雪莲果叶酚酸抗氧化能力的研究

Study on antioxidant activity of phenolic acid in yacon leaves

通过测定雪莲果叶酚酸提取物的还原能力和对化学模拟体系中羟自由基(.OH)、超氧阴离子自由基(O2-.)及二苯代苦味肼基自由基(DPPH.)的清除能力,研究了雪莲果叶酚酸提取物的体外抗氧化活性。结果表明:雪莲果叶酚酸提取物具有较强的抗氧化能力,对自由基有明显清除作用,并且随着雪莲果叶酚酸浓度的增加,其抗氧化能力有显著增强的趋势。

The antioxidation activity of phenolic acid in yacon leaves was discussed by measuring their reducing ability and the ability of scavenging hydroxyl radicals（ · OH） ,superoxide anion radicals（ O2-· ）and t, t-diphenyl -2-picryl-hydrazyl radicals（DPPH·）.The result indicated that the phenolic acid in yacon leaves had preferable antioxidation activity and the ability of scavenging free radicals, between effect of the scavenge radical and concentration of samole showed certain dose-effect relationships.