Abstract
Analysis of 13C NMR spectra of carob-agarose binary gels shows evidence for interaction and intermolecular binding. The signals of C-1, C-4C-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.
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