紫叶稠李果实及叶片的色素抗氧化活性研究  

Study on the antioxidant activity of the Prunus virginiana's pigment extracted from leaf and fruit

作　　者：刘荣[1] 辛越[1] 

机构地区：[1]东北林业大学林学院食品科学系,黑龙江哈尔滨150040

出　　处：《食品工业科技》2012年第14期161-163,178,共4页Science and Technology of Food Industry

基　　金：中央高校基本科研业务费专项资金资助(DL12CA11)

摘　　要：利用溶剂法提取紫叶稠李果实及叶片的色素,研究了其色素对DPPH自由基、ABTS+自由基、羟基自由基的清除能力和总还原能力以评价色素的抗氧化活性,并以VC作对照。结果表明,当样品质量浓度小于0.15mg/mL时,紫叶稠李叶片色素对DPPH自由基清除能力大于果实色素的清除能力,而当样品质量浓度大于0.15mg/mL时,紫叶稠李叶片色素对DPPH自由基清除能力小于果实色素的清除能力。紫叶稠李叶片色素对ABTS+自由基、羟自由基的清除能力均大于果实色素的清除能力,紫叶稠李果实及叶片的抗氧化活性均随样品浓度升高而增强。并且,叶片色素表现出更强的还原力,在样品质量浓度为0.2mg/mL时,其还原力是VC的3倍、果实的6倍。The pigment of Prunus virginiana was extracted from the fruit and leaf by solvent method. The antioxidant activity of pigment was evaluated by the abilities to scavenge DPPH free radicaI,ABTS＋ free radical,Hydroxyl free radical and the total reduction capacity,and compared with that of Vc. The result ：showed that,when the mass concentration was less than 0.15mg/mL,the pigment of Prunus virginiana leaf showed a stronger capacity to scavenge DPPH free radical than the pigment of fruit,and when the mass concentration was greater than 0.15mg/mL,the pigment of Prunus virginiana leaf showed a weaker capacity to scavenge DPPH free radical than the pigment of fruit. In any concentration,the pigment of Prunus virginiana leaf showed a stronger capacity to scavenge ABTS ＋ free radical and Hydroxyl free radical than the pigment of fruit. The antioxidant activity of the pigment of leaf and fruit increased as well as the concentration. The pigment of Prunus virginiana leaf showed a stronger reducing capacity than the pigment of fruit,at tlqe mass concentration of 0.2mg/mL,the reducing capacity of the pigment of Prunus virginiana leaf was 3 times of Vc and 6 times of the pigment of fruit.

关 键 词：紫叶稠李 色素 抗氧化 

分 类 号：TS255.1[轻工技术与工程—农产品加工及贮藏工程]