Autores UPV
Arrieta Marina Patricia,
MERCEDES PELTZER,
López Martínez Juan,
MC Garrigos,
Valente Arthur,
Jiménez Migallön Alfonso
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.
