以金针菇为材料,采用微波辅助法提取多糖,并制备出乙酰化多糖衍生物,对其进行抗氧化性试验。多种体系的自由基清除实验结果显示:不同浓度的乙酰化金针菇多糖对·O2-、·OH、DPPH·都有一定的清除效果。与供试品Vc清除自由基能力相比,多糖对·O2-的清除率与Vc对·O2-的清除率相差不多;乙酰化金针菇多糖的还原力以及清除·OH和DPPH·的能力比Vc略弱。表明乙酰化金针菇多糖具较强的抗氧化活性。

In this paper,taking Flammulina velutipes as the material,the polysaccharide is extracted by microwave-assisted method,and acetylated polysaccharide derivatives are prepared,and then its oxidation resistance test is carried out. A variety of system of free radical scavenging experiment results show that the acetylated Flammulina velutipes polysaccharide with different concentrations have scavenging effects on ·O2-,·OH,DPPH·. Compared with the free radical scavenging capability of the sample of Vc,the clearance rate of polysaccharides on ·O2-is almost the same as that of Vc. The reducing power and the ability to clear ·OH and DPPH· of the acetylated Flammulina velutipes polysaccharides are slightly weaker than Vc. Experimental studies have shown that acetylated flammulina velutipes polysaccharides have strong antioxidant activity,and it can be considering to be used in food and drugs production together with other natural antioxidants.