【摘要】 以连翘乙醇提取物为试材,以叔丁基对羟基茴香醚(BHA)为对照品,采用分光光度法研究连翘乙醇提取物清除脂自由基(R·)、羟基自由基(OH·)、超氧阴离子自由基(O2-·)的效果,探讨连翘乙醇提取物的抗氧化能力随时间、上样质量浓度不同而变化的规律.结果表明:连翘乙醇提取物能够清除脂自由基,抑制油脂氧化,可以有效地清除羟基自由基和超氧阴离子自由基,其半清除率浓度(EC50)分别为1.2mg/mL和100μg/mL.相同条件下连翘乙醇提取物清除自由基抗氧化的能力均强于BHA,可以作为一种天然高效抗氧化剂加以开发.更多还原

【Abstract】 The scavenging ability of fructus forsythiae ethanol extracts on R·,OH· and O2-· was evaluated by means of photometric method,using BHA as control sample.And the relationship between inhibitory behavior to free radical and extracts concentration and time was also investigated and compared.Experimental results demonstrated that fructus forsythiae ethanol extracts could scavenge R· and inhibit oil oxidization significantly,and it could also scavenge OH· and O2-· efficiently,and the scavenging content 50%(EC50) of extracts was about 1.2 mg/mL and 100 μg/mL respectively.Under parallel experimental conditions the antioxidative ability of fructus forsythiae extracts is better than that of BHA,and fructus forsythiae extracts could be developed as a natural effective antioxidant.更多还原