Modelling combined effects of temperature and pH on the heat resistance of spores of Bacillus cereus

Abstract : The development of relationships between the pH of a heating medium and the thermal resistance of contaminant microorganisms is important and of a public health significance. A number of mathematical models have been presented in recent years, including that of Mafart and Leguérinel (1998) . However, in this This model , the effect of possible interactions between temperature and pH on D-values was not assessed. The consequences of ignoring interaction terms in models has been assessed and a comparison with Mafart's model that includes an interaction term showed that interaction terms can be neglected and that Mafart's model can be used in thermal process calculations. It appears possible to adopt a standard value of zpH , for example the 3.6 value and the conventional concept of biological destruction value L(T) (ratio of the sterilization value and the exposure time at a fixed heating temperature) may then be extended to L(T,pH) (the same ratio at a fixed temperature with a fixed pH of the heating menstruum).
Type de document :
Article dans une revue
Food Microbiology, Elsevier, 1998, pp.625-630
Liste complète des métadonnées

Littérature citée [9 références]  Voir  Masquer  Télécharger
Contributeur : Marielle Le Guen <>
Soumis le : mardi 20 décembre 2011 - 15:14:40
Dernière modification le : mercredi 10 janvier 2018 - 14:42:39
Document(s) archivé(s) le : mercredi 21 mars 2012 - 02:22:01


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


  • HAL Id : hal-00653497, version 1



Stéphane Gaillard, Ivan Leguérinel, Pierre Mafart. Modelling combined effects of temperature and pH on the heat resistance of spores of Bacillus cereus. Food Microbiology, Elsevier, 1998, pp.625-630. 〈hal-00653497〉



Consultations de la notice


Téléchargements de fichiers