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Water retention of selected microorganisms and Martian soil simulants under close to Martian environmental conditions

Jänchen, J. and Bauermeister, Anja and Feyh, N. and de Vera, Jean Pierre Paul and Rettberg, Petra and Flemming, H.-C. and Szewzyk, U. (2014) Water retention of selected microorganisms and Martian soil simulants under close to Martian environmental conditions. Planetary and Space Science, 98, pp. 163-168. Elsevier. DOI: 10.1016/j.pss.2013.06.011 ISSN 0032-0633 (In Press)

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Official URL: http://www.sciencedirect.com/science/article/pii/S0032063313001529

Abstract

Based on the latest knowledge about microorganisms resistant towards extreme conditions on Earth and results of new complex models on the development of the Martian atmosphere we quantitatively examined the water-bearing properties of selected extremophiles and simulated Martian regolith components and their interaction with water vapor under close to Martian environmental conditions. Three different species of microorganisms have been chosen and prepared for our study: Deinococcus geothermalis, Leptothrix sp. OT_B_406, and Xanthoria elegans. Further, two mineral mixtures representing the early and the late Martian surface as well as montmorillonite as a single component of phyllosilicatic minerals, typical for the Noachian period on Mars, were selected. The thermal mass loss of the minerals and bacteria-samples was measured by thermoanalysis. The hydration and dehydration properties were determined under close to Martian environmental conditions by sorption isotherm measurements using a McBain-Bakr quartz spring balance. It was possible to determine the total water content of the materials as well as the reversibly bound water fraction as function of the atmospheres humidity by means of these methods. Our results are important for the evaluation of future space mission outcomes including astrobiological aspects and can support the modeling of the atmosphere/surface interaction by showing the influence on the water inventory of the upper most layer of the Martian surface.

Item URL in elib:https://elib.dlr.de/83652/
Document Type:Article
Title:Water retention of selected microorganisms and Martian soil simulants under close to Martian environmental conditions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jänchen, J.TH Wildau, Technical University of Applied Sciences, Wildau, GermanyUNSPECIFIED
Bauermeister, AnjaRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Feyh, N.Institut für Umwelttechnologie, TU BerlinUNSPECIFIED
de Vera, Jean Pierre Pauljean-pierre.devera (at) dlr.deUNSPECIFIED
Rettberg, PetraPetra.Rettberg (at) dlr.dehttps://orcid.org/0000-0003-4439-2395
Flemming, H.-C.University of Duisburg-Essen, Biofilm Centre, Geibelstraße 41, 47057 Duisburg, GermanyUNSPECIFIED
Szewzyk, U.Institut für Umwelttechnologie, TU BerlinUNSPECIFIED
Date:2014
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:98
DOI :10.1016/j.pss.2013.06.011
Page Range:pp. 163-168
Publisher:Elsevier
ISSN:0032-0633
Status:In Press
Keywords:Mars; Micoorganism; Mineral; Water sorption isotherms; Thermogravimetry
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof , Köln-Porz
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Institute of Aerospace Medicine > Radiation Biology
Deposited By: de Vera, Dr. Jean Pierre Paul
Deposited On:15 Nov 2013 12:44
Last Modified:01 Dec 2018 19:49

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