BioelectromagneticsThis is an RSS file. You can use it to subscribe to this data in your favourite RSS reader, such as GoogleReader, or to display this data on your own website or blog. Subscribe to this data using MyMedWorm.Subscribe to this data using GoogleReader.Subscribe to this data using Bloglines.Subscribe to this data using MyYahoo.

This page shows you the latest items in this publication.

Pages: 1 2 3 4 5 6 7

301 records returned

Corrections to "spatial gradient effects of 120 mT static magnetic field on endothelial tubular formation in vitro"Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No Abstract. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - October 31, 2009 Category: Radiology Authors: Hideyuki Okano Source Type: journals

Signal transduction of the melatonin receptor MT1 is disrupted in breast cancer cells by electromagnetic fieldsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study we investigated the impact of EMFs on the signal transduction of the high-affinity receptor MT1 in parental MCF-7 cells and MCF-7 cells transfected with the MT1 gene. The binding of the cAMP-responsive element binding (CREB) protein to a promoter sequence of BRCA-1 after stimulation with melatonin was analyzed by a gel-shift assay and the expression of four estrogen-responsive genes was measured in sham-exposed breast cancer cells and cells exposed to a sinusoidal 50 Hz EMF of 1.2 µT for 48 h. In sham-exposed cells, binding of CREB to the promoter of BRCA-1 was increased by estradiol and subsequently diminis...
Source: Bioelectromagnetics - October 30, 2009 Category: Radiology Authors: Rainer Girgert, Volker Hanf, Günter Emons, Carsten Gründker Source Type: journals

Pulsed electromagnetic fields accelerate proliferation and osteogenic gene expression in human bone marrow mesenchymal stem cells during osteogenic differentiationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we examined the effect of pulsed electromagnetic fields (PEMFs) on cell proliferation, alkaline phosphatase (ALP) activity, mineralization of the extracellular matrix, and gene expression in bone marrow mesenchymal stem cells (BMMSCs) during osteogenic differentiation. Exposure of BMMSCs to PEMFs increased cell proliferation by 29.6% compared to untreated cells at day 1 of differentiation. Semi-quantitative RT-PCR indicated that PEMFs significantly altered temporal expression of osteogenesis-related genes, including a 2.7-fold increase in expression of the key osteogenesis regulatory gene cbfa1, compared to ...
Source: Bioelectromagnetics - October 29, 2009 Category: Radiology Authors: Li-Yi Sun, Dean-Kuo Hsieh, Po-Cheng Lin, Hsien-Tai Chiu, Tzyy-Wen Chiou Source Type: journals

A model for radiofrequency electromagnetic field predictions at outdoor and indoor locations in the context of epidemiological researchEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present a geospatial model to predict the radiofrequency electromagnetic field from fixed site transmitters for use in epidemiological exposure assessment. The proposed model extends an existing model toward the prediction of indoor exposure, that is, at the homes of potential study participants. The model is based on accurate operation parameters of all stationary transmitters of mobile communication base stations, and radio broadcast and television transmitters for an extended urban and suburban region in the Basel area (Switzerland). The model was evaluated by calculating Spearman rank correlations and weighted Cohen...
Source: Bioelectromagnetics - October 15, 2009 Category: Radiology Authors: Alfred Bürgi, Patrizia Frei, Gaston Theis, Evelyn Mohler, Charlotte Braun-Fahrländer, Jürg Fröhlich, Georg Neubauer, Matthias Egger, Martin Röösli Source Type: journals

Static magnetic field exposure fails to affect the viability of different bacteria strainsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The viability of the microbes Saccharomyces cerevisiae, Bacillus circulans, Escherichia coli, Micrococcus luteus, Pseudomonas fluorescens, Salmonella enteritidis, Serratia marcescens, and Staphylococcus aureus was tested under static magnetic field exposure up to 24 h in either a homogeneous (159.2 ± 13.4 mT) or three types of inhomogeneous static magnetic fields: (i) peak-to-peak magnetic flux density 476.7 ± 0.1 mT with a lateral magnetic flux density gradient of 47.7 T/m, (ii) 12.0 ± 0.1 mT with 1.2 T/m, or (iii) 2.8 ± 0.1 mT with 0.3 T/m. Even the longest period of exposure failed to produce any effect in the growt...
Source: Bioelectromagnetics - October 9, 2009 Category: Radiology Authors: János László, József Kutasi Source Type: journals

Effects of pulsed magnetic field on the formation of magnetosomes in the Magnetospirillum sp. strain AMB-1Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, a 50 Hz, 2 mT pulsed magnetic field (PMF) was applied to study the effects on the formation of magnetosomes in Magnetospirillum sp. strain AMB-1. The results showed that the cellular magnetism (Rmag) of AMB-1 culture significantly increased while the growth of cells remained unaffected after exposure. The number of magnetic particles per cell was enhanced by about 15% and slightly increased ratios of magnetic particles of superparamagnetic property (size 50 nm) were observed after exposure to PMF. In addition, the intracellular iron accumulation slightly increased after PMF exposure. Therefore, it was conclu...
Source: Bioelectromagnetics - September 24, 2009 Category: Radiology Authors: Weidong Pan, Chuanfang Chen, Xiaoke Wang, Qiufeng Ma, Wei Jiang, Jing Lv, Long-Fei Wu, Tao Song Source Type: journals

Survey of electromagnetic field exposure in bedrooms of residences in lower AustriaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report results from spot measurements at the bedside that comprise electrostatic fields, extremely low-frequency electric fields (ELF-EFs), extremely low-frequency magnetic fields (ELF-MFs), and RF-EMFs. Measurements were taken in 226 households throughout Lower Austria. In addition, effects of simple reduction measures (e.g., removal of clock radios or increasing their distance from the bed, turning off Digital Enhanced Cordless Telecommunication (DECT) telephone base stations) were assessed. All measurements were well below International Commission on Non-Ionizing Radiation Protection (ICNIRP) guideline levels. Averag...
Source: Bioelectromagnetics - September 23, 2009 Category: Radiology Authors: Johannes Tomitsch, Engelbert Dechant, Wilhelm Frank Source Type: journals

Millimeter wave effects on electrical responses of the sural nerve in vivoEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Millimeter wave (MMW, 42.25 GHz)-induced changes in electrical activity of the murine sural nerve were studied in vivo using external electrode recordings. MMW were applied to the receptive field of the sural nerve in the hind paw. We found two types of responses of the sural nerve to MMW exposure. First, MMW exposure at the incident power density [ge]45 mW/cm2 inhibited the spontaneous electrical activity. Exposure with lower intensities (10-30 mW/cm2) produced no detectable changes in the firing rate. Second, the nerve responded to the cessation of MMW exposure with a transient increase in the firing rate. The effect las...
Source: Bioelectromagnetics - September 20, 2009 Category: Radiology Authors: Stanislav I. Alekseev, Oleg V. Gordiienko, Alexander A. Radzievsky, Marvin C. Ziskin Source Type: journals

No effects of mobile phone use on cortical auditory change-detection in children: An ERP studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We investigated the effect of mobile phone use on the auditory sensory memory in children. Auditory event-related potentials (ERPs), P1, N2, mismatch negativity (MMN), and P3a, were recorded from 17 children, aged 11-12 years, in the recently developed multi-feature paradigm. This paradigm allows one to determine the neural change-detection profile consisting of several different types of acoustic changes. During the recording, an ordinary GSM (Global System for Mobile Communications) mobile phone emitting 902 MHz (pulsed at 217 Hz) electromagnetic field (EMF) was placed on the ear, over the left or right temporal area (SA...
Source: Bioelectromagnetics - September 20, 2009 Category: Radiology Authors: Myoung Soo Kwon, Minna Huotilainen, Anna Shestakova, Teija Kujala, Risto Näätänen, Heikki Hämäläinen Source Type: journals

Comparing performances of logistic regression and neural networks for predicting melatonin excretion patterns in the rat exposed to ELF magnetic fieldsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, analysis of the bioelectromagnetic data could result in finding a relationship between electromagnetic fields and different biological processes. Bioelectromagnetics, 2009 © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 20, 2009 Category: Radiology Authors: Samad Jahandideh, Parviz Abdolmaleki, Mohammad Mehdi Movahedi Source Type: journals

Development of a higher power intermediate-frequency magnetic field exposure system for in vitro studiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This article presents the design and successful construction of the in vitro exposure system. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 16, 2009 Category: Radiology Authors: Atsushi Fujita, Yoshinobu Kawahara, Shuuki Inoue, Hideki Omori Source Type: journals

Effects of extremely low-frequency magnetic field exposure on cognitive functions: results of a meta-analysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
There is extensive literature on possible effects of extremely low-frequency magnetic fields (ELF-MFs) on human cognitive functions. However, due to methodological deficits (e.g., low statistical power, small sample sizes) findings have been inconsistent. In the current study we try to overcome these problems by carrying out a meta-analysis. Literature research revealed 17 studies. Nine of these were included in the meta-analysis because they fulfilled minimum requirements (e.g., at least single-blind experimental study design and documentation of means and standard deviation of the dependent variables). All of the studies...
Source: Bioelectromagnetics - September 14, 2009 Category: Radiology Authors: Alfred Barth, Ivo Ponocny, Elisabeth Ponocny-Seliger, Norbert Vana, Robert Winker Source Type: journals

Awarding of 2008 Most Influential Bioelectromagnetics Journal Paper by Citation AwardsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No Abstract. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 13, 2009 Category: Radiology Authors: James Lin Source Type: journals

Modification of pulse sequences reduces occupational exposure from MRI switched gradient fields: Preliminary resultsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The gradient fields in magnetic resonance imaging (MRI) will in some circumstances exceed the ICNIRP guidelines of occupational electromagnetic field exposure when personnel are near the scanner during MRI scanning. In this work we have shown that using commercially available modified sequences for noise reduction purposes, exposure will decrease by a factor of 1.5 with preserved image quality. This is a first step toward optimizing occupational exposure within the scanner room without affecting image quality. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 13, 2009 Category: Radiology Authors: Jonna Wilén, Jón Hauksson, Kjell Hansson Mild Source Type: journals

Effects of prenatal exposure to a 50-Hz magnetic field on one-trial passive avoidance learning in 1-day-old chicksEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We investigated memory impairment in newly hatched chicks following in ovo exposure to a 50-Hz magnetic field (MF) of 2 mT (60 min/day) on embryonic days 12-18. Isolated and paired chicks were used to test the effect of stress during training, and memory retention was tested at 10, 30, and 120 min, following exposure to a bitter-tasting bead (100% methylanthranilate). Results showed that memory was intact at 10 min in both isolated and paired chicks with or without MF exposure. However, while isolated chicks had good memory retention levels at 30 and 120 min, those exposed to MF did not. The results suggest a potential dis...
Source: Bioelectromagnetics - September 8, 2009 Category: Radiology Authors: Huaying Sun, Yi Che, Xiaofen Liu, Dongming Zhou, Yingda Miao, Yuanye Ma Source Type: journals

Electromagnetic and thermal evaluation of an applicator specialized to permit high-resolution non-perturbing optical evaluation of cells being irradiated in the W-bandEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To permit epi-illuminated, high-resolution optical microscopy of cells in monolayer culture during unperturbed W-band (75-110 GHz) irradiation, a new class of applicator has been developed based upon WR10 rectangular waveguide components: the cells are normally plated onto the underside of a coverslip which is then placed against the under side of a waveguide flange and receives a roughly circular exposure pattern, with the ±1 dB central spot roughly 1 mm in diameter. Constructed and tested with 94 GHz millimeter waves, water-immersion optics, and free-convection cooling, the applicator works robustly and permits SARs at ...
Source: Bioelectromagnetics - September 3, 2009 Category: Radiology Authors: William F. Pickard, Eduardo G. Moros, Gal Shafirstein Source Type: journals

Lack of a co-promotion effect of 60 Hz circularly polarized magnetic fields on spontaneous development of lymphoma in AKR miceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, there was no evidence that exposure to 60 Hz circularly polarized MF strengths up to 500 µT promoted lymphoma in AKR mice. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 30, 2009 Category: Radiology Authors: Moon-Koo Chung, Wook-Joon Yu, Yong-Bum Kim, Sung-Ho Myung Source Type: journals

Exposure of non-target tissues in medical diathermyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
With different prevalence in different regions, radio frequency (RF) electromagnetic fields (EMF) are widely used for therapeutic tissue heating. Although short-wave diathermy (27.12 MHz) is the most popular treatment modality, quantitative data on patient's exposure have been lacking. By numerical simulation with the numerical anatomical model NORMAN, intracorporal distributions of specific absorption rates (SAR) were investigated for different treatment scenarios and applicators. Quantitative data are provided for exposures of target treatment areas as well as for vulnerable regions such as the eye lenses, central nervou...
Source: Bioelectromagnetics - August 26, 2009 Category: Radiology Authors: N. Leitgeb, A. Omerspahic, F. Niedermayr Source Type: journals

Idiopathic environmental intolerance attributed to electromagnetic fields (formerly 'electromagnetic hypersensitivity'): An updated systematic review of provocation studiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Idiopathic Environmental Intolerance attributed to electromagnetic fields (IEI-EMF; formerly 'electromagetic hypersensitivity') is a medically unexplained illness in which subjective symptoms are reported following exposure to electrical devices. In an earlier systematic review, we reported data from 31 blind provocation studies which had exposed IEI-EMF volunteers to active or sham electromagnetic fields and assessed whether volunteers could detect these fields or whether they reported worse symptoms when exposed to them. In this article, we report an update to that review. An extensive literature search identified 15 new...
Source: Bioelectromagnetics - August 13, 2009 Category: Radiology Authors: G. James Rubin, Rosa Nieto-Hernandez, Simon Wessely Source Type: journals

Acceleration of germination and early growth of wheat and bean seedlings grown under various magnetic field and osmotic conditionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study reports the effects of different intensities of static MF (4 or 7 mT) on seed germination and seedling growth of bean or wheat seeds in different media having 0, 2, 6, and 10 atmosphere (atm) osmotic pressure prepared with sucrose or salt. The germination percentages of the treated seeds were compared with untreated seeds germinated in different osmotic pressure during 7 days of incubation. The application of both MFs promoted the germination ratios of bean and wheat seeds, regardless of increasing osmotic pressure of sucrose or salt. Growth data measured on the 7th day showed that the treated plants grew faster...
Source: Bioelectromagnetics - August 12, 2009 Category: Radiology Authors: Turgay Cakmak, Rahmi Dumlupinar, Serkan Erdal Source Type: journals

Pulsed electromagnetic fields stimulation affects BMD and local factor production of rats with disuse osteoporosisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Pulsed electromagnetic fields (PEMF) have been used widely to treat nonunion fractures and related problems in bone healing, as a biological and physical method. With the use of Helmholtz coils and PEMF stimulators to generate uniform time-varying electromagnetic fields, the effects of extremely low frequency electromagnetic fields on bone mineral density (BMD) and local factor production in disuse osteoporosis (DOP) rats were investigated. Eighty 4-month-old female Sprague Dawley (SD) rats were randomly divided into intact (INT) group, DOP group, calcitonin-treated (CT) group, and PEMF stimulation group. The right hindlim...
Source: Bioelectromagnetics - August 10, 2009 Category: Radiology Authors: Wei-Wei Shen, Jian-Hua Zhao Source Type: journals

Extremely low frequency electric fields and cancer: Assessing the evidenceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Much of the research and reviews on extremely low frequency (ELF) electric and magnetic fields (EMFs) have focused on magnetic rather than electric fields. Some have considered such focus to be inappropriate and have argued that electric fields should be part of both epidemiologic and laboratory work. This paper fills the gap by systematically and critically reviewing electric-fields literature and by comparing overall strength of evidence for electric versus magnetic fields. The review of possible mechanisms does not provide any specific basis for focusing on electric fields. While laboratory studies of electric fields ar...
Source: Bioelectromagnetics - July 31, 2009 Category: Radiology Authors: Leeka Kheifets, David Renew, Glenn Sias, John Swanson Source Type: journals

1950 MHz IMT-2000 field does not activate microglial cells in vitroEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Given the widespread use of the cellular phone today, investigation of potential biological effects of radiofrequency (RF) fields has become increasingly important. In particular, much research has been conducted on RF effects on brain function. To examine any biological effects on the central nervous system (CNS) induced by 1950 MHz modulation signals, which are controlled by the International Mobile Telecommunication-2000 (IMT-2000) cellular system, we investigated the effect of RF fields on microglial cells in the brain. We assessed functional changes in microglial cells by examining changes in immune reaction-related m...
Source: Bioelectromagnetics - July 30, 2009 Category: Radiology Authors: Hideki Hirose, Atsushi Sasaki, Nana Ishii, Masaru Sekijima, Takahiro Iyama, Toshio Nojima, Yoshikazu Ugawa Source Type: journals

Mobile telephone use is associated with changes in cognitive function in young adolescentsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
As part of the Mobile Radiofrequency Phone Exposed Users' Study (MoRPhEUS), a cross-sectional epidemiological study examined cognitive function in secondary school students. We recruited 317, 7th grade students (144 boys, 173 girls, median age 13 years) from 20 schools around Melbourne, Australia. Participants completed an exposure questionnaire based on the Interphone study, a computerised cognitive test battery, and the Stroop colour-word test. The principal exposure metric was the total number of reported mobile phone voice calls per week. Linear regression models were fitted to cognitive test response times and accurac...
Source: Bioelectromagnetics - July 30, 2009 Category: Radiology Authors: Michael J. Abramson, Geza P. Benke, Christina Dimitriadis, Imo O. Inyang, Malcolm R. Sim, Rory S. Wolfe, Rodney J. Croft Source Type: journals

Extremely low frequency pulsed electromagnetic field designed for antinociception does not affect microvascular responsiveness to the vasodilator acetylcholineEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A 225 µT, extremely low frequency, pulsed electromagnetic field (PEMF) that was designed for the induction of antinociception, was tested for its effectiveness to influence blood flow within the skeletal microvasculature of a male Sprague-Dawley rat model (n = 103). Acetylcholine (0.1, 1.0, or 10 mM) was used to perturb normal blood flow and to delineate differential effects of the PEMF, based on degree of vessel dilation. After both 30 and 60 min of PEMF exposure, we report no effects on peak perfusion response to acetylcholine (with only 0.2% of the group difference attributed to exposure). Spectral analysis of blood fl...
Source: Bioelectromagnetics - July 29, 2009 Category: Radiology Authors: Julia C. McKay, Michael Corbacio, Karel Tyml, Frank S. Prato, Alex W. Thomas Source Type: journals

Response to Comment on Vali[ccaron] et al., 2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No Abstract. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 26, 2009 Category: Radiology Authors: Bla[zcaron] Vali[ccaron], Peter Gaj[scaron]ek, Damijan Miklav[ccaron]i[ccaron] Source Type: journals

Effects of extremely low-frequency magnetic fields on the oviposition of Drosophila melanogaster over three generationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to determine the effects of an extremely low-frequency 50 Hz magnetic field (ELFMF) on the oviposition and development of Drosophila melanogaster. The results show that exposure of D. melanogaster females of generation P and all the development stages of generation F1 to an ELFMF weakened the oviposition of these insects in their subsequent generations. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 23, 2009 Category: Radiology Authors: Boles[lstrok]aw Gonet, Danuta I. Kosik-Bogacka, Wanda Ku[zacute]na-Grygiel Source Type: journals

A biofilm growth protocol and the design of a magnetic field exposure setup to be used in the study of magnetic fields as a means of controlling bacterial biofilmsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This article addresses both of these points. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 22, 2009 Category: Radiology Authors: Bruce R. McLeod, Elizabeth L. Sandvik Source Type: journals

No effects of mobile phone electromagnetic field on auditory brainstem responseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The present study investigated the possible effects of the electromagnetic field (EMF) emitted by an ordinary GSM mobile phone (902.4 MHz pulsed at 217 Hz) on brainstem auditory processing. Auditory brainstem responses (ABR) were recorded in 17 healthy young adults, without a mobile phone at baseline, and then with a mobile phone on the ear under EMF-off and EMF-on conditions. The amplitudes, latencies, and interwave intervals of the main ABR components (waves I, III, V) were compared among the three conditions. ABR waveforms showed no significant differences due to exposure, suggesting that short-term exposure to mobile p...
Source: Bioelectromagnetics - July 16, 2009 Category: Radiology Authors: Myoung-Soo Kwon, Satu K. Jääskeläinen, Tim Toivo, Heikki Hämäläinen Source Type: journals

Comment on Vali[ccaron] et al., 2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No Abstract. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 14, 2009 Category: Radiology Authors: John Swanson Source Type: journals

Exposure to high static or pulsed magnetic fields does not affect cellular processes in the yeast Saccharomyces cerevisiaeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report results of a study of the effects of strong static (up to 16 T for 8 h) and pulsed (up to 55 T single-shot and 4 × 20 T repeated shots) magnetic fields on Saccharomyces cerevisiae cultures in the exponential phase of growth. In contrast to previous reports restricted to only a limited number of cellular parameters, we have examined a wide variety of cellular processes: genome-scale gene expression, proteome profile, cell viability, morphology, and growth, metabolic and fermentation activity after magnetic field exposure. None of these cellular activities were impaired in response to static or pulsed magnetic fie...
Source: Bioelectromagnetics - July 13, 2009 Category: Radiology Authors: Veronique Anton-Leberre, Evert Haanappel, Nathalie Marsaud, Lidwine Trouilh, Laurent Benbadis, Helian Boucherie, Sophie Massou, Jean M. François Source Type: journals

The association between socioeconomic status and exposure to mobile telecommunication networks in children and adolescentsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A potential association between socioeconomic status (SES) and self-reported use of mobile phones has been investigated in a few studies. If measured exposure to mobile phone networks differs by SES in children, it has not yet been studied. Interview data of 1,481 children and 1,505 adolescents on participants' mobile phone use, socio-demographic characteristics and potential confounders were taken from the German MobilEe-study. Sociodemographic data was used to stratify participants into three "status groups" (low, middle, high). Using a personal dosimeter, we obtained an exposure profile over 24 h for each of the partici...
Source: Bioelectromagnetics - July 12, 2009 Category: Radiology Authors: Silke Thomas, Sabine Heinrich, Anja Kühnlein, Katja Radon Source Type: journals

Neurobiological effects of pulsed magnetic field on diabetes-induced neuropathyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, the effects of PMF treatment were investigated in Streptozotocin (STZ)-induced acute and chronic diabetic rats by measuring the thermal latencies, mechanical thresholds, whole blood glucose levels and body weights. After STZ administration to rats, blood glucose level elevated and body weight decreased. Although PMF treatment did not affect changes in body weight, the blood glucose levels of PMF-treated diabetic rats exhibited a decrease during the treatments. Diabetic animals displayed marked decrease in mechanical thresholds and thermal latencies. While treatment of PMF partially restored the mechanical th...
Source: Bioelectromagnetics - July 10, 2009 Category: Radiology Authors: Tufan Mert, Ismail Gunay, Isil Ocal Source Type: journals

Cytoskeletal forces produced by extremely low-frequency electric fields acting on extracellular glycoproteinsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This article establishes for the first time a direct, quantitative model that links the field to cytoskeletal forces. In a previous article, applied electric fields of physiological strength were shown to produce significant mechanical torques at the cellular level. In this article, the corresponding forces exerted on the cytoskeleton are computed and found to be comparable in magnitude to mechanical forces known to produce physiological effects. In addition to the electrical force, the viscous drag force exerted by the surrounding medium and the restoring force exerted by the neighboring structures are considered in the a...
Source: Bioelectromagnetics - July 9, 2009 Category: Radiology Authors: Francis X. Hart Source Type: journals

Behavioral change related to Wenchuan devastating earthquake in miceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
It has been suggested that some animals are much more capable of perceiving certain kinds of geophysical stimuli which may precede earthquakes than humans, but the anecdotal phenomena or stories about unusual animal behaviors prior to an earthquake should be interpreted with objective data. During the Wenchuan magnitude 8.0 earthquake that happened in Wenchuan county (31.0° north latitude, 103.4° east longitude) of Sichuan province, China, on May 12, 2008, eight mice were monitored for locomotor activity and circadian rhythm in constant darkness with temperature 22-24 °C and humidity 55-65% for 38 days. The ongoing moni...
Source: Bioelectromagnetics - July 4, 2009 Category: Radiology Authors: Yonghong Li, Yanyou Liu, Zhou Jiang, Junwen Guan, Guixi Yi, Shuting Cheng, Bo Yang, Tianming Fu, Zhengrong Wang Source Type: journals

Changes in synaptic efficacy and seizure susceptibility in rat brain slices following extremely low-frequency electromagnetic field exposureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The effects of electromagnetic fields (EMFs) on living organisms are recently a focus of scientific interest, as they may influence everyday life in several ways. Although the neural effects of EMFs have been subject to a considerable number of investigations, the results are difficult to compare since dissimilar exposure protocols have been applied on different preparations or animals. In the present series of experiments, whole rats or excised rat brain slices were exposed to a reference level-intensity (250-500 µT, 50 Hz) EMF in order to examine the effects on the synaptic efficacy in the central nervous system. Electr...
Source: Bioelectromagnetics - June 30, 2009 Category: Radiology Authors: Petra Varró, Renáta Szemerszky, György Bárdos, Ildikó Világi Source Type: journals

The relation between the specific absorption rate and electromagnetic field intensity for heterogeneous exposure conditions at mobile communications frequenciesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The relation between the incident electromagnetic field strength and both the whole-body and the local specific absorption rate (SAR) was investigated for typical heterogeneous exposure scenarios for frequencies relevant for mobile communication. The results were compared to results from plane wave exposure. Heterogeneous exposure arises from multiple path propagation of the electromagnetic waves to the location of interest. It is shown that plane wave exposure does not represent worst-case exposure conditions. When the electric field strength arising at plane wave exposure is compared to the electric field strength averag...
Source: Bioelectromagnetics - June 24, 2009 Category: Radiology Authors: Georg Neubauer, Patrick Preiner, Stefan Cecil, Niki Mitrevski, Johannes Gonter, Heinrich Garn Source Type: journals

Hypersensitivity to RF fields emitted from CDMA cellular phones: A provocation studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, RF exposure did not have any effects on physiological parameters or subjective symptoms in either group. As for EMF perception, there was no evidence that the EHS group better perceived EMF than the non-EHS group. Bioelectromagnetics, 2009 © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - June 22, 2009 Category: Radiology Authors: Ki Chang Nam, Ju Hyung Lee, Hyung Wook Noh, Eun Jong Cha, Nam Hyun Kim, Deok Won Kim Source Type: journals

The influence of pulsed magnetic fields (PMFs) on nonsynaptic potentials recorded from the central and peripheral nervous systems in vitroEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The influence of pulsed magnetic fields (PMFs) on nonsynaptic potentials recorded from the central and peripheral nervous system in vitro has been investigated. The population spikes (PSs) recorded from hippocampal slices during antidromic stimulation and compound action potentials (CAPs) recorded from the segments of the sciatic nerve were used as indicators of neuronal activity. The potentials recorded from both preparations were significantly and permanently enhanced following PMF (0.16 Hz, 15 mT) exposure. The increase in the antidromic PS occurred even in the presence of potassium channel blocker tetraethylammonium (T...
Source: Bioelectromagnetics - June 22, 2009 Category: Radiology Authors: Zaghloul Ahmed, Andrzej Wieraszko Source Type: journals

Low-intensity microwave irradiation does not substantially alter gene expression in late larval and adult Caenorhabditis elegansEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study used a microwave exposure system (1.0 GHz, 0.5 W power input; SAR 0.9-3 mW kg-1 for 6-well plates) that minimises temperature differentials between sham and exposed conditions ([le]0.1 °C). Parallel measurement and simulation studies of SAR distribution within this exposure system are presented. We compared five Affymetrix gene arrays of pooled triplicate RNA populations from sham-exposed L4/adult worms against five gene arrays of pooled RNA from microwave-exposed worms (taken from the same source population in each run). No genes showed consistent expression changes across all five comparisons, and all express...
Source: Bioelectromagnetics - June 17, 2009 Category: Radiology Authors: Adam S. Dawe, Rakesh K. Bodhicharla, Neil S. Graham, Sean T. May, Tom Reader, Benjamin Loader, Andrew Gregory, Mays Swicord, Giorgi Bit-Babik, David I. de Pomerai Source Type: journals

Application of a temperature-dependent fluorescent dye (Rhodamine B) to the measurement of radiofrequency radiation-induced temperature changes in biological samplesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We have applied a non-contact method for studying the temperature changes produced by radiofrequency (RF) radiation specifically to small biological samples. A temperature-dependent fluorescent dye, Rhodamine B, as imaged by laser scanning confocal microscopy (LSCM) was used to do this. The results were calibrated against real-time temperature measurements from fiber optic probes, with a calibration factor of 3.4% intensity change °C-1 and a reproducibility of ±6%. This non-contact method provided two-dimensional and three-dimensional images of temperature change and distributions in biological samples, at a spatial reso...
Source: Bioelectromagnetics - June 9, 2009 Category: Radiology Authors: Yuen Y. Chen, Andrew W. Wood Source Type: journals

Enhancement of the hydrolysis activity of F0F1-ATPases using 60 Hz magnetic fieldsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The effects of extremely low frequency (ELF) magnetic fields on membrane F0F1-ATPase activity have been studied. When the F0F1-ATPase was exposed to 60 Hz magnetic fields of different magnetic intensities, 0.3 and 0.5 mT magnetic fields enhanced the hydrolysis activity, whereas 0.1 mT exposure caused no significant changes. Even if the F0F1-ATPase was inhibited by N,N-dicyclohexylcarbodiimide, its hydrolysis activity was enhanced by a 0.5 mT 60 Hz magnetic field. Moreover, when the chromatophores which were labeled with F-DHPE were exposed to a 0.5 mT, 60 Hz magnetic field, it was found that the pH of the outer membrane of...
Source: Bioelectromagnetics - June 5, 2009 Category: Radiology Authors: Chuanfang Chen, Yuanbo Cui, Jiachang Yue, Xiaolin Huo, Tao Song Source Type: journals

Lack of chick embryotoxicity after 20 kHz, 1.1 mT magnetic field exposureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This investigation was undertaken because biological studies to evaluate the effects of intermediate frequency magnetic fields are insufficient. White Leghorn fertile eggs (60/group) were either exposed to a 20 kHz, 1.1 mT(rms) sinusoidal magnetic field or sham-exposed during the first 2, 7, or 11 days of embryogenesis. Lower dose exposures at 0.011 and 0.11 mT(rms) for 2 days were also conducted to elucidate possible dose-response relationships. Additional eggs given all-trans-retinoic acid, a teratogen, were exposed to the 1.1 mT(rms) magnetic field for the same periods to investigate the modification of embryotoxicity. ...
Source: Bioelectromagnetics - June 3, 2009 Category: Radiology Authors: Izumi Nishimura, Setsuo Imai, Tadashi Negishi Source Type: journals

Effect of radiofrequency electromagnetic field exposure on in vitro models of neurodegenerative diseaseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this work we tested viability, proliferation, and vulnerability of neural cells, after continuous radiofrequency (RF) electromagnetic fields exposure (global system for mobile telecommunications (GSM) modulated 900 MHz signal at a specific absorption rate (SAR) of 1 W/kg and maximum duration 144 h) generated by transverse electromagnetic cells. We used two cellular systems, SN56 cholinergic for example, SN56 cholinergic cell line and rat primary cortical neurons, and well-known neurotoxic challenges, such as glutamate, 25-35AA beta-amyloid, and hydrogen peroxide. Exposure to RF did not change viability/proliferation rat...
Source: Bioelectromagnetics - May 30, 2009 Category: Radiology Authors: Giovanna Del Vecchio, Alessandro Giuliani, Mercedes Fernandez, Pietro Mesirca, Ferdinando Bersani, Rosanna Pinto, Lucia Ardoino, Giorgio A. Lovisolo, Luciana Giardino, Laura Calzaà Source Type: journals

Electromagnetic fields and epidemiology: An overview inspired by the fourth course at the International School of BioelectromagneticsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, epidemiological studies conducted with appropriate diligence can play a key role in finding the answers. Bioelectromagnetics, 2009. © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - May 28, 2009 Category: Radiology Authors: Joachim Schüz, Susanna Lagorio, Ferdinando Bersani Source Type: journals

The role of the concentration and distribution of water in the complex permittivity of breast fat tissueEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The structure of breast tissue is complicated and highly variable and presents a great challenge in the development of physical models that may be used to obtain its effective complex permittivity. Empirical models are commonly used by researchers to fit measured data and extrapolated to higher frequencies. However, these models have not been verified experimentally at higher frequencies. Theoretical models of tissue permittivity to explain the role of water are not available today. This communication is a systematic study of several models to estimate the complex permittivity of breast fat tissue based on volume content a...
Source: Bioelectromagnetics - May 28, 2009 Category: Radiology Authors: Tarek Said, Vasundara V. Varadan Source Type: journals

Reactive oxygen species formation is not enhanced by exposure to UMTS 1950 MHz radiation and co-exposure to ferrous ions in Jurkat cellsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study was designed to assess if radiofrequency (RF) radiation induces oxidative stress in cultured mammalian cells when given alone or in combination with ferrous ions (FeSO4). For this purpose the production of reactive oxygen species (ROS) was measured by flow cytometry in human lymphoblastoid cells exposed to 1950 MHz signal used by the third generation wireless technology of the Universal Mobile Telecommunication System (UMTS) at Specific Absorption Rate of 0.5 and 2.0 W/kg. Short (5-60 min) or long (24 h) duration exposures were carried out in a waveguide system under strictly controlled conditions of both dosime...
Source: Bioelectromagnetics - May 27, 2009 Category: Radiology Authors: Francesca Brescia, Maurizio Sarti, Rita Massa, Maria L. Calabrese, Anna Sannino, Maria R. Scarfì Source Type: journals

Effects of W-CDMA 1950 MHz EMF emitted by mobile phones on regional cerebral blood flow in humansEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Use of the third generation mobile phone system is increasing worldwide. This is the first study to investigate the effects of the third generation system on regional cerebral blood flow (rCBF) in humans. We compared effects of the electromagnetic field (EMF) emitted from the Wideband Code Division Multiple Access (W-CDMA) cellular system versus sham control exposure on rCBF in humans. Nine healthy male volunteers participated in this study. Positron emission tomography (PET) scans were obtained before, during, and after unilateral 30 min EMF exposure. The subtraction analysis revealed no significant rCBF changes caused by...
Source: Bioelectromagnetics - May 27, 2009 Category: Radiology Authors: Yoko Mizuno, Yoshiya Moriguchi, Takashi Hikage, Yasuo Terao, Takashi Ohnishi, Toshio Nojima, Yoshikazu Ugawa Source Type: journals

Large gradient high magnetic field affects the association of MACF1 with actin and microtubule cytoskeletonEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In conclusion, LG-HMF affects osteoblast-like cell viability, MACF1 distribution, expression, and its association with cytoskeleton to some extent. Bioelectromagnetics, 2009 © 2009 Wiley-Liss, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - May 27, 2009 Category: Radiology Authors: Ai-Rong Qian, Li-Fang Hu, Xiang Gao, Wei Zhang, Sheng-Meng Di, Zong-Cheng Tian, Peng-Fei Yang, Da-Chuan Yin, Yuan-Yuan Weng, Peng Shang Source Type: journals

Short-term exposure to mobile phone base station signals does not affect cognitive functioning or physiological measures in individuals who report sensitivity to electromagnetic fields and controlsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Individuals who report sensitivity to electromagnetic fields often report cognitive impairments that they believe are due to exposure to mobile phone technology. Previous research in this area has revealed mixed results, however, with the majority of research only testing control individuals. Two studies using control and self-reported sensitive participants found inconsistent effects of mobile phone base stations on cognitive functioning. The aim of the present study was to clarify whether short-term (50 min) exposure at 10 mW/m2 to typical Global System for Mobile Communication (GSM) and Universal Mobile Telecommunicatio...
Source: Bioelectromagnetics - May 27, 2009 Category: Radiology Authors: Stacy Eltiti, Denise Wallace, Anna Ridgewell, Konstantina Zougkou, Riccardo Russo, Francisco Sepulveda, Elaine Fox Source Type: journals