A series of oligomannuronates with series degree of polymerization（DP28） were prepared by acid hydrolysis from alginate-derived homopolymannuronate blocks, and the structures of the oligosaccharides were analyzed. T...A series of oligomannuronates with series degree of polymerization（DP28） were prepared by acid hydrolysis from alginate-derived homopolymannuronate blocks, and the structures of the oligosaccharides were analyzed. The macromolecule of alginate was treated by partial acid hydrolysis and fractionated at pH2.85 resulting in homopolymannuronate blocks. The homopolymer was degraded by acid hydrolysis, and the oligosaccharides were separated and purified by gel chromatography. The oligosaccharides were characterized by fluorophore-assisted carbohydrate electrophoresis（FACE）, and the structures of derived oligomannuronates were determined by ESI-MS, NMR as well as FTIR analysis.展开更多
以裙带菜(Undaria pinnatifida,wakame)为原料,经水提醇沉、DEAE-Sepharose Fast Flow、SephacrylS-300和Sephacryl S-200凝胶柱分离纯化,得到2个酸性多糖UPPS03和UPPS04.高效凝胶渗透色谱测试结果表明,其为均一多糖,平均分子量分别为3....以裙带菜(Undaria pinnatifida,wakame)为原料,经水提醇沉、DEAE-Sepharose Fast Flow、SephacrylS-300和Sephacryl S-200凝胶柱分离纯化,得到2个酸性多糖UPPS03和UPPS04.高效凝胶渗透色谱测试结果表明,其为均一多糖,平均分子量分别为3.6×104和1.1×104.采用糖组成分析、高碘酸氧化及Smith降解、糖醛酸还原、甲基化、红外光谱和核磁共振等方法对该多糖的化学结构进行了表征.结果表明,2个多糖均为1,4连接的聚甘露糖醛酸.展开更多
文摘A series of oligomannuronates with series degree of polymerization（DP28） were prepared by acid hydrolysis from alginate-derived homopolymannuronate blocks, and the structures of the oligosaccharides were analyzed. The macromolecule of alginate was treated by partial acid hydrolysis and fractionated at pH2.85 resulting in homopolymannuronate blocks. The homopolymer was degraded by acid hydrolysis, and the oligosaccharides were separated and purified by gel chromatography. The oligosaccharides were characterized by fluorophore-assisted carbohydrate electrophoresis（FACE）, and the structures of derived oligomannuronates were determined by ESI-MS, NMR as well as FTIR analysis.
文摘以裙带菜(Undaria pinnatifida,wakame)为原料,经水提醇沉、DEAE-Sepharose Fast Flow、SephacrylS-300和Sephacryl S-200凝胶柱分离纯化,得到2个酸性多糖UPPS03和UPPS04.高效凝胶渗透色谱测试结果表明,其为均一多糖,平均分子量分别为3.6×104和1.1×104.采用糖组成分析、高碘酸氧化及Smith降解、糖醛酸还原、甲基化、红外光谱和核磁共振等方法对该多糖的化学结构进行了表征.结果表明,2个多糖均为1,4连接的聚甘露糖醛酸.
