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Effects of early post-mortem ageing on intramuscular collagen stability, yield and composition
E W Mills1, S H Smith, J C Forrest
1Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Abstract:
Post-mortem changes in the composition and physical stability of bovine intramuscular collagen were evaluated during a 24 h ageing period. The yield of intramuscular connective tissue (IMCT) isolated from the infraspinatus muscle samples and the carbohydrate content of that material did not change significantly (P > 0·05) during the ageing period. The collagen content and total protein content of the isolated IMCT increased (P < 0·05) through 8 h post-mortem. Moisture content of the isolated material decreased numerically but not significantly (P > 0·05). Collagen thermal shrinkage temperature (T(s)) decreased (P < 0·01) and collagen solubility increased (P < 0·05) during the ageing period with most of the changes occurring in the first 8 h.
