Abstract:
:A 275-MHz exposure system, consisting of a circular waveguide irradiator and a transparent plastic animal cage, has been developed to accommodate rhesus monkeys weighing up to 15 kg. The vertically oriented waveguide is composed primarily of stainless steel and is fitted with an inner cage fabricated from a tubular section of acrylic plastic. Circularly polarized electromagnetic energy at 275 MHz, either pulsed or continuous wave (CW), can be propagated from the removable top section of the waveguide. The cage is designed to function as the monkey's permanent home. It is fitted with a lever-actuated behavioral performance device on which the monkey responds according to a predetermined schedule to obtain a daily food ration. The system can be adapted to provide for the collection of metabolic and physiologic data as well. Dosimetric measurements were conducted with six rhesus monkeys weighing 3.0-7.2 kg and with a 4-kg model. The dosimetric results show that about one-third of the net incident energy is absorbed by a subject in this system at a normalized specific absorption rate (SAR) of 0.33 (W/kg)/(mW/cm2).
journal_name
Bioelectromagneticsjournal_title
Bioelectromagneticsauthors
Olsen RG,de Lorge JO,Forstall JR,Ezell CSdoi
10.1002/bem.2250050109subject
Has Abstractpub_date
1984-01-01 00:00:00pages
79-88issue
1eissn
0197-8462issn
1521-186Xjournal_volume
5pub_type
杂志文章abstract::Vertigo-like sensations or apparent perception of movement are reported by some subjects and operators in and around high field whole body magnetic resonance body scanners. Induced currents (which modulate the firing rate of the vestibular hair cell), magneto-hydrodynamics (MDH), and tissue magnetic susceptibility dif...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20316
更新日期:2007-07-01 00:00:00
abstract::The effects of exposure to a 50 Hz magnetic field (maximum of 41.7 to 43.6 mT) on the membrane protein structures of living HeLa cells were studied using attenuated total reflection infrared spectroscopy. One min of such exposure shifted peak absorbance of the amide I band to a smaller wave number, reduced peak absorb...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.10120
更新日期:2003-10-01 00:00:00
abstract::Despite experimental evidence supporting ICR-like interactions in biological systems, to date there is no reasonable theoretical explanation for this phenomenon. The parametric resonance approach introduced by Lednev has enjoyed limited success in predicting the response as a function of the ratio of AC magnetic inten...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20406
更新日期:2008-07-01 00:00:00
abstract::Both eyes of anesthetized cynomolgus monkeys (Macaca fascicularis) were irradiated with 2.45-GHz microwaves, either pulsed or continuous wave. In vivo corneal endothelial abnormalities were observed by specular microscopy and confirmed through histologic techniques after a 16- to 48-hour postexposure period. Pulsed mi...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250060209
更新日期:1985-01-01 00:00:00
abstract::Extremely-low-frequency (ELF) and very-low-frequency (VLF) magnetic fields as emitted by monochrome and multichrome video display units (VDUs) were measured for their frequency domains. The rms magnetic-flux densities (MFDs) were measured as a function of distance from all six sides of VDUs of four types. The MFDs at ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250120106
更新日期:1991-01-01 00:00:00
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
更新日期:2006-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章,随机对照试验
doi:10.1002/bem.22005
更新日期:2017-02-01 00:00:00
abstract::To characterize the inhibitory effect of a static magnetic field, action potentials (AP) were elicited by intracellular application of 1 ms depolarizing current pulses of constant amplitude to the somata of adult mouse dorsal root ganglion neurons in monolayer dissociated cell culture. During the control period, < 5% ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250160108
更新日期:1995-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.10186
更新日期:2004-04-01 00:00:00
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
更新日期:2009-04-01 00:00:00
abstract::We have studied the effect of extremely low frequency electromagnetic fields (ELF-EMF) in the presence of a second stressor (mild heat shock) on the expression of a lacZ reporter gene under the control of hsp16 or hsp70 promoters in two transgenic strains of C. elegans. The expression of the reporter gene was studied ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/(sici)1521-186x(200002)21:2<100::aid-bem4>
更新日期:2000-02-01 00:00:00
abstract::Rat PC12 pheochromocytoma cells have been treated with nerve growth factor and then exposed to athermal levels of a packet-modulated radiofrequency field at 836.55 MHz. This signal was produced by a prototype time-domain multiple-access (TDMA) transmitter that conforms to the North American digital cellular telephone ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/(sici)1521-186x(1997)18:3<223::aid-bem4>3.
更新日期:1997-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21744
更新日期:2013-01-01 00:00:00
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 ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250060108
更新日期:1985-01-01 00:00:00
abstract::The effects of exposure to clinical magnetic resonance imaging (MRI) on analgesia induced by the mu opiate agonist, fentanyl, was examined in mice. During the dark period, adult male mice were exposed for 23.2 min to the time-varying (0.6 T/sec) magnetic field (TVMF) component of the MRI procedure. Following this expo...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250090208
更新日期:1988-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250060406
更新日期:1985-01-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20568
更新日期:2010-07-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20005
更新日期:2004-07-01 00:00:00
abstract::Possible effects of 1439 MHz electromagnetic near field (EMF) exposure on the blood-brain barrier (BBB) were investigated using immature (4 weeks old) and young (10 weeks old) rats, equivalent in age to the time when the BBB development is completed and the young adult, respectively. Alteration of BBB related genes, s...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20138
更新日期:2005-10-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250140303
更新日期:1993-01-01 00:00:00
abstract::Most of the research concerning magnetic antinociception was focused on brief exposure less than 1 h. The main purpose of the present study was to determine the effect of extremely low frequency (ELF) magnetic field (MF) repeated exposures on rats in inducing antinociception and to find the effective analgesic "time w...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20232
更新日期:2006-09-01 00:00:00
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journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250160710
更新日期:1995-01-01 00:00:00
abstract::Effects of magnetic fields (MFs) on the activities of antioxidant enzymes of suspension-cultured tobacco cells were investigated. Compared with the control cells, exposure of the cells to static MF with the magnitudes of 10 and 30 mT for 5 days, 5 h each day, increased the activity of superoxide dismutase (SOD). In co...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20262
更新日期:2007-01-01 00:00:00
abstract::Hyperthermia has been used in conjunction with radiation and chemotherapy for cancer treatment. When using electromagnetic heating, applicators are critical components in contact with or in proximity to patients and can be the determining factor for effective and safe treatment. Tissue absorption of electromagnetic en...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250130612
更新日期:1992-01-01 00:00:00
abstract::We conducted a pilot study to assess magnetic field levels in electric compared to gasoline-powered vehicles, and established a methodology that would provide valid data for further assessments. The sample consisted of 14 vehicles, all manufactured between January 2000 and April 2009; 6 were gasoline-powered vehicles ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21730
更新日期:2013-02-01 00:00:00
abstract::In the present experiment, the effect of a single 30 min inhomogeneous static magnetic field (SMF) exposure on thermal pain threshold (TPT) was examined in 15 young healthy human volunteers. The SMF had a maximum peak-to-peak amplitude of 330 mT with a maximum gradient of 13.2 T/m. In either of two experimental sessio...
journal_title:Bioelectromagnetics
pub_type: 杂志文章,随机对照试验
doi:10.1002/bem.20622
更新日期:2011-02-01 00:00:00
abstract::The current through the residential grounding circuit is an important source for magnetic fields; field variations near the grounding circuit accurately track fluctuations in this ground current. In this paper, a model is presented which permits calculation of the range of these fluctuations. A discrete network model ...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.2250150109
更新日期:1994-01-01 00:00:00
abstract::This study analyzes if an external magnetic stimulus (2 kHz and approximately 0.1 μT applied near frontal cortex) influences working memory, perception, binary decision, motor execution, and sustained attention in humans. A magnetic stimulus and a sham stimulus were applied to both sides of the head (frontal cortex cl...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.21944
更新日期:2016-01-01 00:00:00
abstract::Experiments were conducted to see whether the cellular response to electromagnetic (EM) fields occurs through a detection process involving temporal sensing. L929 cells were exposed to 60 Hz magnetic fields and the enhancement of ornithine decarboxylase (ODC) activity was measured to determine cellular response to the...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/(sici)1521-186x(1997)18:5<388::aid-bem6>3.
更新日期:1997-01-01 00:00:00
abstract::The goal of the research reported here is to narrow the range of uncertainty about peripheral nerve stimulation (PNS) thresholds associated with whole body magnetic field exposures at 50/60 Hz. This involved combining PNS thresholds measured in human subjects exposed to pulsed magnetic gradient fields with calculation...
journal_title:Bioelectromagnetics
pub_type: 杂志文章
doi:10.1002/bem.20106
更新日期:2005-09-01 00:00:00