Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 1,982 studies with bioeffects seen from BioInitiative Report
Baohong W et al. · 2007
Chinese researchers exposed human immune cells to 1.8 GHz microwave radiation and UV light. Microwaves alone caused no DNA damage, but when combined with UV, they disrupted normal DNA repair - initially reducing damage then increasing it hours later, suggesting unpredictable interference with cellular repair mechanisms.
Todorović D, Kalauzi A, Prolić Z, Jović M, Mutavdzić D. · 2007
Researchers exposed endangered longhorn beetles to weak magnetic fields (2 milliTesla) for five minutes and monitored their brain nerve activity. The magnetic field caused permanent changes to nerve cell activity in 7 out of 8 beetles tested, with some neurons becoming more active and others less active. This demonstrates that even brief exposure to relatively weak magnetic fields can cause lasting changes to nervous system function in living organisms.
Shen JF, Chao YL, Du L. · 2007
Researchers exposed rat nerve cells from the trigeminal ganglion (which controls facial sensation) to static magnetic fields at 125 millitesla and measured how this affected potassium channels that help control nerve cell activity. They found that the magnetic field altered how these channels turned off (inactivated), potentially disrupting normal nerve function. This suggests that moderate-strength magnetic fields can physically deform cell membranes and change how critical ion channels operate.
Del Giudice E et al. · 2007
Italian researchers exposed human brain cells to 50 Hz electromagnetic fields from power lines and found significantly increased production of beta-amyloid proteins, the toxic clumps linked to Alzheimer's disease. This laboratory finding suggests a potential biological mechanism connecting household electricity exposure to Alzheimer's risk.
Zeni et al. · 2007
Researchers exposed mouse cells to 900 MHz cell phone radiation for up to 30 minutes to test whether it creates harmful molecules called reactive oxygen species. The radiation did not increase these damaging molecules at any exposure level tested, suggesting no immediate cellular harm.
Tkalec M, Malarić K, Pevalek-Kozlina B. · 2007
Researchers exposed duckweed plants to cell phone-like radiofrequency radiation at 400 and 900 MHz frequencies. The exposure caused oxidative stress, where harmful molecules damage plant cells by overwhelming natural defenses. Higher frequency radiation generally produced more severe cellular damage than lower frequencies.
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.
Sirmatel O, Sert C, Tümer C, Oztürk A, Bilgin M, Ziylan Z · 2007
Researchers measured nitric oxide production in 33 healthy young male volunteers aged 18 to 26 years old immediately after a 30-minute exposure to a 1.5 T magnetic field. A control group of 30 healthy male volunteers aged 19 to 26 years old was not exposed to the magnetic field, and their nitric oxide levels were also measured. Total nitrite concentration in post-exposure samples was found to be higher than in pre-exposure samples (P < .05).
Sirmatel O, Sert C, Sirmatel F, Selek S, Yokus B · 2007
Researchers investigated the effects of a 1.5 T static magnetic field, produced by an MRI apparatus, on oxidative stress markers in 33 male volunteers. Total antioxidant capacity showed a significant increase after exposure compared to before exposure (p < 0.05). Oxidative stress index and total oxidant status showed a significant decrease after exposure compared to before exposure (p < 0.01 for each). The researchers concluded that the 1.5 T static magnetic field produced a positive effect of decreasing oxidative stress in men following short-term exposure.
Sahebjamei H, Abdolmaleki P, Ghanati F · 2007
Researchers investigated the effects of static magnetic fields on antioxidant enzyme activities in suspension-cultured tobacco cells. Cells were exposed to static magnetic fields at 10 and 30 mT for 5 days, 5 hours each day, and compared with control cells. Superoxide dismutase activity increased with exposure, while catalase and ascorbate peroxidase activity decreased, and lipid peroxidation levels also increased.
Cheun BS, Yi SH, Baik KY, Lim JK, Yoo JS, Shin HW, Soh KS · 2007
Researchers studied biophoton emission from Madin-Darby canine kidney (MDCK) cells treated with hydrogen peroxide, with and without exposure to a 60 Hz AC magnetic field. Hydrogen peroxide increased biophoton emission from the cells, and the increase was dependent on the amount of hydrogen peroxide applied. When the 60 Hz AC magnetic field was applied, the decay of chemiluminescence intensity took a different path compared to cells not exposed to the field.
Akdag MZ, Bilgin MH, Dasdag S, Tumer C · 2007
Stevens P · 2007
Researchers studied whether exposure to a 0–5 µT magnetic field at EEG alpha-band frequencies (8–12 Hz) would affect emotional state. Participants reported a change in emotional state following exposure, and a decrease in global field power was observed. The frontal alpha-asymmetry that would physiologically indicate a directly induced emotional state was absent, and researchers suggested that participant experiences were due to an interpretation of the effects of MF exposure.
Shin EJ et al. · 2007
Researchers examined the role of dopaminergic receptors in behavioral changes induced by extremely low frequency magnetic fields (ELF-MF). Exposure to ELF-MF at 2.4 mT for 1 hour per day, for one or seven days, enhanced locomotor activity in a time-dependent manner. The results suggest that ELF-MF-induced behavioral responses are, at least in part, mediated by activation of dopamine D1-like receptors.
Manikonda PK et al. · 2007
Researchers exposed rats to 50 Hz magnetic fields at 50 and 100 μT intensities for 90 days and then examined hippocampal tissue. Compared to controls, ELF exposure was associated with increased intracellular calcium levels and changes in the activity of several calcium-related enzymes. Binding to NMDA receptors was also found to be decreased in exposed rats. The researchers suggested that perturbed neuronal functions caused by ELF exposure may involve altered calcium signaling contributing to aberrant NMDA receptor activities.
Jadidi M et al. · 2007
Researchers used a water maze to evaluate how magnetic field exposure affects consolidation and retrieval of spatial memory in rats. Exposure to a 50 Hz, 8 mT magnetic field for 20 minutes immediately after training impaired retention performance, but exposure at 2 mT did not. Exposure given shortly before retention testing had no effect on performance.
Ishay JS et al. · 2007
Researchers kept Oriental hornet workers in an Artificial Breeding Box and exposed them to an AC magnetic field of a magnitude of B = 50-70 mGauss, comparing the combs they built with those from a control group exposed only to the natural terrestrial magnetic field. Exposed hornets built combs with a 35-55% smaller number of cells and fewer eggs, many deformed and imperfectly hexagonal cells, and more delicate and slender comb stems.
Del Giudice E et al. · 2007
Researchers tested whether low-frequency electromagnetic field exposure could affect amyloidogenic processes in cultured cells. They exposed H4 neuroglioma cells that stably overexpress human mutant amyloid precursor protein to a 3.1 mT 50 Hz field. Overnight exposure significantly increased secretion of amyloid-beta peptide, including the isoform Aβ 1–42, without affecting cell survival.
Che Y, Sun H, Cui Y, Zhou D, Ma Y. · 2007
Researchers examined the effects of a 50 Hz magnetic field at 1 mT intensity on learning and memory in Lohmann brown domestic chicks using a detour learning task. Chicks exposed for 20 hours per day showed a significant impairment in detour learning, while those exposed for 50 minutes per day showed no effect.
Carrubba S, Frilot C, Chesson AL, Marino AA. · 2007
Regel SJ et al. · 2007
Researchers exposed the heads of 15 healthy male subjects for 30 min prior to sleep to a pulse-modulated EMF signal at different intensities or a sham condition, in a double-blind, crossover design. The active exposure levels used peak spatial specific absorption rates of 0.2 W kg–1 and 5 W kg–1. Sleep EEG analysis showed a dose-dependent increase of power in the spindle frequency range in non-REM sleep, while sleep architecture was not affected. Reaction speed slowed with increasing field intensity in the 1-back task, but accuracy in the CRT and N-back tasks was not affected in a dose-dependent manner.
Ning W, Xu SJ, Chiang H, Xu ZP, Zhou SY, Yang W, Luo JH · 2007
Researchers cultured hippocampal neurons from rats and exposed them to GSM 1800 MHz microwaves at either 2.4 or 0.8 W/kg for 15 minutes each day from DIV6 to DIV14. At 2.4 W/kg, the density and mobility of dendritic filopodia at DIV8 and the density of mature spines at DIV14 were significantly decreased, and the average length of dendrites per neuron at DIV10 and DIV14 was also decreased. Dendritic arborization was unaltered in the exposed neurons, and no significant changes were found in neurons exposed to 0.8 W/kg.
Meral I et al. · 2007
In brain tissue, the MDA level increased and GSH level and CAT enzyme activity decreased in EMF-exposed guinea pigs, while vitamins A, E, and D3 levels did not change. In blood, MDA, vitamins A, D3, and E levels, and CAT enzyme activity increased, while GSH level decreased in the EMF-exposed guinea pigs.
Kumlin T et al. · 2007
Researchers exposed young male Wistar rats to a 900 MHz mobile phone signal for 2 h/day on 5 days/week. After 5 weeks of exposure at whole-body average specific energy absorption rates of 0.3 or 3.0 W/kg or sham exposure, rats were assessed for behavioral and morphological changes. No degenerative changes, dying neurons, or effects on blood-brain barrier leakage were detected, and no group differences appeared in the open-field, plus maze, or acoustic startle response tests. In the water maze test, significantly improved learning and memory were detected in rats exposed to RF fields.
Hung CS, Anderson C, Horne JA, McEvoy P · 2007
Researchers exposed 10 healthy young adults to talk, listen, standby, or sham signal modes for 30 minutes, then gave them a 90-minute sleep opportunity. Sleep latency after talk mode was markedly and significantly delayed beyond listen and sham modes. This condition effect was also evident in 1–4 Hz EEG frontal power, a frequency range described as particularly sensitive to sleep onset. There was no condition effect for subjective sleepiness.