摘要
探讨超高压处理(不同压力和保压时间)对牛半腱肌肌束膜和肌内膜胶原蛋白热力学特性影响。牛半腱肌肉经200～600MPa压力分别处理10min和20min,用差示扫描量热法研究肌束膜和肌内膜胶原蛋白热力特性(起始、最高和最终热收缩温度)在超高压处理过程中的变化。结果表明:超高压处理对牛半腱肌肌内膜胶原蛋白热收缩温度的影响较肌束膜胶原蛋白显著,特别对于较高压力(500MPa及其以上)和较长保压时间(20min)的处理。当压力超过500MPa时,保压时间越长,肌内膜胶原蛋白热收缩温度的增加越大(主要表现为最高热收缩温度)。500～600MPa的压力处理是影响肌束膜和肌内膜胶原蛋白热收缩温度的关键处理压力。高压诱导的结缔组织胶原蛋白热力特性(热稳定性)的变化是高压处理过程中牛肉肌束膜和肌内膜胶原蛋白热收缩温度产生差异的主要原因。
The main objective of this study was to investigate the effect of high pressure processing（HPP）（with varying pressures and treatment time） on thermal characteristics of perimysium and endomysium collagen from beef.Muscle samples were subjected to high pressure treatment varying from 200 to 600 MPa for 10 min and 20 min,respectively.The changes of thermal shrinkage temperatures（T o ： onset temperature;T p ： peak temperature;T e ： end temperature） of perimysium and endomysium collagen of beef semitendinosus muscle following HPP treatment were analyzed by differential scanning calorimeter（DSC）.The results indicated that the effect of high pressure on thermal shrinkage temperatures of endomysium collagen were more significant than that on perimysium collagen,especially when pressure was higher than 500 MPa and held for longer than 20 min.At pressure above 500 MPa,longer treatment time could lead to higher shrinkage temperatures of endomysium collagen（mainly presented in T p）.Pressures between 500 MPa and 600 MPa had a critical effect on the thermal shrinkage temperatures of perimysium and endomysium collagen treated for 10 min and 20 min,respectively.The changes in thermal shrinkage temperatures of perimysial and endomysial collagen of pressure processed beef muscle were attributed to the pressure-induced changes of thermal characteristics（thermal stability） of connective tissue collagen.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2013年第13期14-18,共5页
Food Science
基金
国家自然科学基金项目(31101313)
重庆市教委科学技术研究项目(KJ110714
KJ121504)
重庆市基础与前沿研究计划项目(cstc2013jcyjA80017)
重庆高校创新团队建设计划项目(KJTD201020)
关键词
牛半腱肌肉
肌束膜和肌内膜胶原蛋白
热收缩温度
超高压处理
差示扫描量热
beef semitendinosus muscle
perimysium and endomysium collagen
thermal shrinkage temperatures
high pressure processing（HPP）
differential scanning calorimetry（DSC）
