天然生姜复合物体外抗自由基活性研究

in vitro Antioxidant Activity of Natural Ginger Extract Complex

以生姜提取物为主要原料,通过二组分优化组合和体外抗自由基活性研究,研制一种对羟自由基和DPPH自由基有显著清除作用的二组分天然生姜复合抗氧化剂。结果表明:不同组成生姜复合物清除自由基的能力与其黄酮和酚类物质含量成正相关,且复合物一般强于单一组分,表现出组分间的协同效应;而清除自由基的能力最强的二组分天然生姜复合抗氧化剂的组成为生姜提取物+茶叶提取物,最佳质量配比为:生姜提取物:茶叶提取物为1.35:1(m/m),该天然生姜复合抗氧化剂清除自由基的能力明显强于合成的抗氧化剂BHT和PG。

The formulation of natural ginger complex was optimized by varying the distributions of ginger extract and tea extract in the complex.The radical scavenging capacities of natural ginger extract complexes was studied.Results showed that the radical scavenging activities of the natural ginner complexes with different chemical composition was positively correlated with the contents of flavonoids and other polyphenol and the complexes displayed high antioxidant activities than the ginger extract or tea extract alone,which indicated synergistic effect between these two extracts.The optimized formula for highest antioxidant activity was ginger extract：tea extract = 1.35：1 and this formula of ginger complex demonstrated even higher radical scavenging activity than artificial preservatives like BHT and PG.