A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES
International audience Antarctic micrometeorites (AMMs) in the 100-400 m size range are the dominant mass fraction of extraterrestrial material accreted by the Earth today. A high performance liquid chromatography (HPLC) based technique exploited at the limits of sensitivity has been used to search...
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fthalin2p3:oai:HAL:in2p3-02114748v1 2024-05-12T07:56:34+00:00 A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES Brinton, Karen, L F Engrand, Cécile Glavin, Daniel, P. Bada, Jeffrey, L Maurette, Michel Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) 1998 https://hal.in2p3.fr/in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748/document https://hal.in2p3.fr/in2p3-02114748/file/Brinton_1998_aa_MMs.pdf en eng HAL CCSD Springer Verlag in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748/document https://hal.in2p3.fr/in2p3-02114748/file/Brinton_1998_aa_MMs.pdf info:eu-repo/semantics/OpenAccess ISSN: 0169-6149 EISSN: 1573-0875 Origins of Life and Evolution of Biospheres https://hal.in2p3.fr/in2p3-02114748 Origins of Life and Evolution of Biospheres, 1998 [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 1998 fthalin2p3 2024-04-17T15:46:30Z International audience Antarctic micrometeorites (AMMs) in the 100-400 m size range are the dominant mass fraction of extraterrestrial material accreted by the Earth today. A high performance liquid chromatography (HPLC) based technique exploited at the limits of sensitivity has been used to search for the extraterrestrial amino acids-aminoisobutyric acid (AIB) and isovaline in AMMs. Five samples, each containing about 30 to 35 grains, were analyzed. All the samples possess a terrestrial amino acid component, indicated by the excess of the L-enantiomers of common protein amino acids. In only one sample (A91) was AIB found to be present at a level significantly above the background blanks. The concentration of AIB (280 ppm), and the AIB/isovaline ratio (10), in this sample are both much higher than in CM chondrites. The apparently large variation in the AIB concentrations of the samples suggests that AIB may be concentrated in rare subset of micrometeorites. Because the AIB/isovaline ratio in sample A91 is much larger than in CM chondrites, the synthesis of amino acids in the micrometeorite parent bodies might have involved a different process requiring an HCN-rich environment, such as that found in comets. If the present day characteristics of the meteorite and micrometeorite fluxes can be extrapolated back in time, then the flux of large carbonaceous micrometeorites could have contributed to the inventory of prebiotic molecules on the early Earth. Article in Journal/Newspaper Antarc* Antarctic HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) Antarctic |
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Open Polar |
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HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
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fthalin2p3 |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Brinton, Karen, L F Engrand, Cécile Glavin, Daniel, P. Bada, Jeffrey, L Maurette, Michel A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Antarctic micrometeorites (AMMs) in the 100-400 m size range are the dominant mass fraction of extraterrestrial material accreted by the Earth today. A high performance liquid chromatography (HPLC) based technique exploited at the limits of sensitivity has been used to search for the extraterrestrial amino acids-aminoisobutyric acid (AIB) and isovaline in AMMs. Five samples, each containing about 30 to 35 grains, were analyzed. All the samples possess a terrestrial amino acid component, indicated by the excess of the L-enantiomers of common protein amino acids. In only one sample (A91) was AIB found to be present at a level significantly above the background blanks. The concentration of AIB (280 ppm), and the AIB/isovaline ratio (10), in this sample are both much higher than in CM chondrites. The apparently large variation in the AIB concentrations of the samples suggests that AIB may be concentrated in rare subset of micrometeorites. Because the AIB/isovaline ratio in sample A91 is much larger than in CM chondrites, the synthesis of amino acids in the micrometeorite parent bodies might have involved a different process requiring an HCN-rich environment, such as that found in comets. If the present day characteristics of the meteorite and micrometeorite fluxes can be extrapolated back in time, then the flux of large carbonaceous micrometeorites could have contributed to the inventory of prebiotic molecules on the early Earth. |
author2 |
Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM) Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Brinton, Karen, L F Engrand, Cécile Glavin, Daniel, P. Bada, Jeffrey, L Maurette, Michel |
author_facet |
Brinton, Karen, L F Engrand, Cécile Glavin, Daniel, P. Bada, Jeffrey, L Maurette, Michel |
author_sort |
Brinton, Karen, L F |
title |
A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
title_short |
A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
title_full |
A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
title_fullStr |
A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
title_full_unstemmed |
A SEARCH FOR EXTRATERRESTRIAL AMINO ACIDS IN CARBONACEOUS ANTARCTIC MICROMETEORITES |
title_sort |
search for extraterrestrial amino acids in carbonaceous antarctic micrometeorites |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.in2p3.fr/in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748/document https://hal.in2p3.fr/in2p3-02114748/file/Brinton_1998_aa_MMs.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0169-6149 EISSN: 1573-0875 Origins of Life and Evolution of Biospheres https://hal.in2p3.fr/in2p3-02114748 Origins of Life and Evolution of Biospheres, 1998 |
op_relation |
in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748 https://hal.in2p3.fr/in2p3-02114748/document https://hal.in2p3.fr/in2p3-02114748/file/Brinton_1998_aa_MMs.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1798836687567060992 |