نتایج جستجو برای: ceriumiv oxide

تعداد نتایج: 176320  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
pallavi ameta anil kumar rameshwar ameta r.k. malkani

the use of colored semiconductor oxide like copper (ii) oxide and nickel (ii) oxide for photocatalytic bleaching of rose bengal was investigated in detail. in order to harness the solar energy, the effective wavelength of the photocatalyst is to be expanded into the visible region and that increases the rate of photocatalytic bleaching of the dye. progress of the reaction was observed spectroph...

Journal: :international journal of nano dimension 0
ahmad allahbakhsh department of polymer engineering, south tehran branch, islamic azad university, tehran, iran. farhad sharif department of polymer engineering, amirkabir university of technology, tehran, iran. saeedeh mazinani amirkabir nanotechnology research institute (antri), amirkabir university of technology, tehran, iran. m. r. kalaee 1department of polymer engineering, islamic azad university, south tehran branch, tehran, iran.

in this study, an efficient and facile technique for preparing graphene oxide in suspension and powder forms was presented based on a modification on hummers' method followed by an additional ultrasonic process. the method involved the provision of graphene oxide from graphite by reaction of potassium permanganate and sulfuric acid with stabilizing the medium complex. furthermore, this stu...

Journal: :iranian journal of immunology 0
eric adua department of clinical and experimental medicine, linköping university, sweden frank oteng danso department of clinical and experimental medicine, linköping university, sweden oswald mensah boa-amponsem department of clinical and experimental medicine, linköping university, sweden frank adusei-mensah department of biochemistry, university of cape coast, cape coast, ghana

background: during the initial phase of an infection, there is an upregulation of inducible nitric oxide synthase in the macrophages for the production of nitric oxide. this is followed by the recruitment of polymorphonuclear leukocytes (neutrophils) which release arginase. arginase competes with inducible nitric oxide synthase for a common substrate l-arginine. objective: to investigate whethe...

Journal: :iranian journal of hydrogen & fuel cell 2015
mehdi kheirmand abolfath eshghi

reduced graphene oxide film was synthesized on a glassy carbon electrode by electro reduction of graphene oxide powders in aqueous solution. then platinum nano particles were deposited on reduced graphene oxide film that was deposited on the glassy carbon electrode via electro reduction of platinum salt. the physical morphology of the platinum on reduced graphene oxide film was evaluated by sca...

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Alumina-mullite-zirconia composites were prepared by the reaction sintering method between alumina and zircon powders and the effect of two additives (chromium oxide and manganese oxide)were investigated on their properties. 2 and 4 wt% of each oxide were added to the raw material composition and after pressing, the samples were sintered at 1630°C. The results showed that chromium oxide decreas...

Journal: :avicenna journal of medical biotechnology 0

background: antibiotic resistant bacteria can be considered as a main problem in infection management. zinc oxide nanoparticles (zno nps), individually or in combination with antibiotics, can be considered as good candidates for struggling against drug resistant bacteria. methods: in this study, zinc oxide nanoparticles were synthesized using sol-gel method in low temperature as a cost effectiv...

Journal: :jundishapur journal of natural pharmaceutical products 0
nadereh rahbar nanotechnology research center, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of medicinal chemistry, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of medicinal chemistry, school of pharmacy, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6113738378, fax: +98-6113738381 hooshang parham department of chemistry, shahid chamran university, ahvaz, ir iran

conclusions this easily fabricated electrode together with the fast and sensitive sw voltammetry was successfully applied for the determination of concentration of atz at trace levels, in different water samples. results the results revealed that decrease in peak current was proportional to atz concentration over the range of 5-75 ng/ml. the limit of detection (lod) and limit of quantification ...

Journal: :iranian chemical communication 2014
mohamad mohsen momeni ali kazempoor mahboubeh mirhosseini mohadesah hakimiyan zohre nazari

cupper oxide structures with a variety of novel morphologies are synthesized using cupper foil as substrate via a solution route. the structure, morphology and phase of the as-synthesized nanostructures are analyzed by various techniques. sem images show gradual development of hierarchical structures of copper oxide with different morphology. in order to study the effect of reaction time and te...

Journal: :journal of medical bacteriology 0
amirhossein mirhashemi dental research center, dentistry research institute , department of orthodontics, tehran university of medical sciences, tehran, ir iran. abbas bahador department of microbiology, school of medicine, tehran university of medical sciences, tehran, ir iran. mohammadzaman kassaee department of chemistry, tarbiat modarres university, tehran, ir iran. ghazaleh daryakenari department of esthetic and restorative dentistry, dental school, babol university of medical sciences, babol, ir iran. mohammadsadegh ahmad-akhoundi dental research center, dentistry research institute , department of orthodontics, tehran university of medical sciences, tehran, ir iran. ahmad sodagar dental research center, dentistry research institute , department of orthodontics, tehran university of medical sciences, tehran, ir iran.

background : incidence of  white  spots due  to  demineralization of  enamel  and  gingival problems  is  an  unacceptable  result  of  orthodontic  treatment.  plaque  accumulation  and bacterial biofilm growth are responsible for these phenomena. the resin-based dental composites used as bonding agents in orthodontics play a major role in mentioned problems. as recent researches assert the an...

Journal: :energy equipment and systems 0
behdad shadidi department of biosystems engineering, faculty of agriculture, bu-ali sina university, hamedan, iran hossein haji agha alizade department of biosystems engineering, faculty of agriculture, bu-ali sina university, hamedan, iran barat ghobadian department of biosystems engineering, faculty of agriculture, tarbiat modaress university, tehran, iran

in internal combustion engines, only about a third of the total fuel input energy is converted into useful work. if the energy rejected into the cooling system and the exhaust gases could be recovered instead and put into useful work, fuel economy would have been substantially improved. the main aim of this research paper was to evaluate the effects of the hybrid nano-catalyst containing cerium...

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