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Title: Interaction of sub-microsecond pulsed electric field with bacterial cells
Authors: Chalise, Priya R.
Perni, Stefano
Shama, Gilbert
Novac, Bucur M.
Smith, Ivor R.
Kong, Michael G.
Issue Date: 2006
Publisher: © IEEE
Citation: CHALISE, P.R......et al., 2006. Interaction of sub-microsecond pulsed electric field with bacterial cells. IN: 2006 IEEE International Power Modulator Conference, May 14-18, Washington, DC, pp. 562-565.
Abstract: In the bacterial decontamination of liquid foods, the use of a sub microsecond pulsed electric field is of significant interest because it offers advantages such as negligible thermal effects, superior energy efficiency, and a much-reduced probability of medium breakdown. The reduced pulse duration also affects the mechanism by which sub microsecond pulses inactivate bacterial cells. We provide insight into possible bacterial inactivation mechanisms by sub-microsecond electric pulse with the aid of a common bacterium-wild type Escherichia coli and its mutants. Two pulsed power sources have been designed, developed and tested-one with pulse duration of 32 ns, the other 700 ns, and both are capable of establishing sufficiently high electric field intensity. The experimental results suggest that bacterial inactivation by 700 ns pulses is due to electrical breakdown of the outer cell membrane, whereas inactivation by 32 ns pulses is possibly due to interaction with intracellular structures.
Description: This is a conference paper [© IEEE]. It is also available at: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Version: Published
DOI: 10.1109/MODSYM.2006.365313
URI: https://dspace.lboro.ac.uk/2134/5234
ISBN: 1424400198
ISSN: 1930-885X
Appears in Collections:Conference Papers and Contributions (Electronic, Electrical and Systems Engineering)

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