نتایج جستجو برای: electromagnetic fields emfs

تعداد نتایج: 307315  

Journal: :Environmental Health Perspectives 1995
Jeffrey Saffer

Riverside: Animal cancer studies using a mouse skin model on co-promotion by 60 Hz EMFs with the initiator dimethylbenzanthracene and the promoter 12O-tetradecanoylphorbol13acetate; * Charles Graham, Midwest Research Institute, Kansas City, Missouri: Human studies on the effects of nighttime EMF exposures on melatonin, other hormones, and the immune system; * Sek Wen Hui, Roswell Park Cancer In...

Journal: :تحقیقات نظام سلامت 0
سمیه بلقن آبادی دانشجوی کارشناسی ارشد گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حسینعلی یوسفی مربی، عضو هیأت علمی گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حبیب اله دهقان استادیار، عضو هیأت علمی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، ایران

background: with increased use of computers, exposure to electric and magnetic fields is increasing, the main objective of this study was to evaluate the electric and magnetic field strength in portable computers (laptops) and its relation with eyestrain users. methods: in this cross – sectional study, magnetic and electric fields in 125 laptop computers were measured from 30 cm and 50 cm dista...

Journal: :IEEE Transactions on Electromagnetic Compatibility 2021

This article reviews recent standardization activities and scientific studies related to the assessment of human exposure electromagnetic fields (EMF). The differences standards consumer products medical applications are summarized. First, we reviewed body modeling tissue dielectric properties. Then, explain rationale current from viewpoint EMF process for product compliance based on these stan...

Journal: :Siriraj Medical Journal 2021

Objective: Recent technological advances have exponentially expanded globally; harbouring upon Electromagnetic fields (EMF). The utilization of field has become universal from everyday usage electronic appliances such as micro wave ovens, tablets and portable computers to telecommunication systems mobile phone towers, radio- television broadcast power transmission resulting in electromagnetic a...

Journal: :Electronics 2022

Employing electromagnetic fields (EMFs) in new wireless communication and sensing technologies has substantially increased the level of human exposure to EMF waves. This paper presents a useful insight into interaction with biological media that is defined by heat generation due induced currents dielectric loss. The specific absorption rate (SAR) defines heating amount medium irradiated an fiel...

Journal: :Archives of environmental health 2001
T E Aldrich K W Andrews A R Liboff

Cancer cluster studies in North Carolina identified several communities in which there existed an elevated risk of brain cancer. These findings prompted a series of case-control studies. The current article, which originated from the results of the 3rd of such studies, is focused on inclusion of the earth's own geomagnetic fields that interact with electromagnetic fields generated from distribu...

Journal: :Environmental Health Perspectives 2003
Joseph D Brain Robert Kavet David L McCormick Charles Poole Lewis B Silverman Thomas J Smith Peter A Valberg R A Van Etten James C Weaver

Numerous epidemiologic studies have reported associations between measures of power-line electric or magnetic fields (EMFs) and childhood leukemia. The basis for such associations remains unexplained. In children, acute lymphoblastic leukemia represents approximately three-quarters of all U.S. leukemia types. Some risk factors for childhood leukemia have been established, and others are suspect...

Journal: :international journal of reproductive biomedicine 0
parvin-dokht bayat mohmmad reza darabi ali ghanbari sara amiri pardis sohouli

background: indisputable population exposure to widespread electromagnetic fields, has grown concerns over the probable health effects of these fields. objective: the present study was aimed to examine the possible effects of 50 hz extremely low frequency electromagnetic field (elf-emf) exposure on the number and quality of mice blastocysts. materials and methods: in present study, 66 nmri preg...

Journal: :Journal of the National Cancer Institute 1996
P Holzman

As to the long standing debate about whether EMFs can cause cancer, researchers hope this study will add to the already substantial body of evidence. The most extensive study to date, released in late October by the National Resource Council, found no conclusive evidence that EMFs cause cancer. A team of EMF specialists will use a special meter to take spot measurements on electromagnetic field...

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