Results 21 to 30 of about 52,584 (243)

Effect of jasmonate and vermicompost on chlorophyll fluorescence and photosynthetic yield in Dracocephalum moldavica L. under lead stress condition [PDF]

تنش های محیطی در علوم زراعی
IntroductionDracocephalum moldavica L. is a herbaceous, annual plant from the Lamiaceae family that is native to Central Asia and domesticated in Central and Eastern Europe.
Raheleh Rahbarian, Elham Azizi, Asieh Behdad, Atena Mirblook   +3 more
doaj   +1 more source

Diatom Proteomics Reveals Unique Acclimation Strategies to Mitigate Fe Limitation [PDF]

, 2015
Phytoplankton growth rates are limited by the supply of iron (Fe) in approximately one third of the open ocean, with major implications for carbon dioxide sequestration and carbon (C) biogeochemistry.
Boyd, Philip W., Faux, Jessica F., Goodlett, David R., Harvey, H. Rodger, Hippmann, Anna A., Maldonado, Maria T., Nunn, Brook L., Strzepek, Robert F.   +7 more
core   +1 more source

CHEMICALLY MODIFIED PHOTOSYNTHETIC BACTERIAL REACTION CENTERS: CIRCULAR DICHROISM, RAMAN RESONANCE, LOW TEMPERATURE ABSORPTION, FLUORESCENCE AND ODMR SPECTRA AND POLYPEPTIDE COMPOSITION OF BOROHYDRIDE TREATED REACTION CENTERS FROM Rhodobacter sphaeroides R26 [PDF]

, 1988
Reaction centers from Rhodobacter sphaeroides have been modified by treatment with sodium borohydride similar to the original procedure [Ditson et al., Biochim. Biophys. Acta 766, 623 (1984)], and investigated spectroscopically and by gel electrophoresis.
Angerhofer A., Angerhofer A., Beck J., Breton J., Clayton R. K., Crestfield A. M., Feher G., Hoff A., Holten D., Lutz M., Lutz M., Ogrodnik A., Reed D. W., Robert B., Steiner R.   +14 more
core   +1 more source

Direct and indirect electron transfer from cytochromes c and c₂ to the photosynthetic reaction center in pigment‐protein complexes isolated from Rhodocyclus gelatinosus

FEBS Letters, 1988
Electron transfer from soluble cytochromes c and c 2 to the photo‐oxidized bacteriochlorophyll dimer was studied in photosynthetic reaction center (RC) complexes and RC‐B870 complexes isolated from Rhodocyclus gelatinosus. In the RC‐B870 complex which consists of 6 polypeptides including a bound cytochrome subunit, cytochrome c from horse heart or ...
Matsuura, Katsumi, Fukushima, Atsushi, Shimada, Keizo, Satoh, Toshio   +3 more
openaire   +1 more source

The Ability of Cyanobacterial Cells to Restore UV-B Radiation Induced Damage to Photosystem II is Influenced by Photolyase Dependent DNA Repair [PDF]

, 2013
Damage of DNA and Photosystem-II are among the most significant effects of UV-B irradiation in photosynthetic organisms. Both damaged DNA and Photosystem-II can be repaired, which represent important defense mechanisms against detrimental UV-B effects ...
Kós, Péter, Nagy, Csaba István, Sass, László, Vass, Imre, Vass, István-Zoltán   +4 more
core   +1 more source

Models and measurements of energy-dependent quenching. [PDF]

, 2013
Energy-dependent quenching (qE) in photosystem II (PSII) is a pH-dependent response that enables plants to regulate light harvesting in response to rapid fluctuations in light intensity.
Amarnath, Kapil, FLEMING, Graham R, Sylak-Glassman, Emily, Zaks, Julia   +3 more
core   +1 more source

Dammarenediol II enhances etoposide‐induced apoptosis by targeting O‐GlcNAc transferase and Akt/GSK3β/mTOR signaling in liver cancer

Molecular Oncology, EarlyView.
Etoposide induces DNA damage, activating p53‐dependent apoptosis via caspase‐3/7, which cleaves PARP1. Dammarenediol II enhances this apoptotic pathway by suppressing O‐GlcNAc transferase activity, further decreasing O‐GlcNAcylation. The reduction in O‐GlcNAc levels boosts p53‐driven apoptosis and influences the Akt/GSK3β/mTOR signaling pathway ...
Jaehoon Lee, Byung‐Cheol Han, Gi‐Bang Koo, Jihye Park, Mijin Kwon, Young Bin Park, Jae‐Mun Choi, Seung‐Ho Lee, Sangho Roh   +8 more
wiley   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Chemoselective Sequential Polymerization: An Approach Toward Mixed Plastic Waste Recycling

Advanced Functional Materials, EarlyView.
Inspired by biological protein metabolism, this study demonstrates the closed‐loop recycling of mixed synthetic polymers via ring‐closing depolymerization followed by a chemoselective sequential polymerizations process. The approach recovers pure polymers from mixed feedstocks, even in multilayer formats, highlighting a promising strategy to overcome a
Gadi Slor, Youwei Ma, Hyunwoo Park, Tae‐Lim Choi, Damien Guironnet, Francesco Stellacci   +5 more
wiley   +1 more source

Influence of subunit structure on the oligomerization state of light harvesting complexes: a free energy calculation study

, 2005
Light harvesting complexes 2 (LH2) from Rhodospirillum (Rs.) molischianum and Rhodopseudomonas (Rps.) acidophila form ring complexes out of eight or nine identical subunits, respectively.
Bahatyrova, Braun, Cogdell, Comayras, Damjanovic, Davis, Fleming, Frenkel, Frenkel, H. Keer, Hartigan, Hu, Humphrey, I. Kosztin, Jamieson, Jungas, Kale, Karrasch, Kehoe, Koblizek, Koepke, Koepke, Kumar, L. Janosi, MacKerell, McDermott, Meadows, Montoya, Olsen, Pandit, Papiz, Parkes-Loach, Parkes-Loach, Prince, Ranck, Risken, Ritz, Ritz, Roszak, Roux, Scheuring, Scheuring, Scheuring, Scheuring, Scheuring, Schubert, Schwieters, Sundstrom, T. Ritz, Todd, Todd, Végh, Walz   +52 more
core   +1 more source