Antioxidant properties of Glossogyne tenuifolia

ASIA unversity > 醫學暨健康學院 > 食品營養與保健生技學系 > 期刊論文 > Item 310904400/7822

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题名:	Antioxidant properties of Glossogyne tenuifolia
作者:	J.-H. Yang;S.-Y. Tsai;C.-M. Han;C.-C. Shih;J.-L. Mau
关键词:	Glossogyne tenuifolia;Antioxidant Activity;Reducing Capacity;Scavenging Ability;Chelating Ability;Antioxidant Components
日期:	2006
上传时间:	2010-02-26
出版者:	Asia University
摘要:	Glossogyne tenuifolia (Labill) Cass. (Compositae) is a special medicinal plant in the Pescadores Islands. Ethanolic, cold and hot water extracts were prepared from the dried herb and their antioxidant properties and components were studied. Ascorbic acid, alpha-tocopherol, butylated hydroxyanisole, citric and ethylenediaminetetraacetic acids were used in assays for comparison. With regard to EC(50) values in antioxidant activity, ethanolic and hot water extracts (0.08 and 0.09 mg/ml) were much more effective than the cold water extract (0.76 mg/ml). At 1.0 mg/ml, reducing capacities were 1.57, 0.31 and 1.04 for ethanolic, cold water and hot water extracts, respectively. Scavenging abilities on 1,1-diphenyl-2-picrylhydrazyl radicals were in descending order: ethanolic > cold water > hot water extracts. At 20 mg/ml, the hot water extract chelated all hydroxyl ions (100%) whereas the scavenging ability of the cold water extract was 68.86%. Chelating abilities on ferrous ions were in descending order: cold water > hot water > ethanolic extracts. Phenols were found to be the major antioxidant components. All EC(50) values were below 20 mg/ml, and some even below 0.1 mg/ml, indicating that all three extracts from G. tenuifolia were rich in antioxidant properties.
關聯:	The American Journal of Chinese Medicine, 34(4):707-720.
显示于类别:	[食品營養與保健生技學系] 期刊論文

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