Study on microwave- assisted extraction and the antioxidant activities of polysaccharide from Russula vesca

The microwave extraction process of polysaccharide from russula vesca and antioxidant activity of PAP was also studied. The effect of solid- liquid,microwave times and microwave power on content of PAP were investigated.Orthogonal test was carried out on the basis of single- factor experiments to determine the optimum process parameters.Additional,the reducing power of PAP and the clearance effect of OH·,NO-2and O-2·were investigated. The optimize extraction process conditions as follows: extracting time 7min,the ratio of solid to liquid1∶40( g / m L),microwave power 500 W,and that crude polysaccharide yield was up to 7.82%.Furthermore,the PAP had better reducing power and had strong abilities to scavenge ·OH,NO-2and O-2·.Although the antioxidant activity of PAP from russula vesca was weaker than VC,but it could be used as a potential natural antioxidant in the food industry.