Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 1,332 studies with bioeffects seen from SafeRemr Research Collection
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.
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.
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.
Brillaud E, Piotrowski A, de Seze R · 2007
Researchers measured GFAP expression in rat brains 2, 3, 6, and 10 days after a single 15-minute 900 MHz GSM exposure at a brain averaged SAR of 6 W/kg. A statistically significant increase in GFAP stained surface area was observed 2 days after exposure in the frontal cortex and the caudate putamen. A smaller statistically significant increase was noted 3 days after exposure in those same areas and in the cerebellum cortex. The researchers concluded this was a temporary effect, probably due to a hypertrophy of glial cells, and noted that whether the effect could be harmful remains to be studied.
Zhao R, Zhang S, Xu Z, Ju L, Lu D, Yao G. · 2007
Researchers investigated whether 1800 MHz radiofrequency electromagnetic fields could influence gene expression in rat neurons. Among 1200 candidate genes, 24 were up-regulated and 10 were down-regulated after 24 hours of intermittent exposure at a SAR of 2 W/kg. The researchers concluded that gene expression in rat neurons could be altered by exposure to radiofrequency electromagnetic fields under their experimental conditions.
Buttiglione M et al. · 2007
Researchers exposed human neuroblastoma SH-SY5Y cells to 900 MHz radiofrequency radiation at 1 W/kg to study effects on gene expression and cell-cycle control. Short-term exposures produced a transient increase in Egr-1 mRNA levels along with activation of the MAPK subtypes ERK1/2 and SAPK/JNK. Exposure had an anti-proliferative effect, and a significant G2-M cell-cycle arrest was observed, with signs of apoptosis appearing after 24 hours. A significant decrease in mRNA levels of Bcl-2 and survivin genes, both linked to signaling between G2-M arrest and apoptosis, was also observed.
Unknown authors · 2006
Researchers exposed dairy cows to power line frequency electric and magnetic fields (10 kV/m, 30 microTesla at 60 Hz) for 16 hours daily over multiple 28-day periods. The study found moderate changes in blood thyroxine (thyroid hormone) levels, with timing of exposure and reproductive status affecting the results.
Unknown authors · 2006
Researchers exposed male and female rats to extremely strong 14-Tesla static magnetic fields (280,000 times stronger than Earth's magnetic field) and found significant sex differences in behavioral responses. Female rats showed more severe effects, including increased circling behavior and stronger, more persistent taste aversion that was influenced by their hormonal cycles. The study reveals that biological sex and hormones significantly affect how organisms respond to high-strength magnetic field exposure.
Unknown authors · 2006
Italian researchers exposed mice to 50 Hz magnetic fields (the same frequency as power lines) at 650 microtesla for 21 days and found significant DNA damage in newborns but not adults. The study used a specialized test that can distinguish between broken chromosome fragments and whole chromosomes that failed to divide properly during cell division.
Paul AL, Ferl RJ, Meisel MW · 2006
Scientists exposed transgenic plants to extremely high magnetic fields (up to 30 Tesla) and found that field strengths above 15 Tesla triggered significant stress responses and altered the expression of 114 genes. This research demonstrates that magnetic fields far stronger than those in everyday devices can cause widespread biological changes at the cellular level.
Unknown authors · 2006
Researchers exposed human immune cells called monocytes to extremely low frequency magnetic fields (1.0 mT strength) and found significant cellular activation and gene expression changes. The study detected altered activity in 986 genes and identified specific immune pathway activation that could affect how our bodies respond to infections and inflammation.
Unknown authors · 2006
Researchers exposed mouse embryos to 50 Hz electromagnetic fields (the same frequency as power lines) and found it caused DNA double-strand breaks, which are serious forms of genetic damage. The EMF exposure also reduced the embryos' ability to develop normally. While the embryos could partially repair this damage, the study shows that power line frequency radiation can harm developing life at its most vulnerable stage.
Unknown authors · 2006
Researchers exposed rat brain neurons to brief static magnetic fields and discovered they triggered a specific gene (Ntan1) that breaks down important brain proteins. The magnetic exposure caused a three-fold increase in this protein-degrading gene and led to breakdown of MAP2, a crucial protein for brain cell structure.
Unknown authors · 2006
Greek researchers exposed human immune cells (lymphocytes) to 50 Hz pulsed electric fields and found significant DNA damage compared to unexposed cells. The damage was detected using the comet assay, a sensitive test for DNA breaks. While some repair occurred after 2 hours, the findings show that power-line frequency electric fields can directly damage human genetic material.
Unknown authors · 2006
Researchers exposed male rats to static magnetic fields (128 mT) for one hour daily over 30 days to study effects on reproductive health. While sperm count remained normal, the magnetic field exposure significantly reduced testosterone levels in both blood and testicles, and caused DNA damage through oxidative stress. This suggests static magnetic fields may disrupt hormone production even when fertility appears unaffected.
Unknown authors · 2006
This 1977 study examined how pesticides damage DNA in human cells and trigger cellular repair mechanisms. Researchers found that 10 of 13 tested pesticides caused DNA damage (measured as unscheduled DNA synthesis) in cultured human cells, either directly or after metabolic processing. The DNA repair patterns varied by compound, resembling either X-ray damage (short repair patches) or UV damage (longer repair patches).
Unknown authors · 2006
Vian A et al. · 2006
Researchers exposed tomato plants to 900 MHz microwave radiation (similar to cell phone frequencies) for just 5-15 minutes and found it triggered a strong stress response at the genetic level. The plants produced 3.5 times more stress-related proteins, showing their cells recognized the radiation as harmful. This demonstrates that even brief, low-level microwave exposure can cause biological effects in living organisms.
Krause CM et al. · 2006
Finnish researchers studied how mobile phone radiation affects brain activity in 15 children (ages 10-14) while they performed memory tasks. When exposed to 902 MHz radiation from an active phone, the children showed measurable changes in their brain wave patterns during both memory encoding and recognition phases. This demonstrates that cell phone radiation can directly alter brain function in developing minds, even during short-term exposure.
Hamann W, Abou-Sherif S, Thompson S, Hall S. · 2006
Researchers applied pulsed radiofrequency energy to nerve areas in rats and found it triggered a stress response in small pain-sensing neurons, even at temperatures below what would cause obvious tissue damage. The treatment specifically affected the types of nerve cells that carry pain signals (C and A-delta fibers), suggesting radiofrequency can alter nerve function through non-thermal mechanisms. This challenges the assumption that RF energy is only harmful when it heats tissue enough to cause visible damage.
Ferreira AR et al. · 2006
Researchers exposed pregnant rats to cell phone radiation during pregnancy and found their offspring had significantly more DNA damage in their blood cells compared to unexposed offspring. The DNA damage appeared as micronuclei (small fragments of broken chromosomes) in red blood cells, indicating the radiation affected developing blood-forming tissues. This suggests cell phone radiation during pregnancy may cause genetic damage in developing offspring, even though the study found no changes in oxidative stress markers.