نتایج جستجو برای: radiation effects

تعداد نتایج: 1749321  

Journal: :international journal of occupational hygiene 0
faramarz majidi department of occupational health, zanjan university of medical sciences, zanjan, iran. kamaledin abedi department of occupational health, faculty of health and paramedical sciences, zanjan university of medical sciences, zanjan, iran seyed reza azimi pirsaraei department of occupational health, zanjan university of medical sciences, zanjan, iran

the harmful effects of the long-term ocular exposure to cumulative levels of infrared radiation (ir) in glassblowing and foundries have been recognized since the late 19th century. these effects include cataracts, keratitis, and chronic dry eye problems. therefore, infrared radiation measurements are critical and need to be assessed regularly in the industries and workplaces where there are hig...

Journal: :iranian journal of radiation research 0
m.m.a. mamun department of biotechnology and genetic engineering, islamic university, kushtia‐7003, bangladesh

background: the earlier atomic bomb explosion in hiroshima and nagasaki, and three worth mentioning nuclear accidents - detonation at fukushima daiichi nuclear plant, chernobyl nuclear fallout and an accident at three mile island nuclear power plant have made us more worried about the secure exploitation of nuclear energy. the central focus of this paper is to review radiation-mediated health e...

Journal: :journal of occupational health and epidemiology 0
k ghazikhanlu-sani m alizadeh f mohammadi s mohamadpour sh hadidi y mohammadi

background: the biological effects of radiation on radiology personnel are divided into two groups of deterministic effects and stochastic effects. due to the effects of radiation on health, radiology staff may be afraid of radiation. younger personnel with little work experience, compared with older personnel, have higher level of fear. the fear among radiology personnel, like employees of var...

Journal: :cell journal 0

objective: in radiation treatment, the irradiation which is effective enough to control the tumors far exceeds normal-tissues tolerance. thus to avoid such unfavourable outcomes, some methods sensitizing the tumor cells to radiation are used. iododeoxyuridine (iudr) is a halogenated thymidine analogue that known to be effective as a radiosensitizer in human cancer therapy. improving the potenti...

Journal: :زیست شناسی جانوری تجربی 0
بهناز حاجیون کارشناسی ارشد فیزیولوژی، دانشگاه آزاد اسلامی، واحد کازرون، گروه فیزیولوژی، کازرون حامد الهی زاده کارشناس زیست شناسی جانوری

abstract background & aim: recent increase of hormonal disorders in human may be correlated to the increased exposure to electromagnetic fields produced by various instruments, including cell phones. thyroid gland is one of the organs most likely to be exposed to cell phone radiation. whereas garlic is known as reducing risk factors for various diseases. the aim of this study is to assess the a...

Introduction: The present study aimed to present a numerical analysis of the penetration depth,  specific absorption rate (SAR), and temperature rise in various eye tissues with varying distance between radiation source and exposed human eye tissues (i.e., cornea, posterior chamber, anterior chamber, lens, sclera, vitreous humor, and iris) at frequencies of 900 and1800 MHz. Materials and Method...

Introduction: Radiation effects observed in cells that are not irradiated are known as non-targeted effects.  Radiation induced bystander effect (RIBE) as a kind of non-targeted effect has been introduced in recent  years.  RIBE  occurs  in  unexposed  cells  which  are  related  to  adjacent  or  distant  irradiated  cells.  RIBE  contradict with "target theory" which necessitates radiation tr...

Journal: :journal of biomedical physics and engineering 0
sar mortazavi mb shojaei-fard m haghani n shokrpour smj mortazavi

alzheimer’s disease, the most common type of dementia and a progressive neurode-generative disease, occurs when the nerve cells in the brain die. although there are medications that can help delay the development of alzheimer’s disease, there is cur-rently no cure for this disease. exposure to ionizing and non-ionizing radiation may cause adverse health effects such as cancer. looking at the ot...

The radiation environment in deep space, where astronauts are behind the shelter provided by the Earth’s magnetosphere, is a major health concern. Galactic cosmic rays (GCR) and solar particle events (SPE) are two basic sources of space radiation in the solar system. The health risks of exposure to high levels of space radiation can be observed either as acute and delayed effects. Zhang et al. ...

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