Study on in vitro Antioxidant Effects of Polysaccharides from Sweet Potato Leaf, Stalk and Stem

Abstract

Abstract: The in vitro antioxidant effects of flavonoids of sweet potato vines (FSPV) were studied. The scavenging capacities of FSPV on 1,1-diphenyl 2-picrylhydrazyl, superoxide and hydroxyl free radical were assayed. Meanwhile, the antioxidant activity on linoleic acid was studied with thio barbituric acid(TBA) method. These results showed, on DPPH free radical, the scavenging effect of FSPV is very good (IC50=8.60mg/L). The scavenging activity on superoxide free radical is stronger than lutin’s, but weakerthan VC’s, and the scavenging activity on hydroxyl free radical is better than lutin’s and VC’s. Moreover, FSPV shows strong antioxidant activities on linoleic acid. So, experiments in vitro indicated that FSPV blings about strong antioxidative effect.

Key words: , sweet potato leaf； stalk and stem； flavonoids； antioxidant effect； thio barbituric acid(TBA)；

GAO Yin-Yu, HONG Xue-E, LUO Li-Ping, XIA Dong-Hua, Chen-Cai-Shui. Study on in vitro Antioxidant Effects of Polysaccharides from Sweet Potato Leaf, Stalk and Stem[J]. FOOD SCIENCE, 2006, 27(7): 103-106.

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Study on in vitro Antioxidant Effects of Polysaccharides from Sweet Potato Leaf, Stalk and Stem

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