【摘要】 利用.OH和金属离子促进猪肉匀浆液的脂质过氧化,检测不同浓度的肌肽对其过氧化的抑制作用.结果表明,在.OH促进的脂质过氧化体系中,1 mmol/L肌肽显著抑制了猪肉匀浆中TBARS的形成量(P<0.05),氧化抑制率为13.47%,20 mmol/L时肌肽的作用效果极显著(P<0.01),氧化抑制率为47.90%.在Fe2+、Fe3+、Cu2+促进的脂质过氧化体系中,不同浓度的肌肽均显示出抗氧化效果,且随着肌肽浓度的增加而增强,其中肌肽在Cu2+体系中的抗氧化效果最明显,1 mmol/L时抑制率为41.36%.更多还原

【Abstract】 Pork homogenates was used as a series of lipid oxidization systems caused by ·OH or metal ions to check antioxidation effects of carnosine.The results showed that carnosine scavenged ·OH and chelateded metal ions such as Fe²⁺ 、Fe³⁺、Cu²⁺,and showed a concentration-dependent manner.In the ·OH induced oxidization system,1 mmol/L carnosine significantly inhibited TBARS in pork homogenate（P<0.05）,and the inhibition rate（IR）（%） was 13.47%,20 mmol/L carnosine got a more significant effect（P<0.01）,and the inhibition rate（IR）（%） was 47.90%;In the metal ions catalyzed oxidization system,inhibitory effect of carnosine on different metal ions was different: canosine had the most significant antioxidation ability in the Cu²⁺-catalyzed system,when the concentration of carnosine was 1mmol/L,the inhibition rate（IR）（%） was 41.36%.更多还原