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. pp. 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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