安徽农业科学2012，Vol.40Issue(25)：12700-12702,3.
两代农民工消费水平与消费结构的比较研究
A Comparative Study of Consumption Level and Consumption Structure between Two Generations of Migrant Workers
摘要
Abstract
[Objective]This study aimed to optimize the extraction process of polysaccharides from the leftover of Cordyceps militaris culture medium.[Method]Firstly, the compositions of C. militaris culture medium were detected, before the cordycepin polysaccharide in medium was extracted using enzymatic hydrolysis. The optimum hydrolytic enzyme was selected using single factor test. Then, the extraction tempera ture , pH, enzyme content and solid-liquid ratio were optimized by response surface methodology, and confirmed by mathematical simulation.[Result]Acid hydrolytic enzyme was the optimum for extracting polysaccharides from the leftover of C. militaris culture medium. The optimum extraction conditions were as follows: extraction temperature of 39. 89 t , solid-liquid ratio of 1 =75.78, enzyme content of 2. 39% , hydrolysis time of 4 h and pH 3.12. Under this condition, the extraction rate of polysaccharides was 9.96%.[Conclusion]The study could provide a certain theoretical direction for extracting polysaccharides from the leftover of C. mliltaris culture medium on a large scale.关键词
农民工/消费水平/消费结构Key words
Migrant workers j Consumption level/Consumption structure分类
农业科技引用本文复制引用
邢海燕,于伟,陈三妹..两代农民工消费水平与消费结构的比较研究[J].安徽农业科学,2012,40(25):12700-12702,3.基金项目
国家统计局全国统计科研2010年度计划项目(2010LC58) （2010LC58）
教育部人文社会科学研究青年基金项目(10YJCZH186). （10YJCZH186）
