نتایج جستجو برای: mo

تعداد نتایج: 31308  

ژورنال: :تابش و فناوری هسته ای 0
سمیرا رازقندی دانشجوی دکتری، دانشگاه حکیم سبزواری، سبزوار علی اصغر مولوی استاد گروه فیزیک، دانشگاه حکیم سبزواری، سبزوار

ماموگرافی با اشعه x یکی از روش های پر کاربرد در تشخیص سرطان پستان می باشد. به دلیل حساسیت بافت پستان، میزان دُز دریافتی بیمار در ماموگرافی اهمیت ویژه ای دارد. هدف از مطالعه حاضر، بررسی عوامل موثر در میزان دُز جذبی و مقایسه میزان دُز دریافتی برای شرایطی که دستگاه ماموگرافی شامل ترکیب هدف-فیلتر mo-moیا w-rh باشد. در این پژوهش، به کمک کد mcnpx، ساختار تیوپ اشعه x دستگاه ماموگرافی شبیه سازی شده و طیف ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
ahmad tavasoli saba karimi hamideh nikookar hamzeh fadakar

an extensive study of higher alcohols synthesis (has) from syngas using alkalized mos2 catalysts supported on carbon nanotubes (cnts) is reported. up to 30wt.% of mo and 8wt.% k are added to the cnts by impregnation method. the catalysts were characterized by different methods and the performance of the catalysts was assessed in a micro-reactor. tem images showed that most of the metal particle...

The activity of different transitional metals over modified H-ZSM-5 catalysts for methane conversion to aromatics was compared. The first group of catalysts was Mo-impregnated H-ZSM-5 zeolites with 1, 3 and 6 wt% of Mo. The second group was M(3 wt%)- impregnated H-ZSM-5 (M: Ag, Cd, Cr, Mo, Zn and Mn). The catalytic activity of the first group was investigated at 600, 700 and 800 °C and gas hour...

Journal: Nanochemistry Research 2016

In the present study, a new chemically modified carbon paste electrode (CPE) is constructed for rapid, accurate, simple, highly sensitive, and selective determination of Mo (VI) using differential pulse voltammetry. The electrode was prepared using magnetic nickel zinc ferrite nanocomposite (Ni0.5Zn0.5Fe2O4), as the modifier in CPE (Ni0.5Zn0.5Fe2O4/CPE). Mo (VI) was determined after preconcentr...

Journal: :Tribology International 2021

MoDTC molecular additives reduce friction in boundary lubricated steel-steel contacts through formation of MoS2 sheets. The chemical pathway from to is investigated for optimizing formation. Our experiments show that a molecule containing sulfur only its thiocarbamate ligands forms sheets during friction, demonstrating the presence peripheral can be sufficient provide required source. This not ...

Jian zhang Li Jun bo Zhong, Sheng tian Huang Wei Hu Yan Lu

Oxidation of Methyl Orange (MO) solution in potassium peroxydisulfate (KPS) homogeneous reaction system without UV irradiation was investigated. The result shows that decolorization of MO increases as the dosage of K2S2O8 increases. The kinetic results demonstrate that the decolorization reaction is a pseudo first-order reaction when the concentration of MO ...

Optimal Reactive Power Dispatch (ORPD) is a multi-variable problem with nonlinear constraints and continuous/discrete decision variables. Due to the stochastic behavior of loads, the ORPD requires a probabilistic mathematical model. In this paper, Monte Carlo Simulation (MCS) is used for modeling of load uncertainties in the ORPD problem. The problem is formulated as a nonlinear constrained mul...

Ahmad Tavasoli, Hamideh Amirfirouzkouhi Mokhtar Babatabar Saba Karimi, Somayeh Taghavi Zahra Zolfaghari

An extensive study of Higher Alcohol Synthesis (HAS) from synthesis gas using cobalt (Co) promoted alkalized MoS2 catalysts supported on Carbon NanoTubes (CNTs) is reported. Up to  5wt.% of Co is added to the 15wt.% Mo-wt.%K/ CNTs by incipient wetness impregnation method. Most of the metal particles were homogeneously distributed inside the tubes and the rest on the oute...

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