SUMMARY Examination of 12 commercial frozen bean packs showed two forms of color deterioration. The first resulted in conversion of chlorophyll to pheophytin, and the second caused destruction of both chlorophyll and pheophytin. It is shown that both forms of degradation may be related to the process of fat peroxidation. The conversion of chlorophyll to pheophytin may occur during the anaerobic initiation stage of fat peroxidation. Destruction may occur during the aerobic propagation stage.
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Graham C. Walker (1964) studied this question.
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