About: Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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 12 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. 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 12 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. (en)
Title	Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies (en)
skos:prefLabel	Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies Chemistry of Small Organic Molecules on Snow Grains: The Applicability of Artificial Snow for Environmental Studies (en)
skos:notation	RIV/61388963:_____/11:00364650!RIV12-AV0-61388963
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED0001/01/01), P(GAP503/10/0947), P(LC512), Z(AV0Z40550506), Z(MSM0021622412)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Nachtigallová, Dana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav organické chemie a biochemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	190155
http://linked.open...ai/riv/idVysledku	RIV/61388963:_____/11:00364650
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	water-ice; photochemical decomposition; dibenzyl-ketones (en)
http://linked.open.../riv/klicoveSlovo	dibenzyl-ketones photochemical decomposition water-ice
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[AE340E2117A3]
http://linked.open...i/riv/nazevZdroje	Environmental Science and Technology
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	CETOCOEN Center for biomolecules and complex molecular systems Implications of photochemical activity of organic pollutants in polar regions
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	45
http://linked.open...iv/tvurceVysledku	Klán, P. Kurková, R. Nachtigallová, Dana Ray, D.
http://linked.open...ain/vavai/riv/wos	000289341300035
http://linked.open...n/vavai/riv/zamer	Regulace biologických procesů: Chemické modulátory vybraných systémů významných pro medicínu a zemědělství Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)
issn	0013-936X
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/es104095g

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