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

@article{Ertem2016ShieldingBF,
  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},
  year={2016},
  volume={16},
  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
Abstract Organic compounds have been delivered to the surface of Mars via meteorites, comets and interplanetary dust particles for billions of years. Determining the effects of high energy radiation
UV irradiation of biomarkers adsorbed on minerals under Martian-like conditions: Hints for life detection on Mars
Abstract Laboratory simulations of Martian conditions are essential to develop quantitative models for the survival of organic biomarkers for future Mars exploration missions. In this work, we report
Constraining the preservation of organic compounds in Mars analog nontronites after exposure to acid and alkaline fluids
TLDR
It is demonstrated that smectite previously exposed to fluids with different pH values influences how glycine is adsorbed into their interlayer regions, affecting their potential for preservation of organic compounds under contemporary Mars surface conditions.
Catalytic/Protective Properties of Martian Minerals and Implications for Possible Origin of Life on Mars
TLDR
It turns out that the fate of molecular biosignatures on Mars depends on a delicate balance between multiple preservation and degradation mechanisms, often regulated by minerals, which may take place simultaneously.
1 Catalytic / Protective Properties of Martian Minerals 2 and Implications for Possible Origin of Life on Mars 3
Minerals might have played critical roles for the origin and evolution of possible life forms 10 on Mars. The study of the interactions between “building blocks of life” and minerals relevant to 11
Detection of nucleotides adsorbed onto clay by UV resonant raman spectroscopy: A step towards the search for biosignatures on Mars
Abstract The payload of Mars 2020 space mission includes a deep UV resonance Raman and fluorescence spectrometer SHERLOC dedicated to the detection of luminescence and Raman signal of condensed
Role of Mineral Surfaces in Prebiotic Processes and Space-Like Conditions
The study of the interactions between organic molecules and minerals is fundamental to unravel the prebiotic processes that led to the emergence of life on Earth or possibly on other planets. Mineral
Carotenoid Raman Signatures are Better Preserved in Dried Cells of the Desert Cyanobacterium Chroococcidiopsis than in Hydrated Counterparts after High-Dose Gamma Irradiation
TLDR
It is shown here that desiccation can protect carotenoid Raman signatures in the desert cyanobacterium Chroococcidiopsis sp.
Halophilic responses to a range of salts and their relevance to Mars
This Thesis investigated the survival of salt-tolerant microorganisms in environments where salts other than NaCl are present, with the aim being to shed new light on the martian astrobiological
Mineral-Organic Interactions in Prebiotic Synthesis
A common criticism of “prebiotic chemistry research” is that it is done with starting materials that are too pure, in experiments that are too directed, to get results that are too scripted, under
...
1
2
...

References

SHOWING 1-10 OF 50 REFERENCES
Amino acid photostability on the Martian surface
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
Perchlorate radiolysis on Mars and the origin of martian soil reactivity.
TLDR
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
TLDR
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.
Anoxic photochemical oxidation of siderite generates molecular hydrogen and iron oxides
TLDR
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.
Catalytic peptide hydrolysis by mineral surface: Implications for prebiotic chemistry
Abstract The abiotic polymerization of amino acids may have been important for the origin of life, as peptides may have been components of the first self-replicating systems. Though amino acid
Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars
TLDR
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.
TLDR
Results demonstrate that catalytic activity of montMorillonites with lower charge density is superior to that of higher charge density montmorillonite.
High molecular weight organic matter in martian meteorites
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,
Presidential Address to the Mineralogical Society of America, Salt Lake City, October 18, 2005: Mineral surfaces and the prebiotic selection and organization of biomolecules
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,
...
1
2
3
4
5
...