نتایج جستجو برای: doping (additive)

تعداد نتایج: 93371  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم پایه 1390

در این تحقیق، ساختار لیزرهای نقطه کوانتومی، مشخصه ها، نواقص، و همچنین فاکتور های محدود کننده سرعت مدولاسیون بالا و تکنولوژی های کلیدی برای بهبود عملکرد آن بیان می شوند. با بررسی اثر پهن شدگی گرمایی حفره ها که ناشی از جرم موثر سنگین ، حفره ها در نوار ظرفیت لیزر های نقطه کوانتومی است ، نشان می دهیم که یکی از عوامل مهم در محدود کردن سرعت مدولاسیون لیزرهای نقطه کوانتومی ، نزدیکی بیش از اندازه تراز ...

Journal: :Solar RRL 2021

Non-fullerene-based organic solar cells (OSCs) have recently proven to perform with efficiencies above 18%. This is an important milestone for one of the most promising technologies in fields flexible and transparent/semitransparent photovoltaics. However, stability OSCs still a challenging issue meet industry requirements. Herein, several devices IT-4F:PM6 as active layer without 1,8-Diiodooct...

Journal: :Anais da Academia Brasileira de Ciencias 2016
Neha Sharma Savita Jandaik Sanjeev Kumar

Combination therapy of antibiotics and nanoparticles can be used against multi drug resistant microorganisms. Nanoparticles (NPs) have been reported to show antimicrobial activity. The antimicrobial activities of doped ZnO nanoparticles (ZnO NPs) were studied against fungi, gram-positive and gram-negative bacteria using the standard microdilution method. The interaction between the nanoparticle...

Journal: :علوم زیستی ورزشی 0
فرزین حلبچی دکتری، استادیار گروه پزشکی ورزشی دانشگاه علوم پزشکی تهران علیرضا استقامتی دانشیار گروه داخلی دانشگاه علوم پزشکی تهران محمدعلی منصورنیا دستیار اپیدمیولوژی

nowadays, doping is an intricate dilemma for athletes. wrestling is the domestic, national and popular sport in iran. meanwhile, the prevalence of drug abuse in wrestling is high due to its power-demanding nature. so, we decided to evaluate the knowledge of club wrestlers of tehran about doping and their estimates of current prevalence in the country. in a cross sectional study, 426 wrestlers w...

B. Khodadadi M. Sabeti P. Aberomand Azar S. Moradi S. Raeis Farshid

Recently, TiO2 has been widely used as a photocatalyst for degradation of environmental pollutants. In the present study, the advantage of metal doping onto TiO2 for enhanced photocatalitic activity has been investigated. Copper-Titanium dioxide nanocomposites were prepared by the sol-gel method in the presence of Carboxy Methyl Cellulose (CMC), Pectin, and Poly Ethylene Glycol (PEG) as additiv...

Journal: :مجله دانشگاه علوم پزشکی کرمانشاه 0
leyla pasharavesh assistant professor in biostatistics in kermanshah university of medical sciences marziyeh ramandi assistant professor in biostatistics in kermanshah university of medical sciences sepideh khoshboo assistant professor in biostatistics in kermanshah university of medical sciences mansour rezaee associated professor in nephrology in tehran university of medical sciences. samina rezvani assistant professor in biostatistics in kermanshah university of medical sciences mohammad reza abbasi associated professor in nephrology in tehran university of medical sciences.

introduction: today sport is one of the important social criterion and athletes are trying to be a champion. therefore, there is an increase in misuse of doping agents especially anabolic-androgenic steroid. this study was carried out to determine the prevalence of the doping agents' abuse among male bodybuilders' and to access their knowledge about their side effects in kermanshah gymnasiums i...

Journal: :The journal of physical chemistry. B 2010
Hyo Joong Lee Joowook Lee Su-Moon Park

[Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)] (PEDOT:PSS, Baytron P) composite films were prepared under various conditions and their conductivities were studied by the current-sensing atomic force microscopy (CS-AFM) technique. Topographic and current images of pristine and additive-treated PEDOT:PSS as well as electrochemically synthesized PEDOT films were obtained in nanoscale us...

Journal: :Dalton transactions 2016
Ryan D Desautels Michael P Rowe John W Freeland Michael Jones Johan van Lierop

FeCo nanoparticles (4 ± 1 nm), encapsulated by SiO2, were synthesized with and without a 2% (atomic ratio) vanadium doping. The impact from the presence of vanadium, an additive often used in the bulk to alter both physical and mechanical properties, on the nanomagnetism was probed by element-specific X-ray spectroscopy and magnetometry techniques. While the nanostructure was unaffected by the ...

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