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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/13204

Title: Antioxidant Activity of Extracts from Du-zhong (Eucommia ulmoides) toward Various Lipid Peroxidation Models in Vitro
Authors: Yen, Gow-Chin;Hsieh, Chiu-Lan
Contributors: 生物技術研究所
Keywords: Du-zhong tea;Water extracts;Antioxidant activity;Lipid peroxidation;Free radical
Date: 1998-10
Issue Date: 2012-08-07T06:56:29Z
Publisher: American Chemical Society
Abstract: The antioxidant effect of extracts from leaves, raw cortex, and roasted cortex of Du-zhong was evaluated using various lipid peroxidation models. The inhibitory activity of extracts of Du-zhong (200 μg/mL) on the peroxidation of linoleic acid measured by thiocyanate method followed the order leaves (99.9%) > roasted cortex (95.9%) > raw cortex (77.2%) at 60 h of incubation. The IC20 for leaves, roasted cortex, and raw cortex on the peroxidation of liposome, induced by Fe3+/H2O2/ascorbic acid, was <0.06, 0.24, and 0.81 mg/mL, respectively. The thiobarbituric acid reactive substances values for leaves, roasted cortex, and raw cortex were 0.12, 1.54, and 1.81 μmol of malondialdehyde/mg of protein in enzyme-mediated microsomal peroxidation and 0.08, 0.69, and 0.88 μmol of malondialdehyde/mg of protein in the nonenzyme-mediated microsomal peroxidation, respectively. The antioxidant activity of extracts of Du-zhong correlates to their polyphenol content. The results presented herein indicate that extracts of Du-zhong leaves may be useful in inhibiting membrane lipid peroxidation and preventing free radical-linked disease.
Relation: Journal of Agricultural and Food Chemistry, 46(10): 3952-3957
Appears in Collections:[生物技術研究所] 期刊論文

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