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Controlled Release of Thyme Oil From CNC Alginate Beads fro Antimicrobial Purposes Against Listeria Innocuain Ground Beef

Criado, Paula; Jamshidian, Majid; Salmieri, Stéphane; Fraschini, Carole; Lacroix, Monique (2016). Controlled Release of Thyme Oil From CNC Alginate Beads fro Antimicrobial Purposes Against Listeria Innocuain Ground Beef In: Report of the 3rd RCM of the CRP on Application of Radiation Technology in the Development of Advanced Packaging Materials for Food Products. IAEA-TECDOC . IAEA, Vienne, Autriche, p. 101-116.

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Résumé

Food spoilage is one of the most surveyed factors in food industries. Due to its nutritional value, meat represents a vector for pathogenic bacteria growth such as Listeria monocytogenes, Salmonella and Escherichia coli. In order to overcome this drawback, preservatives are added to meat. Thyme vulgaris, is an essential oil that is extracted from plants and known for its antioxidant and antimicrobial properties. However, because of volatile nature and chemical instability, thyme oil required protection in order to prevent secondary reactions or transformations caused by external factors. The purpose of this study consisted firstly on the encapsulation of thyme oil (0, 1, 3%) into an alginate matrix loaded with CNC (0, 10,20, 30, 40%). The encapsulation was made by a microfluidized emulsion and extruded via ionic gelation into calcium chloride (CaCl2) at 5% (w/w). Parameters like thyme oil concentration and CNC concentration were important to determine their effect on the encapsulation efficiency, loading capacity and release into simulating solvent (ethanol 10%) and antimicrobial properties. In vitrotests demonstrated that encapsulation efficiency can increase approximately from 60 to 80% as soon CNC increased from 0-40%.It seems possible that the loading capacity of 0.1% (EO/ bead) with an emulsion concentration of 3% was optimal to control the release during 7 days in simulating solvent compared to 1%. In addition, this formulation allowed to observe a high effect sufficiently to show an inhibition diameter of 4 mm against Listeria innocuagrowth on the agar diffusion assay. Finally, in situtest demonstrated that synergic effect was found when CNC is loaded in alginate beads and irradiation doses of 0.5 kGy are applied.

Type de document: Chapitre de livres
Informations complémentaires: 11-15 July 2016. Chapter 7. The CRP was constituted with 14 participants. The achievements are presented in this final report, giving first the background information and the list of publication by participants, followed by individual full reports. The IAEA wishes to thank all participants of the CRP for their valuable contributions. The IAEA officer responsible for this CRP was Agnes Safrany of the Division of Physical and Chemical Sciences.
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Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 13 mars 2019 03:52
Dernière modification: 13 mars 2019 03:52
URI: http://espace.inrs.ca/id/eprint/7903

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