EFFECT OF PH OF THE RECOVERY MEDIUM ON THE APPARENT HEAT-RESISTANCE OF 3 STRAINS OF BACILLUS-CEREUS

Authors
GONZALEZ I LOPEZ M MAZAS M BERNARDO A MARTIN R
Citation
I. Gonzalez et al., EFFECT OF PH OF THE RECOVERY MEDIUM ON THE APPARENT HEAT-RESISTANCE OF 3 STRAINS OF BACILLUS-CEREUS, International journal of food microbiology, 31(1-3), 1996, pp. 341-347
Citations number
20
Categorie Soggetti
Food Science & Tenology",Microbiology
Journal title
International journal of food microbiology → ACNP
ISSN journal
01681605
Volume
31
Issue
1-3
Year of publication
1996
Pages
341 - 347
Database
ISI
SICI code
0168-1605(1996)31:1-3<341:EOPOTR>2.0.ZU;2-D
Abstract
The influence of pH of the recovery medium, in the range 7.6-5.4, on t he apparent heat resistance of three strains of Bacillus cer eus (ATCC 4342, 7004 and 9818) has been investigated. The highest counts of hea t-injured spores were obtained at pH near neutral, decreasing markedly as pH was reduced, especially with longer heating times. When the med ia were acidified, the apparent D-values tended to decrease, although some exceptions related to the strain and the nature of the medium wer e observed. z-Values determined were not affected by the pH of the med ium.