Shielding biomolecules from effects of radiation by Mars analogue minerals and soils

  title={Shielding biomolecules from effects of radiation by Mars analogue minerals and soils},
  author={G{\"o}zen Ertem and Merve Ertem and Christopher P. McKay and Robert M. Hazen},
  journal={International Journal of Astrobiology},
  pages={280 - 285}
Abstract Organic compounds have been delivered over time to Mars via meteorites, comets and interplanetary dust particles. The fate of organic material on the surface of Mars must be affected by the Martian environment, in particular by ultraviolet (UV) and other ionizing radiation. Penetration depth of UV radiation into soils is in the sub-millimetre to millimetre range and depends on the properties of the soil. The aim of this research is to study the possible protective role of Martian… 
Evidence for the protection of N-heterocycles from gamma radiation by Mars analogue minerals
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Constraining the preservation of organic compounds in Mars analog nontronites after exposure to acid and alkaline fluids
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1 Catalytic / Protective Properties of Martian Minerals 2 and Implications for Possible Origin of Life on Mars 3
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Carotenoid Raman Signatures are Better Preserved in Dried Cells of the Desert Cyanobacterium Chroococcidiopsis than in Hydrated Counterparts after High-Dose Gamma Irradiation
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In the framework of international planetary exploration programs, several space missions are planned to search for organics and bio-signatures on Mars. Previous attempts have not detected any organic
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It is concluded that neither hydrogen peroxide nor superoxide is required to explain the results of the Viking biology experiments, and calcium perchlorate exposed to gamma rays decomposes in a CO2 atmosphere to form hypochlorite, trapped oxygen, and chlorine dioxide.
Ultraviolet-radiation-induced methane emissions from meteorites and the Martian atmosphere
Ultraviolet-radiation-induced methane formation from meteorites could explain a substantial fraction of the most recently estimated atmospheric methane mixing ratios and stable hydrogen isotope analysis unambiguously confirms that the methane released from Murchison is of extraterrestrial origin.
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It is proposed that the photochemistry of Earth-abundant minerals with wide band gaps would have potentially played a critical role in shaping the biogeochemical evolution of early Earth.
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Chlorinated hydrocarbons identified in the Sheepbed mudstone by SAM are the reaction products of Martian chlorine and organic carbon derived from Martian sources or exogenous sources such as meteorites, comets, or interplanetary dust particles.
Rapid inactivation of seven Bacillus spp. under simulated Mars UV irradiation
Seven Bacillus spp. were exposed to simulations of Mars-normal UV fluence rates in order to study the effects of UV irradiation on microbial survival. A UV illumination system was calibrated to
Correlation between the extent of catalytic activity and charge density of montmorillonites.
Results demonstrate that catalytic activity of montMorillonites with lower charge density is superior to that of higher charge density montmorillonite.
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We have performed an investigation to detect high molecular weight organic matter in martian meteorites. Solvent-extracted samples of two Antarctic 5nds (ALH 84001, sub-sample 106 and EET A79001,
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Abstract One of the most enigmatic steps in Earth.s ancient transition from a lifeless planet to a living world was the process or processes by which prebiotic organic molecules were selected,