نتایج جستجو برای: ps has a direct

تعداد نتایج: 13642398  

Background: Acute blood purification (ABP) therapy is used regularly in the clinical setting and reportedly alleviates organ failure associated with severe systemic inflammatory responses, leading to reduced mortality. The present study aimed to determine whether there is a difference in efficacy between polysulfone (PS) membranes, which are currently used regularly in the clinical setting, and...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده ادبیات و زبانهای خارجی 1390

bserved by many teachers that most of the time, mumbling and searching for their intended words, students complain why they have forgotten the words they have learned in the previous semesters. they ask for some new ways that may help them to recall and apply the learned words more efficiently, since as they declare one of the most important skills in foreign language learning is having a g...

B. Natarajan J. Pandiarajan N. Jeyakumaran N. Prithivikumaran,

Porous Silicon (PS) layers have been prepared from p-type silicon wafers of (100) orientation. SEM, XRD, FTIR and PL studies were done to characterize the surface morphological and optical properties of PS. The porosity of the PS samples was determined using the parameters obtained from SEM images by geometric method. The refractive index values of the PS samples as a function of poros...

Journal: :FEBS letters 1998
M D Mamedov K N Gourovskaya I R Vassiliev J H Golbeck Sememov AYu

Photovoltage responses accompanying electron transfer on the acceptor side of photosystem I (PS I) were investigated in proteoliposomes containing PS I complexes from the cyanobacterium Synechococcus sp. PCC 6301 using a direct electrometrical technique. The relative contributions of the F(X) --> F(B) and the F(X) --> F(A) electron transfer reactions to the overall electrogenicity were elucidat...

Journal: :physiology and pharmacology 0
ناصر خدایی naser khodaee dept. of physiology, medical school, shahid beheshti university of medical sciences, tehran, iran مائده قاسمی maedeh ghasemi dept. of physiology, medical school, shahid beheshti university of medical sciences, tehran, iran جواد فحانیک بابایی fahanik-babaei javad dept. of physiology, medical school, shahid beheshti university of medical sciences, tehran, iran رضا صغیری reza saghiri dept. of biochemistry, pasteur institute of iran, tehran, iran افسانه الیاسی afsaneh eliasi dept. of biochemistry, pasteur institute of iran, tehran, iran

introduction: intracellular ph (phi) regulates essentially all aspects of cellular activities. however, it is unknown how endoplasmic reticulum (er) potassium channels sense phi. in this study, we investigate the direct effects of phi on er potassium channels. methods: we used channel incorporation into the bilayer lipid membrane method. l-α-phosphatidylcholine, a membrane lipid, was extracted ...

In this research, firstly polyaniline-zinc oxide (PANI-ZnO) nanocomposite was successfully synthesized by chemical polymerization of aniline in the presence of ZnO nanoparticles and then, 5%, 10% and 15% solutions of PANI–ZnO nanocomposites were mixed with a solution of polystyrene (PS) in tetrahydrofurane (THF) and PANI-PS-ZnO nanocomposites were obtained. The prepared nanocomposites were used...

Journal: :Macromolecular rapid communications 2011
José A Pomposo Alaitz Ruiz de Luzuriaga Iñaki García Agustín Etxeberria Juan Colmenero

Direct observation of the miscibility improving effect of ultra-small polymeric nanoparticles (radius ≈4 nm) in model systems of soft nanocomposites is reported. We have found thermodynamically arrested phase separation in classical poly(styrene) (PS)/poly(vinyl methyl ether) blends when PS linear chains were totally replaced by ultra-small, single chain PS nanoparticles, as determined by therm...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

the issue of curriculum and syllabus evaluation and revision has been in center of attention right from when curriculum came into attention of educational institutions. thus everywhere in the world in educational institutions curricula and syllabi are evaluated and revised based on the goals, the needs, existing content, etc.. in iran any curriculum is designed in a committee of specialists and...

In this paper, a Fredkin gate using photonic-crystal around the 1550 nm telecommunication wavelength is modelled. The proposed structure has a compact footprint compared with previous works of research groups. The proposed structure is based on air holes on silicon substrate. Silicon substrate and air holes have 466 nm and 177 nm radius, respectively. For analyse of the structure Finite-Differe...

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