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Titre :
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When is simple good enough: A comparison of the Gompertz, Baranyi, and three-phase linear models for fitting bacterial growth curves
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Auteurs :
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R. Buchanan ;
R. Whiting ;
W. Damert
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Type de document :
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article/chapitre/communication
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Année de publication :
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1997
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Format :
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p. 313-326
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Langues:
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= Anglais
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Catégories :
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Biologie
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Mots-clés:
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BACTERIE PATHOGENE
;
PRODUIT ALIMENTAIRE
;
MICROBIOLOGIE SANITAIRE
;
NITRITE
;
PH
;
MODELE MATHEMATIQUE
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Résumé :
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The use of primary mathematical models with curve fitting software is dramatically changing quantitative food microbiology. The two most widely used primary growth models are the Baranyi and Gompertz models. A three-phase linear model was developed to determine how well growth curves could be described using a simpler model. The model divides bacterial growth curves into three phases : the lag and stationary phases where the specific growth rate is zero (µ=0), and the exponential phase where the logarithm of the bacterial population increases linearly with time (µ=constant). The model has four parameters : N-0 (Log(10) of initial population density), NMAX (Log(10) of final population density), tLAG (time when lag phase ends), and tMax (time when exponential phase ends). A comparison of the linear model was made against the Baranyi and Gompertz models, using established growth data for Escherichia coil 0157:H7. The growth curves predicted by the three models showed good agreement.
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Source :
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Food microbiology, vol.14
|
