Research on environmental EMF sources - cell towers, 5G small cells, power lines, and smart meters.
## Outdoor / Infrastructure EMF Sources When you step outside your home, you enter an environment where electromagnetic fields come from sources beyond your direct control. Cell towers broadcasting 24/7, power lines carrying electricity to neighborhoods, smart meters collecting usage data, and increasingly, 5G small cells mounted on streetlights and utility poles. These infrastructure sources share a common characteristic: they're part of the built environment around us, installed and operated by utilities and telecommunications companies to serve entire communities.
Unknown authors · 2010
The construct was transfected into INER-37 and RMA E7 cell lines, which were then exposed to magnetic fields or thermal shock. In INER-37 cells, both magnetic field and thermal shock exposure increased luciferase activity compared to controls, while magnetic fields had no effect on RMA E7 cells.
Hirata A et al. · 2010
Researchers exposed rabbits to 2.45-GHz microwaves across a range of power densities to study the threshold for behavioral signs of thermal stress. The study found that a core temperature elevation of 1 degrees C was an estimate of the threshold for inducing behavioral signs of microwave-induced thermal stress in rabbits. The whole-body average SAR needed to produce behavioral signs was estimated at approximately 1.3 W/kg.
Unknown authors · 2010
Sun H, Che Y, Liu X, Zhou D, Miao Y, Ma Y. · 2010
Researchers investigated memory impairment in newly hatched chicks following in ovo exposure to a 50-Hz magnetic field of 2 mT for 60 minutes per day on embryonic days 12 through 18. Memory retention was tested at 10, 30, and 120 minutes after exposure to a bitter-tasting bead.
Kumar S, Jain S, Behari J, Avelev VD, Mathur R. · 2010
Researchers exposed rats with spinal cord injuries to extremely low frequency magnetic fields (50 Hz, 17.9 microT) for 2 hours daily over 8 weeks. The magnetic field exposure restored normal food intake, water consumption, and body weight in the paralyzed rats, all of which had decreased after their spinal cord injuries. This suggests that specific magnetic field frequencies might help support basic physiological functions in spinal cord injury patients.
Shckorbatov YG et al. · 2010
Researchers exposed human fibroblasts to 36.65 GHz microwave radiation at power densities of 1, 10, 30, and 100 µW/cm(2) for 10 seconds, using linear, left-handed, and right-handed elliptically polarized waves. Heterochromatin granule quantity was assessed at 600× magnification after staining with orcein solution. Irradiation at 1 µW/cm(2) produced no effect, while 10 and 100 µW/cm(2) increased heterochromatin granule quantity, with more intense irradiation causing more chromatin condensation. Right-handed elliptically polarized radiation showed greater biological activity than left-handed polarized radiation.
Unknown authors · 2010
The pEMF plasmid was electrotransferred into the quadriceps muscles of BALB/c mice. Mice exposed to the EMFs for 2 hours daily over 7 days showed increased luciferase expression compared with controls (P<0.05).
Hardell L, Söderqvist F, Carlberg M, Zetterberg H, Mild KH · 2010
Researchers studied the concentration of β-trace protein in blood in relation to emissions from wireless phones in 62 persons aged 18-30 years. The concentration of β-trace protein decreased with increasing number of years of use of a wireless phone, yielding a negative β coefficient of -0.32 with a 95% confidence interval of -0.60 to -0.04. Cumulative use in hours also gave a negative β coefficient, although not statistically significant. Forty of the 62 persons participated in an experimental study with 30 min exposure to an 890-MHz GSM signal, and no statistically significant change of β-trace protein was found. In a similar study of the remaining 22 participants with no exposure, β-trace protein increased significantly over time, probably due to a relaxed situation.
Hardell L, Söderqvist F, Carlberg M, Zetterberg H, Mild KH. · 2010
Researchers measured beta-trace protein, a key enzyme that produces the brain's natural sleep hormone, in 62 young adults who used wireless phones. They found that people who had used wireless phones longer had lower levels of this sleep-promoting protein in their blood. This provides a potential biological explanation for why some people experience sleep problems when exposed to cell phone radiation.
Unknown authors · 2010
Researchers exposed male Wistar rats from postnatal day 23 to 53 to 50 Hz magnetic fields at 100-300 μT for 4 hours daily, atrazine at 20 or 200 mg/kg body weight, or both combined. Light and electron microscopy showed no significant alterations in thyroid structure in any treated group compared to controls. The magnetic field group showed significant differences in thyroid follicle volume density and connective tissue compared to atrazine and combined groups. High-dose atrazine significantly affected mast cell numbers compared to controls.
Unknown authors · 2010
Early studies tended toward a consistent association between risks for leukemia and brain cancer and residential proximity to power lines having high wire configuration. More recent studies using improved exposure measurement methods have produced inconsistent results, with some suggesting increased risk and others not. Occupational exposures suggested increased risk for leukemia and to a lesser extent brain cancer and Non-Hodgkin lymphoma. Studies of residential exposures and cancer in adults generally suggested no effect. Laboratory work has been unable to demonstrate a biological mechanism that might explain the epidemiological findings.
Unknown authors · 2010
Researchers exposed young male rats to 50 Hz magnetic fields (the same frequency as power lines) and the pesticide atrazine, both separately and together, for 30 days to see if they would damage thyroid function. They found no synergistic effects between the two exposures, though magnetic fields alone caused some structural changes in thyroid tissue that warrant further study.
Gurbuz N, Sirav B, Yuvaci HU, Turhan N, Coskun ZK, Seyhan N. · 2010
Researchers exposed female Wistar rats to 1800 MHz GSM-modulated RFR for 20 minutes per day, 5 days a week, for one month. They measured micronucleus frequency in exfoliated bladder cells to assess genotoxic damage. No significant difference in micronucleus frequency was found between exposed and control groups (p>0.05). The authors concluded that 1800 MHz RFR did not produce any genotoxic effect under these exposure conditions.
Unknown authors · 2010
Researchers used computer modeling to measure how much radiation workers absorb when standing near multi-band cell tower antennas operating at 900, 1800, and 2100 MHz frequencies. They found that higher frequencies create more localized radiation absorption, while distance from the antenna determines which safety limits matter most. The study shows that combining multiple frequencies increases total radiation exposure in predictable ways.
Unknown authors · 2010
One hundred and twenty Swiss albino mice were equally divided into 6 groups. The study groups were exposed to 1, 2, 3, 4 and 5 microT 50 Hz-EMFs for 40 days. ELF-EMF exposure caused a nonlinear decline of nucleus area, a sharp drop in AgNOR area at 1 microT that then rose to an insignificantly higher level than controls, and no change in mean AgNOR numbers per nucleus. Relative AgNOR area was highest in the 1 microT group and similar in the 5 microT group, while the remaining groups had significantly lower values similar to controls. The field exposure at any intensity did not significantly affect the frequency of either MPBLs or MPCEs, but the number of MN per PBL in the 4 and 5 microT-exposure groups were significantly higher than those of the lower intensity exposure groups.
Kawai H, Nagaoka T, Watanabe S, Saito K, Takahashi M, Ito K. · 2010
Researchers used computational models of pregnant women at 4 and 8 weeks of pregnancy to calculate the specific absorption rate (SAR) in embryos exposed to electromagnetic plane waves from 10 MHz to 1.5 GHz. The models had a 2 mm spatial resolution and represented a woman similar in height and weight to an average-sized Japanese adult female, with either a cubic 4-week or spheroidal 8-week embryo. The maximum average SAR in the embryos was lower than 0.08 W kg(-1) when the incident power density was at the ICNIRP reference level for the general public.
Unknown authors · 2010
The present study investigated the potential effects of extremely low frequency (ELF) electric field exposure on plasma cholesterol and triglyceride levels of adult male rats. Sixty rats were randomly divided into three groups: controls without exposure, a group exposed to 50 Hz for 10 days, and a group exposed to 50 Hz for 30 days. Total cholesterol concentration in the short-term exposure group was 65.33 ± 15.31 mg/dL and in the long-term exposure group was 59.55 ± 15.01 mg/dL, both significantly lower than the control value of 70.44 ± 19.60 mg/dL. Plasma triglyceride levels were 67.33 ± 15.63 mg/dL in one exposed group and 51.53 ± 14.17 mg/dL in the other, compared with 84.44 ± 16.79 mg/dL in controls.
Unknown authors · 2010
Researchers exposed rats to 50 Hz electric fields (the same frequency as power lines) for either 10 or 30 days and measured cholesterol and triglyceride levels in their blood. Both exposure groups showed significantly lower cholesterol and triglyceride levels compared to unexposed controls, with longer exposure producing greater decreases. This suggests that power line frequency electric fields can alter fat metabolism in mammals.
Grigor'ev IuG et al. · 2010
Unknown authors · 2010
Rats were exposed to 100 and 500 μT ELF-MF for 2 h/day during 10 months. Calcium levels decreased in the ELF-500 exposure group compared to the sham group. Magnesium levels decreased in the ELF-500 exposure group compared to both the sham and ELF-100 exposure groups. Zinc levels were lower in the ELF-500 exposure group than in the sham and ELF-100 exposure groups. No significant differences were found in phosphorus, copper, or iron levels between groups.
Salama N, Kishimoto T, Kanayama HO, Kagawa S · 2010
Researchers randomly assigned 18 male rabbits to a phone group exposed to an 800 MHz mobile phone in standby for 8 hours daily over 12 weeks and a control group. Copulatory behavior was recorded with six female teasers, and serum testosterone, dopamine, and cortisol were measured. The phone group showed significantly more mounts without ejaculation, significantly fewer mounts with ejaculation, increased biting or grasping, longer mounting latency, and no significant hormone differences.
Unknown authors · 2010
Researchers exposed Fasciola hepatica eggs to a 50 Hz, 2 mT extremely low frequency magnetic field for 10 days. The exposed eggs hatched faster than non-exposed control eggs. Snails infected with miracidia from exposed eggs laid significantly fewer cocoons by day 14 and showed significantly higher mortality by day 42 compared to control snails.
Unknown authors · 2010
The study used RAW 264.7 cells and RBL 2H3 cells. The cells were exposed to 60 Hz EMF at 0.1 or 1 mT for 4 or 16 hours. Basal and melittin-induced arachidonic acid release, cPLA2, sPLA2, PLC, and PLD activities were unchanged by EMF exposure. The authors concluded that the exposure conditions, which were 2.4 fold higher than the occupational limit, did not induce phospholipase-associated signaling pathways.
Ciejka E, Skibska B, Kleniewska P, Goraca A. · 2010
Researchers studied the influence of a low-frequency magnetic field on oxidative stress markers in rat muscles. Thirty male rats weighing 280 to 300 grams were randomly divided into three experimental groups, each containing seven animals. One treatment group was exposed to 40 Hz and 7 mT for 0.5 hours per day for 14 days, and the other was exposed at the same settings for 1 hour per day for 14 days. Exposure caused a significant increase in sulfhydryl group concentration and a decrease in protein concentration in the muscle homogenates.
Unknown authors · 2010