红毛七乙醇提取物和不同极性部位抗氧化活性的研究

Study on antioxidant activities of ethanol extract and different polar fractions of Caulophyllum robustum Maxmi.

主要从清除DPPH自由基(DPPH.)、超氧阴离子自由基(O2-.)、羟基自由基(.OH)和亚硝酸盐(NO2-)四个方面,研究红毛七乙醇提取物和不同极性萃取部位的体外抗氧化活性。结果表明,红毛七乙醇提取物和不同极性部位对DPPH.、O2-.、.OH、NO2-均具有清除能力,其中乙醇提取物、正丁醇与乙酸乙酯中等极性部位抗氧化活性较强,而极性较小的石油醚部位和极性较大的水部位抗氧化作用较弱。

The antioxidant activities of ethanol extract and different polar fractions of Caulophyllum robustum Maxmi. were evaluated by DPPH radical scavenging activity （ DPPH · ）, superoxide radical scavenging activity （ O2^- ）, hydroxyl radical scavenging activity（ ·OH）and NO2 scavenging assays.The results showed that ethanol extract and different polar fractions displayed high antioxidant activities.In totally,the antioxidant activities of middle polar fractions were stronger than those of lower and higher polar fractions.