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KMID : 0665220080210020157
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Korean Journal of Food and Nutrition
2008 Volume.21 No. 2 p.157 ~ p.164
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Studies on the Antioxidative Ability of Methanol and Water Extracts from Orostachys japonicus A. Berger According to Harvest Times
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Choi Sun-Young
Chung Mi-Ja
Sung Nak-Ju
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Abstract
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This study examined the antioxidant activity of methanol and water extracts from Orostachys japonicus A. Berger according to harvest times, by measuring electron donating ability(EDA), reducing power, superoxide dismutase(SOD)-like activity, thiobarbituric acid reactive substances(TBARS) and antioxidant activity within a linoleic acid emulsion. EDA increased proportionally with the extract concentration and the methanol extract had slightly stronger effects than the water extract. And reducing power and SOD-like activity were highest in the methanol extract. Overall, based on the data, the methanol extract of O. japonicus A. Berger harvested during August ~ October presented the highest level of antioxidative activity and may be a good candidate as a natural antioxidant source.
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KEYWORD
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Orostachys japonicus, electron donating ability, reducing power, SOD-like activity
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