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Heat Treatment and beta-Carotene Incorporation Effect in the Interaction of beta-Lactoglobulin and Carboxymethylcellulose System
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Heat Treatment and beta-Carotene Incorporation Effect in the Interaction of beta-Lactoglobulin and Carboxymethylcellulose System
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Journal Article
Heat Treatment and beta-Carotene Incorporation Effect in the Interaction of beta-Lactoglobulin and Carboxymethylcellulose System
2016
Overview
Encapsulation technologies using proteins or polysaccharides can be employed with the purpose of solubilizing and protecting carotenoids. However, information on the role of protein and polysaccharide interactions is still slightly limited. The aim of this work was to investigate the effect of [beta]-carotene linked to protein [beta]-lactoglobulin (BLG) in the interaction carboxymethylcellulose (CMC) using isothermal titration calorimetry (ITC). Firstly, BLG and CMC interaction was assessed by means of turbidity analysis. Based on the results of turbidity, the thermodynamic profile of BLG-CMC complexes at pH 4.0 was obtained using ITC analysis at 25 °C. Afterward, it was evaluated the effect of a thermal treatment applied to the BLG (68 °C for 50 min) in the interaction with CMC also using ITC and circular dichroism (CD). ITC and CD analysis showed that the heat treatment applied on BLG did not cause changes in molecular interactions. The binding isotherm of BLG-CMC complexes incorporated with [beta]-carotene showed an increase in the molar ratio and a slight decrease in enthalpy of the system. Incorporation of [beta]-carotene in the system did not significantly affect the BLG and CMC interaction, suggesting this system can be applied in food application as encapsulation.
Publisher
Springer Nature B.V
Subject
