Bruas-Reignier F, Brun-Bellut J
Laboratoire des Sciences Animales-ENSAIA-INRA, 2 av. de la Forêt de Haye, 54500 Vandoeuvre lès Nancy, France.
Meat Sci. 1996 Jul;43(3-4):335-44. doi: 10.1016/s0309-1740(96)00019-8.
The chemical composition and post-mortem changes during 3-14 days of ageing were studied on three muscles (Longissiums dorsi, Triceps brachii caput longum, Rectus femoris) from 13 young Friesian bulls. Chemical composition varied widely between animals (p < 0.001) and muscles (p < 0.001), and did not change during post-mortem storage. Significant changes affecting the non-protein nitrogen and soluble protein nitrogen contents were similar in all three muscles but differed from animal to animal. The increase in non-protein nitrogen can be considered as an indicator of proteolysis. Proteolysis extended to 14 days post mortem. The myofibril fragmentation index increased significantly (p < 0.001) between 3 and 7 days post mortem along the same pattern, irrespective of the muscle and animal. A ceiling was reached at around 7 days post mortem, by which time maximum breakdown of the structure had probably occurred. No significant relationship was observed between chemical composition, changes in the soluble protein nitrogen, breakdown of structures and carcass characteristics.
对13头年轻弗里斯兰公牛的三块肌肉（背最长肌、肱三头肌长头、股直肌）在宰后3至14天的化学成分和死后变化进行了研究。化学成分在不同动物之间（p < 0.001）和不同肌肉之间（p < 0.001）差异很大，且在宰后储存期间没有变化。影响非蛋白氮和可溶性蛋白氮含量的显著变化在所有三块肌肉中相似，但因动物而异。非蛋白氮的增加可被视为蛋白水解的指标。蛋白水解持续到宰后14天。肌原纤维破碎指数在宰后3至7天之间以相同模式显著增加（p < 0.001），与肌肉和动物无关。在宰后约7天达到上限，此时结构可能已发生最大程度的分解。在化学成分、可溶性蛋白氮变化、结构分解和胴体特征之间未观察到显著关系。
