Separation and Properties of Polysaccharides from Asparagus (Officinalis L) Old Stalks

Abstract:

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.

• Periodical: Advanced Materials Research (Volumes 361-363)
• Pages: 789-793
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.361-363.789
• Online since: October 2011
• Authors: Jia Song, Yue Ma, Chao Zhang, Xiao Yan Zhao, Hai Feng Qian
• Keywords: Asparagus, Ethanol Precipitation, Property Analysis, Ultrafiltration (UF)

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