Results 161 to 170 of about 5,569 (206)

Role of PEPc Isoforms in Phosphate-Deficient Nodules

2008
In soils, the concentration of available P for plants is normally very low, because most of the P combines with iron, aluminium, and calcium to form relatively insoluble compounds (Aono et al., 2001). Phosphate (Pi) deficiency is thought to be one of the limiting factors for nitrogen fixation (Aono et al., 2001) due to the high energy requirement of ...
Kleinert A, Venter M, Kossmann J, Valentine AJ   +3 more
openaire   +1 more source

Cu2O–PEPC Composite Based Pressure Transducer

Arabian Journal for Science and Engineering, 2012
In this study, Al/Cu2O–PEPC/Al pressure transducer was designed and fabricated by drop-casting the blend of Cu2O–PEPC microcomposite thin films of copper oxide (Cu2O) micropowder, (3 wt.%) and poly-N-epoxypropylcarbazole, PEPC, (2 wt.%) in benzol on Al substrates. The thicknesses of the Cu2O–PEPC films were in the range of 30–100 μm.
Kh. S. Karimov, M. Abid, M. Saleem, M. Farooq, Z. M. Karieva, Adam Khan   +5 more
openaire   +1 more source

Regulatory Phosphorylation of Maize C4-Form PEP Carboxylase (PEPC): Antibody Detection System and Purification of PEPC-protein Kinase

1998
Activity of phosphoeno/pyruvate carboxylase (PEPC) for C4 photosynthesis is upregulated by light (reviewed in [1, 2]). The regulation is mediated by a specific protein kinase (PEPC-PK) that phosphorylates Ser near N-terminus (Ser-15 in the maize Ca-form PEPC). This phosphorylation is dependent on light intensity in Ca-plants [3].
Y. Ueno, J. Emura, K. Y. Kumagaye, K. Nakajima, K. Inami, T. Shiba, S. Hata, K. Izui   +7 more
openaire   +1 more source

Hydrogen peroxide regulated photosynthesis in C4-pepc transgenic rice

Plant Physiology and Biochemistry, 2014
In this study, we investigated the photosynthetic physiological basis in 'PC' transgenic rice (Oryza sativa L.), showing high-level expression of the gene encoding C4 phosphoenolpyruvate carboxylase (pepc), by hydrogen peroxide (H2O2). The C4-PEPC gene (pepc) from maize in the transgenic rice plants was checked by PCR.
C G, Ren, X, Li, X L, Liu, X D, Wei, C C, Dai   +4 more
openaire   +2 more sources

Towards a petascale tree code: Scaling and efficiency of the PEPC library

Journal of Computational Science, 2011
Abstract The highly scalable parallel tree code PEPC for rapid computation of long-range (1/ r ) Coulomb forces is presented. It can be used as a library for applications involving electrostatics or Newtonian gravity in 3D. The code is based on the hashed oct-tree algorithm, in which particle coordinates are projected onto a space-filling curve prior
Robert Speck, Lukas Arnold, Paul Gibbon
openaire   +2 more sources

The role of PEPC phosphorylation in theregulation of C4 photosynthesis

1996
Abstract Leaves of C plants are characterized by concentrically organized photosynthetic tissues, i.e. an outer mesophyll (M) surrounding inner bundle sheath (BS) cells in which two metabolic cycles, the C and Calvin cycles, are working in concert to achieve CO assimilation.
P Gadal, V Pacquit, N Giglioll, V -L Bui, J N Piere, C Echevarria, J Vidal   +6 more
openaire   +1 more source

On the mechanisms of photogeneration of charge carriers in PEPC-C60 composites

Physics of the Solid State, 2013
Photogeneration of electric charge carriers at high strengths of the external electric field and the temperature of transition to the viscous-flow state (T visc) of thin PEPC-C60 composite films obtained by casting from a toluene solution have been studied.
M. A. Zabolotny, Yu. M. Barabash, O. P. Dmitrenko, N. P. Kulish, N. A. Davidenko, S. L. Studzinskii, A. P. Olasyuk, A. V. Demchenko   +7 more
openaire   +1 more source

Efficiency and scalability of the parallel Barnes-Hut tree code PEPC

2010
We present scaling results of the parallel tree code PEPC on an IBM BlueGene/P and identify performance bottlenecks and intrinsic algorithmic issues. Using more than 8192 processors the tree code is capable of simulating more than 100 million particles, but as our analysis shows, fundamental changes will be necessary for porting this code to petaflop ...
Robert Speck, Paul Gibbon, Martin Hoffmann 0006   +2 more
openaire   +2 more sources

Molecular Evolution of C4-Form Pepc in Maize: Comparison of Primary Sequences and Kinetic Properties with a Newly Cloned Recombinant Root-Form PEPC

1998
Phosphoenolpyruvate carboxylases (PEPC, EC4.1.1.31) are encoded by a small mutigene family in plants. Each isoform PEPC is thought to play a specific physiological role. Three isoforms have been reported in C4 plants such as maize [1, 2], sorghum [3] and Flaveria trinervia [4]; the C4-form PEPC involved in C4 photosynthesis, the C3-form PEPC for ...
L.-Y. Dong, T. Masuda, S. Hata, K Izui
openaire   +1 more source

PEPC-Aktivität

Umweltwissenschaften und Schadstoff-Forschung, 1991
Sabine Tietz, Stella Schneider, J. Gill, A. Wild   +3 more
openaire   +1 more source