Khan, Avik; Salmieri, Stéphane; Fraschini, Carole; Bouchard, Jean; Riedl, Bernard et Lacroix, Monique (2014). Genipin cross-linked nanocomposite films for the immobilization of antimicrobial agent ACS Applied Materials & Interfaces , vol. 6 , nº 17. pp. 15232-15242. DOI: 10.1021/am503564m.
Prévisualisation |
PDF (Le document est disponible dans la thèse en version article accepté à partir de la page 85 à l’adresse URL suivante : http://espace.inrs.ca/id/eprint/2746)
- Image de couverture
Télécharger (226kB) | Prévisualisation |
Résumé
Cellulose nanocrystal (CNC) reinforced chitosan based antimicrobial films were prepared by immobilizing nisin on the surface of the films. Nanocomposite films containing 18.65 mug/cm(2) of nisin reduced the count of L. monocytogenes by 6.73 log CFU/g, compared to the control meat samples (8.54 log CFU/g) during storage at 4 degrees C in a Ready-To-Eat (RTE) meat system. Film formulations containing 9.33 mug/cm(2) of nisin increased the lag phase of L. monocytogenes on meat by more than 21 days, whereas formulations with 18.65 mug/cm(2) completely inhibited the growth of L. monocytogenes during storage. Genipin was used to cross-link and protect the activity of nisin during storage. Nanocomposite films cross-linked with 0.05% w/v genipin exhibited the highest bioactivity (10.89 mug/cm(2)) during the storage experiment, as compared to that of the un-cross-linked films (7.23 mug/cm(2)). Genipin cross-linked films were able to reduce the growth rate of L. monocytogenes on ham samples by 21% as compared to the un-cross-linked films. Spectroscopic analysis confirmed the formation of genipin-nisin-chitosan heterocyclic cross-linked network. Genipin cross-linked films also improved the swelling, water solubility, and mechanical properties of the nanocomposite films.
Type de document: | Article |
---|---|
Mots-clés libres: | Listeria monocytogenes; antimicrobial films; chitosan; genipin; nisin; surface modification |
Centre: | Centre INRS-Institut Armand Frappier |
Date de dépôt: | 01 juin 2017 15:35 |
Dernière modification: | 01 juin 2017 15:35 |
URI: | https://espace.inrs.ca/id/eprint/3067 |
Gestion Actions (Identification requise)
Modifier la notice |