Results 281 to 290 of about 51,482 (311)

Relationship between photosystem II activity and CO₂ fixation in leaves

Physiologia Plantarum, 1992
There is now potential to estimate photosystem II (PSII) activity in vivo from chlorophyll fluorescence measurements and thus gauge PSII activity per CO2 fixed. A measure of the quantum yield of photosystem II, ΦII (electron/photon absorbed by PSII), can be obtained in leaves under steady‐state conditions in the light using a modulated fluorescence ...
John P Krall, Gerald E. Edwards
openaire   +1 more source

Purification of fully active and crystallizable photosystem II from thermophilic cyanobacteria

2018
Photosystem II (PSII) is a membrane protein complex which functions to catalyze light-induced water oxidation in oxygenic photosynthesis. Through the water-splitting reaction of PSII, light energy is converted into biologically useful chemical energy, and molecular oxygen is formed which transformed the atmosphere into an aerobic one and sustained ...
Keisuke, Kawakami, Jian-Ren, Shen
openaire   +2 more sources

ChemInform Abstract: Structure‐Activity Studies on Amides Inhibiting Photosystem II.

ChemInform, 1992
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
R. J. LEWIS, P. CAMILLERI, A. J. KIRBY, C. A. MARBY, A. A. SLAWIN, D. J. WILLIAMS   +5 more
openaire   +1 more source

Performance of active Photosystem II centers in photoinhibited pea leaves

Photosynthesis Research, 1999
Effects of photoinhibition on photosynthesis in pea (Pisum sativum L.) leaves were investigated by studying the relationship between the severity of a photoinhibitory treatment (measured as Fv/Fm) and several photoacoustic and chlorophyll a fluorescence parameters.
Schansker, G., van Rensen, J.J.S.
openaire   +1 more source

Influence of Dark Starvation on Photochemical Activities Involving Photosystem I or Photosystem II

1972
It has been well known to plant physiologists for a long time that in leaves of dark starved plants, carbohydrates disappear first, followed by proteins (McKEE 1958). Finally, after a longer time of dark starvation, the chlorophylls are degraded. The results presented here are concerned with the influence of darkening upon enzymes and other compounds ...
openaire   +1 more source

The Position and Orientation of Active Carotenoid in Photosystem II

2013
The distances between YD and active carotenoid have been determined in cyanobacterium (synecochoccus vulcanus) and spinach PSII by pulsed electron double resonance (PELDOR). The observed spectra were analyzed taking into spin distribution of over 30 carbon atoms in the carotenoid molecule. The result of simulations based on the recent crystal structure
Asako Kawamori, Hiroyuki Mino, Jianren Shen   +2 more
openaire   +1 more source

Hydrogen Bond Structure of Redox Active Tyrosines in Photosystem II

2020
In photosystem II (PSII), the redox-active tyrosine YZ (D1-Y161) mediates electron transfer from the water-oxidizing center to P680 in the main electron transfer pathway. In addition, the presence of YZ in the hydrogen bond network connecting the Mn cluster to the lumen suggests that it may be involved in proton transfer in the water oxidation process.
openaire   +1 more source

Vicia guard cell protoplasts lack photosystem II activity

Naturwissenschaften, 1980
H. Schnabl, R. Hampp
openaire   +1 more source

American Cancer Society nutrition and physical activity guideline for cancer survivors

Ca-A Cancer Journal for Clinicians, 2022
Cheryl L Rock, Cynthia A Thomson, Marian L Neuhouser   +2 more
exaly  

American Cancer Society guideline for diet and physical activity for cancer prevention

Ca-A Cancer Journal for Clinicians, 2020
Cheryl L Rock, Cynthia A Thomson, Ted Gansler   +2 more
exaly