专业技能英语实训报告.docx

专业技能英语实训报告 专业:食品科学与工程 班级：131 姓名：成玲 学号：2013035102Study on antioxidant activity of polysaccharidefrom Chinese Rice Wine in vitroAbstract：The antioxidant activity of the polysaccharide from Chinese Rice Wine by alcohol precipitation was contrasted in the present study. The total antioxidant activity，DPPH radical，hydroxyl radical and superoxide anion free radical were selected as the antioxidant indicators in vitro and ascorbic acid（VC）as the positive control. The results showed that crude polysaccharide and refined polysaccharide from Chinese Rice Wine had antioxidant activity，and the antioxidant activity was related to concentration. The antioxidant ability of refined polysaccharide in total antioxidant activity，removing the DPPH radical and hydroxyl radical was better than that of crude polysaccharide. However，the antioxidant ability of crude polysaccharide in removing superoxide anionfree radical was stronger than that of refined polysaccharide.Key words：Chinese Rice Wine；polysaccharide；alcohol precipitation；antioxidant ；Chinese rice wine is the oldest traditional brewing wine, andit is one of the worlds three largest ancient wine full bodied, Yellow Wine the mellow, soft wine. Chinese rice wine with its wonderful color and its name, with its unique taste, rich nutrition and its health care function and known to the world. Research shows that Chinese Wine has antioxidant activity and antioxidant activity of substances containing the antioxidant activity and the Yellow Wine, such as polyphenols and peptide etc. A large number of studies have indicated that polysaccharide has antioxidant activity. The yellow rice wine contains polysaccharides, whether or not it has antioxidant activity, the research on this aspect has not been reported in any report. Therefore, Shaoxing yellow rice wine was used as raw material, and the polysaccharide was extracted from the raw materials, and the DPPH free radical, hydroxyl free radical and superoxi