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Statements

Subject Item
n2:RIV%2F61388963%3A_____%2F11%3A00364650%21RIV12-AV0-61388963
rdf:type
n12:Vysledek skos:Concept
dcterms: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.
dcterms: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
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
skos:notation
RIV/61388963:_____/11:00364650!RIV12-AV0-61388963
n12:predkladatel
n13:ico%3A61388963
n4:aktivita
n16:Z n16:P
n4:aktivity
P(ED0001/01/01), P(GAP503/10/0947), P(LC512), Z(AV0Z40550506), Z(MSM0021622412)
n4:cisloPeriodika
8
n4:dodaniDat
n14:2012
n4:domaciTvurceVysledku
n20:9831339
n4:druhVysledku
n19:J
n4:duvernostUdaju
n18:S
n4:entitaPredkladatele
n8:predkladatel
n4:idSjednocenehoVysledku
190155
n4:idVysledku
RIV/61388963:_____/11:00364650
n4:jazykVysledku
n11:eng
n4:klicovaSlova
water-ice; photochemical decomposition; dibenzyl-ketones
n4:klicoveSlovo
n5:photochemical%20decomposition n5:water-ice n5:dibenzyl-ketones
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[AE340E2117A3]
n4:nazevZdroje
Environmental Science and Technology
n4:obor
n17:CF
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
4
n4:projekt
n9:ED0001%2F01%2F01 n9:GAP503%2F10%2F0947 n9:LC512
n4:rokUplatneniVysledku
n14:2011
n4:svazekPeriodika
45
n4:tvurceVysledku
Ray, D. Kurková, R. Klán, P. Nachtigallová, Dana
n4:wos
000289341300035
n4:zamer
n15:MSM0021622412 n15:AV0Z40550506
s:issn
0013-936X
s:numberOfPages
7
n6:doi
10.1021/es104095g