Begum, Tofa; Follett, Peter; Jaiswal, Lily; de Guibert, d; Salmieri, Stéphane et Lacroix, Monique 
ORCID: https://orcid.org/0000-0002-2042-4033
(2024).
Release kinetics and biological properties of active films based on cellulose nanocrystal-chitosan in combination with γ-irradiation to mitigate microbial load in rice
Food Hydrocolloids
, vol. 150
, nº 109697.
pp. 1-16.
DOI: 10.1016/j.foodhyd.2023.109697.
Résumé
Nanoemulsions (NEs) of two antimicrobial formulations (AF-1 and AF-2), a mixture of essential oils and citrus extracts, were prepared by microfluidization. For optimization, a central composite design was used to ascertain the effect of independent variables (pressure, number of cycles, and emulsifier concentration) on the physical properties of NEs [i.e., droplet size (DS), polydispersity index (PDI), zeta potential (ζ), and encapsulation efficiency (EE)] and compare with coarse emulsion. The optimized AF-1 and AF-2 values had DS of 116 and 40 nm, PDI of 0.17 and 0.2, ζ-potential of 49 and 32.3 mV, and EE of 77 and 79%, respectively. The microbicidal properties of the NEs against Escherichia coli O157:H7, Salmonella Typhimurium, Aspergillus niger, Penicillium chrysogenum, and Mucor circinelloides were significantly (P ≤ 0.05) higher than the coarse emulsion. The NEs of both AFs were incorporated into a chitosan-based (CH) film. In situ tests with rice using bioactive CH-based nanocomposite films (BCHNF) reinforced with cellulose nanocrystals (CNCs) were tested against selected bacteria and fungi with and without γ-irradiation (750Gy) and stored for eight weeks. The BCHNF alone reduced 50–71 % of bacterial and fungal growth compared to the controls, while the combined action of γ-irradiation and films reduced 73–93 % of the tested microbial growth compared to untreated controls. Incorporation of CNC into BCHNF demonstrated a predictable pattern of slower release of active components (32–39 %) over the eight week period compared to the bioactive films without CNC. The sensory qualities of rice did not change significantly after BCHNF treatments.
| Type de document: | Article |
|---|---|
| Informations complémentaires: | Export Date: 22 January 2024; Cited By: 0 |
| Mots-clés libres: | - |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 28 janv. 2024 15:06 |
| Dernière modification: | 28 janv. 2024 15:06 |
| URI: | https://espace.inrs.ca/id/eprint/14153 |
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