| 微生物胞外多糖PS-9415的分子结构 |
| |
| 引用本文： | 彭志英,张宁,钟颜麟.微生物胞外多糖PS-9415的分子结构[J].华南理工大学学报(自然科学版),2002,30(3):78-82. |
| |
| 作者姓名： | 彭志英 张宁 钟颜麟 |
| |
| 作者单位： | 华南理工大学,生物科学与工程研究中心,广东,广州,510640 |
| |
| 基金项目： | 广东省科技攻关项目 (粤财工 [98]2 78号 )~~ |
| |
| 摘 要： | 研究了放射形土壤杆菌 (Agrobacteriumradiobacter)Q94 15胞外多糖PS_94 15的分子结构 .PS_94 15是由D -葡萄糖、D -半乳糖组成的中性杂多糖 ,其摩尔比为 0 .83∶1,含有乙酰基和丙酮酰基 .其重均分子量 Mw=2 0 .7× 10 4 u ,数均分子量 Mn=18.2× 10 4 u( Mw/ Mn=1.14 ) .PS_94 15为典型的热敏胶 ,其θm=90℃ .PS_94 15溶液在温度变化时有构象转变 ,凝胶为无定型网络结构 .
|
| 关 键 词： | 放射形土壤杆菌 胞外多糖 分子结构 凝胶 PS－9415 D－葡萄糖 D－半乳糖 微生物生物化学 |
Molecular Structure of Microbial Exopolysaccharides PS-9415 |
| |
| Peng Zhi_ying,Zhang Ning,Zhong Yan_lin.Molecular Structure of Microbial Exopolysaccharides PS-9415[J].Journal of South China University of Technology(Natural Science Edition),2002,30(3):78-82. |
| |
| Authors: | Peng Zhi_ying Zhang Ning Zhong Yan_lin |
| |
| Abstract: | The molecular structure of PS-9415, an exopolysaccharide from Agrobacterium radiobacter Q9415, is researched. It was found that PS-9415 is a kind of heteropolysaccharide containing D-glucose, D-galactose, pyruvic acid and acetyl groups. D-glucose and D-galactose are in the approximate molar ratio of 0.83∶1. The average weight molecular mass (w) of PS-9415 is 20.7×104 u, average number molecular mass (n) is 18.2×104 u, and w/n is 1.14. The PS-9415 gum is a typical thermo-sensitive polysaccharide with θm=90 ℃. The conformational transformation of the PS-9415 sol was observed. Furthermore, the PS-9415 gel is a non-crystalline network. |
| |
| Keywords: | Agrobacterium radiobacter exopolysaccharide molecular structure gel |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
