MOLECULAR ARCHITECTURES AND FUNCTIONAL-PROPERTIES OF GELLAN GUM AND RELATED POLYSACCHARIDES
MOLECULAR ARCHITECTURES AND FUNCTIONAL-PROPERTIES OF GELLAN GUM AND RELATED POLYSACCHARIDES
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DOI：
10.1016/s0924-2244(00)89022-6
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发表时间：
1995-05-01
影响因子：
15.3
通讯作者：
RADHA, A
中科院分区：
文献类型：
--
作者：
CHANDRASEKARAN, R;RADHA, A
由不相关的细菌物种产生的某些直链和支链多糖由于其保守的骨架结构而被归为结冷胶家族。所有这些都具有优异的流变性能，因此在工业应用中是有用的。这些多糖在溶液中的物理化学调查和结构研究，他们在固态使用X-射线衍射提供了相互补充的结果。尽管存在取代基和侧链，但结冷胶所特有的坚固的双螺旋形态在树胶家族的其他成员中普遍存在。离子和水分子促进了双螺旋之间的缔合。用结冷胶家族的成员制成的溶液和凝胶的观察到的物理性质可以根据聚合物螺旋之间发生的相互作用在分子水平上直接合理化。
Certain linear and branched polysaccharides produced by unrelated species of bacteria are grouped in the gellan gum family because of their conserved backbone structures. All have excellent rheological properties and, thus, are useful in industrial applications. Physicochemical investigations of these polysaccharides in solution and structural studies of them in the solid state using X-ray diffraction have provided mutually complementary results. The sturdy double-helix morphology that is characteristic of gellan gum prevails in other members of the gum family in spite of the presence of substituents and side chains. Association between double helices is facilitated by ions and water molecules. The observed physical properties of solutions and gels made with members of the gellan gum family can be directly rationalized at the molecular level in terms of the interactions taking place between the polymer helices.