【摘要】 分别用芬顿(Fenton)反应法和1,1-二苯-2-苦肼基(DPPH)法测定了洋葱色素的抗氧化作用。结果表明,洋葱色素对羟自由基和DPPH自由基均有一定的清除作用,其清除率大小依次为42.4%,58.2%。洋葱色素是十分具有开发利用价值的天然色素。更多还原

【Abstract】 An optimized procedure for the extraction of onion pigment from onion was described.Antioxidation activity of the extracted onion pigment was studied by the Fenton reaction and the method of DPPH(1-diphenyl-2-picrylhydrazino) free radical(·DPPH).As indicated by the experimental results,onion pigment shown scavenging action on both the hydroxyl free radical(·OH) and 1-diphenyl-2-picrylhydrazino free radical((·DPPH)) and gave their rates of scavenge of 42.4% and 58.2% respectively.The results of this work provided a sound scientific basis supporting the exploitation of the natural onion pigment for its application in both the food industry and preparation of nutriments.更多还原