Bérces, A. and Egyeki, M. and Fekete, A. and Horneck, G. and Kovács, G. and Panitz, C. and Rontó, Gy. (2014) The PUR Experiment on the EXPOSE-R facility: biological dosimetry of solar extraterrestrial UV radiation. International Journal of Astrobiology, pp. 47-53. Cambridge University Press. doi: 10.1017/S1473550414000287. ISSN 1473-5504.
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Official URL: http://dx.doi.org/10.1017/S1473550414000287
Abstract
The aim of our experiment Phage and Uracil Response was to extend the use of bacteriophage T7 and uracil biological dosimeters for measuring the biologically effective ultraviolet (UV) dose in the harsh extraterrestrial radiation conditions. The biological detectors were exposed in vacuum-tightly cases in the European Space Agency (ESA) astrobiological exposure facility attached to the external platform of Zvezda (EXPOSE-R). EXPOSE-R took off to the International Space Station (ISS) in November 2008 and was installed on the External platform of the Russian module Zvezda of the ISS in March 2009. Our goal was to determine the dose–effect relation for the formation of photoproducts (i.e. damage to phage DNA and uracil, respectively). The extraterrestrial solar UV radiation ranges over the whole spectrum from vacuum-UV (λ<200 nm) to UVA (315 nm<λ<400 nm), which causes photolesions (photoproducts) in the nucleic acids/their components either by photoionization or excitation. However, these wavelengths cause not only photolesions but in a wavelength-dependent efficiency the reversion of some photolesions, too. Our biological detectors measured in situ conditions the resultant of both reactions induced by the extraterrestrial UV radiation. From this aspect the role of the photoreversion in the extension of the biological UV dosimetry are discussed.
Item URL in elib: | https://elib.dlr.de/94271/ | ||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||
Title: | The PUR Experiment on the EXPOSE-R facility: biological dosimetry of solar extraterrestrial UV radiation | ||||||||||||||||||||||||
Authors: |
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Date: | 2014 | ||||||||||||||||||||||||
Journal or Publication Title: | International Journal of Astrobiology | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||
DOI : | 10.1017/S1473550414000287 | ||||||||||||||||||||||||
Page Range: | pp. 47-53 | ||||||||||||||||||||||||
Publisher: | Cambridge University Press | ||||||||||||||||||||||||
Series Name: | CJO2014 | ||||||||||||||||||||||||
ISSN: | 1473-5504 | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | bacteriophage T7, biological UV dosimetry, EXPOSE-R, International Space Station, uracil | ||||||||||||||||||||||||
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 - Research under Space Conditions | ||||||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Strahlenbiologie (old) | ||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Aerospace Medicine > Radiation Biology | ||||||||||||||||||||||||
Deposited By: | Kopp, Kerstin | ||||||||||||||||||||||||
Deposited On: | 13 Jan 2015 14:31 | ||||||||||||||||||||||||
Last Modified: | 22 Sep 2015 10:39 |
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