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Cold atmospheric plasma analysis for inactivation of bacterial endospores

Müller, Meike and Zimmermann, Julia L. and Morfill, Gregor E. and Rettberg, P. and Thomas, Hubertus M. (2019) Cold atmospheric plasma analysis for inactivation of bacterial endospores. DPG-Frühjahrstagung, 17. März - 22. März 2019, München, Deutschland. (Unpublished)

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In space research extra-terrestrial bodies have to be protected from possible contaminations by terrestrial microorganisms. A newly developed plasma afterglow circulation apparatus is presented as a useful sterilization method for spacecraft equipment. The apparatus uses a surface micro-discharge (SMD) to create cold atmospheric plasma (CAP) and operates with ambient air and a relative humidity up to ~ 90 %. Microbiological investigations were executed to test the inactivation efficiency of the apparatus for different treatment volumes. Contact angle and XPS measurements were performed with different materials to test the material compatibility of the plasma treatment. In addition, the composition of the afterglow was analyzed for different humidity conditions and plasma parameters using Fourier Transformation Infrared (FTIR) and UV spectroscopy. The study improves the understanding of the processes which are involved in the inactivation of microorganisms and in the composition of the afterglow plasma. We will give an overview on the status of the plasma decontamination project funded by the Bavarian Ministry of Economics.

Item URL in elib:https://elib.dlr.de/128738/
Document Type:Conference or Workshop Item (Speech)
Title:Cold atmospheric plasma analysis for inactivation of bacterial endospores
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Müller, MeikeMeike.Mueller (at) dlr.deUNSPECIFIED
Zimmermann, Julia L.terraplasma GmbH, Lichtenbergstraße, 85748 Garching bei München, GermanyUNSPECIFIED
Morfill, Gregor E.terraplasma GmbH, Lichtenbergstraße, 85748 Garching bei München, GermanyUNSPECIFIED
Rettberg, P.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany; petra.rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Thomas, Hubertus M.Hubertus.Thomas (at) dlr.dehttps://orcid.org/0000-0001-8358-2023
Date:March 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:CAP, Sterilisation, Endospores, Planetary Protection
Event Title:DPG-Frühjahrstagung
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:17. März - 22. März 2019
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 - Komplexe Plasmen / Laboratory research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Institute of Aerospace Medicine
Deposited By: Müller, Meike
Deposited On:12 Aug 2019 07:42
Last Modified:12 Aug 2019 07:42

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