牛不同部位肌肉高铁肌红蛋白还原酶活力及耗氧率对肉色稳定性的影响
详细信息Effect of postmortem time on metmyoglobin reducing activity and oxygen consumption of different bovine muscles
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摘要: 为了研究牛不同部位肌肉的高铁肌红蛋白还原酶活力(MRA)和肉的呼吸耗氧强弱对肉色泽稳定性的影响,本文以牛的三个部位的肌肉:背最长肌(LL)、半腱肌(ST)、腰大肌(PM)为研究对象,4℃避光贮藏5d,测定MRA、肌红蛋白(MMb)含量、耗氧率(OCR)等,探究肉色稳定性与牛肉部位、MRA和呼吸耗氧率之间的关系。结果表明,三种肌肉中,背最长肌的色泽稳定性最好,腰大肌最差,半腱肌介于中间;MRA越高的肌肉,肉色越稳定;OCR越低的肌肉,肉色越稳定。
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关键词:
- 高铁肌红蛋白还原酶活力 (MRA) ; /
- 耗氧率 (OCR) ; /
- 肉色稳定性;
Abstract: In order to explore the relationships among MRA, OCR and color stability of different bovine muscles, MRA, MMb and OCR were determined in longissimus lumborum (LL) , semitendinosus (ST) and psoas major (PM) displayed for 5 days at 4℃ in the dark.The result indicated that color stability of LL was best, PM worst and ST in the middle. Moreover, muscles of higher levels of MRA or lower OCR had higher color stability. -
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