نتایج جستجو برای: scanning electron microscopy )sem)

تعداد نتایج: 532423  

Journal: :مجله بهداشت محیط و توسعه پایدار 0
mehdi mokhtari assistant professor, environmental science and technology research center, department of environmental health engineering, school of public health, shahidsadoughi university of medical sciences, yazd, iran. negarjafari jafari phd student, environmental research center, faculty of public health, isfahan university of medical sciences, isfahan, iran. asghar ebrahimi assistant professor, environmental science and technology research center, department of environmental health engineering, school of public health, shahidsadoughi university of medical sciences, yazd, iran. amir mohammadi phd student. environmental science and technology research center, department of environmental health engineering, school of public health, shahidsadoughi university of medical sciences, yazd, iran. ali abdolahnejad phd student. environmental science and technology research center, department of environmental health engineering, school of public health, shahidsadoughi university of medical sciences, yazd, iran. yaghob hajizadeh assistant professor, environmental research center,department of environmental health engineering, faculty of public health, isfahan university of medical sciences, isfahan, iran.

introduction: today, have been approved scientifically relationship between presence of asbestos fibers in the human respiratory area and malignant diseases such as lung advanced fibrosis (asbestosis), gastrointestinal, lung and laryngeal cancers. the aim of this study was the determination of asbestos fibers concentration in yazd city’s air in the summer of 2015. methods: this is a descriptive...

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Journal: :international journal of nano dimension 0
a. pourahmad department of chemistry, guilan science and research branch, islamic azad university, guilan, iran.

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 structure and morphology was studie...

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Journal: :iranian endodontic journal 0
vahid zand hadi mokhtari mehrdad lotfi saeed rahimi aydin sohrabi sina badamchi zadeh

introduction: the aim of this in vitro study was to evaluate the effect of an experimental irrigation solution, containing two different concentrations of papain, tween 80, 2% chlorhexidine and edta, on removal of the smear layer. methods and materials: thirty-six single-rooted teeth were divided into two experimental groups ( n =12) and two positive and negative control groups of six. the cana...

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389
سمیرا مسلمی, شادپور ملک پور, کاظم کرمی,

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

15 صفحه اول
Journal: :galen medical journal 0
abolfazl mehdizadeh kashi minimally invasive surgery, endometriosis research center, hazrat-e rasool-e-akram hospital, iran university of medical science (iums), tehran, ir-iran kobra tahemanesh minimally invasive surgery, endometriosis research center, hazrat-e rasool-e akram hospital, iran university of medical science (iums), tehran, ir-iran. shahla chaichian mit research center of tmsb, iau, minimally invasive surgery, endometriosis research center, iran university of medical sciences (iums), tehran, iran mohammad taghi joghataei cellular and molecular research center, faculty of medicine, iran university of medical sciences (iums), tehran, iran. fateme moradi cellular and molecular research center, faculty of medicine, iran university of medical sciences (iums), tehran, iran. seyed mohammad tavangar department of pathology, shariati hospital, tehran university of medical sciences (tums),tehran, ir-iran

in this article we review the application and procedures involved in scanning electron microscope (sem) to observe biological and live tissues through using sem at high resolution. we discuss practical methods for optimizing tissue preservation to achieve the two principal goals of biological specimen preparation: (a) preserving biological structures as close to their living configuration as po...

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پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده مهندسی شیمی 1393
الناز منوچهری, محسن قربانی,

در این پژوهش نحوه ساخت نانوکامپوزییت eva/ag و اثر ضد میکروبی آن در درصدهای مختلف نانو ذره نقره مورد بررسی قرار گرفته است.نانوکامپوزیت حاصل از نطر شکل شناختی ، اندازه ذرات، ساختمان شیمیایی ، با استفاده از تستهای sem(scanning electrou microscopy)،tem (transmission electron microscope) ، xrd (x-ray fluorescence spectroscopy) ،ftir (fourier transform infrared spectroscopy) مورد ارزیابی قرار گرفت. د...

Journal: :journal of physical & theoretical chemistry 2013
morrasa amani malkeshi karim zare

in this research, the effect of catalyst type on the cnts synthesis was investigated. the carbonnanotubes (cnts) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using thermal chemical vapor deposition (tcvd) method. the catalysts have theimportant role for the growth carbon nanotubes (cnts). acetylene gas (c2h2) diluted by nh3 wasused as the reac...

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Journal: :international journal of nano dimension 0
p. khalid department of biotechnology, p a college of engineering, vtu. mangalore, karnataka, india. v.b. suman department of physiology, manipal university. kasturba medical college. mangalore, karnataka, india. s. shameema department of physiology, manipal university. kasturba medical college. mangalore, karnataka, india. n. a. vinodini department of physiology, manipal university. kasturba medical college. mangalore, karnataka, india. r. pai. shela department of physiology, manipal university. kasturba medical college. mangalore, karnataka, india. pratik k. chattergee department of physiology, manipal university. kasturba medical college. mangalore, karnataka, india.

in recent years, it has become evident that it is necessary to systematically and accurately define particle characteristics in order to understand the potential toxicity of nanoparticles to biological systems. the properties that need to be emphasized are size, shape, dispersion, doping, aggregation, functionalization, physical and chemical properties, surface area, and surface chemistry. rout...

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Journal: :international journal of nano dimension 0
z. rahmani department of chemistry, takestan branch, islamic azad university , takestan ,iran. sh. ghammamy department of chemistry, faculty of science, imam khomeini international university, qazvin, iran. m. pourheravy department of chemistry, faculty of science, payam noor university, abhar, iran.

synthesis, identification and thermal behavior studies of nanoparticles cobalt (ii) bromide has been studied in this research. cobalt (ii) bromide was synthesized by planetary high-energy ball mill. the general formula of this compound is cobr2.6h2o. the synthesized nanoparticles were characterized by fourier transform infrared spectroscopy and also size and structure of synthesized nanoparticl...

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پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390
لیلا کریمخانی, عاطفه تمدن, بهروز اکبری,

abstract in this study, we synthesized a novel template polymer by using methacrylic acid (mma) as functional monomer, ethylene glycol dimethacrylate(egdma) as cross linker, 2,2-azobisisobutyronitrile (aibn) as initiator and olanzapine as targeted molecule in the presence of chloroform and acetonitrile as solvent. the products have been characterized and confirmed by (chn)elemental analysis,...

15 صفحه اول

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