| Effects of electroconductive heat treatment and electrical pretreatment on thermal death kinetics of selected microorganisms. | |
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MedLine Citation:
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PMID: 18600935 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Suspensions of yeast cell (zygo Saccharomyces bailii) in a phosphate buffer solution were subjected to conventional (hot water) and ohmic (electric current) heating under identical temperature histories. Experiments were also conducted with cells of Escherichia coli to compare the lethal effect of combination of sublethal electrical preteatment and conventional heating with conventional heating. The kinetic parameters (D,Z,K and E(a)) were determined for both organisms during different treatments. There was no significant difference in the death rate of yeast cells during conventional and ohmic heating at the voltage range used in this study. Results of electrical pretreatment and conventional heating on E. coli indicated differences under certain conditions when compared with pure conventional heating. Thus it is concluded that microbial death during ohmic heating was due primarily to thermal effects with no significant effect of electric current per se. Sublethal electrical pretreatment appears to offer potential for increased bacterial inactivation in certain cases. |
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Authors:
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S Palaniappan; S K Sastry; E R Richter |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biotechnology and bioengineering Volume: 39 ISSN: 0006-3592 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 1992 Jan |
Date Detail:
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Created Date: 2008-07-08 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: United States |
Other Details:
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Languages: eng Pagination: 225-32 Citation Subset: - |
Affiliation:
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Department of Agricultural Engineering, Ohio State University, Columbus, Ohio 43210. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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