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Title: Physical mechanisms of inactivation of Bacillus subtilis spores using cold atmospheric plasmas
Authors: Deng, Xu-Tao
Shi, J.J.
Kong, Michael G.
Keywords: Atmospheric-pressure glow discharges (APGD)
Bacillus subtilis spores
Inactivation mechanisms
Issue Date: 2006
Publisher: © IEEE
Citation: DENG, X., SHI, J.J. and KONG, M.G., 2006. Physical mechanisms of inactivation of Bacillus subtilis spores using cold atmospheric plasmas. IEEE Transactions on Plasma Science, 34(4), pt. 2, pp.1310-1316.
Abstract: This paper presents a detailed study of the potential physical mechanisms of the microbial inactivation by cold atmospheric plasmas. With the Bacillus subtilis spores as a model microorganism and an atmospheric-plasma plume in helium flow, optical emission spectroscopy and inactivation kinetics are used to demonstrate the dominating role played by the reactive oxygen species (e.g., atomic oxygen and OH) as well as the minor contributions of the UV photons, heat, charged particles, and electric fields. To differentiate the concentrations of the reactive oxygen species, an atmospheric helium-oxygen plasma is also used for the spore inactivation. Results with the helium and the helium-oxygen plasmas are contrasted to highlight how the production of the spore-killing oxygen species may be enhanced.
Description: This article was published in the journal, IEEE Transactions on Plasma Science [© 2006 IEEE] and 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/TPS.2006.877739
URI: https://dspace.lboro.ac.uk/2134/5239
ISSN: 0093-3813
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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