Matches in SemOpenAlex for { <https://semopenalex.org/work/W1980724863> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W1980724863 endingPage "305" @default.
- W1980724863 startingPage "297" @default.
- W1980724863 abstract "The parameters listed in the title were determined within the context of a model for the photochemical apparatus of photosynthesis. The fluorescence of variable yield at 750 nm at −196 °C is due to energy transfer from Photosystem II to Photosystem I. Fluorescence excitation spectra were measured at −196 °C at the minimum, FO, level and the maximum, FM, level of the emission at 750 nm. The difference spectrum, FM–FO, which represents the excitation spectrum for FV is presented as a pure Photosystem II excitation spectrum. This spectrum shows a maximum at 677 nm, attributable to the antenna chlorophyll a of Photosystem II units, with a shoulder at 670 nm and a smaller maximum at 650 nm, presumably due to chlorophyll a and chlorophyll b of the light-harvesting chlorophyll complex. Fluorescence at the FO level at 750 nm can be considered in two parts; one part due to the fraction of absorbed quanta, α, which excites Photosystem I more-or-less directly and another part due to energy transfer from Photosystem II to Photosystem I. The latter contribution can be estimated from the ratio of FOFV measured at 692 nm and the extent of FV at 750 nm. According to this procedure the excitation spectrum of Photosystem I at −196 °C was determined by subtracting 13 of the excitation spectrum of FV at 750 nm from the excitation spectrum of FO at 750 nm. The spectrum shows a relatively sharp maximum at 681 nm due to the antenna chlorophyll a of Photosystem I units with probably some energy transfer from the light-harvesting chlorophyll complex. The wavelength dependence of α was determined from fluorescence measurements at 692 and 750 nm at −196 °C. α is constant to within a few percent from 400 to 680 nm, the maximum deviation being at 515 nm where α shows a broad maximum increasing from 0.30 to 0.34. At wavelengths between 680 and 700 nm, α increases to unity as Photosystem I becomes the dominant absorber in the photochemical apparatus." @default.
- W1980724863 created "2016-06-24" @default.
- W1980724863 creator A5048306413 @default.
- W1980724863 creator A5050207230 @default.
- W1980724863 date "1975-12-01" @default.
- W1980724863 modified "2023-09-23" @default.
- W1980724863 title "Excitation spectra for Photosystem I and Photosystem II in chloroplasts and the spectral characteristics of the distribution of quanta between the two photosystems" @default.
- W1980724863 cites W1973847797 @default.
- W1980724863 cites W2005125849 @default.
- W1980724863 cites W2087319415 @default.
- W1980724863 doi "https://doi.org/10.1016/0005-2728(75)90131-0" @default.
- W1980724863 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/1191662" @default.
- W1980724863 hasPublicationYear "1975" @default.
- W1980724863 type Work @default.
- W1980724863 sameAs 1980724863 @default.
- W1980724863 citedByCount "105" @default.
- W1980724863 countsByYear W19807248632012 @default.
- W1980724863 countsByYear W19807248632013 @default.
- W1980724863 countsByYear W19807248632014 @default.
- W1980724863 countsByYear W19807248632015 @default.
- W1980724863 countsByYear W19807248632016 @default.
- W1980724863 countsByYear W19807248632017 @default.
- W1980724863 countsByYear W19807248632019 @default.
- W1980724863 countsByYear W19807248632020 @default.
- W1980724863 countsByYear W19807248632021 @default.
- W1980724863 countsByYear W19807248632022 @default.
- W1980724863 countsByYear W19807248632023 @default.
- W1980724863 crossrefType "journal-article" @default.
- W1980724863 hasAuthorship W1980724863A5048306413 @default.
- W1980724863 hasAuthorship W1980724863A5050207230 @default.
- W1980724863 hasConcept C113196181 @default.
- W1980724863 hasConcept C123669783 @default.
- W1980724863 hasConcept C154828652 @default.
- W1980724863 hasConcept C178790620 @default.
- W1980724863 hasConcept C183688256 @default.
- W1980724863 hasConcept C185592680 @default.
- W1980724863 hasConcept C188231169 @default.
- W1980724863 hasConcept C206865886 @default.
- W1980724863 hasConcept C2776373379 @default.
- W1980724863 hasConcept C2778902199 @default.
- W1980724863 hasConcept C43617362 @default.
- W1980724863 hasConcept C50634751 @default.
- W1980724863 hasConcept C55493867 @default.
- W1980724863 hasConcept C75473681 @default.
- W1980724863 hasConcept C80298142 @default.
- W1980724863 hasConcept C89389743 @default.
- W1980724863 hasConceptScore W1980724863C113196181 @default.
- W1980724863 hasConceptScore W1980724863C123669783 @default.
- W1980724863 hasConceptScore W1980724863C154828652 @default.
- W1980724863 hasConceptScore W1980724863C178790620 @default.
- W1980724863 hasConceptScore W1980724863C183688256 @default.
- W1980724863 hasConceptScore W1980724863C185592680 @default.
- W1980724863 hasConceptScore W1980724863C188231169 @default.
- W1980724863 hasConceptScore W1980724863C206865886 @default.
- W1980724863 hasConceptScore W1980724863C2776373379 @default.
- W1980724863 hasConceptScore W1980724863C2778902199 @default.
- W1980724863 hasConceptScore W1980724863C43617362 @default.
- W1980724863 hasConceptScore W1980724863C50634751 @default.
- W1980724863 hasConceptScore W1980724863C55493867 @default.
- W1980724863 hasConceptScore W1980724863C75473681 @default.
- W1980724863 hasConceptScore W1980724863C80298142 @default.
- W1980724863 hasConceptScore W1980724863C89389743 @default.
- W1980724863 hasIssue "3" @default.
- W1980724863 hasLocation W19807248631 @default.
- W1980724863 hasLocation W19807248632 @default.
- W1980724863 hasOpenAccess W1980724863 @default.
- W1980724863 hasPrimaryLocation W19807248631 @default.
- W1980724863 hasRelatedWork W1996655929 @default.
- W1980724863 hasRelatedWork W1997520105 @default.
- W1980724863 hasRelatedWork W2037737388 @default.
- W1980724863 hasRelatedWork W2039994761 @default.
- W1980724863 hasRelatedWork W2042167454 @default.
- W1980724863 hasRelatedWork W2054162333 @default.
- W1980724863 hasRelatedWork W2063776480 @default.
- W1980724863 hasRelatedWork W2065019930 @default.
- W1980724863 hasRelatedWork W3176020 @default.
- W1980724863 hasRelatedWork W4249071137 @default.
- W1980724863 hasVolume "408" @default.
- W1980724863 isParatext "false" @default.
- W1980724863 isRetracted "false" @default.
- W1980724863 magId "1980724863" @default.
- W1980724863 workType "article" @default.