نتایج جستجو برای: catalytic effect

تعداد نتایج: 1710805  

2007
Li Xing Jieshan Qiu

Ni-doped carbon aerogel catalysts were prepared through sol-gel polycondensation of furfural with resorcinol in the presence of nickel nitrate salts, followed by drying at ambient pressure and then carbonization in N2. The catalysts were used for catalytic transfer hydrogenation of aromatic nitro compounds with propan-2-ol as hydrogen donor and KOH as promoter, and have been found to exhibit ex...

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

هدف این مطالعه تعیین کردن این مساله است که آیا فراگیران فارسی زبان قادر به تطبیق پارامتری ضمیر موصولی that در جملات ساده و پیچیده ی انگلیسی در سایه اصل دستور جهانی هستند یا خیر. به علاوه نقش جنسیت در رابطه با آزمون تشخیص درستی یا نادرستی جملات دستوری مورد بررسی قرار گرفت. داده ها از 54 دانشجوی فراگیر زبان انگلیسی در دانشگاه فردوسی مشهد گردآوری شد. شرکت کنندگان در آزمون شامل 28 زن (51.85 درصد)و ...

Journal: :Journal of colloid and interface science 2011
Nashaat N Nassar Azfar Hassan Pedro Pereira-Almao

This study investigates the effect of surface acidity and basicity of aluminas on asphaltene adsorption followed by air oxidation. Equilibrium batch adsorption experiments were conducted at 25°C with solutions of asphaltenes in toluene at concentrations ranging from 100 to 3000 g/L using three conventional alumina adsorbents with different surface acidity. Data were found to better fit to the F...

2014
Katherine V. Clark-Knowles Danielle Dewar-Darch Karen E. Jardine Michael W. McBurney

The protein deacetylase SIRT1 is involved in the regulation of a large number of cellular processes that are thought to be required for cancer initiation and progression. Both SIRT1 activity and tumorigenesis can be influenced by dietary fat and polyphenolics. We set out to determine whether dietary modulations of tumorigenesis are mediated by SIRT1 catalytic functions. We introduced a mammary ...

2016
R. Manabe S. Okada R. Inagaki K. Oshima S. Ogo Y. Sekine

Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO2 catalyst in an electric field, thanks to the surface protonics. Kinetic analyses demonstrated the synergetic effect between catalytic reaction and electric field, revealing strengthened water pressure dependence of the reaction rate when applying an electric field, with one-third the apparent ...

ژورنال: مواد پرانرژی 2016

Aluminum powder is a common ingredient in energetic materials. Reactivity of this metal can be improved by reducing the particle size, due to their larger surface/volume ratio. In this research, the effects of using nano-structured aluminum powder investigated on physical, thermal, mechanical and explosive characteristics of an HMX-based PBX. The results indicated that the experimental density ...

باقری, مرضیه, روشنایی, قدرت الله, شکوهی, رضا, صید محمدی, عبدالمطلب, عسگری, قربان,

Background and purpose: Using catalysts to enhance the efficiency of the ozonation process (known as catalytic ozonation process) has received much attention in recent years. This study aimed at examining the overall feasibility of using catalysts ozone as catalyst in ozonation process for decolorization and mineralization of a real textile wastewater in presence of persulfate. Materials and...

Journal: :Small 2023

Superparamagnetic Core/Catalytic Shell Heterostructures In article number 2205665, Cailei Yuan and co-workers design successfully prepare electrochemical-reconstructed NiFe/NiFeOOH core/shell nanoparticles confined in highly conductive amorphous carbon matrix. Benefiting from the unique superparamagnetic NiFe/catalytic NiFeOOH heterostructure, their oxygen evolution reaction performance is impr...

2015
Acácio Nobre Mendes Maria Filipa Ribeiro Carlos Henriques Patrick Da Costa

In the present work, the effect of several parameters involved in the preparation of PdCe-HMOR catalysts active for NOx selective catalytic reduction with methane (NOx CH4-SCR) was studied. Results show that the catalytic performance of Pd-HMOR is better when palladium is introduced by ion-exchange, namely at room temperature. It was also shown that Pd loading does not influence the formation o...

Journal: :Inorganic chemistry 2015
Naoya Onishi Shaoan Xu Yuichi Manaka Yuki Suna Wan-Hui Wang James T Muckerman Etsuko Fujita Yuichiro Himeda

The catalytic cycle for the production of formic acid by CO2 hydrogenation and the reverse reaction have received renewed attention because they are viewed as offering a viable scheme for hydrogen storage and release. In this Forum Article, CO2 hydrogenation catalyzed by iridium complexes bearing sophisticated N^N-bidentate ligands is reported. We describe how a ligand containing hydroxy groups...

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