Počet záznamů: 1
Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies
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SYSNO ASEP 0364650 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies Tvůrce(i) Kurková, R. (CZ)
Ray, D. (CZ)
Nachtigallová, Dana (UOCHB-X) RID, ORCID
Klán, P. (CZ)Celkový počet autorů 4 Zdroj.dok. Environmental Science and Technology - ISSN 0013-936X
Roč. 45, č. 8 (2011), s. 3430-3436Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova water-ice ; photochemical decomposition ; dibenzyl-ketones Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP LC512 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z40550506 - UOCHB-X (2005-2011) UT WOS 000289341300035 DOI 10.1021/es104095g Anotace The utilization of artificial snow for environmentally relevant (photo)chemical studies was systematically investigated. The SSA of artificial snow grains produced in liquid nitrogen was determined using valerophenone photochemistry to estimate the surface coverage by small hydrophobic contaminants. The initial ketone loading, only about 1−2 orders of magnitude higher than the contaminant concentrations found in nature, was already well below monolayer coverage. We found that the efficiency of out-of-cage reactions decreased at much higher temperatures than those for frozen solutions; however, the cage effect was essentially the same no matter what technique of snow production or ketone deposition/uptake was used. The experimental observation that the contaminant molecules are initially self-associated even at the lowest concentrations was supported by DFT calculations. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Rok sběru 2012
Počet záznamů: 1