淮山药多糖的研究

Research of Polysaccharide from Dioscorea opposita Thunb.

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。

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 β configurations. The eompositon was identified by paper chromatography as glucose, D-mannose, D-galactose. Conclusion： The research could provide a theoretical foundation for further development and utilization.