文献类型： 外文期刊
作者： Song, Jia 1 ; Ma, Yue 2 ; Zhang, Chao 2 ; Zhao, Xiaoyan 2 ; Qian, Haifeng 1 ;
作者机构： 1.Jiangnan Univ, Sch Food Sci & Technol, State Key Lab Food Sci & Technol, Wuxi 214122, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Vegetable Res Ctr, Beijing 100097, Peoples R China
关键词： asparagus;ethanol precipitation;ultrafiltration;properties
期刊名称：NATURAL RESOURCES AND SUSTAINABLE DEVELOPMENT, PTS 1-3
ISSN： 1022-6680
年卷期： 2012 年 361-363 卷
页码：
收录情况： SCI
摘要： The polysaccharides of the asparagus old stalks was seperated by ethanol precipitation and ultrafiltration. The molecular weigh distribution and antioxidative capacity of the extracts of the alcohol precipitation(C-1), ultrafiltration retention(C-2), and ultrafiltration penetrates (C-3) were further evaluated. The polysaccharides yields of the C-1, C-2, and C-3 were 1.53, 1.21, and 0.71%, respectively. The weigh average molecular weight of C-1, C-2, and C-3 were 163900, 135880, and 61063 Da, respectively. C-2 showed the strongest antioxidant capacity in all extracts by the scavenging effect on DPPH, superoxide and hydroxyl radicals. Therefore, the ultrafiltration was an alternative to separate the polysaccharides from the asparagus old stalks and kept their antioxidatant capacity.
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