FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2091465308> ?p ?o ?g. }

• W2091465308 endingPage "333" @default.
• W2091465308 startingPage "322" @default.
• W2091465308 abstract "Abstract The kinetics and the yield of the primary charge separation in whole cells of Rps. viridis was studied with the light-gradient technique using 30 ps and 12 ns flashes at 532 nm and 1064 nm. When the menaquinone acceptor, QA, of the reaction centers (RCs) is oxidized the primary charge separation occurs with two electrogenic phases. The faster phase with a time constant of 45 ± 20 ps contributed with 40% and the slower phase with a time constant of 140 ± 15 ps contributed with 60% to the total electrogenicity. We interpret the fast phase as the trapping time, monitored by the charge separation between the primary donor P-965 and the intermediary pheophytin acceptor, H. The second phase is ascribed to the electron transfer from H to QA. The reduction of QA, either chemically or photochemically, prior to the flash leaves only the fast rising phase. This signal decays with a time constant of 2.3–2.8 ns. At the excitation wavelength of 1064 nm the quantum yield of primary photochemistry is 0.97 ± 0.07. The reduction of QA does not change the quantum yield. The recombination of the state P+H− when QA is reduced can repopulate the excited state (ant.·P)∗ as demonstrated by a fluorescence phase with the same time constant. The fast phase of fluorescence was not affected by the reduction of QA, indicating an unaffected primary photochemistry. Fluorescence measurements with double flashes delayed by nanoseconds showed that the quenching power of P+ is approx. 1.4-times smaller than that of P. A comparison of the photovoltage amplitude evoked by 12 ns flashes and 30 ps flashes at 1064 nm revealed marked competition between annihilation and trapping. At 532 nm the competition was less pronounced. The influence of the fraction of closed RCs (as defined by the state P+Q−A on the trapping efficiency was studied by excitation with trains of 30 ps flashes. These data and the data resulting from the nanosecond versus picosecond measurements are analyzed with a theory for the light-gradient photovoltage (Leibl and Trissl (1990) Biochim. Biophys. Acta 1015, 304–312) and a theory of exciton dynamics in the lake model (Deprez et al. (1990) Biochim. Biophys. Acta 1015, 295–303)." @default.
• W2091465308 created "2016-06-24" @default.
• W2091465308 creator A5016496110 @default.
• W2091465308 creator A5017285266 @default.
• W2091465308 creator A5029514225 @default.
• W2091465308 creator A5060925313 @default.
• W2091465308 creator A5068793500 @default.
• W2091465308 date "1990-02-01" @default.
• W2091465308 modified "2023-09-24" @default.
• W2091465308 title "Trapping kinetics, annihilation, and quantum yield in the photosynthetic purple bacterium Rps. viridis as revealed by electric measurement of the primary charge separation" @default.
• W2091465308 cites W1736072186 @default.
• W2091465308 cites W1916260872 @default.
• W2091465308 cites W1966099222 @default.
• W2091465308 cites W1969158737 @default.
• W2091465308 cites W1993964481 @default.
• W2091465308 cites W1997344818 @default.
• W2091465308 cites W2000220640 @default.
• W2091465308 cites W2002592924 @default.
• W2091465308 cites W2007902027 @default.
• W2091465308 cites W2007948027 @default.
• W2091465308 cites W2008753780 @default.
• W2091465308 cites W2010105343 @default.
• W2091465308 cites W2017391050 @default.
• W2091465308 cites W2017948172 @default.
• W2091465308 cites W2022942409 @default.
• W2091465308 cites W2028579943 @default.
• W2091465308 cites W2028767886 @default.
• W2091465308 cites W2031762873 @default.
• W2091465308 cites W2035974269 @default.
• W2091465308 cites W2036374614 @default.
• W2091465308 cites W2036795110 @default.
• W2091465308 cites W2039876863 @default.
• W2091465308 cites W2047549397 @default.
• W2091465308 cites W2058729226 @default.
• W2091465308 cites W2064116978 @default.
• W2091465308 cites W2065510140 @default.
• W2091465308 cites W2066510192 @default.
• W2091465308 cites W2068163456 @default.
• W2091465308 cites W2070679584 @default.
• W2091465308 cites W2076677087 @default.
• W2091465308 cites W2078093950 @default.
• W2091465308 cites W2078965489 @default.
• W2091465308 cites W2080246511 @default.
• W2091465308 cites W2080434379 @default.
• W2091465308 cites W2082398166 @default.
• W2091465308 cites W2085224459 @default.
• W2091465308 cites W2092119272 @default.
• W2091465308 cites W2157633837 @default.
• W2091465308 doi "https://doi.org/10.1016/0005-2728(90)90037-5" @default.
• W2091465308 hasPublicationYear "1990" @default.
• W2091465308 type Work @default.
• W2091465308 sameAs 2091465308 @default.
• W2091465308 citedByCount "29" @default.
• W2091465308 countsByYear W20914653082016 @default.
• W2091465308 crossrefType "journal-article" @default.
• W2091465308 hasAuthorship W2091465308A5016496110 @default.
• W2091465308 hasAuthorship W2091465308A5017285266 @default.
• W2091465308 hasAuthorship W2091465308A5029514225 @default.
• W2091465308 hasAuthorship W2091465308A5060925313 @default.
• W2091465308 hasAuthorship W2091465308A5068793500 @default.
• W2091465308 hasConcept C109214941 @default.
• W2091465308 hasConcept C120665830 @default.
• W2091465308 hasConcept C121332964 @default.
• W2091465308 hasConcept C134121241 @default.
• W2091465308 hasConcept C148898269 @default.
• W2091465308 hasConcept C159467904 @default.
• W2091465308 hasConcept C171001562 @default.
• W2091465308 hasConcept C183688256 @default.
• W2091465308 hasConcept C184779094 @default.
• W2091465308 hasConcept C185544564 @default.
• W2091465308 hasConcept C185592680 @default.
• W2091465308 hasConcept C188082385 @default.
• W2091465308 hasConcept C18903297 @default.
• W2091465308 hasConcept C201941533 @default.
• W2091465308 hasConcept C2777924906 @default.
• W2091465308 hasConcept C41999313 @default.
• W2091465308 hasConcept C59822182 @default.
• W2091465308 hasConcept C62520636 @default.
• W2091465308 hasConcept C86803240 @default.
• W2091465308 hasConcept C91881484 @default.
• W2091465308 hasConcept C97355855 @default.
• W2091465308 hasConceptScore W2091465308C109214941 @default.
• W2091465308 hasConceptScore W2091465308C120665830 @default.
• W2091465308 hasConceptScore W2091465308C121332964 @default.
• W2091465308 hasConceptScore W2091465308C134121241 @default.
• W2091465308 hasConceptScore W2091465308C148898269 @default.
• W2091465308 hasConceptScore W2091465308C159467904 @default.
• W2091465308 hasConceptScore W2091465308C171001562 @default.
• W2091465308 hasConceptScore W2091465308C183688256 @default.
• W2091465308 hasConceptScore W2091465308C184779094 @default.
• W2091465308 hasConceptScore W2091465308C185544564 @default.
• W2091465308 hasConceptScore W2091465308C185592680 @default.
• W2091465308 hasConceptScore W2091465308C188082385 @default.
• W2091465308 hasConceptScore W2091465308C18903297 @default.
• W2091465308 hasConceptScore W2091465308C201941533 @default.
• W2091465308 hasConceptScore W2091465308C2777924906 @default.
• W2091465308 hasConceptScore W2091465308C41999313 @default.
• W2091465308 hasConceptScore W2091465308C59822182 @default.

• next