Modelling the influence of palmitic, palmitoleic, stearic and oleic acids on apparent heat resistance of spores of Bacillus cereus NTCC 11145 and Clostridium sporogenes Pasteur 79.3

Brice Mvou Lekogo 1 Louis Coroller 1 Anne Gabrielle Mathot 1 Pierre Mafart 1 Ivan Leguérinel 1, *
* Auteur correspondant
1 LUBEM Quimper - laboratoire universitaire de biodiversité et écologie microbienne- IUT de Quimper
UBO - Université de Brest
Abstract : Heat resistance of spores is affected by many factors such as temperature, pH, water activity (aw) and others. Previous studies have reported that free fatty acids can affect the germination and growth of bacterial spores. In this study, we investigated the influence of free fatty acids in heating medium or in recovery medium on the heat resistance of spores of Bacillus cereus NTCC 11145 and Clostridium sporogenes Pasteur 79.3. Four free fatty acids were studied: palmitic, palmitoleic, stearic and oleic acid. During thermal treatments, the impact of these FFA in heating media was generally low, but the presence of free fatty acids in the recovery medium highly decreases bacterial spore apparent heat resistance, particularly with unsaturated fatty acids. A mathematical model was developed to describe and quantify the influence of free fatty acids in recovery media on the D-values. The z'FFA parameter values which quantify the impact of free fatty acids were determined. The variation of this parameter value according to the free fatty acid type was compared with MIC value variation given in the literature. The model enables the decrease in D-values in the presence of free fatty acids to be estimated. The high concentrations of free fatty acids in liver or canned duck may explain the microbial stability with low sterilization values applied.
Keywords : free fatty acids bacterial spores heat resistance recovery medium
Type de document :
Article dans une revue
International Journal of Food Microbiology, Elsevier, 2010, pp.242-247
Liste complète des métadonnées

Littérature citée [13 références]  Voir  Masquer  Télécharger
http://hal.univ-brest.fr/hal-00654177
Contributeur : Marielle Le Guen <>
Soumis le : mercredi 21 décembre 2011 - 09:49:56
Dernière modification le : jeudi 13 septembre 2018 - 14:56:02
Document(s) archivé(s) le : lundi 5 décembre 2016 - 10:36:56

Fichiers

Mvou_et_al_2010_IJFM_Vol_141_p...
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-00654177, version 1

Collections

UNIV-BREST | LUBEM

Citation

Brice Mvou Lekogo, Louis Coroller, Anne Gabrielle Mathot, Pierre Mafart, Ivan Leguérinel. Modelling the influence of palmitic, palmitoleic, stearic and oleic acids on apparent heat resistance of spores of Bacillus cereus NTCC 11145 and Clostridium sporogenes Pasteur 79.3. International Journal of Food Microbiology, Elsevier, 2010, pp.242-247. 〈hal-00654177〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

218

Téléchargements de fichiers

446

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD