نتایج جستجو برای: carbon black

تعداد نتایج: 415608  

We present a general study on a high performance supercapacitor based on intercalated reduced graphene oxide with carbon black nanoparticles. Graphene oxide sheets were synthesized by oxidation and exfoliation of natural graphite and were reduced using hydroiodic acid in the presence of carbon black nanoparticles. Graphene paper was fabricated by one-step procedure via simultaneous reducing and...

Hasan Jahangiri, Pourya Mehdizadeh

To prevent serious electromagnetic interference, a single-layer and double layer wave-absorbing coating employing complex absorbents composed of carbon black with epoxy resin as matrix was prepared. The morphologies of carbon black /epoxy composites were characterized by scanning electron microscope  and atomic force microscope, respectively. The carbon black  particles exhibit obvious polyarom...

Journal: :علوم زیستی ورزشی 0
محمد فشی استادیار دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه شهید بهشتی، تهران، ایران حمید آقا علی نژاد دانشیار فیزیولوژی ورزشی گروه تربیت بدنی و علوم ورزشی دانشگاه تربیت مدرس، تهران، ایران حسن اصیلیان مهابادی دانشیار مهندسی بهداشت حرفه ای، گروه بهداشت حرفه ای و محیط، دانشکدۀ علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران بتول رضایی سراجی دکتری فیزیولوژی ورزشی گروه تربیت بدنی و علوم ورزشی دانشگاه تربیت مدرس، تهران، ایران بهزاد پاک راد دکتری فیزیولوژی ورزشی گروه تربیت بدنی و علوم ورزشی دانشگاه تربیت مدرس، تهران، ایران

the present study aimed at evaluating the effect of aerobic exercise in carbon black particulates air pollution on tlr4 and tnf-α gene expression in male rats. 24 male wistar rats (mean body mass 279.29+26.97 gr) were randomly divided into 4 groups: a) control, b) aerobic exercise, c) pollution, d) exercise+pollution. a particulates injector and falounak chamber were used to expose the rats to ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پایه 1391

طیف سنجی رامان ارتقا یافته سطحی (sers) یک روش طیف سنجی رامان است? که سیگنال رامان ارتقا? یافته بزرگی را برای مولکول های هدفی که بر روی سطوح فلزی معین جذب سطحی شده?اند، به دست می?دهد. در این پژوهش ابتدا دو زیرلایه مختلف sers ساخته و مشخصه?یابی شدند. زیرلایه های ساخته شده عبارتند از: 1) نانو ذرات نقره کلوئیدی ساخته شده به روش لی و میسل، 2) نانو ذرات نقره کلوئیدی ساخته شده به روش کریتون اصلاح ...

Journal: :علوم و تکنولوژی پلیمر 0
مهدیه احمدی فرهنگ عباسی حسین قره باغی تازه کند

the enhanced dispersion of organophilic layered silicates improves the mechanical properties of polymer/ silicate composites. in this work, a hybrid filler system consisting of cloisite 15a organoclay (oc) and carbon black (cb) was used to improve the properties of the tire tread compounds. the physical and mechanical properties of compounds were assessed by measurement of their cure properties...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
(pages 57-62) r. behzad kh. behzad m. mazaheri tehrani m. shahidi noghabi

one of the most important stages in sugar industry that making wastewater and contamination is the water obtained to washing of co2 in mazoot furnace and related pumps. amount of water consumption in this stage is about 30 to 35 percent of weight of sugar beet, so amount of this stream is considerable. mixing of carbon black and water compose the colloid in liquid phase. these colloids do not s...

Polysulfide is well known elastomer for use in aerospace applications due to providing flexible coating and chemically resistant sealants. In this work, the effects of carbon black content on curing behavior of polysulfide elastomer were investigated and Rheological properties for samples with different filler content 15, 20 and 25 phr were evaluated by rheometric mechanical spectrometer RMS. A...

Journal: :علوم و تکنولوژی پلیمر 0
میرحمیدرضا قریشی سعید تقوایی رامین ظفرمهرابیان

this research work is devoted to the investigation on the use of silica on the fatigue-to-failure property of a tire tread compound. a reference compound was frst designed in which 60 phr carbon black was used as the reinforcing fller. while keeping the total of fller content to be constant as 60 phr, three additional compounds with 5, 10 and 20 phr silica were then manufactured. the classical ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Shane G DuBay Carl C Fuldner

Atmospheric black carbon has long been recognized as a public health and environmental concern. More recently, black carbon has been identified as a major, ongoing contributor to anthropogenic climate change, thus making historical emission inventories of black carbon an essential tool for assessing past climate sensitivity and modeling future climate scenarios. Current estimates of black carbo...

In this paper, new various morphologies of boron carbide were successfully synthesized using carbon black, activated carbon and boron oxide precursors as well as using cobalt nanoparticles as catalysts. Almost the whole morphology of synthesized boron carbide are consisted of smooth nanowires and nanobelts. With decreasing the carbon black particles size from 29 nm to 13 nm (29, 23, 17 and 13),...

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