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DESCRIPTION of LOG PHASE GROWTH FOR SELECTED MICROORGANISMS DURING MODIFIED ATMOSPHERE STORAGE 1
Author(s) -
ZHAO YANYUN,
WELLS JOHN HENRY,
MARSHALL DOUGLAS L.
Publication year - 1992
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1992.tb00158.x
Subject(s) - arrhenius equation , carbon dioxide , atmosphere (unit) , thermodynamics , chemistry , population , pseudomonas fluorescens , modified atmosphere , mineralogy , analytical chemistry (journal) , activation energy , environmental chemistry , food science , physics , geology , organic chemistry , bacteria , paleontology , demography , sociology , shelf life
Two mathematical descriptions based on (1) a modified and additive Arrhenius equation and (2) a modified Arrhenius temperature characteristic equation were developed to describe the combined effects of time, temperature and initial gas composition of modified atmosphere storage on the population growth rate coefficients of Listeria monocytogenes and Pseudomonas fluorescens. Statistical analysis revealed that there was no significant interaction of temperature with [O 2 ]/(1 + [CO 2 ]) ratio, such that a combined temperature and gas composition ratio term was not needed in an additive Arrhenius description. the Arrhenius temperature characteristic term (μ) was found to be related to the [O 2 ]/(1 + [CO 2 ]). Growth rate coefficients of bacterial populations could be estimated by substituting a term functionally relating to [O 2 ]/(1 + [CO 2 ]) ratio for the μ coefficient in the Arrhenius expression. the mathematical descriptions were shown applicable for determining bacterial population growth rate coefficients in modified atmosphere storage for oxygen concentration from 0 to 20.99% and carbon dioxide concentration from 0.03 to 80%.