啤酒花多酚提取物的抗氧化活性研究

Study on the Antioxidant Activity of Polyphenol Extracts from Hops

以乙醇提取3种啤酒花的多酚提取物为试材,采用分光光度法研究了啤酒花多酚提取物清除DPPH、羟基自由基以及抑制脂质过氧化反应的能力。研究啤酒花多酚提取物的抗氧化能力随时间、样品质量浓度不同而变化的规律。结果表明,啤酒花多酚提取物能够清除各种自由基、抑制油脂过氧化反应,其清除能力与样品中啤酒花多酚的含量有着直接关系,啤酒花萃余物可作为一种天然抗氧化剂加以开发和利用。

The scavenging capability of three kinds of polyphenols extracts（extracted from hops by ethanol） on DPPH.and.OH and their inhibition of lipid peroxidation were evaluated by spectrophotometry.And the change rules of the antioxidant acitivity of polyphenol extracts in sample hops of different polyphenol content and at different time were investigated.The experimental results demonstrated that polyphenol extracts from hops could scavenge different free radicals and inhibit lipid peroxidation and its scavenging capability was directly related to polyphenol content in sample hops.Supercritical CO2 extraction residues of hops could be developed as a natural effective antioxidant.