Combined effects of microencapsulated essential oils and irradiation from gamma and X-ray sources on microbiological and physicochemical properties of dry fermented sausages during storage

Ji, Jiali; Allahdad, Zahra; Sarmast, Elham; Salmieri, Stéphane et Lacroix, Monique ORCID: https://orcid.org/0000-0002-2042-4033 (2022). Combined effects of microencapsulated essential oils and irradiation from gamma and X-ray sources on microbiological and physicochemical properties of dry fermented sausages during storage LWT , vol. 159 , nº 113180. pp. 1-9. DOI: 10.1016/j.lwt.2022.113180.

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Résumé

Essential oils (EOs) or EOs encapsulated in alginate and alginate-cellulose nanocrystal combined with 1.5 kGy X-ray (0.76 kGy/h) or γ-ray (6.37 kGy/h) irradiation were applied on dry fermented sausages (DFS). Microbiological quality was tested in terms of the reduction of Escherichia coli O157:H7 cocktail, Listeria monocytogenes, molds and yeasts, lactic acid bacteria (LAB), and total mesophilic bacteria (TMF) during storage at room temperature (20 ± 1 °C) for 8 weeks. Physicochemical quality was tested by following the changes of texture and color of sausages. Synergistic effects were observed with combined treatments with γ-irradiation on inhibiting E. coli O157:H7 cocktail and LAB and with X-ray on inhibiting E. coli O157:H7 cocktail. Extensive inhibition of L. monocytogenes, molds and yeasts, and TMF was also noticed during storage. Antimicrobial formulations combined with γ-irradiation did not show adverse effects on texture and color of sausages while treatment with X-ray resulted in the reduction of redness and increase of hardness. However, the differences of texture were eliminated during storage. © 2022 The Authors

Type de document:	Article
Mots-clés libres:	Essential oils; Microencapsulation; Gamma and X-ray irradiation; Dry fermented sausage; Microbiological and physicochemical properties
Centre:	Centre INRS-Institut Armand Frappier
Date de dépôt:	22 juin 2022 19:38
Dernière modification:	22 juin 2022 19:38
URI:	https://espace.inrs.ca/id/eprint/12356

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