elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

The PUR Experiment on the EXPOSE-R facility: biological dosimetry of solar extraterrestrial UV radiation

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

Full text not available from this repository.

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/
Document Type:Article
Title:The PUR Experiment on the EXPOSE-R facility: biological dosimetry of solar extraterrestrial UV radiation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bérces, A.Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary; attila.berces (at) med.semmelweis-univ.huUNSPECIFIED
Egyeki, M.Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, HungaryUNSPECIFIED
Fekete, A.Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, HungaryUNSPECIFIED
Horneck, G.German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Division, Cologne, GermanyUNSPECIFIED
Kovács, G.Hungarian Defence Forces Medical Centre, Institute for Special Military Medicine and CBRN Defence, Budapest, HungaryUNSPECIFIED
Panitz, C.German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Division, Cologne, GermanyUNSPECIFIED
Rontó, Gy.Research Group for Biophysics, Hungarian Academy of Sciences, Budapest, HungaryUNSPECIFIED
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 - 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:13 Jan 2015 14:31
Last Modified:22 Sep 2015 10:39

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.