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Gas exchange in modified atmosphere packaging. 1: A new theoretical approach for micro‐perforated packs
Author(s) -
RENAULT PIERRE,
SOUTY MICHEL,
CHAMBROY YVES
Publication year - 1994
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.1994.tb02079.x
Subject(s) - carbon dioxide , oxygen , diffusion , modified atmosphere , atmosphere (unit) , chemistry , argon , volume (thermodynamics) , water vapor , nitrogen , thermodynamics , limiting oxygen concentration , respiration , materials science , physics , organic chemistry , botany , food science , shelf life , biology
Gas transport and exchange through the perforations in micro‐perforated packs used in modified atmosphere packaging were numerically modelled by using Stephan‐Maxwell laws, and, outside these perforations, by Fick's law. the model accounts simultaneously for oxygen, carbon dioxide, nitrogen, argon and water vapour. Fruit and vegetable respiration was approximated by Michaelis‐Menten kinetics depending on oxygen concentration with an uncompetitive inhibition due to carbon dioxide. Concentration equilibrium was reached after 2 to 3 days, depending on the void volume and on the diffusion properties of the packs. the equilibrium concentrations were dependent on the number of perforations, their diameter, the thickness of the film and the temperature. However, a pack which makes 10% oxygen possible within the pack at 10°C might induce anaerobiosis at 20°C.