Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 83: Issue 1
DSC Analysis of foodborne bacteria
Authors:
M. Tunick U.S. Department of Agriculture Dairy Processing and Products Research Unit, Eastern Regional Research Center, Agricultural Research Service Wyndmoor USA PA 19038 600 E. Mermaid Lane Wyndmoor USA PA 19038 600 E. Mermaid Lane

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D. Bayles U.S. Department of Agriculture Dairy Processing and Products Research Unit, Eastern Regional Research Center, Agricultural Research Service Wyndmoor USA PA 19038 600 E. Mermaid Lane Wyndmoor USA PA 19038 600 E. Mermaid Lane

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J. Novak U.S. Department of Agriculture Dairy Processing and Products Research Unit, Eastern Regional Research Center, Agricultural Research Service Wyndmoor USA PA 19038 600 E. Mermaid Lane Wyndmoor USA PA 19038 600 E. Mermaid Lane

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Pages:
23–26
Online Publication Date:
10 Mar 2006
Publication Date:
08 Jan 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-7042-8
Keywords:
bacteria; Clostridium; differential scanning calorimetry; Listeria; ribosomes
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Abstract  

Differential scanning calorimetry (DSC) is applicable to studying the thermal properties of bacteria when treated with heat, cold, or antibiotics. Foodborne pathogens are inactivated by heat, and denaturation transitions observed by DSC indicate potential sites of cellular injury. Ribosomes, which are the sites for messenger RNA translation, are one critical component of thermal damage as evidenced by characteristic denaturation transitions in the 66-74C range. These transitions disappear when cells of Clostridium perfringens are subjected to heat, suggesting structural or conformational changes to ribosomal proteins, and when cells of Listeria monocytogenes are cold-shocked by refrigeration, indicating ribosomal dissociation. DSC can be used to show that refrigeration followed by heat treatment improves the killing of dangerous microorganisms.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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