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標題: Antioxidant properties of Glossogyne tenuifolia
作者: Yang, J.H.
Tsai, S.Y.
Han, C.M.
Shih, C.C.
Mau, J.L.
關鍵字: Glossogyne tenuifolia;antioxidant activity;reducing capacity;scavenging ability;chelating ability;antioxidant components;maillard reaction-products;alpha-tocopherol;plant-leaves;autoxidation;oil
Project: American Journal of Chinese Medicine
期刊/報告no:: American Journal of Chinese Medicine, Volume 34, Issue 4, Page(s) 707-720.
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 EC50 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 EC50 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.
ISSN: 0192-415X
DOI: 10.1142/s0192415x06004223
Appears in Collections:食品暨應用生物科技學系

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