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Effects of oxidative treatment on the physicochemical, rheological and functional properties of oat β-glucan

Author:
de Moura, Fernanda Aline, Pereira, Juliane Mascarenhas, da Silva, Débora Oliveira, Zavareze, Elessandra da Rosa, da Silveira Moreira, Angelita, Helbig, Elizabete, Dias, Alvaro Renato Guerra
Source:
Food chemistry 2011 v.128 no.4 pp. 982-987
ISSN:
0308-8146
Subject:
adhesion, binding capacity, cholic acid, digestion, food quality, foods, glucose, hardness, hydrogen peroxide, oat bran, oats, oxidation, physicochemical properties, viscosity
Abstract:
The objective of this work was promote oxidation of β-glucan from oat bran with hydrogen peroxide at different concentration levels (0.3%, 0.6% and 0.9% H₂O₂) and reaction times (30 and 60min), and evaluate the physicochemical and functional properties of isedoxidised β-glucan with in-vitro tests. An increase in carbonyl and carboxyl groups and alterations in swelling power were verified in the oxidised β-glucan. The cholic acid binding capacity increased in the oxidised β-glucan; however, the fat binding capacity was not affected. After chemical digestion, the available glucose of the oxidised β-glucan was increased. Oxidation with hydrogen peroxide decreased the viscosity, hardness, adhesiveness and gumminess of the β-glucan gels. More studies are necessary to determine the effect of the oxidative treatment of β-glucan on its technological properties in food products, and biological properties should be examined with in-vivo studies.
Agid:
505782