Rheological properties of mixtures of kappa-carrageenan from Hypnea musciformis and galactomannan from Cassia javanica

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

C. T. Andrade (Autor) Outra; E. G. Azero (Autor) Outra; L. Luciano (Autor) Outra; Maria do Pilar Gonçalves (Autor) FEUP

Revista

Título: International Journal of Biological Macromolecules

Vol. 27 Nº 5

Páginas: 349-353

ISSN: 0141-8130

Editora: Elsevier

Indexação

ISI Web of Knowledge - 27 Citações

Scopus - 34 Citações

Outras Informações

ID Authenticus: P-000-Z7E

DOI: 10.1016/s0141-8130(00)00139-2

Abstract (EN): Mixed gels of kappa-carrageenan (kappa-car) from Hypnea musciformis and galactomannans (Gal) from Cassia javanica (CJ) and locust bean gum (LBG) were compared using dynamic viscoelastic measurements and compression tests. Mixed gels at 5 g/l of total polymer concentration in 0.1 M KCl showed a synergistic maximum in viscoelastic measurements for kappa-car/CJ and kappa-car/LBG at 2:1 and 4:1 ratios, respectively. The synergistic maximum obtained from compression tests carried out for mixed gels at 10 g/l of total polymer concentration in 0.25 M KCl was the same for both kappa-car/CJ and kappa-car/LBG gels. An enhancement in the storage modulus (G') and the loss modulus (G ") was observed in the mechanical spectra for the mixtures in relation to kappa-car. The proportionally higher increase in G " compared with G', as indicated by the values of the loss tangent (tan delta), suggests that the Gal adhere non-specifically to the kappa-car network.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5