不同温度下内源性V_E对牛脂肪储藏期间氧化状态的影响

刘玲; 李永鹏; 余群力; 韩玲; 郭文瑞; 邓丽娟; 韩广星; 于春起

doi:10.13386/j.issn1002-0306.2013.21.086

不同温度下内源性V_E对牛脂肪储藏期间氧化状态的影响

Effect of endogenous VE on oxidation state during fat storage under different temperature

摘要

摘要: 为了研究不同温度下内源性V E对牛脂肪储藏期间氧化状态的影响,本实验选取8头西门塔尔牛进行屠宰,取肾周脂肪,在-18、0、20℃条件下储藏,测定其内源性V E含量、过氧化值（POV）和硫代巴比妥酸反应底物值（TBARS）。结果发现,牛脂肪在经过120h的有氧储藏后,其20℃下的POV和TBARS值的增加量最高,是0℃储藏时增加量的1.20倍和1.65倍,是-18℃的1.84倍和1.94倍;与氧化状态变化相应的是,内源性V E在20℃下的残留率仅为21%,分别比0℃和-18℃储藏下低62.5%和70.4%。而经相关性分析也发现,内源性V E含量与POV及TBARS均具有极显著的负相关性,相关系数分别在-0.920^-0.997和-0.946^-0.983之间。结果表明,低温可以延缓牛脂肪在储藏期间的POV和TBArs上升过程,这与其内源性V E的显著负相关性有密切关系。

Abstract: In order to investigate the effect of endogenous V E on oxidation state during fat storage under different temperature, the postmortem endogenous V E, POV and TBARS of bovine adipose stored under-18, 0, 20℃ for120h from eight simmental cattle were determined.The maximal increase of POV and TBARS was found under 20℃after storage for 120h which was 1.20 times and 1.65 times of 0℃ respectively, and was 1.84 times and 1.94 times of-18℃ respectively. With corresponding oxidation state, the maximal decline of endogenous V E was also found under 20℃ with residual rate of 21% at 120h, which was 62.5% and 70.4% lower than 0°C and-18°C respectively.There was a significant negative correlation between V E and POV with correlation coefficients ranged from-0.920 to-0.997, and between V E and TBARS with correlation coefficients ranged from-0.946 to-0.983.It was showed that the low temperature condition could decelerate the increase of POV and TBARS of bovine adipose during storage which was closely related to significant negative correlation.