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Pulsed electric field inactivation of spoilage microorganisms in alcoholic beverages

Beveridge, J.R. and Wall, K.A. and MacGregor, S.J. and Anderson, J.G. and Rowan, N. (2004) Pulsed electric field inactivation of spoilage microorganisms in alcoholic beverages. Proceedings of the IEEE, 92 (7). pp. 1138-1143. ISSN 0018-9219

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Abstract

In recent years, a number of new applications have emerged where pulsed power is being used in the treatment of waste and effluent, foodstuffs and beverages. One of these emerging applications is pulsed electric field (PEF) inactivation of microorganisms in liquid media. This involves the generation of electric fields of the order of 30 kV/cm across liquids contaminated with microorganisms. This induces a relatively large transmembrane potential that can lead to irreversible electroporation and consequently cell lysis. The nature of the PEF pulse profile is the subject of extensive study, and it has been reported that bipolar square waves provide superior inactivation when compared to monopolar pulses. A previous study, however, has challenged this view, and results will be presented demonstrating that more effective inactivation of bacteria can be achieved using the monopolar pulse. Results will also be given on the effect of monopolar pulse PEF applied to alcoholic beverages containing known spoilage microorganisms. This will highlight an apparent synergistic inactivation effect when microorganisms in alcoholic beverages are exposed to PEF.

Item type: Article
ID code: 3493
Keywords: electric field, pulsed electric field, alcohol, microorganisms, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences > Bioscience
Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
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Depositing user: Strathprints Administrator
Date Deposited: 04 Jul 2007
Last modified: 16 Jul 2013 18:23
URI: http://strathprints.strath.ac.uk/id/eprint/3493

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