Takala, Perlette N., Vu, Khanh Dang, Salmieri, Stéphane, Khan, Ruhul A. et Lacroix, Monique (2013). Antibacterial effect of biodegradable active packaging on the growth of Escherichia coli, Salmonella typhimurium and Listeria monocytogenes in fresh broccoli stored at 4°C LWT - Food Science and Technology , vol. 53 , nº 2. p. 499-506. DOI: 10.1016/j.lwt.2013.02.024.
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In this study, bioactive films were prepared using two types of film matrices based on i) methylcellulose (MC) and ii) a blend of polycaprolactone/alginate (PCL/ALG). Two antimicrobial formulations named as A [organic acids mixture+rosemary extract+Asian spice essential oil (EO)] and B [organic acids mixture+rosemary extract+Italian spice EO] were added in each type of films during casting. Broccoli florets were inoculated separately with Listeria monocytogenes, Escherichia coli, Salmonella typhimurium to have a final microbial concentration of 5logsCFU/g sample. Then, antimicrobial films were inserted into packaging containing inoculated broccoli and the package was then sealed under air in standard condition of storage for 12 days at 4°C. It was found that films containing formulation A had better efficiency against S.typhimurium, with a significant reduction of bacterial concentration until total inhibition after 12 days of storage. In general, bioactive films showed a significant reduction and a good capacity to control the growth of L.monocytogenes and E.coli at short-term storage (4 days). Therefore, these results demonstrated the high antimicrobial potential of both types of films via the diffusion of antimicrobial volatiles on pathogenous bacteria in pre-cut vegetables.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Bioactive films; Methylcellulose; Polycaprolactone; Alginate; Broccoli; Antimicrobial effect; Organic acids; Essential oils |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 01 juin 2017 20:33 |
| Dernière modification: | 01 juin 2017 20:37 |
| URI: | https://espace.inrs.ca/id/eprint/2981 |
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