نتایج جستجو برای: electromagnetic fields emfs

تعداد نتایج: 307315  

2003
Ricardo A. Mosna

The main objective of this paper is to clarify the ontology of DiracHestenes spinor fields (DHSF ) and its relationship with even multivector fields, on a Riemann-Cartan spacetime (RCST) M =(M,g,∇, τg, ↑) admitting a spin structure, and to give a mathematically rigorous derivation of the so called Dirac-Hestenes equation (DHE ) in the case where M is a Lorentzian spacetime (the general case whe...

Journal: :Physics in medicine and biology 2013
Marie-Christine Gosselin Sven Kühn Niels Kuster

The evaluation of the exposure from mobile communication devices requires consideration of electromagnetic fields (EMFs) over a broad frequency range from dc to GHz. Mobile phones in operation have prominent spectral components in the low-frequency (LF) and radio-frequency (RF) ranges. While the exposure to RF fields from mobile phones has been comprehensively assessed in the past, the LF field...

Journal: :General physiology and biophysics 2017
Ercan Ozdemir Ayse Demirkazik Sinan Gursoy Ahmet S Taskıran Olca Kilinc Gokhan Arslan

Several studies have demonstrated that the electromagnetic fields produce analgesic activity. The aim of this study was to investigate the effects of extremely low frequency (ELF) electromagnetic fields (EMF) on morphine analgesia and tolerance in rats. In the study, 78 adult male Wistar albino rats (approximately 240 ± 12 g) were used. The application of 50 Hz magnetic field, each day the same...

2014
Michael Carlberg Lennart Hardell

On 31 May 2011 the WHO International Agency for Research on Cancer (IARC) categorised radiofrequency electromagnetic fields (RF-EMFs) from mobile phones, and from other devices that emit similar non-ionising electromagnetic fields, as a Group 2B, i.e., a "possible", human carcinogen. A causal association would be strengthened if it could be shown that the use of wireless phones has an impact on...

Journal: :Wireless Networks 1997
Leif G. Salford Arne Brun Bertil R. R. Persson

It has been suggested that electromagnetic fields (EMF) act as promoters late in the carcinogenesis process. To date, however, there is no convincing laboratory evidence that EMFs cause tumour promotion at non-thermal exposure levels. Therefore the effects of exposure to electromagnetic fields were investigated in a rat brain glioma model. Some of the exposures correspond to electromagnetic fie...

Introduction: The use of cell phones is widespread and there are public concerns regarding its possible deleterious effects on human health especially on the pregnancy outcomes. In this study, structural changes of the placenta after applying the cell phone radiation were examined in the mice model.   Materials and methods: For this work, 40 pregnant Balb/C mice were randomly allocated to ...

Journal: :journal of basic research in medical sciences 0
ali louei monfared department of basic sciences, faculty of para-veterinary medicine, university of ilam, ilam, iran. aaref nooraii department of basic sciences, faculty of para-veterinary medicine, university of ilam, ilam, iran. morteza shamsi ilam medical university, ilam, iran

introduction: there are general concerns about the hazardous impacts of the cell phones radiation on the human health. in this study, the structural and biochemical changes of the mice kidney were assessed after cell phone exposure in. materials and methods: a total of 40 balb/c mice were randomly divided into the control and experimental groups. the experimental group exposed to cell phone dev...

Journal: :journal of research in health sciences 0
fatemeh shamsi mahmoudabadi saeideh ziaei mohammad firoozabadi anoshirvan kazemnejad

background: exposure to extremely low frequency electromagnetic fields is increasingly common, but the potential influence on pregnant women has not been thoroughly investigated. methods: in this case-control study, 58 women who had an unexplained spontaneous abortion at < 14 weeks gestation and 58 matched pregnant women >14 weeks gestation were enrolled in 2012. the women completed the questio...

Journal: :international journal of reproductive biomedicine 0
amir afshin khaki arash khaki shahram garachurlou fereshteh khorshidi nazila tajadini navid madinei

background: men are unavoidably exposed to ambient electromagnetic fields (emf) generated from various electrical gadgets and from power transmission lines. prostate gland plays an important role in secretion of semen as largest accessory gland of male reproductive system. it seems that protection of this gland against emf is important in spermatogenesis process. objective: the goal of this stu...

2016
Leena Korpinen Herkko Pirkkalainen Timo Heiskanen Rauno Pääkkönen

Various guidelines for the protection of human beings against possible adverse effects resulting from exposure to electromagnetic fields (EMFs) have been published with a view towards continual improvement; therefore, decreasing exposure is an important research area. The aim of this study was to investigate the possibility of decreasing electric field exposure with arc flash rated personal pro...

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