Synergy of the agarose-carob galactomannan blend inferred from NMR and rheological studies

✍ Scribed by Tristan Turquois; François-R. Taravel; Cyrille Rochas

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 711 KB
• Volume: 238
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(93)87003-b

✦ Synopsis

Analysis of 13C NMR spectra of carob-agarose binary gels shows evidence for interaction and intermolecular binding. The signals of C-l, C-4-C-5, and C-6 suggested the existence of three kinds of galactomannan chains. The first one, having a low content of galactose, was strongly bound and immobile. Chains having a high content of galactose could still be detected and were divided into two groups according to their mobility. Measurements of the elastic modulus and yield stress of different carob-agarose blends indicated that the gel structure of these mixed polysaccharides is defined by a coupled network with specific junction zones.