نتایج جستجو برای: ray diffraction xrd

تعداد نتایج: 341829  

Journal: :journal of the iranian chemical research 0
parvain gharbani department of chemistry, islamic azad university, ahar branch, ahar, iran ali mehrizad, department of chemistry, islamic azad university, ahar branch, ahar, iran samad motameni tabatabii department of chemistry, islamic azad university, ahar branch, ahar, iran

the preparation of nano-sized tio2 by titanium tetraisopropoxide (ti(oipr)4) via sol-gelmethod using acid as a catalyst is investigated and the optimized conditions concerning theproportional amount of acid, water, alcohol is established by xrd and sem. the effect ofcalcination temperature on phase transformation of tio2 (rutile, anatase and brookite) wasdetermined by xrd. the smallest grain si...

Journal: :international journal of nano dimension 0
m. r. khanlary physics department of imam khomeini international university, qazvin, iran s. ghammamy chemistry department of imam khomeini international university, qazvin, iran m. ghomi gilvaee physics department of imam khomeini international university, qazvin, iran

in this research calcium fluoride nanoparticles and its different amount of cerium ion dopant (5%and 10%) were prepared. the mentioned nanoparticle were studied by fourier transform infrared spectroscopy (ftir) , x-ray diffraction (xrd), absorption and photoluminescence spectra (pl) and scanning electron microscopy (sem). the xrd patterns indicate a typical cubic fluorite structure and no other...

Journal: :iranian journal of radiation research 0
a. maziar department of medical physics, school of medicine, isfahan university of medical sciences, isfahan, iran d. shahbazi-gahrouei department of medical physics, school of medicine, isfahan university of medical sciences, isfahan, iran m.b. tavakoli department of medical physics, school of medicine, isfahan university of medical sciences, isfahan, iran v. changizi department of medical physics, tehran university of medical sciences, tehran, iran z. ghasemian department of medical physics, school of medicine, isfahan university of medical sciences, isfahan, iran

background: an early diagnosis of breast cancer relates directly to an accurate treatment plan and strategy. early detection of breast cancer before its development would be a significant reduction of morbidity and mortality rates. the aim of this preliminary study is to investigate the sensitivity of wide angle x-ray diffraction (waxrd) method on women hair samples of healthy and breast cancer...

Journal: :global journal of environmental science and management 0
s. afshar department of civil engineering, science and research branch, islamic azad university, tehran, iran b. saghafian department of civil engineering, science and research branch, islamic azad university, tehran, iran h.r. vosoughifar department of civil engineering, islamic azad university, tehran south branch, tehran, iran

the present study was carried out to determine the possible origins of sediments entering taleghan dam in northern part of iran, in order to avoid further sedimentation and helping in extension of the useful life of the proposed dam. this was performed by xrd analysis. to do so, first of all, sediment sampling points were positioned along the taleghan river. the collected samples, after coding,...

Journal: :international journal of nano dimension 0
s. rostamzadehmansoor department of chemistry, science and research branch, islamic azad university, tehran, iran. m. s. sadjadi department of chemistry, science and research branch, islamic azad university, tehran, iran. k. zare department of chemistry, science and research branch, islamic azad university, tehran, iran.

sio2-coated cobalt ferrite (cofe2o4) nanoparticles were obtained by the hydrolysis of tetraethylorthosilicate in the presence of cofe2o4 nanoparticles in co-precipitation. the effects of sio2coating on the magnetic properties of cofe2o4 nanoparticles were investigated. the structural, morphological and magnetic properties of as-prepared sample were characterization by x-ray diffraction (xrd), f...

Journal: :int. journal of mining & geo-engineering 2015
golnaz jozanikohan fereydoun sahabi gholam hossain norouzi hossein memarian

clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...

2018
Stina Holmgren Rondahl Fabien Pointurier Linnea Ahlinder Henrik Ramebäck Olivier Marie Brice Ravat François Delaunay Emma Young Ned Blagojevic James R. Hester Gordon Thorogood Aubrey N. Nelwamondo Tshepo P. Ntsoane Sarah K. Roberts Kiel S. Holliday

This work presents the results for identification of chemical phases obtained by several laboratories as a part of an international nuclear forensic round-robin exercise. In this work powder X-ray diffraction (p-XRD) is regarded as the reference technique. Neutron diffraction produced a superior high-angle diffraction pattern relative to p-XRD. Requiring only small amounts of sample, µ-Raman sp...

2018
Hongjia Zhang Tan Sui Enrico Salvati Dominik Daisenberger Alexander J G Lunt Kai Soon Fong Xu Song Alexander M Korsunsky

High energy 2D X-ray powder diffraction experiments are widely used for lattice strain measurement. The 2D to 1D conversion of diffraction patterns is a necessary step used to prepare the data for full pattern refinement, but is inefficient when only peak centre position information is required for lattice strain evaluation. The multi-step conversion process is likely to lead to increased error...

Journal: :international journal of nano dimension 0
z. shokri aghbolagh department of chemistry, payame noor university, abhar, zanjan, iran. a.r. mahjoub department of chemistry, faculty of science, tarbiat modares university, tehran, iran. sh. ghammamy department of chemistry, faculty of science, imam khomeini international university, qazvin, iran.

in this work, sol-gel processing was used to synthesize the fluorohydroxyapatite (nano-fha, ca10(po4)6(oh)2−xfx) nanopowders. the advantages of the sol-gel method over other methods are precise control of composition, low processing temperature, and better homogeneity. calcium nitrate tetrahydrate, phosphorous pentoxide and tetrabuthylammonium fluoride were used, respectively, as p, ca, and f p...

Journal: :Biophysical journal 2003
Carlo Meneghini Maria Chiara Dalconi Stefania Nuzzo Settimio Mobilio Rudy H Wenk

Bioapatite, the main constituent of mineralized tissue in mammalian bones, is a calcium-phosphate-based mineral that is similar in structure and composition to hydroxyapatite. In this work, the crystallographic structure of bioapatite in human fetuses was investigated by synchrotron radiation x-ray diffraction (XRD) and microdiffraction ( micro -XRD) techniques. Rietveld refinement analyses of ...

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