نتایج جستجو برای: based nanoparticles

تعداد نتایج: 3023409  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده شیمی 1389

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1392

in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
mahdi kamali sayed ali akbar ghorashi mohammad ali asadollahi,

a method for the controllable synthesis of silver nanoparticles based on a complexing agent method was developed. citric acid was used as a complexing agent. the effect of ph (1.6 to 5.17) on the size and net height (as obtained from xrd analyses) of silver nanoparticles was investigated. the nanoparticles (10 to 40 nm) were characterized using xrd, tem, sem, edx, uv-vis spectroscopy and tg/dtg...

Journal: :international journal of nano dimension 0
h. r. azimi department of physics, masjed-soleiman branch. islamic azad university (i.a.u), masjed-soleiman, iran. r. taheri department of physics, masjed-soleiman branch. islamic azad university (i.a.u), masjed-soleiman, iran.

an empirical electrical conductivity assessment of nanofluids comprising cuo nanoparticles water-based in different concentrations, particles size and various temperatures of nanofluids has been carried out in this paper. these experimentations have been done in deionized water with nanoparticles sizes such as 89, 95, 100 and 112 nm and concentrations of 0.12 g/l, 0.14 g/l, 0.16 g/l and 0.18 g/...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

here, we report analysis of in vitro and in vivo drug release from an in situ formulation consisting of triamcinolone acetonide (tr) and poly(d,l-lactide-co-glycolide) (plga) and the additives glycofurol and hydroxyapatite nanoparticles (ha). we found that these additives enhanced drug release rate. we used the taguchi method to predict optimum formulation variables to minimise the initial burs...

Journal: :iranian journal of pharmaceutical sciences 0
amir dustgania chemical engineering department, tarbiat modares university, tehran, iran ebrahim vasheghani farahani chemical engineering department, tarbiat modares university, tehran, iran mohammad imani novel drug delivery systems department, iran polymer and petrochemical institute, tehran, iran

biodegradable nanoparticulate carriers, have important potential applications for administration of therapeutic molecules. chitosan based nanoparticles have attracted a lot of attention upon their biological properties such as biodegradability, biocom-patibility and bioadhesivity. the aim of the present investigation was to describe the synthesis and characterization of novel biodegradable nano...

Journal: :تحقیقات نظام سلامت 0
فاطمه مؤمنی ها کارشناس ارشد، گروه بهداشت محیط، مرکز تحقیقات مواد زائد جامد، دانشکده بهداشت و پژوهشکده محیط زیست، دانشگاه علوم پزشکی تهران، تهران، ایران کاظم ندافی دانشیار، گروه بهداشت، محیط دانشکده بهداشت و پژوهشکده محیط زیست، دانشگاه علوم پزشکی تهران، تهران، ایران محمد صادق حسنوند دانشجوی دکتری ، گروه بهداشت محیط، دانشکده بهداشت و پژوهشکده محیط زیست، دانشگاه علوم پزشکی تهران، تهران، ایران رامین نبی زاده دانشیار، گروه بهداشت، محیط دانشکده بهداشت و پژوهشکده محیط زیست، دانشگاه علوم پزشکی تهران، تهران، ایران محسن حیدری دانشجوی دکتری، کمیته تحقیقات دانشجویی، گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background: the problem of the environmental pollution by nanoparticles, which have recently entered the cycle of industries process in iran, is very important and can be prevented with applying the proper management approaches. one of the most practical compounds is zno nanoparticle. in the present study  the (lethal concentration-50) lc50 24hr and 48hr of zno nanoparticles exposed-to reactive...

Journal: :iranian journal of biotechnology 2015
tayebeh saleh azam bolhassani seyed abbas shojaosadati saman hosseinkhani

background: the poor permeability of the plasma and nuclear membranes to dna plasmids are two major barriers for the development of these therapeutic molecules. therefore, success in gene therapy approaches depends on the development of efficient and safe non-viral delivery systems. objectives: the aim of this study was to investigate the in vitro delivery of plasmid dna encoding hpv16 e7 gene ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم پایه 1392

a novel and ultra low cost isfet electrode and measurement system was designed for isfet application and detection of hydronium, hydrazinium and potassium ions. also, a measuring setup containing appropriate circuits, suitable analyzer (advantech board), de noise reduction elements, cooling system and pc was used for controlling the isfet electrode and various characteristic measurements. the t...

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