About: Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex

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About: Time-resolved Luminescence and Singlet Oxygen Formation After Illumination of the Hypericin-Low-density Lipoprotein Complex Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
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 (en)
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 (en)
skos:notation	RIV/00216208:11320/09:00206345!RIV10-MSM-11320___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM0021620835)
http://linked.open...iv/cisloPeriodika	85
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Dědic, Roman Hála, Jan
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	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	346370
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/09:00206345
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Time-resolved; Luminescence; Singlet; Oxygen; Formation; After; Illumination; Hypericin-Low-density; Lipoprotein; Complex (en)
http://linked.open.../riv/klicoveSlovo	Luminescence Complex Oxygen Time-resolved After Formation Illumination Hypericin-Low-density Lipoprotein Singlet
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[50853EE3BBFC]
http://linked.open...i/riv/nazevZdroje	Photochemistry and Protobiology
http://linked.open...in/vavai/riv/obor	BH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	2009
http://linked.open...iv/tvurceVysledku	Dědic, Roman Hála, Jan Gbur, Peter Miškovský, Pavol Chorvat, Dušan Jančura, Dušan
http://linked.open...ain/vavai/riv/wos	000265431300023
http://linked.open...n/vavai/riv/zamer	Fyzika molekulárních, makromolekulárních a biologických systémů
issn	0031-8655
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	11320

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