نتایج جستجو برای: sem edx
تعداد نتایج: 66382 فیلتر نتایج به سال:
زمینه و هدف: در بررسی ذرات معلق هوا علاوه بر شاخصهای شیمیایی، ویژگیهای فیزیکی آنها نیز در آلودگی محیط زیست اهمیت ویژه ای دارد. لذا هدف این مطالعه، ترکیب ریخت شناسی و کانی شناختی ذرات pm2.5 در هوای منطقه دوازده شهر تهران با تکیه بر تصاویرآنالیزی edx - sem وآنالیزهای xrd میباشد. روش کار: در مطالعه حاضر نمونههای ذرات pm2.5 از هوای محدوده بیمارستان سینای تهران توسط frmomnitmambient air sampler جمع...
The aim of this study was to evaluate the effect of rosin upon fixing boron in Styrax tonkinensis (Piere) wood treated with mixtures of 3% boric acid and 1% rosin sizing agent. After treatment, wood samples were also analyzed by scanning electron microscope observation and energy-dispersive X-ray spectroscopy (SEM-EDX). The results showed that all boron-rosin formulations impregnated Styrax ton...
the Corrosion inhibition of mild steel in 1 M HCl has been investigated using three dendrimers by means of gravimetric, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, scanning electron microscopy (SEM) and energy dispersive Xray spectroscopy (EDX) techniques. Results showed that inhibition efficiency increases with increasing concentration of dendrimers. Among the s...
The SEM is especially useful when combined with Energy Dispersive X-ray spectroscopy (EDX), which can be performed in the microscope, enabling very small areas of the sample to be analyzed for their elemental composition. One disadvantage of the SEM approach is related to its high resolution. Only a very small area can be analyzed and the fracture pattern can rapidly become very complex to inte...
PURPOSE Calcium-silicate cements have been recently proposed for application in dentistry as root-end filling and root-perforation repair materials. The aim of this study was to investigate the effect of ageing of experimental calcium-silicate cements on the chemistry, morphology and in vitro bioactivity of the surface, as well as on osteoblast viability and proliferation. METHODS Two experim...
The microstructure and micro-composition of ZnO thin films doped with Al, deposited on Si/SiO2 substrates by sol-gel method were investigated by scanning and high resolution transmission electron microscopy and related energy dispersive X-ray analyses (SEM-EDX, STEM-HRTEM/EDX). Thin films of ZnO were prepared by deposition of 1-10 successive layers with 0.5 at.% and 5 at.% Al concentrations. Th...
OBJECTIVE The purpose of this study was to investigate the morphological and atomic changes on the root surface by stereoscopy, field emission-scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectroscopy (SEM-EDX) after erbium, chromium:yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser irradiation in vitro. SUMMARY BACKGROUND DATA There have been few reports on morpholo...
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