Functional properties of sodium and calcium caseinate antimicrobial active films containing carvacrol

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Title: Functional properties of sodium and calcium caseinate antimicrobial active films containing carvacrol
Authors: Arrieta, Marina Patricia | Peltzer, Mercedes Ana | López, Juan | Garrigós, María del Carmen | Valente, Artur J.M. | Jiménez, Alfonso
Research Group/s: Análisis de Polímeros y Nanomateriales
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Keywords: Active food packaging | Edible films | Carvacrol | Caseinates | Dye diffusion | Antimicrobial properties
Knowledge Area: Química Analítica
Issue Date: Jan-2014
Publisher: Elsevier
Citation: Journal of Food Engineering. 2014, 121: 94-101. doi:10.1016/j.jfoodeng.2013.08.015
Abstract: Active edible films were prepared by adding carvacrol into sodium caseinate (SC) and calcium caseinate (CC) matrices plasticized with two different glycerol concentrations (25 and 35 wt%) prepared by solvent casting. Functional characterisation of these bio-films was carried out by determination of some of their physico-chemical properties, such as colour, transparency, oxygen barrier, wettability, dye permeation properties and antibacterial effectiveness against Gram negative and Gram positive bacteria. All films exhibited good performance in terms of optical properties in the CIELab space showing high transparency. Carvacrol was able to reduce CC oxygen permeability and slightly increased the surface hydrophobicity. Dye diffusion experiments were performed to evaluate permeation properties. The diffusion of dye through films revealed that SC was more permeable than CC. The agar diffusion method was used for the evaluation of the films antimicrobial effectiveness against Escherichia coli and Staphylococcus aureus. Both SC and CC edible films with carvacrol showed inhibitory effects on both bacteria.
Sponsor: This research was supported by the Ministry of Science and Innovation of Spain through the projects MAT2011-28468-C02-01, MAT2011-28468-C02-02 and HP2008-0080. M.P. Arrieta thanks Fundación MAPFRE for "Ignacio Hernando de Larramendi 2009-Medio Ambiente" fellowship (MAPFRE-IHL-01).
URI: http://hdl.handle.net/10045/37272
ISSN: 0260-8774 (Print) | 1873-5770 (Online)
DOI: 10.1016/j.jfoodeng.2013.08.015
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.jfoodeng.2013.08.015
Appears in Collections:INV - NANOBIOPOL - Artículos de Revistas

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