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- W2365716124 abstract "AIM:To isolate and determine the structures of polysaccharides from Dioscorea opposite. METHOD: Having obtained crude polysaccharides with water extraction, alcohol and CTAB precipitation successively, gel column chromatography on Sephadex G-100 and HPLC analysis were subjected to purify the polysaccharides and determine their molecular weights. Methylation and TLC analysis on their acidic hydrolysates, together with IR and 13CNMR, were used to determine the sugar components, glycosyl linkages and configuration of anomeric carbons. RESULT:Two homogenous polysaccharides were isolated from the root of Dioscorea opposita. CONCLUSION: The molecular weights of S 1 and S 2 were 63?000 and 7?400 Dal respectively. They are all glucans with such type as [α-D-Glc(1→4)-] n" @default.
- W2365716124 created "2016-06-24" @default.
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- W2365716124 date "2003-01-01" @default.
- W2365716124 modified "2023-09-26" @default.
- W2365716124 title "Extraction, Isolation and Structural Determination of the Polysacchrides from Dioscorea opposita" @default.
- W2365716124 hasPublicationYear "2003" @default.
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