淮山药多糖的研究

目的:从淮山药中提取粗多糖RDP,进行纯化分离,得到均一的多糖RP,并初步研究其组成和结构。方法:依次经水浸提、乙醇沉淀、十六烷基三甲基溴胺盐脱蛋白、微晶纤维素柱色谱、Sephadex G-100色谱分离纯化得白色粉末状多糖RP。Sephadex G-200柱层析进行纯度鉴定。纸层析分析多糖酸水解产物;凝胶色谱法测定其相对分子质量;用红外光谱分析鉴定RP。结果:纯度鉴定证明其为均一组分;红外光谱分析其具有β-糖苷键;PC分析其单糖组成为葡萄糖、D-甘露糖、D-半乳糖。结论:本实验对为该多糖的进一步开发利用提供一定的理论依据。

Research of Polysaccharide from Dioscorea opposita Thunb

OBJECTIVE: To isolate a homogeneous polysaccharide RP from RDP (a crude polysaccharide from Dioscorea opposita Thunb.) , and study its preliminary composition and structure. METHODS: RP was obtained with water extraction, alcohol sedimentation, CTAB deprotein, cellulose column and SephadexG-100 column. The purities of RP were identified by SephadexG-200. PC analysis on its acidic hydrolysates was used to determine the sugar components. Sephadex chromatography was used to mensurate its molecular weight. IR was used to analysis RP. RESULTS: RP was homogeneous. IR indicated that RP had beta configurations. The compositon was identified by paper chromatography as glucose, D-mannose, D-galactose. CONCLUSION: The research could provide a theoretical foundation for further development and utilization.