Overview

Gellan gum, a microbial polysaccharide, consisting of tetra-saccharide unit, glucose, glucuronic acid, glucose and rhamnose, forms a transparent gel which is heat-resistant in the presence of divalent cations. Since 1989, the collaborative research group was organised in the Research Group of Polymer Gels affiliated to the Society of Polymer Science, Japan, consisting of various laboratories with different disciplines to clarify the mechanism using the common purified sample. This special issue contains 19 papers on the molecular conformation, gel-sol transition, interaction of gellan and water, cations and sugar, based on rheology, NMR, ESR, DSC, light scattering, osmotic pressure, small angle x-ray scattering, dielectric measurement, atomic force microscopy and the industrial application of gellan gum presented at the 4th International Conference on Hydrocolloids - OCUIS '98 by the collaborative group members and by international experts.

Full Product Details

Author:   K. Nishinari
Publisher:   Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
Imprint:   Springer-Verlag Berlin and Heidelberg GmbH & Co. K
Volume:   114
Weight:   0.540kg
ISBN:  

9783540663898

ISBN 10:   3540663894
Pages:   135
Publication Date:   13 December 1999
Audience:   College/higher education ,  Professional and scholarly ,  Undergraduate ,  Postgraduate, Research & Scholarly
Format:   Hardback
Publisher's Status:   Active
Availability:   Temporarily unavailable  
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Table of Contents

Characterization of gellan gum in aqueous NaCl solution.- Temperature dependence of the conformational properties of sodium-type gellan gum in aqueous solutions.- Hydrogen-bonding behavior of gellan in solution during structural change observed by 1H NMR and circular dichroism methods.- Multinuclear NMR study on the sol-gel transition of gellan gum.- Electron spin resonance study on the sol-gel transition of gellan gum aqueous solution by the addition of paramagnetic metal- ions.- Dielectric study on the dynamics of an aqueous solution of gellan gum.- The sol-gel transition of gellan gum aqueous solutions in the presence of various metal salts.- Differential scanning calorimetry and structural studies of the sol-gel transition of gellan gum in water.- Light scattering, sound velocity and viscoelastic behavior of aqueous gellan solutions.- Rheological properties of the gellan /water system.- Rheological and thermal properties near the sol-gel transition of gellan gum aqueous solutions.- Effects of sugar on the sol-gel transition in gellan gum aqueous solutions.- Structural change of polymer chains of gellan monitored by circular dichroism.- Phase transitions of gellan-water systems.- A fibrous model for gellan gels from atomic force microscopy studies.- Rheology and gelation of deacylated gellan polysaccharide with Na+ as the sole counterion.- Molecular origins of the rheology of high-sugar gellan systems.- The latest technologies for the application of gellan gum.- Gelatin alternatives for the food industry.

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