Specific absorption rate in rats exposed to 2,450-MHz microwaves under seven exposure conditions.

Abstract:

:Both positive and negative biological effects of microwaves on drug actions in rats exposed to 1-mW/cm2, 2,450-MHz microwaves have been reported by several investigators. We conducted dosimetry studies for seven different exposure conditions to determine whether these different results could be due to the rats having been exposed differently. They included anterior and posterior exposures in a circular waveguide, near field, far field with E- or H-field parallel to the long axis of the body and dorsal exposure in a miniature anechoic chamber with E- or H-field parallel to the long axis of the body. The average specific absorption rates (SARs) in the head, tail, and body of the exposed rats were measured by means of a calorimetry system. The local SARs at eight locations in the brain were determined by temperature measurement with Vitek probes. Intensive coupling of energy to the tail when it was exposed parallel to the E-field was shown by thermography. For the same average incident power density, the average SARs in the heads of rats were about two times higher in the circular waveguide than for other exposures. The local SARs in the brain varied for different exposure conditions. Statistical comparisons of SARs under the different exposure conditions are presented.

journal_name

Bioelectromagnetics

journal_title

Bioelectromagnetics

authors

Chou CK,Guy AW,McDougall JA,Lai H

doi

10.1002/bem.2250060108

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

73-88

issue

1

eissn

0197-8462

issn

1521-186X

journal_volume

6

pub_type

杂志文章
  • Neuronal outgrowth of PC-12 cells after combined treatment with nerve growth factor and a magnetic field: influence of the induced electric field strength.

    abstract::In view of possible therapeutic applications of magnetic fields, the effect of an enhancement of neuronal outgrowth at higher figures of flux density and induced field strength was investigated. On the average sinusoidal magnetic field treatment at 100 microTrms/50 Hz did not change nerve growth factor (NGF) induced n...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20073

    authors: Schimmelpfeng J,Weibezahn KF,Dertinger H

    更新日期:2005-01-01 00:00:00

  • Effects of millimeter waves on ionic currents of Lymnaea neurons.

    abstract::The effects of mm-waves 60.22-62.22 GHz and 75 GHz on A-type K+ currents and the effects of 61.22 GHz on Ca2+ currents of Lymnaea neurons were investigated using a whole-cell voltage-clamp technique. The open end of a rectangular waveguide covered with a thin Teflon film served as a radiator. Specific absorption rates...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:

    authors: Alekseev SI,Ziskin MC

    更新日期:1999-01-01 00:00:00

  • Dose dependence of acetylcholinesterase activity in neuroblastoma cells exposed to modulated radio-frequency electromagnetic radiation.

    abstract::Radio-frequency electromagnetic radiation (RFR) at 915 and 147 MHz, when sinusoidally amplitude modulated (AM) at 16 Hz, has been shown to enhance release of calcium ions from neuroblastoma cells in culture. The dose-response relation is unusual, consisting of two power-density "windows" in which enhanced efflux occur...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250130407

    authors: Dutta SK,Das K,Ghosh B,Blackman CF

    更新日期:1992-01-01 00:00:00

  • Use of the loss-tangent function in dielectric spectroscopy.

    abstract::A new method for finding the dielectric parameters of biological substances is presented. The method makes use of the loss-tangent as a function of frequency to identify the dominating relaxation process. The method was tested for a few cell suspensions (blood and lymphocytes) and two tissues (liver and spleen). The o...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250070303

    authors: Surowiec A,Stuchly SS

    更新日期:1986-01-01 00:00:00

  • Risk perception and public concerns of electromagnetic waves from cellular phones in Korea.

    abstract::In this study, the difference between the risk perception of electromagnetic waves from cellular phones and the risk perception of other factors such as environment and food was analyzed. The cause of the difference in the psychological and social factors that affect the group with high risk perception of electromagne...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21836

    authors: Kim K,Kim HJ,Song DJ,Cho YM,Choi JW

    更新日期:2014-05-01 00:00:00

  • Personal exposure to mobile communication networks and well-being in children--a statistical analysis based on a functional approach.

    abstract::The MobilEe-study was the first cross-sectional population-based study to investigate possible health effects of mobile communication networks on children using personal dosimetry. Exposure was assessed every second resulting in 86,400 measurements over 24 h for each participant. Therefore, a functional approach to an...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20477

    authors: Kühnlein A,Heumann C,Thomas S,Heinrich S,Radon K

    更新日期:2009-05-01 00:00:00

  • Effects of exposure to extremely low frequency magnetic fields on spermatogenesis in adult rats.

    abstract::The constant exposure of modern society to extremely low frequency magnetic fields (ELF-MF) has raised considerable concerns about the potential risks to male reproduction. However, the epidemiological and experimental data remain contradictory and inconclusive. In the present study, we investigated the effects of 50 ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21816

    authors: Duan W,Liu C,Wu H,Chen C,Zhang T,Gao P,Luo X,Yu Z,Zhou Z

    更新日期:2014-01-01 00:00:00

  • Morphofunctional study of 12-O-tetradecanoyl-13-phorbol acetate (TPA)-induced differentiation of U937 cells under exposure to a 6 mT static magnetic field.

    abstract::This study deals with the morphofunctional influence of 72 h exposure to a 6 mT static magnetic field (SMF) during differentiation induced by 50 ng/ml 12-O-tetradecanoyl-13-phorbol acetate (TPA) in human leukaemia U937 cells. The cell morphology of U937 cells was investigated by optic and electron microscopy. Specific...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20474

    authors: Dini L,Dwikat M,Panzarini E,Vergallo C,Tenuzzo B

    更新日期:2009-07-01 00:00:00

  • Mobile phone ownership and use among school children in three Hungarian cities.

    abstract::In spite of rapid worldwide increase in mobile phone use and public concerns about associated potential health effects, little is known about patterns of mobile phone ownership and use in the general population and among children. In April 2005, we conducted a survey of mobile phone ownership and use among fourth grad...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20270

    authors: Mezei G,Benyi M,Muller A

    更新日期:2007-05-01 00:00:00

  • Amplitude and frequency dissociation spectra of ion-protein complexes rotating in magnetic fields.

    abstract::A mechanism is presented that predicts new biological effects of static and sinusoidal weak magnetic fields. The model is based on an earlier proposed interference mechanism of quantum states of ions within protein cavities. The quantum dynamics of an ion is studied for the case of ion-protein complexes that rotate in...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:

    authors: Binhi VN

    更新日期:2000-01-01 00:00:00

  • Studies on the possible biological effects of 50 Hz electric and/or magnetic fields: evaluation of some glycolytic enzymes, glycolytic flux, energy and oxido-reductive potentials in human erythrocytes exposed in vitro to power frequency fields.

    abstract::An attempt has been made to understand whether 50 Hz electric and magnetic fields (EMFs) are involved in producing bioeffects by exposing human erythrocytes in vitro. The study evaluated some key glycolytic enzymes, glucose consumption, lactate production, energy charge, 2,3-diphosphoglycerate, and reduced glutathione...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250140410

    authors: Dachà M,Accorsi A,Pierotti C,Vetrano F,Mantovani R,Guidi G,Conti R,Nicolini P

    更新日期:1993-01-01 00:00:00

  • The Radiofrequency Radiation Dosimetry Handbook: reminiscences.

    abstract::This paper traces the history of the development of the Radiofrequency Radiation Dosimetry Handbook and its subsequent impact on radio frequency radiation exposure standards. The author's recollections are used to illustrate the behind the scenes efforts of the individuals involved in this project. The development of ...

    journal_title:Bioelectromagnetics

    pub_type: 历史文章,杂志文章

    doi:10.1002/(sici)1521-186x(1999)20:4+<9::aid-bem3>3.3

    authors: Allen SJ

    更新日期:1999-01-01 00:00:00

  • Short-term exposure to a 1439-MHz TDMA signal exerts no estrogenic effect in rats.

    abstract::The aim of this study was to elucidate the possible effects of short-term exposure to a 1439-MHz electromagnetic field (EMF) employing time division multiple access (TDMA), which is the basis of the Japanese Personal Digital Cellular system, on estrogenic activity in rats. Sixty-four ovariectomized female Sprague-Dawl...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20593

    authors: Yamashita H,Hata K,Yamaguchi H,Tsurita G,Wake K,Watanabe S,Taki M,Ueno S,Nagawa H

    更新日期:2010-10-01 00:00:00

  • The remote sensing of mental stress from the electromagnetic reflection coefficient of human skin in the sub-THz range.

    abstract::Recent work has demonstrated that the reflection coefficient of human skin in the frequency range from 95 to 110 GHz (W band) mirrors the temporal relaxation of stress induced by physical exercise. In this work, we extend these findings to show that in the event of a subtle trigger to stress, such as mental activity, ...

    journal_title:Bioelectromagnetics

    pub_type: 临床试验,杂志文章

    doi:10.1002/bem.21698

    authors: Safrai E,Ishai PB,Caduff A,Puzenko A,Polsman A,Agranat AJ,Feldman Y

    更新日期:2012-07-01 00:00:00

  • The effect of 20-week continuous 60 Hz magnetic field exposure on testicular function in sprague-dawley rats.

    abstract::Accumulating evidence does not yet confirm the effect of power line frequency magnetic field (MF) on human health and fertility. We recently reported that, at continuous 60 Hz MF exposure in mice, the dose given as magnetic flux density (tesla; T) and duration of exposure was related to induce testicular germ cell apo...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.22146

    authors: Park S,Kim YJ,Kim MS,Kim HS,Kim MW,Kang YM,Lee SK,Choi KC,Kim N,Gimm YM,Kim YW

    更新日期:2018-10-01 00:00:00

  • Do people understand IARC's 2B categorization of RF fields from cell phones?

    abstract::In May 2011, the International Agency on Cancer in Research (IARC) issued an official statement concluding that cell phone usage was "possibly carcinogenic to humans." There have been considerable doubts that non-experts and experts alike fully understood what IARC's categorization actually meant, as "possibly carcino...

    journal_title:Bioelectromagnetics

    pub_type: 信件

    doi:10.1002/bem.21851

    authors: Wiedemann PM,Boerner FU,Repacholi MH

    更新日期:2014-07-01 00:00:00

  • Experimental validations of in vivo human musculoskeletal tissue conductivity images using MR-based electrical impedance tomography.

    abstract::Magnetic resonance (MR)-based electrical impedance tomography (MREIT) is a widely used imaging technique that provides high-resolution conductivity images at DC or below the 1 kHz frequency range. Using an MR scanner, this technique injects imaging currents into the human body and measures induced internal magnetic fl...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21852

    authors: Jeong WC,Meng ZJ,Kim HJ,Kwon OI,Woo EJ

    更新日期:2014-07-01 00:00:00

  • Influence of extremely low frequency electromagnetic fields on the swimming behavior of ciliates.

    abstract::Different species of ciliates (Paramecium biaurelia, Loxodes striatus, Tetrahymena thermophila) have been taken as model systems to study the effects of extremely low-frequency electromagnetic fields (50 Hz, 0.5-2.0 mT) on the cellular level. A dose-dependent increase in the mean swimming velocity and a decrease in th...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/(sici)1521-186x(1997)18:7<491::aid-bem4>3.

    authors: Hemmersbach R,Becker E,Stockem W

    更新日期:1997-01-01 00:00:00

  • Effects of 60-Hz electric fields on cellular elongation and radial expansion growth in cucurbit roots.

    abstract::Serial longitudinal and transverse sections were prepared from roots of Cucumis sativus and Cucurbita maxima that had been exposed/sham-exposed to 60-Hz electric fields for 0-2 days. Field exposures were selected to produce a 10-20% or a 70-80% growth inhibition in whole roots of both species. Cortical cell length and...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250080108

    authors: Brayman AA,Miller MW,Cox C

    更新日期:1987-01-01 00:00:00

  • Study of p53 expression and post-transcriptional modifications after GSM-900 radiofrequency exposure of human amniotic cells.

    abstract::The potential effects of radiofrequency (RF) exposure on the genetic material of cells are very important to determine since genome instability of somatic cells may be linked to cancer development. In response to genetic damage, the p53 protein is activated and can induce cell cycle arrest allowing more time for DNA r...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.21744

    authors: Bourthoumieu S,Magnaudeix A,Terro F,Leveque P,Collin A,Yardin C

    更新日期:2013-01-01 00:00:00

  • Design and fabrication of well confined uniform magnetic field exposure systems.

    abstract::Exposure systems that provide good magnetic field uniformity, minimum stray fields, and minimal heating, vibration, and hum, as well as capability for true sham exposure in which current flows in the coils, are needed to determine rigorously the biological effects of weak magnetic fields. Designs based on acrylic poly...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250150610

    authors: Wilson BW,Caputa K,Stuchly MA,Saffer JD,Davis KC,Washam CE,Washam LG,Washam GR,Wilson MA

    更新日期:1994-01-01 00:00:00

  • Influence of 50 Hz magnetic field on sex hormones and other fertility parameters of adult male rats.

    abstract::The effects of an extremely low frequency (ELF) magnetic field on the sex hormones and other fertility parameters of adult male Sprague-Dawley rats were investigated. Adult male rats were exposed to a 50 Hz sinusoidal magnetic field at approximately 25 microT (rms) for 18 consecutive weeks. There were no significant e...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20186

    authors: Al-Akhras MA,Darmani H,Elbetieha A

    更新日期:2006-02-01 00:00:00

  • Morphological and electrophysiological changes produced by electrical stimulation in cultured neuroblastoma cells.

    abstract::Electric fields, which were equivalent to those generated by medical devices, were applied to cultured neuroblastoma cells (mouse and human) to test for morphological damage and to establish damage thresholds. Each of two methods of applying fields permitted flow of electrical current and minimized exposure of cells t...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250120505

    authors: Krauthamer V,Bekken M,Horowitz JL

    更新日期:1991-01-01 00:00:00

  • Calorimetric measurements of the effect of 330-MHz radiofrequency radiation on human erythrocyte ghosts.

    abstract::Irreversible changes in the heat capacity of human erythrocyte ghost suspensions due to the effect of 330-MHz radiofrequency radiation (at a specific absorption rate of approximately 9 mW/g) were detected by the method of scanning differential microcalorimetry. Using the data obtained from the analysis of infrared spe...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250050406

    authors: Shnyrov VL,Zhadan GG,Akoev IG

    更新日期:1984-01-01 00:00:00

  • Cognitive effects of radiation emitted by cellular phones: the influence of exposure side and time.

    abstract::This study examined the time dependence effects of exposure to radiofrequency radiation (RFR) emitted by standard GSM cellular phones on the cognitive functions of humans. A total of 48 healthy right-handed male subjects performed a spatial working memory task (that required either a left-hand or a right-hand response...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20458

    authors: Luria R,Eliyahu I,Hareuveny R,Margaliot M,Meiran N

    更新日期:2009-04-01 00:00:00

  • Radiofrequency radiation does not induce stress response in human T-lymphocytes and rat primary astrocytes.

    abstract::Heat shock proteins (HSPs) are rapidly induced by a variety of stressors, including heat shock, ethanol, heavy metals, UV, and gamma-radiation. Mitogen-activated protein kinases (MAPKs) are also involved in the stress transduction pathways in all eukaryotes. In this study, we attempted to determine whether radiofreque...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20235

    authors: Lee JS,Huang TQ,Kim TH,Kim JY,Kim HJ,Pack JK,Seo JS

    更新日期:2006-10-01 00:00:00

  • Bacterial response to the exposure of 50 Hz electromagnetic fields.

    abstract::To investigate the ability of prokaryotic microorganisms to activate strategies in adapting themselves to the environmental stress induced by exposure to extremely low frequency electromagnetic fields (ELF-EMF), cultures of Escherichia coli ATCC 700926 exposed at 50 Hz EMF (0.1, 0.5, 1.0 mT), and the respective sham-e...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20391

    authors: Cellini L,Grande R,Di Campli E,Di Bartolomeo S,Di Giulio M,Robuffo I,Trubiani O,Mariggiò MA

    更新日期:2008-05-01 00:00:00

  • Personal dosimetry of exposure to mobile telephone base stations? An epidemiologic feasibility study comparing the Maschek dosimeter prototype and the Antennessa SP-090 system.

    abstract::The aim of our study was to test the feasibility and reliability of personal dosimetry. Twenty-four hour exposure assessment was carried out in 42 children, 57 adolescents, and 64 adults using the Maschek dosimeter prototype. Self-reported exposure to mobile phone frequencies were compared with the dosimetry results. ...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.20175

    authors: Radon K,Spegel H,Meyer N,Klein J,Brix J,Wiedenhofer A,Eder H,Praml G,Schulze A,Ehrenstein V,von Kries R,Nowak D

    更新日期:2006-01-01 00:00:00

  • ELF electromagnetic environment in power substations.

    abstract::This paper presents a theoretical analysis of electromagnetic environments in power substations in service. A new analytical method is developed and applied to magnetic field calculations in 187-kV and 66-kV substations. Experimental results verify that the method offers a good prediction of the magnetic field profile...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250100106

    authors: Hayashi N,Isaka K,Yokoi Y

    更新日期:1989-01-01 00:00:00

  • Inhibition of growth rate of Escherichia coli induced by extremely low-frequency weak magnetic fields.

    abstract::Cultures of Escherichia coli kept at 0 degree C in a phosphate buffer solution were exposed to a sinusoidal weak 60- or 600-Hz magnetic field of strength 2 X 10(-3) Tesla. A decrease of more than 40% in bacterial count was observed after a 60-h exposure to the magnetic field. Electron micrographs of exposed bacteria s...

    journal_title:Bioelectromagnetics

    pub_type: 杂志文章

    doi:10.1002/bem.2250020310

    authors: Ramon C,Ayaz M,Streeter DD Jr

    更新日期:1981-01-01 00:00:00