This item still needs to be validated !
Title: The influence of temperature and gas mixtures on the growth of the intrinsic micro-organisms on cut endive: Predictive versus actual growth
Authors: Vankerschaver, K ×
Willocx, F
Smout, Chantal
Hendrickx, Marc
Tobback, Paul #
Issue Date: Jan-1996
Publisher: Academic press ltd
Series Title: Food microbiology vol:13 issue:6 pages:427-440
Abstract: Effects of temperature and carbon dioxide concentration on the growth of mesophilic aerobic count (MAC), psychrotrophic, Gram-negative bacteria, pseudomonads and lactic acid bacteria were investigated in a case-study of minimally processed endive. When plotting population density against time, a distinct lag time was not observed. In a temperature range from 4.3-16.1 degrees C, both combined Arrhenius-Ratkowsky-restricted growth models were used to model growth of these groups of micro-organisms. Temperature dependence of the growth rate constant for pseudomonads and psychrotrophic, Gramnegative bacteria were similar, whereas the growth rate constant of the MAC was much more temperature dependent. A combined exponential (CO2)-Arrhenius (temperature)-restricted growth model was selected to model the number of pseudomonads and an exponential (CO2)-Ratkowsky (temperature)-restricted growth model was selected to model the growth of MAC on cut endive. The restricted growth model was differentiated with respect to time to obtain a dynamic restricted growth model. Temperature shift-up and shift-down experiments were performed. Use of the Arrhenius equation for the temperature dependence of the growth rate constant and parameter estimates obtained under constant CO2 and temperature conditions only partially allowed us to predict the microbial evolution of minimally processed endive under dynamic conditions. Especially under temperature shift-down conditions, a systematic underestimation of growth was observed. (C) 1996 Academic Press Limited
ISSN: 0740-0020
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Food and Microbial Technology
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science