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<PAGE> [Logo of Arthur Andersen] EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this registration statement of our reports dated January 18, 2000 included in Syntroleum Corporation's Form 10-K for the year ended December 31, 1999 and to all references to our Firm included in this registration statement. /s/ Arthur Andersen LLP Tulsa, Oklahoma January 12, 2001
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