نتایج جستجو برای: radiation effects

تعداد نتایج: 1749321  

Journal: مدیریت شهری 2015

Solar Radiation is considered as an important parameter in modeling environmental, hydrologic and biophysical processes. One of the reasons that solar radiations are not extensively used in models is the problem of its measurement in different points. Solar Analyst Viewshed Algorithm makes possible calculation of the topographic effects on solar radiation at local and landscape scales. With res...

Mohi Rezvani

Radiation-induced normal tissue lesions, once seen as a consequence of loss of proliferative integrity of clonogenic target cells, inevitable and untreatable are now viewed as a result of dynamic interactions between multiple cell lines within a particular tissue that can be intervened. Normal tissue damage is the most important limiting factor in radiotherapy and a major component in the medic...

The high-frequency performance of the reflector antennas is mainly limited by the surface. It has been shown that distortions on different regions of the reflector surface can have different effects on the radiation performance. In other words, degradation of the radiation pattern due to the presence of surface distortions is sensitive to the location and behavior of the surface distortion prof...

جباری, ایرج, خالویی, الهام, زابلیان, حسین, میرزا, بهروز,

In this study, the effects of gamma and electron radiation on reflectivity of silver mirrors coated by TiO2 and Ta2O5, in the wavelength range 250 to 1100 (nm) has been investigated. The coatings are considered for space applications in LEO orbit at 500 (km) from the earth surface for three-year mission in space. Electron and gamma dose absorbed within the three-year are respectively about 7.5 ...

Journal: :international journal of advanced design and manufacturing technology 0
meysam atashafrooz department of mechanical engineering, shahid bahonar university of kerman, iran s. a. gandjalikhan nassab e. sadat behineh

in this paper, the effects of baffle on thermal characteristics of combined convection-radiation heat transfer in laminar flow adjacent to an inclined backward facing step (bfs) in a horizontal duct are investigated. a baffle is mounted on the top wall of channel downstream side of step. in this study, the fluid is treated as a gray, absorbing, emitting and scattering medium; therefore, in the ...

Journal: :iranian journal of pharmaceutical research 0
seyed hadi mousavi medical toxicology research centre, mashhad, university of medical sciences, mashhad, iran. vahid vazifedan mashhad university of medical sciences javad sargolzaee mashhad university of medical sciences shokouhozaman soleymanifard mashhad university of medical sciences azar fani pakdel mashhad university of medical sciences

malignant tumors of head and neck carcinomas are the sixth most common type of cancer. current systemic therapies for cancer show side effects in normal tissues and short-term efficacy due to drug resistance. consequently, there is much interest in identifying new drugs for cancer treatment. crocin (an active ingredient of saffron) has been shown to have cytotoxic effects on cancer cell lines. ...

Ali Benjavad Talebi Amin Benjavad Talebi

The purpose of the research was determine the effects of gamma ray on seed germination, seedling height and root length of Rice (Oryza sativa L. spp. Indica cv. MR219) to identify the Lethal Dosage of the radiation. Paddy seeds of MR219 were exposed to different doses of gamma radiations viz 50,100,150,200,250,300,350,400,450,500,600,700,800,900 and 1000 Gy using 60Co as the radiation source. T...

ژورنال: سنجش و ایمنی پرتو 2014

In this paper, the parametric X-ray radiation (PXR) spectral-angular distribution in the framework of the dynamical and kinematical diffraction theory was investigated in details. It is shown that dynamical diffraction effects can be increase with intensity of radiation, increase threshold energy saturation and the change in polarization of the radiation. Therefore, some unique properties of P...

Journal: :Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 1989

Journal: :FOOD IRRADIATION, JAPAN 1968

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