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

• Type: Article in International Scientific Journal
• Date: 2000

Authors

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

Journal

Title: International Journal of Biological Macromolecules

Vol. 27 No. 5

Pages: 349-353

ISSN: 0141-8130

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 34 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5