Antilisterial and physical properties of biopolymer films containing lactic acid bacteria

摘要: Abstract Novel biopolymer films were developed and used to control Listeria innocua in an artificially contaminated synthetized medium. Two hydrocolloids, sodium caseinate (NaCas) methylcellulose (MC), two bacteriocin-producing lactic acid bacteria (LAB), Lactobacillus acidophilus reuteri, tested. Bioactive cultures added directly the film forming solution obtained by casting. In order study impact of incorporation bacterial cells into matrix, water vapour permeability, optical mechanical properties dry evaluated. Furthermore, survival LAB antimicrobial potential bioactive against L. studied. Results showed that use altered film's physical properties. Films enriched with exhibit higher gloss transparency whereas no significant modifications observed terms tensile These less-effective barriers, since a increase can be WVP values. As far as food safety is concerned, these are interesting, novel approach. refrigeration conditions, permit complete inhibition L. innocua for week. Viability was films, although bacteriocin production greater polysaccharide matrix. The best results made methylcellulose, without differences between