Antioxidant activity of green tea and its catechins in a fish meat model system
Antioxidant activity of green tea and its catechins in a fish meat model system
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DOI：
10.1021/jf9706134
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发表时间：
1997-11-01
影响因子：
6.1
通讯作者：
Shahidi, F
中科院分区：
文献类型：
--
作者：
He, YH;Shahidi, F
研究了磨碎的绿色茶（GGT）和商品茶提取物，即Polyphenon 25（P-25）、Polyphenon 30（P-30）、Polyphenon 60（P-60）和Nikken Polyphenon 60（NPP-60），以及实验室规模制备的绿色茶提取物（GTE）和纯茶儿茶素，即（-）表儿茶素（EC）、（-）-表没食子儿茶素（EGG）、评价了（-）-表儿茶素没食子酸酯（ECG）和（-）-表没食子儿茶素没食子酸酯（EGCG）在鱼肉模型系统中的作用。将所得结果与含有常用抗氧化剂如α-生育酚、丁基化羟基甲苯（BHT）、丁基化羟基茴香醚（BHA）和叔丁基对苯二酚（TBH&）的样品的结果进行比较。将鲭鱼的磨碎的白色肌肉（模型系统）在75 ℃下烹饪并在4 ℃下储存7天。通过测量2-硫代巴比妥酸反应性物质和样品的选定和/或总挥发物含量的变化来监测氧化的进展。与含有α-生育酚、BHT、BHA和TBHQ的样品相比，用GGT叶、茶提取物和纯儿茶素处理的样品显示出优异的氧化稳定性。儿茶素对鱼肉的抗氧化作用由大到小依次为EGCG接近ECG > EGC远大于EC。然而，EGCG比TBHQ更有效（p < 0.05），如所研究的系统中的总挥发物和丙醛含量所反映的。
The antioxidant activity of ground green tea (GGT) and commercial tea extracts, namely Polyphenon 25 (P-25), Polyphenon 30 (P-30), Polyphenon 60 (P-60), and Nikken Polyphenon 60 (NPP-60), as well as green tea extracts (GTE) prepared on laboratory scale and pure tea catechins, namely, (-)epicatechin (EC), (-)-epigallocatechin (EGG), (-)-epicatechin gallate (ECG), and (-)-epigallocatechin gallate (EGCG), in a fish meat model system was evaluated. Results so obtained were compared with those of samples containing commonly used antioxidants Such as alpha-tocopherol, butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), and tert-butylhydroquinone (TBH&). The ground white muscle of mackerel (model system) was cooked at 75 degrees C and stored at 4 degrees C for 7 days. Progression of oxidation was monitored by measuring changes in the 2-thiobarbituric acid-reactive substances and selected and/or total volatile contents of samples. The samples treated with GGT leaves, tea extracts, and pure catechins showed excellent oxidative stability as compared with samples that contained alpha-tocopherol, BHT, BHA, and TBHQ. The potency of catechins in the prevention of oxidation in fish meat was in the decreasing order EGCG approximate to ECG > EGC much greater than EC. However, EGCG was more effective (p < 0.05) than TBHQ, as reflected in total volatile and propanal contents in the system studied.