NDLI: Electrical environment surrounding microbes exposed to pulsed electric fields

Content Provider	IEEE Xplore Digital Library
Author	Bruhn, R.E. Pedrow, P.D. Olsen, R.G. Barbosa-Canovas, G.V. Swanson, B.G.
Copyright Year	1994
Abstract	Inactivation of microbes by the application of intense pulsed electric fields (/spl sime/10 to 40 kV/cm) could result in low-temperature pasteurization of liquid foods. Advantages over conventional heat pasteurization include longer shelf-life, better flavor, and less enzyme damage. Numerical modeling of electrical parameters near the microbe during exposure to these intense electric fields is described. The continuity equation describes movement of positive and negative ions while Gauss's law yields the electric field after movement of the ions. One negative ionic species and one positive ionic species are assumed to be in the suspension fluid and protoplasm of the microbe. The microbe membrane is modeled as a nonconducting dielectric. With application of unidirectional electric fields, free volume and free surface charge densities form along the membrane. Comparison is made with a uniform conductivity model and it is shown that significant differences exist in parameters such as ion concentration, free surface charge density, free volume charge density, heat sources due to conduction current, and ionic injection at membrane surfaces.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	806
Ending Page	812
Page Count	7
File Size	747805
File Format	PDF
ISSN	10709878
Volume Number	4
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Biomembranes Biological system modeling Conductivity Surface treatment Voltage Dairy products Electrodes Dielectric liquids Computer science Biological systems
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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