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Inactivation of B. subtilis spores by low pressure plasma—influence of optical filters and photon/particle fluxes on the inactivation efficiency

Fiebrandt, Marcel and Hillebrand, Bastian and Lackmann, Jan-Wilm and Raguse, Marina and Moeller, Ralf and Awakowicz, Peter and Stapelmann, Katharina (2018) Inactivation of B. subtilis spores by low pressure plasma—influence of optical filters and photon/particle fluxes on the inactivation efficiency. Journal of Physics D: Applied Physics, 51 (4), 045401. Institute of Physics (IOP) Publishing. DOI: 10.1088/1361-6463/aa9f0a ISSN 0022-3727

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Official URL: http://dx.doi.org/10.1088/1361-6463/aa9f0a

Abstract

Inactivation experiments were performed with Bacillus subtilis spores in a low pressure double inductively coupled plasma (DICP) system. Argon, nitrogen and oxygen at 5 Pa were used as feed gas to change the emission spectrum in the range of 100 nm to 400 nm, as well as between radical and metastable densities. Optical filters were applied, to block particles and selected wavelengths from the spores. By determining absolute photon fluxes, the sporicidal efficiency of various wavelength ranges was evaluated. The results showed good agreement with other plasma experiments, as well as with monochromatic light inactivation experiments from a synchrotron. The findings indicated that the inactivation rate constants of broadband plasma emission and monochromatic light were identical, and that no synergistic effect exists. Furthermore, the influence of radicals, ions and metastables on the inactivation efficiency was of minor importance in the set-up used, and radiation was the main reason for spore inactivation.

Item URL in elib:https://elib.dlr.de/118345/
Document Type:Article
Title:Inactivation of B. subtilis spores by low pressure plasma—influence of optical filters and photon/particle fluxes on the inactivation efficiency
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fiebrandt, MarcelRuhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Bochum, Germanyhttps://orcid.org/0000-0002-9877-3778
Hillebrand, BastianRuhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Bochum, Germany; Ruhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Biomedical Applications of Plasma Technology, Bochum, GermanyUNSPECIFIED
Lackmann, Jan-WilmRuhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Bochum, Germany; Ruhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Biomedical Applications of Plasma Technology, Bochum, GermanyUNSPECIFIED
Raguse, MarinaRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Moeller, RalfRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; ralf.moeller (at) dlr.dehttps://orcid.org/0000-0002-2371-0676
Awakowicz, PeterRuhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Bochum, GermanyUNSPECIFIED
Stapelmann, KatharinaRuhr-University Bochum, Institute of Electrical Engineering and Plasma Technology, Biomedical Applications of Plasma Technology, Bochum, Germany; Department of Nuclear Engineering, North Carolina State University, Raleigh, NC, 27695, USAhttps://orcid.org/0000-0002-2116-2661
Date:5 January 2018
Journal or Publication Title:Journal of Physics D: Applied Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:51
DOI :10.1088/1361-6463/aa9f0a
Page Range:045401
Publisher:Institute of Physics (IOP) Publishing
ISSN:0022-3727
Status:Published
Keywords:Inactivation, Bacillus subtilis, low pressure plasma
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:12 Mar 2018 12:08
Last Modified:12 Mar 2018 12:08

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