نتایج جستجو برای: transmission electron microscopy tem

تعداد نتایج: 631869  

2015
Suresh Sagadevan A. Veeralakshmi

Cadmium oxide (CdO) nanoparticles have been prepared by chemical coprecipitation method. The synthesized nanoparticles were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV analysis, and dielectric studies. The crystalline nature and particle size of the CdO nanoparticles were characterized by Powder X-ray diffract...

We report the growth by ion exchange synthesis of ZnS nanoparticles in MCM-41 matrices using Zn (CH3COO)2 and Na2S starting sources. The final product (ZnS/MCM-41) was characterized by X-ray diffraction (XRD) pattern, transmission electron microscopy (TEM), scanning electron microscopy (SEM), infrared spectrometry (IR) and UV-vis spectroscopy. Its crystalline st...

H. Hatami M. Sadeghi, S. L. Sharifi

Zeolite FAU type-Y is one of the most studied framework of all zeolites, and has been used as catalysts for number of reactions in the refinery and petrochemical industry. In this research, nanocrystalline zeolite Y was synthesized by hydrothermal method. The crystal size of zeolite Y is influenced by temperature, aging time, alkalinity, and water content. The synthesized zeolite NaY is identif...

Journal: :international journal of nano dimension 0
s. r. shaffiey young researchers and elite club, islamic azad university, qaemshahr branch, qaemshahr, iran. s. f. shaffiey young researchers and elite club, islamic azad university, qaemshahr branch, qaemshahr, iran. m. ahmadi department of science and food industry, savadkooh branch, islamic azad university, savadkooh, iran.

the nanomaterials have important application in different field of science such as biology and pharmacology, which draws the attention of biologists towards this field of study more than before. as the worldwide mortality rate is high due to the pathogens and especially because of the bacteria associated aeromonas and the antibacterial effect of metal nanoparticles is well known for centuries, ...

Journal: :The Onderstepoort journal of veterinary research 1984
A L Payne D W Verwoerd

A scanning electron microscopy (SEM) and transmission electron microscopy (TEM) study was made of lesions from acute, experimentally induced cases of jaagsiekte. In the SEM study tumour cells were easily identified by the abundant microvilli on their peripheral surface. The SEM study gave further insight into the development of lesions and the spatial relationship of cells involved in jaagsiekt...

2016
Seong Baek Yang Mohammad Mahbub Rabbani Byung Chul Ji Dong-Wook Han Joon Seok Lee Jong Won Kim Jeong Hyun Yeum

The optimum conditions for the fabrication of zein/Ag composite nanoparticles from ethanol/H₂O cosolvents using electrospinning and the properties of the composite were investigated. The zein/Ag nanoparticles were characterized using field-emission scanning electron microscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis. The antibacterial act...

2017
Adrianus C. Laan Antonia G. Denkova

This letter is meant to make scientists aware of the proper application of transmission electron microscopy (TEM) for the assessment of polymeric self-assemblies. Cryogenic (cryo)-TEM should be the method of choice. Here, we show the difference in morphologies observed in the same sample when using cryo-TEM and when using TEM with drying, demonstrating the importance of choosing the proper method.

Journal: :applied biotechnology reports 0
seyed javad davarpanah applied biotechnology research center, baqiyatallah university of medical sciences, tehran, iran ramin karimian vahabodin goodarzi farideh piri

copper sulfate was used as a precursor to prepare cuo nanoparticles in reverse micelles (o/w microemulsion).  this is a technique which allows the preparation of ultrafine metal oxide nanoparticles within the size ranging from 50 to 60 nm. the preparation of nano copper (ii) oxide studied was investigated in the inverse microemulsion system. therefore the nucleation of metal particles proceeds ...

Journal: :journal of sciences, islamic republic of iran 2015
m. karimi a. badiei p. zarabadi-poor

we evaluated the effect of fe/alumina catalyst contained different cadmium contents and two synthesis temperatures on producing carbon nanotubes by chemical vapor deposition of methane as a feedstock.  x-ray powder diffraction (xrd), n2 adsorption-desorption, scanning electron microscopy (sem), transmission electron microscopy (tem), raman spectroscopy and thermogravimetry analysis (tga) were u...

Journal: :journal of the iranian chemical research 0
morteza enhessari department of chemistry, islamic azad university, naragh branch, naragh, iran salah khanahmadzadeh department of chemistry, faculty of science, islamic azad university, mahabad branch,, mahabad, iran keyvan ozaee young researchers club, islamic azad university, naragh branch, naragh, iran

pure barium zirconate nanopowders were successfully prepared in wet-chemistry synthesismethod, using barium stearate and tetra-n-butyl zirconate as ba, zr sources and stearic acid ascomplexing reagent. the gel was calcined at 800 and 900 °c in air. results of thermal analysisare given, including both dtg and tg. fourier transform infrared spectrometry (ftir), x-raydiffraction (xrd), transmissio...

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