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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F09%3A00206345%21RIV10-MSM-11320___
rdf:type
n11:Vysledek skos:Concept
dcterms:description
Time-resolved fluorescence and phosphorescence study of hypericin (Hyp) in complex with low-density lipoproteins (LDL) as well as the evolution of singlet oxygen formation and annihilation after illumination of Hyp LDL complexes at room temperature are presented in this work. The observed shortening of the fluorescence lifetime of Hyp at high Hyp LDL molar ratios (}25:1) proves the self-quenching of the excited singlet state of monomeric Hyp at these concentration ratios. The very short lifetime (_0.5 ns) of Hyp fluorescence at very high Hyp LDL ratios (}150:1) suggests that at high local Hyp concentration inside LDL molecules fast and ultrafast nonradiative decay processes from excited singlet state of Hyp become more important. Contrary to the lifetime of the singlet excited state, the lifetime (its shorter component) of Hyp phosphorescence is not dependent on Hyp LDL ratio in the studied concentration range. Time-resolved fluorescence and phosphorescence study of hypericin (Hyp) in complex with low-density lipoproteins (LDL) as well as the evolution of singlet oxygen formation and annihilation after illumination of Hyp LDL complexes at room temperature are presented in this work. The observed shortening of the fluorescence lifetime of Hyp at high Hyp LDL molar ratios (}25:1) proves the self-quenching of the excited singlet state of monomeric Hyp at these concentration ratios. The very short lifetime (_0.5 ns) of Hyp fluorescence at very high Hyp LDL ratios (}150:1) suggests that at high local Hyp concentration inside LDL molecules fast and ultrafast nonradiative decay processes from excited singlet state of Hyp become more important. Contrary to the lifetime of the singlet excited state, the lifetime (its shorter component) of Hyp phosphorescence is not dependent on Hyp LDL ratio in the studied concentration range.
dcterms:title
Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex
skos:prefLabel
Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex
skos:notation
RIV/00216208:11320/09:00206345!RIV10-MSM-11320___
n3:aktivita
n15:Z
n3:aktivity
Z(MSM0021620835)
n3:cisloPeriodika
85
n3:dodaniDat
n9:2010
n3:domaciTvurceVysledku
n6:1133268 n6:9749713
n3:druhVysledku
n8:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
346370
n3:idVysledku
RIV/00216208:11320/09:00206345
n3:jazykVysledku
n5:eng
n3:klicovaSlova
Time-resolved; Luminescence; Singlet; Oxygen; Formation; After; Illumination; Hypericin-Low-density; Lipoprotein; Complex
n3:klicoveSlovo
n7:Illumination n7:After n7:Oxygen n7:Complex n7:Formation n7:Lipoprotein n7:Hypericin-Low-density n7:Luminescence n7:Singlet n7:Time-resolved
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[50853EE3BBFC]
n3:nazevZdroje
Photochemistry and Protobiology
n3:obor
n13:BH
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
6
n3:rokUplatneniVysledku
n9:2009
n3:svazekPeriodika
2009
n3:tvurceVysledku
Dědic, Roman Miškovský, Pavol Jančura, Dušan Gbur, Peter Chorvat, Dušan Hála, Jan
n3:wos
000265431300023
n3:zamer
n17:MSM0021620835
s:issn
0031-8655
s:numberOfPages
8
n10:organizacniJednotka
11320