Presence of ferrous iron (Fe 2+ ) and/or salt (NaCl) in ground beef followed by cooking and storage resulted in marked increases in lipid oxidation as measured by TBA values. Addition of an edible collagen film (Coffi R ) to minced fresh beef did not influence TBA values. Cooking fresh ground beef resulted in lowering of TBA values (when compared to raw beef), but TBA values increased more rapidly and to a greater extent in cooked beef than in raw samples during 7 days refrigerated storage.
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Farouk et al. (1991) studied this question.
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