Radiation-induced reactions of amino acids adsorbed on solid surfaces

Kranksith, L. López-Esquivel; Negrón‐Mendoza, A.; Mosqueira, F. G.; Ramos-Bernal, S.

doi:10.1016/j.nima.2009.11.080

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Conversely, other experiments of gamma irradiation of amino acids adsorbed on clay showed a low yield of recovery for tryptophan, aspartic acid, and glutamic acid by using the same source of gamma rays, and radiation doses two orders of magnitude smaller, but doubling the dose rate [217]. Montmorillonite ((Na,Ca) 0.3 (Al,Mg) 2 Si 4 O 10 (OH) 2 ·n(H 2 O)) demonstrated some protection behavior against molecular decomposition with respect to the case of the pure amino acids in aqueous solutions, but not at a high extent.…”

Section: Preservation Of Biosignaturesmentioning

confidence: 99%

Catalytic/Protective Properties of Martian Minerals and Implications for Possible Origin of Life on Mars

Fornaro

Steele

Brucato

2018

Life

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Minerals might have played critical roles for the origin and evolution of possible life forms on Mars. The study of the interactions between the “building blocks of life” and minerals relevant to Mars mineralogy under conditions mimicking the harsh Martian environment may provide key insight into possible prebiotic processes. Therefore, this contribution aims at reviewing the most important investigations carried out so far about the catalytic/protective properties of Martian minerals toward molecular biosignatures under Martian-like conditions. Overall, 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. Such a complexity requires more efforts in simulating realistically the Martian environment in order to better inspect plausible prebiotic pathways and shed light on the nature of the organic compounds detected both in meteorites and on the surface of Mars through in situ analysis.

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Section: Preservation Of Biosignaturesmentioning

confidence: 99%

Catalytic/Protective Properties of Martian Minerals and Implications for Possible Origin of Life on Mars

Fornaro

Steele

Brucato

2018

Life

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“…Their behavior is strongly dependent on both the nature of the molecule and on the mineral. Lopez-Esquivel et al studied the adsorption of some amino acids into Namontmorillonite and exposed the system to gamma-rays [35]. Their findings showed that adsorbed molecules are protected from radiation.…”

Section: Minerals and Radiation Chemistrymentioning

confidence: 99%

Chemical Evolution: An Approach From Radiation Chemistry

Negrón‐Mendoza¹,

Ramos-Bernal²,

Colín-García³

et al. 2016

RadJ

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Abstract. To explain the origin of life on Earth, a period in which the synthesis of bio-organic compounds was carried out from simple inorganic molecules under the influence of natural energy sources is assumed. However, many prebiotic reactions require the input of energy. Ionizing radiation is a very efficient source of energy and may have participated in prebiotic synthesis due to its unique qualities-e.g., its ubiquity, its energy deposition method, and the effectiveness of its reactions, via free radicals. The use of this source is substantiated by calculations of the energy available from the decay of radioactive elements with long half-lives. Cosmic radiation is an external energy source that also could have contributed to chemical evolution processes, especially in extraterrestrial environments. In the context of chemical evolution, radiation chemistry can be a very precise and useful tool to simulate the changes that take place in organic molecules that are exposed to high-energy radiation. This work highlights the importance of ionizing radiation in prebiotic synthesis, in both water and frozen solutions, which reproduces both terrestrial and extraterrestrial environments.

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“…188 Very low recovery of amino acids was obtained after adsorption to clay minerals and irradiation with a 60 Co gamma ray source. 189 Transition metal-containing mineral surfaces may also be capable of photocatalytic degradation of organics, because of the presence of reactive oxygen species generated on the mineral surfaces by Fenton-like reactions. For example, adenine is readily oxidized on pyrite surfaces by peroxides generated from reaction of surface ferrous iron with water, 190 and copper-containing clay minerals increase the degradation rates of adenine and adenosine.…”

Section: Mineral-organic Interactions Of Potential Relevance To the O...mentioning

confidence: 99%

Mineral–organic interfacial processes: potential roles in the origins of life

et al. 2012

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Life is believed to have originated on Earth B4.4-3.5 Ga ago, via processes in which organic compounds supplied by the environment self-organized, in some geochemical environmental niches, into systems capable of replication with hereditary mutation. This process is generally supposed to have occurred in an aqueous environment and, likely, in the presence of minerals. Mineral surfaces present rich opportunities for heterogeneous catalysis and concentration which may have significantly altered and directed the process of prebiotic organic complexification leading to life. We review here general concepts in prebiotic mineral-organic interfacial processes, as well as recent advances in the study of mineral surface-organic interactions of potential relevance to understanding the origin of life.

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Radiation-induced reactions of amino acids adsorbed on solid surfaces

Cited by 10 publications

References 11 publications

Catalytic/Protective Properties of Martian Minerals and Implications for Possible Origin of Life on Mars

Catalytic/Protective Properties of Martian Minerals and Implications for Possible Origin of Life on Mars

Chemical Evolution: An Approach From Radiation Chemistry

Mineral–organic interfacial processes: potential roles in the origins of life

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