نتایج جستجو برای: ionizing radiation in tissues

تعداد نتایج: 17035469  

ژورنال: سنجش و ایمنی پرتو 2020

In this paper we consider a gaseous detector and supposed, because of pass of an ionizing radiation, an electron created inside it. By numerical simulation with monte carlo method and concluding the impacts, scatterings and creation of secondary electrons, we find the trajectory of initial and secondary electrons. Dependence of number of secondary electrons to applied electrical field is invest...

Azima S Mehravar S,

Background: Male reproductive disorders that are of interest from an environmental point of view include sexual dysfunction, infertility, cryptorchidism, hypospadias and testicular cancer. Several reports suggest declining sperm counts and increase of these reproductive disorders in some areas during some time periods past 50 years. Materials and Methods: Except for testicular cancer this evide...

Journal: :journal of biomedical physics and engineering 0
m eghlidospour smj mortazavi f yousefi sar mortazavi

mobile phone use and wireless communication technology have grown explosively over the past decades. this rapid growth has caused widespread global concern about the potential detrimental effects of this technology on human health. stem cells generate specialized cell types of the tissue in which they reside through normal differentiation pathways. considering the undeniable importance of stem ...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2012
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...

Journal: :iranian journal of radiation research 0
h.e. alkis department of radiation oncology, gaziantep university, medical school, gaziantep, turkey abdurahman kuzhan department of radiation oncology, gaziantep university, medical school, gaziantep, turkey a. dirier department of radiation oncology, gaziantep university, medical school, gaziantep, turkey m. tarakcioglu department of biochemistry and clinical biochemistry, gaziantep university, medical school, gaziantep, turkey e. demir department of biochemistry and clinical biochemistry, gaziantep university, medical school, gaziantep, turkey e. saricicek department of biochemistry, dr. ersin arslan state hospital, gaziantep, turkey

background: our purpose was to investigate propolis and its component caffeic acid phenethyl ester (cape) for their antioxidant effects on the brain tissue of rats exposed to ionizing radiation (ir). materials and methods: fifty-four male albino sprague-dawley rats, divided into six groups, were designed as normal control group, cranial irradiation of 5 gray alone, irradiation plus cape, irradi...

A. Keshtkar, A. Mesbahi, H. Sasaki, P. Mehnati,

Background: The fatal effect of ionizing radiation on cells depends on Linear Energy Transfer (LET) level. The distribution of ionizing radiation is sparse and homogeneous for low LET radiations such as X or γ, but it is dense and concentrated for high LET radiation such as heavy-ions radiation. Material and Methods: Chinese hamster ovary cells (CHO-K1) were exposed to 4 Gy Fe-ion 2000 keV/...

A Banaei Gh Ataei, M Elahi R Abedi Firouzjah, S Moradi S Nadi,

Background: Medical use of ionizing radiation has direct/indirect undesirable effects on normal tissues. In this study, the radioprotective effect of arbutin in megavoltage therapeutic x-irradiated mice was investigated using serum alkaline phosphatase (ALP), alanine aminotransferase (ALT), and asparate amniotransferase (AST) activity measurements. Material and Methods: In this analytical...

حق پرست, عباس, خوش گرد, کریم, رضائی, محمد,

Background and purpose: Nowadays High-intensity focused ultrasound (HIFU) as non-ionizing radiation is used for cancer treatment. Ultrasound beams when crossing the border of two environments are refracted causing decrease in the beam focusing within a tumor. Also, it may induce damage to normal tissues. In this study, we evaluated the focal depth shift induced by ultrasonic beam refraction. ...

Journal: :Journal of medical genetics 1974
G W Dolphin D C Lloyd

A brief review is given of the production and analysis of chromosome aberrations induced by ionizing radiation. The various tissues in which it is possible to demonstrate aberrations are noted and particular emphasis is laid on the culture of peripheral blood lymphocytes. Some examples of recent applications of the technique are described. These are in the determination of suspected overdoses t...

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