Alex López Córdoba, Lorena Deladino, Miriam Martino
CIDCA, Centro de Investigación y Desarrollo en Criotecnología de los Alimentos, CONICET, Fac. Cs. Exactas (UNLP), 47 y 116, La Plata, Argentina. alexlcordoba@gmail.com
Carbohydrate polymers 2013 Jun 5A liquid extract of yerba mate (Ilex paraguariensis), with antioxidant properties was encapsulated in calcium-alginate hydrogels containing corn starch as filler at different concentrations. Hydrogel beads were characterized for morphological and size aspects, encapsulation efficiency, Fourier Transform Infrared Spectrometry (FT-IR) and thermal behavior. Addition of starch improved the encapsulation efficiency from 55 to 65%. In vitro release of polyphenols was analyzed in model gastric and intestinal media. The recovery of encapsulated polyphenols occurred mainly in the simulated gastric fluid (85%). Kinetics and release mechanism were satisfactorily fitted to semi-empirical models. The incorporation of starch filler (2 g/100 mL) in calcium alginate hydrogels modified the release profile of polyphenols in acidic medium. In calcium alginate beads, a release mechanism combining erosion and diffusion was observed. Whereas, for polyphenols release of starch loaded beads, only diffusion was relevant. Copyright © 2013 Elsevier Ltd. All rights reserved.
Alex López Córdoba, Lorena Deladino, Miriam Martino. Effect of starch filler on calcium-alginate hydrogels loaded with yerba mate antioxidants. Carbohydrate polymers. 2013 Jun 5;95(1):315-23
PMID: 23618275
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