نتایج جستجو برای: xrd

تعداد نتایج: 25885  

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2000

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2005

Journal: :Journal of Environmental & Analytical Toxicology 2018

Journal: :Inorganic chemistry 2006
Rajendra Shakya Paul H Keyes Mary Jane Heeg Azzam Moussawel Paul A Heiney Claudio N Verani

A new ligand containing long alkyl (octadecyl) chains was used to obtain the mesogenic complex [L2Cu4(mu4-O)(OAc)4].EtOH (1). This complex was thoroughly characterized and had its molecular structure solved by X-ray diffraction (XRD). Mesomorphic properties were demonstrated by means of polarized microscopy, differential scanning calorimetry, and XRD.

2012
Roberta Cristina Novaes Reis Corrales Fabiana Magalhães Teixeira Mendes Clarissa Cruz Perrone Celso Sant’Anna Wanderley de Souza Yuri Abud Elba Pinto da Silva Bon Viridiana Ferreira-Leitão

BACKGROUND Previous studies on the use of SO2 and CO2 as impregnating agent for sugar cane bagasse steam treatment showed comparative and promising results concerning the cellulose enzymatic hydrolysis and the low formation of the inhibitors furfural and hydroxymethylfurfural for the use of CO2 at 205°C/15 min or SO2 at 190°C/5 min. In the present study sugar cane bagasse materials pretreated a...

2009
Dodd Gray Adam McCaughan Bhaskar Mookerji

We analyze graphene and some of the carbon allotropes for which graphene sheets form the basis. The real-space and reciprocal crystalline structures are analyzed. Theoretical X-ray diffraction (XRD) patterns are obtained from this analysis and compared with experimental results. We show that staggered two-dimensional hexagonal lattices of graphite have XRD patterns that differ significantly fro...

ژورنال: :پژوهش فیزیک ایران 0
سید ابراهیم موسوی قهفرخی s e mousavi ghahfarokhi physics department, shahid chamran university of ahvaz, ahvaz, iranگروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز زهرا عراقی رستمی z araghi rostami physics department, shahid chamran university of ahvaz, ahvaz, iranگروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز ایرج کاظمی نژاد i kazeminezhad physics department, shahid chamran university of ahvaz, ahvaz, iranگروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز

در این تحقیق، نانوذرات هگزافریت سرب (pbfe12o19) با استفاده از روش سل- ژل تهیه شد. تأثیر ph بر خواص ساختاری و مغناطیسی نانوذرات pbfe12o19 مورد مطالعه قرار گرفت. در این مقاله تأثیر تغییرات ph محلول بر اندازه و شکل نانوذرات، خواص ساختاری و خواص مغناطیسی نمونه ها مورد بررسی قرار گرفته است. بنابراین نمونه هایی با ph های مختلف 8 و 7، 6، 5، 3، 8/1ph =  تهیه شدند. سپس ژل خشک هر شش نمونه در دما و زمان ب...

Journal: :journal of sciences, islamic republic of iran 2014
m. yarestani a.d. khalaji a. rohani d. das

cobalt oxide (co3o4) nanoparticleshave been synthesized by hydrothermal method using mixture of cobalt(ii)chloride, triton x-100 and koh in an autoclave at 180 °c for 6 h followed by heating at 400 ºc for 3 h in air. the product have been characterized by fourier transform infrared (ft-ir), uv-vis spectroscopy, powder x-ray diffraction (xrd), scanning electron microscopy (sem) and transmission ...

Journal: :international journal of nano dimension 0
a. a. dehno khalaji department of chemistry, faculty of science, golestan university, gorgan, iran. f. malekan department of chemistry, faculty of science, golestan university, gorgan, iran.

in this paper, we used tetranuclear copper (ii) schiff base complexes, [cu4 (μ-sal2hn) (μ-n3)2(n3)2] (1) and [cu4 (μ-salophen) (μ1, 1-n3)2(n3)2] (2), as new precursor in solid-state thermal decomposition for the synthesis of cuo nanoparticles. the crystallinity, purity and morphology of the cuo nanoparticles were characterized by fourier transform infrared (ft-ir), x-ray diffraction (xrd) and s...

2013
Dongzhou Zhang Jennifer M. Jackson Bin Chen Wolfgang Sturhahn Jiyong Zhao Jinyuan Yan Razvan Caracas

[1] The behavior of synthetic-powdered 57Fe-enriched enstatite (Mg0.980Fe0.020(5))(Mg0.760Fe0.240)Si2O6 has been explored by X-ray diffraction (XRD) and nuclear resonant inelastic X-ray scattering (NRIXS). The Pbca-structured enstatite sample was compressed in fine pressure increments for our independent XRD measurements. One structural transition between 10.1 and 12.2 GPa has been identified f...

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