| Survivability of biomolecules during extraterrestrial delivery: new results on pyrolysis of amino acids and poly-amino acids. | |
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MedLine Citation:
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PMID: 11605637 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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The hypothesis on exogenous origin of organic matter on the early Earth is strongly supported by the detection of a large variety of organic compounds (including amino acids and nucleobases) in carbonaceous chondrites. Whether such complex species can be successively delivered by other space bodies (comets, asteroids and interplanetary dust particles) is unclear and depends primarily on capability of the biomolecules to survive high temperatures during atmospheric deceleration and impacts to the terrestrial surface. Recent simulation experiments on amino acid and nucleic acid base pyrolysis under oxygen-free atmosphere demonstrated that simple representatives of these (considered thermally unstable) compounds can survive at 1-10% level a rapid heating at 500-600 degrees C. In the present work, we report on new data on the pyrolysis of amino acids and their homopolymers and discuss implications of their thermal behavior for extraterrestrial delivery. |
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Authors:
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V A Basiuk; J Douda |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Advances in space research : the official journal of the Committee on Space Research (COSPAR) Volume: 27 ISSN: 0273-1177 ISO Abbreviation: Adv Space Res Publication Date: 2001 |
Date Detail:
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Created Date: 2001-10-17 Completed Date: 2001-10-25 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9878935 Medline TA: Adv Space Res Country: United States |
Other Details:
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Languages: eng Pagination: 231-6 Citation Subset: S |
Copyright Information:
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c 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved. |
Affiliation:
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Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Circuito Exterior C.U., A. Postal 70-543, 04510 Mexico D.F., Mexico. basiuk@nuclecu.unam.mx |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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chemistry* Extraterrestrial Environment Gels / chemistry Glutamic Acid / chemistry Hot Temperature* Leucine / chemistry Meteoroids Phenylalanine / chemistry Piperazines / chemical synthesis* Proline / chemistry Pyrrolidonecarboxylic Acid / chemical synthesis* Silicon Dioxide / chemistry Valine / chemistry beta-Alanine / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Gels; 0/Piperazines; 107-95-9/beta-Alanine; 147-85-3/Proline; 56-86-0/Glutamic Acid; 60650-90-0/silochrome; 61-90-5/Leucine; 63-91-2/Phenylalanine; 7004-03-7/Valine; 7631-86-9/Silicon Dioxide; 98-79-3/Pyrrolidonecarboxylic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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