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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/17310


    Title: Studies on the antioxidative activitives of Graptopetalum paraguayense E. Walther
    Authors: Yun-Chin Chung;Shu-Ju Chen;Cheng-Kuang Hsu;Chen-Tien Chang;Su-Tze Chou
    Contributors: 保健營養生技學系
    Keywords: Graptopetalum paraguayense;Antioxidative activities;In vitro
    Date: -
    Issue Date: 2012-11-26 10:31:21 (UTC+8)
    Abstract: This study was aimed to evaluate the antioxidative activities of water (GWE), 50% ethanolic (GE50), and 95% ethanolic (GE95) extracts of Graptopetalum paraguayense. The antioxidant activities, including the radical-scavenging effect, reducing power, and antioxidative effect on Fe/ascorbate-induced lipid peroxidation in a liposome model system, were studied in vitro. The results showed that GWE, GE50 and GE95 possessed antioxidant characteristics including radical scavenging, reducing power, and lipid peroxidation inhibition. It was found that the antioxidative activities of all the extracts increased with increasing concentrations, and the activities correlated with both the total phenol and anthocyanin contents. A comparison of the 50% inhibition concentration (IC50) values of different antioxidative reactions revealed that GE50 was more effective in scavenging α,α-diphenyl-β-picrylhydrazyl (DPPH) radical and showed a higher reducing power than GWE and GE95. However, there were no significant differences (P > 0.05) in the lipid peroxidation-prevention effects among the extracts.
    Relation: FOOD CHEMISTRY, 91(3):419-424.
    Appears in Collections:[食品營養與保健生技學系] 期刊論文

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