Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing all 6,486 studies
Al-Dousary SH. · 2007
The study aimed to observe mobile phone induced sensorineural hearing loss. A case of sensorineural hearing loss due to Global System for Mobile Communications mobile phone use in a 42-year-old male was reported.
Alanko T, Hietanen M · 2007
Researchers assessed worker exposure to radiofrequency fields in two medium-sized antenna towers. The towers had transmitting antennas from mobile phone networks, radio, digital TV sub-stations, and amateur radio. Measurements were taken close to the tower ladders. All measured values were below ICNIRP occupational reference levels.
Guney M, Ozguner F, Oral B, Karahan N, Mungan T. · 2007
Rats were randomly assigned to four groups of eight each, including a control, a sham, a 900 MHz EMR exposure group, and an EMR plus vitamins E and C group, and the EMR groups received 30 minutes per day for 30 days. EMR exposure increased endometrial nitric oxide and malondialdehyde levels and decreased superoxide dismutase, catalase, and glutathione peroxidase activities, while combined vitamins E and C reversed these changes. The EMR group showed diffuse severe apoptosis in endometrial epithelial, glandular, and stromal cells and diffuse eosinophilic leucocyte and lymphocyte infiltration, which were significantly reduced by vitamins E and C.
Friedman J, Kraus S, Hauptman Y, Schiff Y, Seger R. · 2007
Elhag MA, Nabil GM, Attia AM. · 2007
Rats were divided into control, fractionated exposure (15 min/day for four days), and acute exposure groups. Plasma vitamin C decreased by 47% in fractionated group and 59.8% in acute group compared to controls. Vitamin E decreased by 33% and 65.8%, and vitamin A by 44.4% and 46.8% in fractionated and acute groups respectively. Reduced glutathione dropped by 19.8% and 35.3% in fractionated and acute groups. Catalase and superoxide dismutase activities decreased significantly, with acute group lower than fractionated group.
Calota V, Dragoiu S, Meghea A, Giurginca M. · 2007
The study evaluated the effects of 50 Hz magnetic fields at different intensities on chemiluminescence intensity of human serum. Exposure for 1 and 2 h increased chemiluminescence emission, and adding prooxidants FeCl(2) and H(2)O(2) in different concentrations increased chemiluminescence intensity even more.
Zhao TY, Zou SP, Knapp PE. · 2007
Researchers exposed primary cultured neurons and astrocytes to GSM cell phone emissions at 1900 MHz for 2 hours. Neurons showed up-regulation of caspase-2, caspase-6, and Asc genes in both 'on' and 'stand-by' modes. Astrocytes showed up-regulation of the same genes only in 'on' mode and also up-regulated the Bax gene.
Vecchio F et al. · 2007
Ten subjects underwent two EEG recordings separated by one week in a crossover double-blind paradigm. The mobile phone was held on the left side of the head by a modified helmet. Each session lasted 45 minutes with real GSM exposure in one session and sham in the other. GSM stimulation modulated interhemispheric frontal and temporal coherence at alpha2 and alpha3 bands compared to sham.
Parazzini M et al. · 2007
Researchers exposed 26 healthy young volunteers to 900 MHz GSM phone radiation and sham exposure in separate double-blind sessions. A rest-to-stand protocol assessed autonomic nervous system function during rest and after sympathetic activation. No statistically significant effect of EMF exposure was found on the main RR mean or most other heart rate variability parameters. A weak interaction between some time and frequency domain HRV parameters and RF exposure was observed around the sympathetic response to standing.
Barcal J, Vozeh F · 2007
ECoG evaluation showed a distinct shift to lower frequency components in wild type mice but only gentle differences in Lurcher mutant mice. Hippocampal rhythmicity showed gentle changes with increase of higher frequencies and changes in theta oscillations in both healthy and mutant mice.
Abdel-Rassoul G et al. · 2007
A cross-sectional study enrolled 85 residents living near a mobile phone base station in Egypt and 80 matched controls. Exposed residents reported significantly higher rates of headache, memory changes, dizziness, tremors, depressive symptoms, and sleep disturbance than controls. On neurobehavioral testing, exposed residents performed worse on a test of attention and short-term auditory memory but better on tests of visuomotor speed and attention. Residents living opposite the station performed worse on a problem-solving test than those living under the station. Measured radiofrequency radiation levels were below the allowable standard.
Wang KJ, Yao K, Lu DQ. · 2007
Tillmann T et al. · 2007
Researchers exposed 1170 B6C3F1 mice to GSM signals at 902 MHz and DCS signals at 1747 MHz for 2 h per day, 5 days per week over 2 years at SAR levels of 0.4, 1.3, and 4.0 mW/g. Pairwise Fisher's test showed no significant increase in any tumor type in RF-exposed groups compared to sham-exposed groups. Observed tumor rates were within the range of historical control data for untreated mice.
Sage C, Johansson O, Sage SA · 2007
Li BF, Guo GZ, Ren DQ, Zhang RB. · 2007
Rats were exposed to EMP using a GTEM cell at 0.5 pulses per second for 200 pulses with specific absorption rates of 50 mW/kg at 200 kV/m or 75 mW/kg at 400 kV/m. Heart rates in both sham- and EMP-exposed rats were not significantly changed. Systolic blood pressure increased immediately after exposure and decreased at 1 day and 3 days. Diastolic blood pressure increased immediately and decreased at 12 hours, 1 day, and 1 month. Mean arterial pressure increased immediately and decreased at 1 day.
Dimbylow P. · 2007
Researchers used finite-difference time-domain calculations to estimate SAR from 20 MHz to 3 GHz in hybrid voxel-mathematical models of the pregnant female. Mathematical models of the developing foetus at 8-, 13-, 26- and 38-week gestation were converted into voxels and combined with the reference adult female model, NAOMI at a resolution of 2 mm. The study calculated the electric field values needed to produce the ICNIRP public exposure restriction of 2 W kg(-1) when averaged over 10 g of the foetus.
Crouzier D et al. · 2007
Researchers exposed freely moving rats for 24 hours to a 1.8 GHz GSM radiofrequency signal at low power density. The study tracked acetylcholine release in the hippocampus, EEG, EMG, and subcutaneous temperature, and also analyzed brain lipid extracts using NMR after the animals were sacrificed. No significant changes in any measured parameter were observed under radiofrequency exposure, and the NMR study also failed to show any effect.
Bachmann M et al. · 2007
Researchers studied how the human brain's bioelectrical activity adapted to low-level microwave exposure in a group of 14 healthy volunteers. The volunteers were exposed to 450 MHz microwave radiation modulated at 40 Hz frequencies, with a field power density at the scalp of 0.16 mW/cm(2). Results showed that an initial increase in EEG power was compensated and even overcompensated, with adaptation effects apparent in alpha and beta rhythms.
Baohong W et al. · 2007
Researchers exposed human lymphocytes to 1.8 GHz microwaves at a SAR of 3 W/kg, ultraviolet ray C (UVC), or both, then measured DNA damage using the comet assay. Microwave exposure alone did not produce significantly more DNA damage than the control group. When combined with UVC, microwave exposure was associated with reduced DNA damage at 1.5-hour incubation but increased DNA damage at 4-hour incubation, compared with UVC alone.
Todorović D, Kalauzi A, Prolić Z, Jović M, Mutavdzić D. · 2007
Researchers measured the influence of a static magnetic field at 2 mT on neuronal population activity in eight individuals of the endangered insect species Morimus funereus. Five minutes of exposure produced excitatory effects in 5 of 8 individuals and inhibitory effects in 3 of 8 individuals in the antennal lobe. When reversibility was analyzed, the induced effects were prevailingly irreversible: 7 of 8 for the neuronal population and 6 of 8 for the nearest neuron.
Shen JF, Chao YL, Du L. · 2007
Researchers used whole-cell patch-clamp experiments on acute dissociated rat trigeminal root ganglion neurons to study how static magnetic fields affect voltage-gated potassium channel currents. The study evaluated the effects of moderate-intensity static magnetic fields on two types of voltage-gated potassium channel currents, called IK,A and IK,V. A 125 mT static magnetic field altered the inactivation rate and velocity of both channel currents, while activation properties showed no significant change.
Del Giudice E et al. · 2007
Researchers tested whether low-frequency electromagnetic field exposure could affect amyloid-related processes in cultured cells. The study exposed H4 neuroglioma cells, which overexpress human mutant amyloid precursor protein, to a 3.1 mT 50 Hz electromagnetic field. Overnight exposure led to a significant increase in amyloid-beta peptide secretion, including the isoform Abeta 1-42, without affecting cell survival.
Zeni et al. · 2007
Researchers investigated whether 900 MHz RF radiation could induce reactive oxygen species in murine L929 fibrosarcoma cells, with or without co-exposure to MX, a potent environmental carcinogen produced during chlorination of drinking water. Both continuous-wave and GSM mobile phone signals were applied for 10 or 30 min at specific absorption rates of 0.3 and 1 W/kg. The study found no indication that RF-field exposure, alone or combined with MX, induced reactive oxygen species formation, while MX alone caused a statistically significant increase in reactive oxygen species for all the treatment durations investigated.
Tkalec M, Malarić K, Pevalek-Kozlina B. · 2007
Researchers exposed duckweed (Lemna minor) to radiofrequency electromagnetic fields at 400 and 900 MHz, at field strengths of 10, 23, 41, and 120 V m−1, for 2 hours, and also tested a longer 4-hour exposure and modulated fields. After exposure, the researchers measured lipid peroxidation, H2O2 content, antioxidative enzyme activities and isoenzyme patterns, and HSP70 expression. At 900 MHz, almost all exposure treatments significantly increased lipid peroxidation and H2O2 content, mostly decreased PPX activity, and did not affect CAT activity. No differences in isoenzyme patterns of antioxidative enzymes or HSP70 level were found between control and exposed plants at either frequency.
Balci M, Devrim E, Durak I · 2007
Researchers assigned forty female albino Wistar rats to one of four groups to study the effects of mobile phone radiation on oxidant/antioxidant balance in corneal and lens tissues. One group received mobile phone radiation for 4 weeks, a second group received radiation plus a daily oral dose of vitamin C (250 mg/kg), a third group received vitamin C alone, and a fourth group served as a control. In corneal tissue, MDA level and CAT activity significantly increased and SOD activity was significantly decreased in the mobile phone group compared with the control group. In lens tissue, only the MDA level significantly increased in the mobile phone group relative to the control group, while SOD, GSH-Px, and CAT did not differ significantly between groups.