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Cross‐linking of collagen in the presence of oxidizing lipid
Author(s) -
Sundholm F.,
Visapää A.,
Björksten J.
Publication year - 1978
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533472
Subject(s) - chemistry , gelatin , autoxidation , oxidizing agent , nitroxyl , ascorbic acid , condensation reaction , photochemistry , condensation , polymer chemistry , organic chemistry , catalysis , food science , physics , thermodynamics
Gelatin films containing unsaturated lipid have been exposed to ultraviolet and visible irradiation. No sign of paramagnetism could be detected in the films, although the gelatin was undergoing cross‐linking reactions. The addition of nitroxyl‐forming radical scavengers decreased the rate of cross‐linking, as did addition of ascorbic acid to the reacting mixture. Nitroxyls could not be detected in the gels, however. The conclusion is drawn that the main reaction in the cross‐linking reaction of collagen is a condensation of amino groups and extrinsic or intrinsic carbonyl groups. The extrinsic aldehydes are formed in the autoxidation of unsaturated lipid.