نتایج جستجو برای: Carbon nano-tubes

تعداد نتایج: 353314  

Journal: :international journal of nanoscience and nanotechnology 2014
s. rahmani m. mahmoudifard m. safi

ultraviolet waves, because of their short wavelength, have a high energy and considerable damaging effects on surfaces. protection against ultraviolet radiations is one of the finishing treatments done on surfaces exposed to sunlight. the importance of this issue in relation to human health, due to complications such as skin burns and cancer, is doubled. up to now, different materials such as z...

Journal: :environmental health engineering and management 0
ali asghar najafpoor health sciences research center, department of environmental health engineering, school of health, mashhad university of medical sciences, mashhad, iran ghorban soleimani shahid sadoughi university of medical sciences, yazd, iran mohammad hasan ehrampoush environmental health engineering department, shahid sadoughi university of medical sciences, yazd, iran mohammad taghi ghaneian environmental health engineering department, shahid sadoughi university of medical sciences, yazd, iran elham rahmanpour salmani department of environmental health, school of health, mashhad university of medical sciences, mashhad, iran maryam dolatabadi takabi student research committee, department of environmental health, school of health, mashhad university of medical sciences, mashhad, iran

background: the presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. hexavalent chromium (cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. in this study, we made a comparison between different adsorption isotherms in the ...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
masoud zadkhast msc student, department of mechanical engineering, najafabad branch, islamic azad university, isfahan, iran davood toghraee assistant professor, department of mechanical engineering, khomeinishahr branch, islamic azad university, isfahan, iran arash karimipour assistant professor, department of mechanical engineering, najafabad branch, islamic azad university, isfahan, iran

this work presents a model for calculating the effective ‎thermal conductivity of nanofluids. the proposed model ‎includes the effects of nanoparticles and thermal conductivity ‎base fluid.we will focus on experimental of the volume ‎concentration parameter and temperature on thermal ‎conductivity, nano-fluid combination and multi-walled ‎carbon nanotubes-oxide / copper-paid deionized water. th...

Ali Asghar Najafpoor, Elham Rahmanpour Salmani, Ghorban Soleimani, Maryam Dolatabadi Takabi, Mohammad Hasan Ehrampoush, Mohammad Taghi Ghaneian,

Background: The presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. Hexavalent Chromium (Cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. In this study, we made a comparison between different adsorption isotherms in the ...

ژورنال: طلوع بهداشت یزد 2014
احرام پوش, محمد حسن , اسماعیلی, حبیب الله , امراللهی, محسن, سلیمانی خمارتاش , قربان, علیدادی, حسین , قانعیان, محمد تقی , نجف پور, علی اصغر,

Abstract Introduction: The heavy metals are the most important pollutant that their concentration in environment is increasing with cities and industrials developing. One of this metals is chromium that in the trivalent and hexavalent oxidation state used in industries such as electroplating, glass, ceramic, tannery and leather. Hexavalent chromium has proven several health hazards such as a c...

M. Mahmoudifard M. Safi S. Rahmani

Ultraviolet waves, because of their short wavelength, have a high energy and considerable damaging effects on surfaces. Protection against ultraviolet radiations is one of the finishing treatments done on surfaces exposed to sunlight. The importance of this issue in relation to human health, due to complications such as skin burns and cancer, is doubled. Up t...

Journal: :journal of advances in computer research 0
malakeh karimghasemi-rabori department of electrical engineering, payame noor university (pnu), kerman, iran peiman keshavarzian department of computer engineering, kerman branch, islamic azad university, kerman, iran

due to the high density and the low consumption power in the digital integrated circuits, mostly technology of cmos is used. during the past times, the metal oxide silicon field effect transistors (mosfet) had been used for the design and implementation of the digital integrated circuits because they are compact and also they have the less consumption power and delay to the other transistors. b...

Ahmad Goli, Hasan Ziari Hosein Farahani

Nowadays, utilisation of Nano-materials as one of the most recent methods of bitumen modification has attracted attention of many researchers. However, not enough research has been pursued on their mixing with bitumen, because of their dimensions and specific properties. In this study, the carbon Nano-tubes were mixed with bitumen using different mixers and some images were recorded employing a...

2011
MEHDI VADI

In this research by equilibrium adsorption isotherms of vitamin B2 (Ribo Flavin) on carbon nano-tubes having the multi wall through several discontinues method has been studied.with the help of spectro photometer (UV / VIS) adsorption chart based on the wavelength of vitamin B2 has been obtained, and the relevant graph is plotted .by considering factor of concentration, the concentration necess...

2007
PETER KUCHMENT

An explicit derivation of dispersion relations and spectra for periodic Schrödinger operators on carbon nano-structures (including graphene and all types of single-wall nano-tubes) is provided.

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