Study on Antioxidant of Polysaccharide from Nostoc

Study on Antioxidant of Polysaccharide from Nostoc commum Vauch Zhang Huixiang, Wang Xiuli, Yang Shijun, Feng Liangguan, Li Jianping College of Chemistry & Bioengineering, Guilin University of Technology, Guangxi Guilin, China Email address: 747140669@qq.com (Zhang Huixiang), wangxiuli1109@163.com (Wang Xiuli), 124058901@qq.com (Yang Shijun), 1327838820@qq.com (Feng Liangguan), 1106236852@qq.com (Li Jianping) To cite this article: Zhang Huixiang, Wang Xiuli, Yang Shijun, Feng Liangguan, Li Jianping. Study on Antioxidant of Polysaccharide from Nostoc commum Vauch. American Journal of Bioscience and Bioengineering. Vol. 3, No. 6, 2015, pp. 158-161. doi: 10.11648/j.bio.20150306.13 Abstract: Polysaccharide from Nostoc commum Vauch. was extracted by water extraction and ethanol precipitation. The content of polysaccharide was determined and its antioxidant activity was researched through reducing power, •OH radical scavenging, ABTS + • radical scavenging and anti-lipid peroxidation. The results showed that the content of polysaccharide from Nostoc commum Vauch. could reach to approximately 25.3%; the polysaccharide had a concentration-dependent antioxidant effect; the polysaccharide could significantly decreased •OH radical, its maximal scavenging rate was 98.8%; the polysaccharide also had some effect on ABTS + • free radical and lipid peroxidation, its maximal scavenging rate and peroxidation rate were respectively 58.3% and 37.2%.