Document Detail

Effect of heat activation and inactivation conditions on germination and thermal resistance parameters of Bacillus cereus spores.
MedLine Citation:
PMID:  11246909     Owner:  NLM     Status:  MEDLINE    
The effect of isothermal and non-isothermal heat activation on germination and thermoresistance of two strains of Bacillus cereus spores was studied. Results indicated that the germination after isothermal activation was lower than after non-isothermal heating. The activation rate affected the z value, which increased with faster heating rates. For each temperature and inactivation rate, the non-isothermal activation at rate of 2 degrees C/min resulted in larger D values (D90 = 4.70 min) than isothermal activation (D90 = 4.04 min). The two mathematical equations used to analyse non-isothermal data produced similar predicted D and z values, nevertheless the Hayakawa equation modified in this work for non-linear regression analysis, requires less computational effort.
A Fernández; M J Ocio; P S Fernández; A Martínez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of food microbiology     Volume:  63     ISSN:  0168-1605     ISO Abbreviation:  Int. J. Food Microbiol.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-03-14     Completed Date:  2001-05-17     Revised Date:  2012-01-17    
Medline Journal Info:
Nlm Unique ID:  8412849     Medline TA:  Int J Food Microbiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  257-64     Citation Subset:  IM    
Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Burjassot, Valencia, Spain.
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MeSH Terms
Bacillus cereus / physiology*
Colony Count, Microbial
Hot Temperature*
Models, Biological
Spores, Bacterial / physiology
Time Factors

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