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Oxidation Products

Oxidation Products

FIG. 21. Photo-oxidative reactions of aromatic polyurethanes. (A) Formation of quinone-imide from aromatic polyurethane. (From A. J. Coury et at., }. Biomater. Appl. 3, 1988.) (B) Photolytic cleavage of urethane link. (From S. K. Brauman et a!., Ann. Biomed. Eng. 9, 1981.)

Acknowledgments

The author is very grateful to Dr. R. C. Allen for providing the drawing on activated phagocyte redox metabolism. For their technical advice and contributions, I sincerely thank Drs. James Anderson, John Eaton, John Mahoney, Maurice Kreevoy, Grace Picciolo and Buddy Ratner. For the preparation of this manuscript, I am deeply indebted to my "computer wizard," Mrs. Jayne McCaughey.

M^""1' + HO- + H+ —» H+<n'1> + -P. + H+

^"'"H + — P+-M1"'"*1' + OH" + HO-M1"'""1' + HO,- + H+

FIG. 20. Initiation of oxidation pathways by metal ion.

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