摘要
利用超声辅助,分别以水、乙醇为提取剂,在最优工艺条件下提取核桃壳色素。以维生素C为对照,分别采取4种方法(总还原力、羟基自由基、DPPH自由基、超氧阴离子自由基)对不同方法提取的核桃壳色素进行抗氧化活性的研究.结果表明:水提色素和醇提色素均有一定的抗氧化活性,在总还原力、羟基自由基、DPPH自由基清除力上,醇提色素的抗氧化活性高于水提色素;两种色素对超氧阴离子自由基均没有清除能力.
Walnut shell pigments were extracted by water and ethanol with ultrasound-assistance under optimal conditions,respectively.Four methods（namely,total reducing power,hydroxyl free radical,DPPH free radical,superoxide anion radical）were used to investigate on the antioxidant activity of walnut shell pigments extracted by different methods and by taking VCas control.The results show that water extraction and ethanol extraction pigments have some antioxidant activity.Ethanol extracts have higher antioxidant activity than water extracts based on the total power,the hydroxyl radical scavenging,and DPPH radical scavenging;These pigments have no ability to scavenge superoxide anion radical.
出处
《陕西科技大学学报（自然科学版）》
2016年第1期114-117,共4页
Journal of Shaanxi University of Science & Technology
基金
陕西省科技厅农业科技攻关计划项目(2014K01-10-04)
关键词
核桃壳
色素
抗氧化
自由基
walnut shell
pigments
antioxidant
radical
