Počet záznamů: 1
High-energy chemistry of formamide: A unified mechanism of nucleobase formation
- 1.
SYSNO ASEP 0442228 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název High-energy chemistry of formamide: A unified mechanism of nucleobase formation Tvůrce(i) Ferus, M. (CZ)
Nesvorný, D. (CZ)
Šponer, J. (CZ)
Kubelík, Petr (FZU-D) RID, ORCID
Michalčíková, R. (CZ)
Shestivska, V. (CZ)
Šponer, J.E. (CZ)
Civiš, S. (CZ)Zdroj.dok. Proceedings of the National Academy of Sciences of the United States of America. - : National Academy of Sciences - ISSN 0027-8424
Roč. 112, č. 3 (2015), s. 657-662Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova origin of life ; asteroid impact ; biomolecules ; LIDB Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Institucionální podpora FZU-D - RVO:68378271 UT WOS 000348040700025 EID SCOPUS 84921327907 DOI 10.1073/pnas.1412072111 Anotace The coincidence of the Late Heavy Bombardment (LHB) period and the emergence of terrestrial life about 4 billion years ago suggest that extraterrestrial impacts could contribute to the synthesis of the building blocks of the first life-giving molecules. We simulated the high-energy synthesis of nucleobases from formamide during the impact of an extraterrestrial body. A high-power laser has been used to induce the dielectric breakdown of the plasma produced by the impact. The results demonstrate that the initial dissociation of the formamide molecule could produce a large amount of highly reactive CN and NH radicals. Our findings demonstrate that extraterrestrial impacts, which were one order of magnitude more abundant during the LHB period than before and after, could not only destroy the existing ancient life forms, but could also contribute to the creation of biogenic molecules. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2016
Počet záznamů: 1