarantor, (ii) upon the written agreement of the
Bank, or (iii) upon the Bank's receiving written notice of the death of the
Guarantor if the Guarantor is an individual. Any termination of the Guarantor's
liability under this Agreement shall be effective only as to the portion of the
Indebtedness not committed by the Bank prior to or created or arising subsequent
to such termination and provided further that this Agreement and the Guarantor's
liability hereunder shall remain in full force and effect with respect to the
portion of the Indebtedness committed, created, arising or existing prior to
such termination and to all renewals, extensions and modifications thereof,
whether made before or after such termination.

         If there are more than one Guarantor, including guarantors of the
Indebtedness under separate agreements, the liability hereunder of any of them
may be terminated in the manner and to the extent provided above, but the
liability of those of the Guarantor whose liability hereunder is not terminated
shall continue in full force and effect as though executed only by those of the
Guarantor remaining.

         The payment in full of all Indebtedness outstanding at any time shall
not discharge or otherwise affect the Guarantor's liability hereunder with
respect to Indebtedness thereafter created or arising prior to the termination
of such liability as herein provided, unless this Agreement is otherwise
terminated as provided herein.

5. SECURITY. The Bank shall have a security interest in and right of setoff with
respect to all deposits or other sums credited by and due from the Bank to the
Guarantor and a security interest in all securities or other property of the
Guarantor in the Bank's possession for safekeeping or otherwise. The Bank's
security interests shall secure payment of all obligations under this Agreement
and the payment and performance of all other obligations of the Guarantor to the
Bank, whether direct or indirect, absolute or contingent, due or to become due,
now existing or hereafter arising. In the event any obligation becomes due under
this Agreement, regardless of the adequacy of collateral and without any demand
or notice, except a required by applicable law, the Bank may apply or setoff
such deposits or other sums and may sell or dispose of any or all of such
securities or other property and may exercise any and all rights it may have
under the New York Uniform Commercial Code, as in effect form time to time. The
rights of the Bank under this Agreement are in addition to, and not exclusive
of, any other rights it may have with respect to such deposits, sums,
securities, or other property under other agreements or applicable principles of
law. The Bank shall have no duty to take steps to preserve rights against prior
parties as to such securities or other property. Borrower and any Guarantor
hereby grant to Bank, a lien, security interest and right of setoff as security
for all liabilities and obligations to Bank, whether now or existing or
hereafter arising, upon and against all deposits, credits, collateral and
property, now or hereafter in the possession, custody, safekeeping or control of
Bank or any entity under control of Fleet Financial Group, Inc., or in transit
to any of them. At any time, without demand or notice, Bank may set off the same
or any part thereof and apply the same to any liability or obligation of
Borrower and any Guarantor even though unmatured and regardless of the adequacy
of any other collateral securing the Loan. ANY AND ALL RIGHTS TO REQUIRE BANK TO
EXERCISE ITS RIGHTS OR REMEDIES WITH RESPECT TO ANY OTHER COLLATERAL WHICH
SECURES THE LOAN, PRIOR TO EXERCISING ITS RIGHT OF SETOFF WITH RESPECT TO SUCH
DEPOSITS, CREDITS OR OTHER PROPERTY OF THE BORROWER OR ANY GUARANTOR, ARE HEREBY
KNOWINGLY, VOLUNTARILY AND IRREVOCABLY WAIVED.

6. GUARANTY OBLIGATIONS DUE. In case of (i) the death, legal incapacity,
insolvency, liquidation, dissolution, merger, consolidation, or other change of
organizational structure of the Guarantor, (ii) suspension of the usual business
of the Guarantor, (iii) institution of bankruptcy proceedings or other
proceedings of any kind for the relief or collection of debt by or against the
Guarantor (including, without limitation, assignments for the benefit of
creditors, appointment of trustees, receivers, or custodians for a material part
of the Guarantor's assets, levies upon or attachments of assets, the filing of
judgments not fully insured or bonded or removed within thirty days, or the
filing of tax liens), (iv) transfer of a material portion of the assets of the
Guarantor, (v) any financial statement or information furnished by the Guarantor
to Bank having been false or misleading in any material respect as of the date
furnished, (vi) default (after applicable grace and cure periods) by the
Guarantor under any other agreement between the Guarantor and the Bank, (vii)
any default or other reason by which the Indebtedness shall have become due and
payable, the Indebtedness at the option of the Bank shall become immediately due
and payable by the Guarantor irrespective of any other contract or agreement
fixing the date of maturity.

7. FINANCIAL INFORMATION. From time to time, but no less often than annually,
the Guarantor shall provide the Bank with such financial statements, copies of
tax returns, and other information as, and in the form, the Bank may request.

8. COSTS OF COLLECTION. The Guarantor on demand shall pay all expenses of the
Bank, including without limitation reasonable attorney's fees, in connection
with enforcement and collection of the Indebtedness and obligations under this
Agreement.

9. SUBROGATION. Until such time as the Guarantor's obligation under this
agreement are fully and irrevocably paid in full, the Guarantor hereby
irrevocably waives any claims or rights, including, without limitation, any
right of subrogation, which the Guarantor may now possess or subsequently
acquire against the Debtor or its bankruptcy estate, arising from the
Guarantor's execution of, or payment under, this Agreement, and the Guarantor
agrees that in such instances it shall have no recourse, at law or in equity
against Debtor or its bankruptcy estate arising from any liability imposed upon,
or incurred by, the Guarantor as a result of the Guarantor's execution of this
Agreement.

10. AUTHORIZATION. If the Guarantor is a corporation, partnership or other
organization or association, this agreement is made and entered into by it in
furtherance of its purposes. The execution of this agreement is not contrary to,
or in violation of, its certificate of incorporation, charter or by-laws or any
other agreement or indenture to which it or any of its members is a party or by
which it or its property or its members are bound. The Guarantor and the party
executing this Agreement on its behalf represent to the Bank that the Guarantor
is duly authorized to guarantee the Indebtedness and undertake the within
indemnity.

11. JURISDICTION/WAIVER OF TRIAL BY JURY. The Guarantor agrees that any action
or proceeding to enforce the provisions of the Agreement may be commenced by the
Bank in the New York State Supreme Court in any county, or in the District Court
of the United States in any district in which Bank has an office, and the
Guarantor waives personal service of process and agrees that a summons and
complaint commencing an action or proceeding in any such court shall be properly
served and shall confer personal jurisdiction if served by registered mail to
the Guarantor, or as otherwise provided by the laws of the State of New York or
the United States. BORROWER AND BANK MUTUALLY HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE THE RIGHT TO A TRIAL BY JURY IN RESPECT OF ANY CLAIM BASED
HEREON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THE NOTE OR ANY OTHER LOAN
DOCUMENTS CONTEMPLATED TO BE EXECUTED IN CONNECTION HEREWITH OR ANY COURSE OF
CONDUCT, COURSE OF DEALINGS, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS
OF ANY PARTY. THIS WAIVER CONSTITUTES A MATERIAL INDUCEMENT FOR BANK TO ACCEPT
THE NOTE AND MAKE THE LOAN.

12. MISCELLANEOUS. If there are more than one Guarantor, the representations,
agreements, obligations and liabilities hereunder of the Guarantor shall be
joint and several. This Agreement shall be binding upon the Guarantor, each of
them and their respective heirs, executors, administrators, legal
representatives, successors and assigns, and shall inure to the benefit of the
Bank, and its successors and assigns, including specifically any assignee of all
or any portion of the Indebtedness.

13. SPECIAL PROVISIONS. Obligations under this agreement are limited to
$500,000.00. All requests for borrowings shall be submitted to the Bank by Food
Technology Service, Inc. (Borrower) and must be accompanied by the written
consent of MDS Nordion, Inc.

There are no oral representations, understandings or warranties with respect to
this Agreement. It may not be changed except by written agreement signed by the
Guarantor and the Bank. The Bank's rights and remedies shall not be modified,
limited or waived by any representation, promise or agreement made, or any
course of conduct, by the Bank after the date of this agreement, unless
evidenced by a written document signed by the Bank. If any provision of this
Agreement is declared unenforceable or invalid in whole or in part for any
reason, the remaining provisions shall continue to be effective.

This Agreement shall be governed by the laws of the State of New York.


Date:    December 17, 1999

By:      MDS Nordion Inc.


        -------------------------------

Title:
        -------------------------------

State of New York           )
                             ss.:
County of _______________   )



                           Individual Acknowledgement

         On this ______ day of ________________________, before me, the
subscriber, personally came ___________________________________, to me known to
be the person(s) described in and who executed the foregoing Guaranty, and
acknowledged to me that (s)he/they executed the same.


                                              -----------------------------
                                                      Notary Public


                           Partnership Acknowledgement

         On this ______ day of ________________________, before me personally
came ___________________________________, to me known to be the person(s) who
executed the foregoing Guaranty and who, being duly sworn by me, did depose and
say that (s)he is a General Partner in the partnership described in the
foregoing Guaranty, that (s)he acknowledged to me that (s) he executed the same
as the act and deed of such Partnership.


                                              -----------------------------
                                                      Notary Public



                            Corporate Acknowledgement

         On this ______ day of ________________________, before me, the
subscriber, personally came ___________________________________, to me known,
who, being by me duly sworn, did depose and say that (s) he resides at
___________________________ and that (s)he is the __________________ of
______________________, the Corporation described in and which executed the
above instrument; and that (s)he executed said instrument by order of the Board
of Directors of said Corporation.


                                              -----------------------------
                                                      Notary Public



MDS Nordion
    Science Advancing Health



March 23, 1999


Mr. Pete Ellis
President and CEO
Food Technology Service, Inc. (FTSI)
502 Prairie Mine Road
Mulberry, Florida, 33860
U.S.A.

Dear Sir:

Further to our letter of December 12, 1997 a copy of which is attached, MDS
Nordion agrees to further extend payment of the debt owned by FTSI to January 4,
2000 based upon the terms set out in that letter, and subject to MDS Nordion's
right to convert the debt into equity of FTSI, at any time according to terms
set out in our letter agreement of March 13, 1998, and a copy of which is
attached.

Yours very truly,

Mike Thomas
Vice President
Finance and Chief Officer


by:



We acknowledge and concur with the foregoing
this 24 day of March 1999


by:
     Pete Ellis, President & CEO



MDS Nordion
    Science Advancing Health



January 19, 2000



Mr. Pete Ellis
President and CEO
Food Technology Service, Inc. (FTSI)
502 Prairie Mine Road
Mulberry, FL 33860
U.S.A.

Dear Sir:

Further to our letter of December 12, 1997 a copy of which is attached, MDS
Nordion agrees to further extend payment of the debt owned by FTSI to January 5,
2001 based upon the terms set out in that letter, and subject to MDS Nordion's
right to convert the debt into equity of FTSI, at any time according to terms
set out in our letter agreement of March 13, 1998, and a copy of which is
attached.

Yours very truly,


Mike Thomas
Vice President
Finance & Chief Financial Officer



We acknowledge and concur with the foregoing
this 24th day of March 1999


By:
     Pete Ellis, President & CEO



MDS Nordion
    Science Advancing Health



March 6, 2000



Food Technology Service, Inc.
502 Prairie Mine Road
Mulberry, Florida 33860 U.S.A.

Attention:   Pete Ellis, President and CEO

Dear Sirs:

Re:  Simplification of Security Interests

The parties desire to simplify and consolidate the security interests securing
Food Technology Service, Inc's ("FTSI") outstanding debt and other obligations.

Indebtedness

FTSI as at November 30, 1999, acknowledges its indebtedness to MDS Nordion Inc.
("Nordion") in the amount of $900,000US and accrued interest in the amount of
$22,374,50US (the "Debt"), pursuant to cash advances made by Nordion to FTSI
under the Agreement dated December 11, 1991, which sum is currently secured by a
Convertible Debenture (the "Debenture") and the Mortgage and Security Agreement,
respectively dated January 15, 1992. The Debt and any future payment or advance
of funds to FTSI or to its benefit by Nordion after November 30, 1999, continue
to bear annual interest, until full payment, at the rate of the Nations Bank
prime rate in effect from time to time plus one percent (1%). The Debt, interest
accruing thereon and any future advances or payments including payment of
guarantees or indemnities to third parties made by Nordion to FTSI's benefit
(collectively the "Indebtedness") remain, at Nordion's option, convertible at
any time into common shares of FTSI based on the conversion rate of 70% of the
closing price of FTSI's shares listed on NASDAQ on the last trade date prior to
exercise of the conversion right.

Simplification and Consolidation

In order to simplify and consolidate the security interest securing the
Indebtedness Nordion agrees (i) to release and discharge all underlying security
interests registered in the State of Florida, with respect to the purchase of
equipment and cobalt 60 which Nordion holds under the Uniform Commercial Code
and which were registered prior to the date of this letter agreement, excluding
the Debenture and notification of retention of ownership of 2.6m Curies of
cobalt-60 under the agreement dated September 11, 1992, (ii) to discharge the
Mortgage and Security Agreement dated October 22, 1991 which secures payment to
MDS Nordion by FTSI of up to $600,000 US under the terms of the Reimbursement
and Indemnity Agreement dated October 22, 1991 ("Indemnity Agreement"), and
(iii) to discharge the Mortgage and Security Agreement dated January 15, 1992,
in favor of securing the Indebtedness under a new mortgage and security
agreement.

Florida State Requirements

The parties further agree to amend the Indemnity Agreement in order to replace
"Bank of Montreal" in such agreement, with "Canadian Imperial Bank of Commerce
or such other bank as may be designated by Nordion from time to time."

Line of Credit

Additionally, FTSI agrees to indemnify and reimburse Nordion for any payment
Nordion may otherwise make to Fleet National Bank, pursuant to its obligations
under the Unlimited Guaranty and Indemnity Agreement dated October 29, 1998,
issued by Nordion to Fleet National Bank, for the purpose of guaranteeing
repayment of the line of credit granted to and in favor of FTSI, as amended and
as increased in amount from time to time including interest, costs and expenses.

General Indemnity

FTSI agrees to indemnify and reimburse Nordion for any payment made by Nordion
to third parties arising from guarantees or indemnities to third parties issued
by Nordion for the benefit of FTSI.

Implementation

In order to implement the foregoing the parties agree to register a new mortgage
and security agreement replacing the Mortgage and Security Agreement dated
January 15, 1992, which shall be substantially in the same form and which shall
provide as follows:

(1)  provide security for payment of the Debt and interest accruing thereon as
     set out in the Debenture.

(2)  eliminate the total overall mortgage cap (currently capped at
     $2,000,000US), and replace it with a total overall mortgage cap of
     $7,000,000US.

(3)  provide security to Nordion for any payment up to $600,000 US, to be paid
     by FTSI to Nordion pursuant to the Indemnity Agreement, wherein, FTS has
     agreed to indemnify Nordion against payment, up to $600,000 US, required to
     be made by Nordion to Acstar Insurance Company ("Acstar") pursuant to
     indemnities entered into by Nordion with Acstar to secure a License and
     Permit Bond between FTSI and Acstar for the benefit of the State of
     Florida, in the amount $600,000 US;

(4)  eliminate the limit on the amount of additional loans from Mortgagee to
     Mortgagor under the January 15, 1992 Mortgage and Security Agreement,
     (currently capped at $500,000 US in additional loans), to provide that the
     new mortgage and security agreement, to the greatest extent possible,
     secure (i) FTSI's present or future obligations to Nordion, including but
     not limited to additional loans interest, costs and expenses; (ii)
     reimbursement to Nordion for any amount expended by Nordion pursuant to any
     guarantee, letter of credit, indemnity or any other commitment of any type
     by Nordion to a third party for the benefit of FTSI including without
     limitation, any guarantee by Nordion of a present or future working capital
     loan or line of credit by a third party (including Fleet National Bank), to
     FTSI.

Costs and Expenses

FTSI further agrees that it shall pay all taxes and penalties including without
limitation, documentary stamp taxes and intangible taxes, now or hereafter
imposed by applicable governmental authority regarding all prior, existing or
future, financing guarantees, indemnities or security transactions between the
parties, and shall pay all legal costs and attorney's fees incurred in carrying
out the transactions contemplated herein.

Waiver

Nothing contained in this letter agreement invalidates any security now held by
Nordion for payment of the Indebtedness and FTSI hereby waives in favor of
Nordion and its successors and assigns any claims or defences which FTSI may
have regarding or in any way related to the Indebtedness from actions or events
prior to this date and further agrees not to raise any such claims or defences,
if any, against Nordion or its successors or assigns in civil proceedings or
otherwise.

If you concur with the foregoing, please sign in the space provided.

MDS NORDION INC.

By:


We concur this 6th day of
March, 2000

FOOD TECHNOLOGY SERVICE, INC.

By:



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