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Applied and Environmental Microbiology, August 2002, p. 4162-4167, Vol. 68, No. 8
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.8.4162-4167.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Accelerated Death Kinetics of Aspergillus niger Spores under High-Pressure Carbonation

M. Shimoda,1* H. Kago,1 N. Kojima,1 M. Miyake,2 Y. Osajima,3 and I. Hayakawa1

Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka,1 Shimodzu Co., Kyoto,2 School of Bioresources, Hiroshima Prefectural University, Hiroshima, Japan3

Received 17 December 2001/ Accepted 30 May 2002

The death kinetics of Aspergillus niger spores under high-pressure carbonation were investigated with respect to the concentration of dissolved CO2 (dCO2) and treatment temperature. All of the inactivation followed first-order death kinetics. The D value (decimal reduction time, or the time required for a 1-log-cycle reduction in the microbial population) in the saline carbonated at 10 MPa was 0.16 min at 52°C. The log D values were linearly related to the treatment temperature and the concentration of dCO2, but a significant interaction was observed between them.

* Corresponding author. Mailing address: Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. Phone: 81-92-642-3016. Fax: 81-92-642-3030. E-mail: mshimoda{at}agr.kyushu-u.ac.jp.

Applied and Environmental Microbiology, August 2002, p. 4162-4167, Vol. 68, No. 8
0099-2240/02/$04.00+0     DOI: 10.1128/AEM.68.8.4162-4167.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.





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Copyright © 2002 by the American Society for Microbiology. All rights reserved.