Document Detail

Validation of a predictive model for the growth of Botrytis cinerea and Penicillium expansum on grape berries.
MedLine Citation:
PMID:  20619474     Owner:  NLM     Status:  MEDLINE    
The objective of this study was to develop and to validate a model for predicting the combined effect of temperature and a(w) on the radial growth rate, mu, of Botrytis cinerea and Penicillium expansum on grape berries. The proposed strategy was based on the gamma-concept developed previously [Zwietering, M.H., Wijtzes, T., de Wit, J.C., van't Riet, K. 1992. A decision support system for prediction of the microbial spoilage in foods. Journal of Food Protection. 12, 973-979]: mu=mu(opt).gamma(T).gamma(a(w)), where the gamma functions were cardinal models with inflection (CMI), mu(opt) the radial growth rate on grape berries. Firstly, the cardinal temperatures and a(w)'s were estimated independently from experiments carried out on Potato Dextrose Agar. Secondly, the gamma concept was validated i/ on a synthetic grape juice medium (SGJ) and ii/ on a grape juice agar (GJA). Accuracy and bias factors were closer to 1 with the latter analogue, thus suggesting that GJA should be preferred to SGJ. Thirdly, an experimental protocol taken into account the isotropic nature of fungal growth was developed for estimating mu(opt) on grape berries. This study demonstrated that CMI's can be validated on agri-food products over a wide range of temperature and a(w) using the described methodology.
Daniela Judet-Correia; Sophie Bollaert; Alison Duquenne; Claudine Charpentier; Maurice Bensoussan; Philippe Dantigny
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies     Date:  2010-06-19
Journal Detail:
Title:  International journal of food microbiology     Volume:  142     ISSN:  1879-3460     ISO Abbreviation:  Int. J. Food Microbiol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-10     Completed Date:  2010-11-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8412849     Medline TA:  Int J Food Microbiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  106-13     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Laboratoire Eau, Molécules Actives, Macromolécules, Activité, Université de Bourgogne, Dijon, France.
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MeSH Terms
Botrytis / growth & development*,  isolation & purification,  metabolism
Culture Media / metabolism
Microbiological Techniques / methods*
Models, Biological
Penicillium / growth & development*,  isolation & purification,  metabolism
Vitis / microbiology*
Reg. No./Substance:
0/Culture Media

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