中国食品学报2012，Vol.12Issue(2)：15-23,9.
乳酸菌胞外多糖硒化修饰及其抗氧化活性研究
Study on Selenium Modification and Antioxidant Activity of Lactic Acid Bacteria Exopolysaccharides
摘要
Abstract
Objective to determine the optimum technical conditions for preparing selenium exopolysaccharides (EPS) produced by lactic acid bacteria. The range of reaction temperature, time and dose of selenium agent were defined through single-factor experiment and the optimal selenium modification conditions were ascertained by response surface methodology. The results showed that the selenium modification degree has been influenced by the temperature, time and dose of selenium agent obviously. When the temperature was 50 ℃, reaction time was 13.5 h and the dosage of selenium agent was 0.55 mg, the selenium content and conversion of EPS produced by lactic acid bacteria reached 168.744 μg/g and 32.01% respectively. The total antioxidant capacity and -OH scavenging capacity of Se-EPS were significantly enhanced, but ·O2- scavenging capacity had no obvious change.关键词
乳酸菌胞外多糖/硒修饰/抗氧化活性Key words
lactic acid bacteria exopolysaccharides/selenium modification/antioxidant activity引用本文复制引用
颜炳祥,潘道东,曾小群..乳酸菌胞外多糖硒化修饰及其抗氧化活性研究[J].中国食品学报,2012,12(2):15-23,9.基金项目
浙江省自然科学基金重点项目(Z3110211) （Z3110211）
宁波市创新基金项目(2010C92024) （2010C92024）
国家农业科技成果转化基金项目(2009GB2C220412) （2009GB2C220412）
