نتایج جستجو برای: electrical properties

تعداد نتایج: 1030047  

Journal: :مرتع و آبخیزداری 0
فاطمه نقی زاده اصل فارغ التحصیل کارشناسی ارشد مدیریت مناطق بیابانی، دانشگاه تهران، ایران محمد جعفری استاد، دانشکده منابع طبیعی دانشگاه تهران، ایران حسین آذرنیومد استاد، دانشکده منابع طبیعی دانشگاه تهران، ایران محمد علی زارع چاهوکی استاد، دانشکده منابع طبیعی دانشگاه تهران، ایران

in this study, the role of soil properties in making difference between plant communitieswas examined. first, four plant types were identified, including pteropyrumaucheri-salsolarigida، astragalus gossypinus - acanthophyllum herateens، amygdalus scoparia – achilla millefolium and ephedra intermedia – erigon capestra, through randomized systematic sampling and field survey in representative are...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان خراسان رضوی - دانشکده علوم پایه 1390

نانوسیال مغناطیسی یا فروفلویید، محلول کلوییدی پایداری است که شامل نانو ذرات مغناطیسی بسیار ریز با ابعاد 10 نانومتر می باشند که در یک سیال پایه پراکنده شده اند. امروزه در دنیای مدرن نانوسیالات مغناطیسی نقش بسیار زیادی در علم و تکنولوژی ایفا می کنند. نانو سیال، fe3o4 به خاطر ویژگیهای منحصر به فردش از جمله خواص مغناطیسی مطلوب و سازگاری با محیط زیست مورد توجه خاص پژوهشگران قرار دارد. در این تحقیق...

Abolfazl Sotoudeh Ali Rajabi, Mina Amirmazlaghani,

In this paper, photodetection properties of a Graphene-based device at the third telecommunication window have been reported. The structure of the device is a Graphene-silicon Schottky junction which has been simulated in the form of an infrared photodetector. Graphene has specific electrical and optical properties which makes this material a good candidate for optoelectronic applications. Phot...

Journal: :iranian journal of science and technology (sciences) 2012
m. jafari

in the present work, the electronic properties of titanium were studied in three phases of α, β and ω using the density function theory (dft). the full potential augmented plane wave plus local orbital (flapw+lo) method was applied using the generalized gradient approximation. the calculated total energies showed that omega phase was more stable than the two other phases. the largest electrical...

The structural and electrical properties of polyaniline-cobalt sulphate nanocomposite prepared by chemical method.Polyaniline-cobalt sulphate nanocomposites were synthesized by the cobalt sulphate and ammonium persulphate and aniline.This paper reports on chemical technique using for synthesis of cobalt nanoparticles in the composite bridge is aniline. Electrical conductivity of polyaniline wit...

The structural and electrical properties of polyaniline-cobalt sulphate nanocomposite prepared by chemical method.Polyaniline-cobalt sulphate nanocomposites were synthesized by the cobalt sulphate and ammonium persulphate and aniline.This paper reports on chemical technique using for synthesis of cobalt nanoparticles in the composite bridge is aniline. Electrical conductivity of polyaniline wit...

Room temperature dielectric and antibacterial behavior of thiosemicarbazide capped low dimension Silver and Gold nanoparticles were studied. The effect of size on the properties, by capping silver (Ag) and gold (Au) nanoparticles by thiosemicarbazide (TSC) was investigated. The nanoparticles were synthesized by chemical reduction method. The structural formation, surface morphology, phase stabi...

ژورنال: سنجش و ایمنی پرتو 2020

Carbon nanostructures via adding to a polymer matrix, while improving the electrical, mechanical and optical properties of the nanocomposites, are widely used in the industry, medicine, and agriculture. The authors presented several investigations on a new type of gamma dosimeter based on the polymer-carbon nanostructures nanocomposite. In this research, the electrical percolation threshold of ...

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