نتایج جستجو برای: sem edax
تعداد نتایج: 64917 فیلتر نتایج به سال:
Surfactant doped polyaniline was synthesized in the aqueous solution of aniline and anionic surfactant of perfluorooctanoic acid (PFO) by chemical synthesis using potassium peroxy disulphate as an oxidant by varying the aniline to surfactant ratio. The solubility of the chemically prepared surfactant doped polyaniline (PANI) was ascertained and it showed good solubility in dimethyl sulfoxide (D...
The reaction of carbon monoxide and dichlorine over an activated (Donau Supersorbon K40) to produce phosgene is examined. Individual reagent product breakthrough measurements the clean catalyst establish magnitude adsorption coefficients (K) follow trend: KCl2 > KCOCl2 >> KCO. Chlorine indicate a distribution active sites that conforms two-site model, with classified according their enthalpy ad...
In this work, Cladding was done on SS316L alloy through the CMT process using Stellite-6 filler wire. 31 experiments were at different welding conditions as per CCD matrix. The cladding specimens characterized by macro and micro-study, Vickers microhardness evaluation corrosion resistance analysis. An optical microscope, SEM-EDAX, XRD used to predict structural characterizations, presence distr...
مقدمه: افزایش سطوح نفوذناپذیر علاوه بر افزایش حجم و پیک جریان، سبب افزایش نوع و مقدار آلاینده‌ها در رواناب شهری می‌شود. رواناب آلوده اثرات نامطلوب بسیاری را بر محیط زیست و آدمی می‌گذارد. هدف اصلی این پژوهش، بررسی کارایی شن پوشیده شده با اکسید منگنز همراه با اعمال میدان مغناطیسی در تصفیه رواناب‌های شهری بود. روش‌ها: در این مطالعه از یک ستون پلکسی گلاس حاوی شن پوشش داده شده با اکسید منگنز استفا...
In this article, bulk and thin film samples of strontium ferrite have been studied. Due to the high electrical resistivity in strontium ferrite, energy loss due to eddy currents reduces and because of this, it can be used in high frequency magnetic circuits. On the other hand, strontium ferrite has attracted much attention as a permanent magnet. At first, we study the preparation process of b...
Mass Concentrations and Elemental Composition of Urban Atmospheric Aerosols in Addis Ababa, Ethiopia
Aerosol samples were collected from 22 February 2008 to 15 April 2008 and 17 June 2008 to 23 July 2008 in urban and peri-urban areas of Addis Ababa, Ethiopia, with the aim to assess the spatial and temporal aspects of total suspended particulate (TSP) and particulate matter with aerodynamic diameter less than 10 μm (PM10) and their composition in terms of metallic elements. Sixty six filter sam...
در این پژوهش سنتز و شناسایی مزو-5، 10، 15، 20-تتراکیس(بنزیل آمین) پورفیریناتو منگنز(iii) استات؛[mn(tbap)oac] که به صورت شیمیایی بر روی کربن فعال نشانده شده،تهیه شده است. این کاتالیزور نا همگن که [mn(tbap)oac@ac] نامگذاری می شود، با روش های طیف بینی مختلف از جمله طیف بینی مادون قرمز (ft-ir)، تصویر میکرو سکوپ الکترونی روبشی (sem) و الگوی تفرق اشعه ی (edax) x شناسایی شده است. این کاتالیزور نا هم...
The main purpose of this study was to fabricate carbon nanotubes (CNTs) reinforced zirconnium yttrium coatings on boiler tube steel and investigate the microstructural mechanical properties these coatings. Plasma sprayed conventional ZrO2-Y2O3, ZrO2-Y2O3 1 wt.% CNT 4 were prepared deposited successfully material T-91 (ASTM SA-213) by plasma thermal spray technology. Microhardness, porosity, XR...
Abstract The detection of nitrite as a challenging compound in food industries has always been necessity. To this purpose, herein, two transition metal oxide‐based nanocatalysts, NiO–Co 3 O 4 (NC) and its reduced graphene hybridized form, –rGO (NCR), are synthesized by hydrothermal method characterized X‐ray diffraction, Raman spectroscopy, scanning electron microscope (SEM) images, energy disp...
AIM To report the hydration mechanism of white mineral trioxide aggregate (White MTA, Dentsply, Tulsa Dental Products, Tulsa, OK, USA). METHODOLOGY The chemical constitution of white MTA was studied by viewing the powder in polished sections under the scanning electron microscope (SEM). The hydration of both white MTA and white Portland cement (PC) was studied by characterizing cement hydrate...
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