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Study on composition of two polysaccharides Gbp and Gcp from root of Gerbera piloselloides

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Author:
No author available
Journal Title:
CHINESE TRADITIONAL AND HERBAL DRUGS
Issue:
6
DOI:
10.3321/j.issn:0253-2670.2004.06.005
Key Word:
毛大丁草;多糖;三甲基硅醚化反应

Abstract: 目的从毛大丁草的根中分离提取多糖,测定其组成.方法毛大丁草根的水提物经脱蛋白、脱色、乙醇沉淀得两种粗多糖,再经过Sephadex G-75和Sephadex G-50凝胶柱色谱纯化得到两种纯多糖Gbp和Gcp,用高效凝胶色谱(HPGPC)测定Gbp和Gcp相对分子质量,通过完全酸水解后,进行三甲基硅醚化的GC-MS分析,测定两种多糖的组成.结果 Gbp和Gcp重均相对分子质量分别为6.65×105和7.45×104.Gbp是由木糖、来苏糖、鼠李糖、核糖、葡萄糖和半乳糖组成,其比例约为3:3:3:2:6:2 Gcp主要由果糖组成,还有少量葡萄糖和木糖,其比例为24:4:1.结论通过凝胶柱色谱分析,所提取两种多糖Gbp和Gcp均为单一、纯净的多糖.

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