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Studies on Antioxidative Activities of Different Polarity Fractions of Rhodiola rosea L.Extract in Vitro


  [Objective] To investigate the antioxidant activities of different polarity fractions of Rhodiola rosea L.extracts in vitro.[Method] The extracts of Rhodiola rosea L.were divided into 3 different polarity fractions by ethyl acetate,normal butyl alcohol and water.The antioxidant activities of which were compared and assessed by reducing capacity,scavenging activities of superoxide anion radical(O2-·),hydroxyl radicals(·OH) and inferior nitric acid root(NO-2).[Result] Different polarity fractions of Rhodiola rosea L.extracts showed antioxidant activities,while the antioxidant activity of which varied in different reaction systems and the differences existed among different polarity fractions.Ethyl acetate fraction and normal butyl alcohol fraction had better reducing activity and scavenging activities on O2-· and ·OH than water fraction did.However,water fraction had better scavenging effects on NO-2 than ethyl acetate fraction and normal butyl alcohol fraction did.[Conclusion] Extracts from Rhodiola rosea L.had strong antioxidant activity,which could be a good source of natural antioxidants……   
[关键词]:Rhodiola rosea L.;Ethanol extract;Different polarity fractions;Antioxidant activity;China
[文献类型]:期刊
[文献出处]: 《Medicinal Plant2010年08期
[格式]:PDF原版; EPUB自适应版(需下载客户端)