Results 131 to 140 of about 1,487 (149)
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Photosynthesis Research, 1992
Chlorophyll fluorescence, light scattering, the electrochromic shift P515 and levels of some photosynthetic intermediates were measured in illuminated leaves. Oxygen and CO2 concentrations in the gas phase were varied in order to obtain information on control of Photosystem II activity under conditions such as produced by water stress, when stomatal ...
U, Heber +4 more
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Chlorophyll fluorescence, light scattering, the electrochromic shift P515 and levels of some photosynthetic intermediates were measured in illuminated leaves. Oxygen and CO2 concentrations in the gas phase were varied in order to obtain information on control of Photosystem II activity under conditions such as produced by water stress, when stomatal ...
U, Heber +4 more
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Journal of the Chemical Society, Faraday Transactions 2, 1986
A flash-spectroscopic study of the quantum yield of the absorption change at 820 nm due to the electron donor, P700, has been carried out with vesicles enriched in the reaction centre of photosystem one of higher plant chloroplasts. Phosphorylation of the light-harvesting chlorophyll a/b containing protein complex (LHC-2) increases the chlorophyll to ...
Alison Telfer +3 more
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A flash-spectroscopic study of the quantum yield of the absorption change at 820 nm due to the electron donor, P700, has been carried out with vesicles enriched in the reaction centre of photosystem one of higher plant chloroplasts. Phosphorylation of the light-harvesting chlorophyll a/b containing protein complex (LHC-2) increases the chlorophyll to ...
Alison Telfer +3 more
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Planta, 1976
The development of photosystem I activity of plastids isolated from greening barley (Hordeum distichum, L.) leaves was studied. The electron transport activity in photosystem I was measured as anthraquinone-mediated oxygen uptake and as light induced absorbance changes of the reaction centre molecule P700.
H, Egnéus, G, Selldén, L, Andersson
exaly +3 more sources
The development of photosystem I activity of plastids isolated from greening barley (Hordeum distichum, L.) leaves was studied. The electron transport activity in photosystem I was measured as anthraquinone-mediated oxygen uptake and as light induced absorbance changes of the reaction centre molecule P700.
H, Egnéus, G, Selldén, L, Andersson
exaly +3 more sources
Chemical Physics Letters, 1987
Abstract A comparative analysis of electron spin echo modulation effects from 15 N nuclei in pyrrole rings of Chl a + and P700 + has been performed, yielding parameters of hyperfine couplings of the nitrogen nuclei in these paramagnetic centres.
A.V. Astashkin +3 more
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Abstract A comparative analysis of electron spin echo modulation effects from 15 N nuclei in pyrrole rings of Chl a + and P700 + has been performed, yielding parameters of hyperfine couplings of the nitrogen nuclei in these paramagnetic centres.
A.V. Astashkin +3 more
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Biofizika, 2000
The light-induced changes in the kinetics of the oxidation of photosystem I reaction center P700 in leaves of C3 and C4 plants, depending on the time of leaf adaptation to dark before the illumination were studied. The EPR 1 signal from oxidized centers P+700 was used to monitor the kinetics of P700 redox transients.
E A, Bishniakova +2 more
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The light-induced changes in the kinetics of the oxidation of photosystem I reaction center P700 in leaves of C3 and C4 plants, depending on the time of leaf adaptation to dark before the illumination were studied. The EPR 1 signal from oxidized centers P+700 was used to monitor the kinetics of P700 redox transients.
E A, Bishniakova +2 more
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Free Radical Biology and Medicine, 2018
We developed the method to produce ROS intrinsically in photosynthetic organisms: repetitive short-pulse (rSP) illumination. rSP illumination fulfills electrons in photosynthetic electron transport (PET) system, where O2 is reduced to superoxide radical and O2 is also excited to singlet O2 at photosystem I (PSI) of PET system.
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We developed the method to produce ROS intrinsically in photosynthetic organisms: repetitive short-pulse (rSP) illumination. rSP illumination fulfills electrons in photosynthetic electron transport (PET) system, where O2 is reduced to superoxide radical and O2 is also excited to singlet O2 at photosystem I (PSI) of PET system.
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Biofizika, 1976
A sharp fall of ESR signal I is observed at temperature decrease while switching on light of 600 nm on the background of light of 707 nm; kinetics of the initiation of the signal under the illumination of light of 707 nm gets more complicated; the induction phase induced by previous illumination with the light of 600 nm increases.
A N, Tikhonov, E K, Ruuge
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A sharp fall of ESR signal I is observed at temperature decrease while switching on light of 600 nm on the background of light of 707 nm; kinetics of the initiation of the signal under the illumination of light of 707 nm gets more complicated; the induction phase induced by previous illumination with the light of 600 nm increases.
A N, Tikhonov, E K, Ruuge
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The Oxidizing Site of Photosystem I Modulates the Electron Transfer from Plastocyanin to P700+
1995Michael Hippler +2 more
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