Study on Antioxidant Activities of Water Extracts from Lotus Germ in vitro

Abstract

Abstract: The scavenging effect of water extracts from lotus germ on oxygen radicals and its inhibitory effect on lipid peroxidation(LPO) were studied. The results showed that the extracts can both scavenge hydroxyl free radical(·OH) produced by Fenton reaction and superoxide anion free radical(O2·) produced by oxidation of pyrogallol,and the inhibitory concentrations of 50%(IC50) are 0.218 g/ml and 0.245 g/ml respectively. They also have inhibitory effects on the spontaneous lipid peroxidation in liver and kidney homogenate,and the IC50 values are 3.038 mg/ml and 3.577 mg/ml respectively. The content of ascorbic acid in the extracts determined by ultraviolet spectrophotometry is 1.132 mg/g,and the activity of SOD determined by NBT photoredction assay is 2062.7 U/g.

Key words: water extracts from lotus germ, antioxidant activity, oxygen radicals, lipid peroxidation -

ZHANG Min, ZHENG Tie-Song, TAO Jin-Hong, CHEN Jing. Study on Antioxidant Activities of Water Extracts from Lotus Germ in vitro[J]. FOOD SCIENCE, 2008, 29(8): 83-86.

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Study on Antioxidant Activities of Water Extracts from Lotus Germ in vitro

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