title: Mechanistic model coupling gas exchange dynamics and Listeria monocytogenes growth in modified atmosphere packaging of non respiring food.
abstract: A mechanistic model coupling O2 and CO2 mass transfer (namely diffusion and solubilisation in the food itself and permeation through the packaging material) to microbial growth models was developed aiming at predicting the shelf life of modified atmosphere packaging (MAP) systems. It was experimentally validated on a non-respiring food by investigating concomitantly the O2/CO2 partial pressure in packaging headspace and the growth of Listeria monocytogenes (average microbial count) within the food sample. A sensitivity analysis has revealed that the reliability of the prediction by this "super-parametrized" model (no less than 47 parameters were required for running one simulation) was strongly dependent on the accuracy of the microbial input parameters. Once validated, this model was used to decipher the role of O2/CO2 mass transfer on microbial growth and as a MAP design tool: an example of MAP dimensioning was provided in this paper as a proof of concept.
authors.affiliation: UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France.
authors.forename: E
authors.initials: E
authors.lastname: Chaix
authors.affiliation: UMR 1145 Ingénierie Procédés Aliments (GENIAL), AgroParisTech, INRA, 1 avenue des Olympiades, F-91300 Massy, France.
authors.forename: B
authors.initials: B
authors.lastname: Broyart
authors.affiliation: Université de Brest, EA3882, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, UMT14.01 SPORE-RISK, 6 rue de l'Université, F-29334 Quimper, France.
authors.forename: O
authors.initials: O
authors.lastname: Couvert
authors.affiliation: UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France.
authors.forename: C
authors.initials: C
authors.lastname: Guillaume
authors.affiliation: UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France.
authors.forename: N
authors.initials: N
authors.lastname: Gontard
authors.affiliation: UMR 1208 IATE Agropolymers Engineering and Emerging Technologies, Université de Montpellier, CIRAD, INRA, Montpellier Supagro, 2 place Pierre Viala, F-34060 Montpellier Cedex 1, France. Electronic address: guillard@univ-montp2.fr.
authors.forename: V
authors.initials: V
authors.lastname: Guillard
mesh_terms: D001272:Atmosphere; D002245:Carbon Dioxide; D005516:Food Microbiology; D018857:Food Packaging; D005519:Food Preservation / Q000379:methods / Q000706:statistics & numerical data; D005740:Gases; D008089:Listeria monocytogenes / Q000254:growth & development* / Q000502:physiology; D008962:Models, Theoretical; D009584:Nitrogen; D010100:Oxygen; D015203:Reproducibility of Results; D014618:Vacuum
chemical_list: D005740:Gases; D002245:Carbon Dioxide; D009584:Nitrogen; D010100:Oxygen
keywords: Gas transfer; Listeria monocytogenes; Mathematical modelling; Modified atmosphere packaging; Predictive microbiology