Results 41 to 50 of about 90,453 (337)

Reduced model of photosystem II and its use to evaluate the photosynthetic apparatus characteristics according to the fluorescence induction curves [PDF]

Компьютерные исследования и моделирование, 2012
The approach for the analysis of some large-scale biological systems, on the base of quasiequilibrium stages is proposed. The approach allows us to reduce the detailed large-scaled models and obtain the simplified model with an analytical solution.
T. Yu. Plusnina, E. N. Voronova, V. N. Goltzev, Sergei Iosifovich Pogosyan, O. V. Yakovleva, Galina Yu. Riznichenko, Andrei B. Rubin   +6 more
doaj   +1 more source

Cyanobacterial Acclimation to Photosystem I or Photosystem II Light [PDF]

Plant Physiology, 1986
The organization and function of the photochemical apparatus of Synechococcus 6301 was investigated in cells grown under yellow and red light regimes. Broadband yellow illumination is absorbed preferentially by the phycobilisome (PBS) whereas red light is absorbed primarily by the chlorophyll (Chl) pigment beds.
A, Manodori, A, Melis
openaire   +2 more sources

Chlorophyll Fluorescence Measurements in Arabidopsis Wild-type and Photosystem II Mutant Leaves

Bio-Protocol, 2015
Chlorophyll fluorescence measurement is a widely used technique to determine photosynthetic performance. Light energy absorbed by a chlorophyll molecule can be dissipated by driving photochemical energy conversion, as heat in non-photochemical quenching ...
Iris Steinberger, Felix Egidi, Anja Schneider   +2 more
doaj   +1 more source

Cryo‐EM of Rationally Designed Photosystem I Nanoassembly on Graphene Validates Orientation‐Driven Enhancement of Photocatalytic Performance

Advanced Functional Materials, EarlyView.
The first cryo‐EM visualization and quantification of oriented Photosystem I (PSI) on single‐layer graphene is reported. Domain‐specific covalent anchoring of PSI, with the reducing side of the biophotocatalyst toward graphene, promotes three‐fold higher anodic photocurrent generation compared to a randomly physisorbed counterpart. This approach allows
Miriam Izzo, Margot Jacquet, Tomasz Góral, Marcin Strawski, Takayuki Fujiwara, Shin‐ya Miyagishima, Joanna Kargul   +6 more
wiley   +1 more source

Quality Control of Photosystem II [PDF]

Plant and Cell Physiology, 2001
Photosystem II is particularly vulnerable to excess light. When illuminated with strong visible light, the reaction center D1 protein is damaged by reactive oxygen molecules or by endogenous cationic radicals generated by photochemical reactions, which is followed by proteolytic degradation of the damaged D1 protein.
openaire   +2 more sources

Specific association of photosystem II and light‐harvesting complex II in partially solubilized photosystem II membranes [PDF]

FEBS Letters, 1998
In this study, we report the structural characterization of photosystem II complexes obtained from partially solubilized photosystem II membranes. Direct observation by electron microscopy, within a few minutes after a mild disruption of the membranes with the detergent n‐dodecyl‐α,d‐maltoside, revealed the presence of several large supramolecular ...
Boekema, EJ, van Roon, H, Dekker, JP, Dekker, Jan P.   +3 more
openaire   +4 more sources

Plants lacking the main light-harvesting complex retain photosystem II macro-organization [PDF]

, 2003
Photosystem II (PSII) is a key component of photosynthesis, the process of converting sunlight into the chemical energy of life. In plant cells, it forms a unique oligomeric macrostructure in membranes of the chloroplasts.
A Haldrup, A Kuttkat, A Zouni, AE Yakushevska, AV Ruban, B Hankamer, B Hankamer, DA Berthold, EJ Boekema, EJ Boekema, EJ Boekema, EJ Boekema, G Garab, GF Peter, H Paulsen, J Andersson, J Barber, J Nield, JF Allen, P Horton, R Croce, RG Walters, S Hobe, S Jansson, S Jansson, T Bibby, UK Laemmli, W Kühlbrandt   +27 more
core   +5 more sources

Carbon Contacts to Proteins Enable Robust, Biocompatible Electronic Junctions with Near‐Activation‐less Conduction Down to 10 K

Advanced Functional Materials, EarlyView.
A robust solid‐state protein junction with a semi‐transparent eC/Au electrode allows photoexcitation of the bacterio‐rhodopsin, bR layer, to isomerize the bR retinal. The resulting photo‐response shows the protein is functional in the solid‐state junction.
Shailendra K. Saxena, Sudipta Bera, Tatyana Bendikov, Israel Pecht, Mordechai Sheves, David Cahen   +5 more
wiley   +1 more source

Effects of spine-shading on aspects of photosynthesis for three cactus species

Botan‪ical Sciences, 2016
We evaluated the effect of spine removal on three cactus species varying in spine-shading of stems. Turbinicarpus schmiedickeanus showed the greater spine shading (c. 61 %), followed by Mammillaria zephyranthoides (43 %), and Echinocactus platyacanthus (
Edilia de la Rosa-Manzano, Joel Flores, Pablo Delgado-Sánchez   +2 more
doaj   +1 more source

Multiple functions of photosystem II.

Indian journal of biochemistry & biophysics, 2000
The most important function of photosystem II (PSII) is its action as a water-plastoquinone oxido-reductase. At the expense of light energy, water is split, and oxygen and plastoquinol are formed. In addition to this most important activity, PSII has additional functions, especially in the regulation of (light) energy distribution.
van Rensen, J.J.S., Curwiel, V.B.
openaire   +3 more sources