Uracil dosimeter in simulated extraterrestrial condition

A. Bérces, G. Kovács, T. Kerékgyártó, G. Rontó, H. Lammer, G. Kargl, N. I. Kömle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A polycrystalline uracil thin layer detector has been developed for UV dosimetry on the Earth's surface in the Laboratory. Exponential response of the uracil polycrystal has been detected both by absorption spectroscopy and measurements of the refractive index under the influence of terrestrial solar radiation or using UV-C sources [1, 2]. In UV biological dosimetry the UV dose scale is additive starting at a value of zero according to the definition of CIE (Technical Report TC-6-18). The biological dose can be defined by a measured end-effect. In our dosimeter exposed to natural (terrestrial) UV radiation the proportion of pyrimidin photoproducts among the total photoproducts is smaller than 0.1 and the linear correlation between the biological and physical dose is higher than 0.9 [3].According to the experimental data this linear relationship is often not valid. We observed that UV radiation did not only induce dimerisation but shorter wavelengths caused monomerisation of pyrimidin dimers. Performing the irradiation in oxygen free environment and using a deuterium lamp as UV source, we could increase monomerisation against dimerisation thus the DNA-based dosimetry's additivity rule is not fulfilled in these conditions. In this study we will demonstrate those non-linear experiments which constitute the basis of our biological experiments on the International Space Station.

Original languageEnglish
Title of host publicationEuropean Space Agency, (Special Publication) ESA SP
EditorsH. Lacoste
Pages431-432
Number of pages2
Edition518
Publication statusPublished - Sep 2002
EventProceedings of the Second European Workshop on Exo-Astrobiology - Graz, Austria
Duration: Sep 16 2002Sep 19 2002

Other

OtherProceedings of the Second European Workshop on Exo-Astrobiology
CountryAustria
CityGraz
Period9/16/029/19/02

Fingerprint

Dosimeters
Dosimetry
Dimerization
Ultraviolet radiation
Polycrystals
Space stations
Deuterium
Solar radiation
Absorption spectroscopy
Electric lamps
Dimers
Refractive index
DNA
Earth (planet)
Experiments
Irradiation
Detectors
Wavelength
Oxygen

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Bérces, A., Kovács, G., Kerékgyártó, T., Rontó, G., Lammer, H., Kargl, G., & Kömle, N. I. (2002). Uracil dosimeter in simulated extraterrestrial condition. In H. Lacoste (Ed.), European Space Agency, (Special Publication) ESA SP (518 ed., pp. 431-432)

Uracil dosimeter in simulated extraterrestrial condition. / Bérces, A.; Kovács, G.; Kerékgyártó, T.; Rontó, G.; Lammer, H.; Kargl, G.; Kömle, N. I.

European Space Agency, (Special Publication) ESA SP. ed. / H. Lacoste. 518. ed. 2002. p. 431-432.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bérces, A, Kovács, G, Kerékgyártó, T, Rontó, G, Lammer, H, Kargl, G & Kömle, NI 2002, Uracil dosimeter in simulated extraterrestrial condition. in H Lacoste (ed.), European Space Agency, (Special Publication) ESA SP. 518 edn, pp. 431-432, Proceedings of the Second European Workshop on Exo-Astrobiology, Graz, Austria, 9/16/02.
Bérces A, Kovács G, Kerékgyártó T, Rontó G, Lammer H, Kargl G et al. Uracil dosimeter in simulated extraterrestrial condition. In Lacoste H, editor, European Space Agency, (Special Publication) ESA SP. 518 ed. 2002. p. 431-432
Bérces, A. ; Kovács, G. ; Kerékgyártó, T. ; Rontó, G. ; Lammer, H. ; Kargl, G. ; Kömle, N. I. / Uracil dosimeter in simulated extraterrestrial condition. European Space Agency, (Special Publication) ESA SP. editor / H. Lacoste. 518. ed. 2002. pp. 431-432
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