EMF Research Studies

The secret inside your cellphone (CBC Marketplace)

Unknown authors · 2017

The ameliorative effect of gallic acid on pancreas lesions induced by 2

https://www.tandfonline.com/doi/full/10.1080/13102818.2017.1373033 -- Topsakal S et al. · 2017

Sixteen Wistar albino rats were divided into sham and exposure groups, with the exposure group receiving 2.4 GHz RFR from a Wi-Fi generator 24 hours per day for one year at a distance of 50 cm. Distortion product otoacoustic emissions (DPOAE) were measured at baseline, 6 months, and 12 months. At 6000 Hz, DPOAE values were lower in the exposure group than in the sham group, and at 12 months they were also lower than baseline and 6-month values; at 2000 Hz, DPOAE values at 6 and 12 months were higher than baseline.

Does all-day and long-term exposure to radiofrequency radiation emitted from Wi-Fi affect hearing? Biotechnology and Biotechnological Equipment

Open access paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5585657/ -- Yorgancilar E et al. · 2017

Sixteen Wistar albino rats were divided into sham and exposure groups. The exposure group received 2.4 GHz RFR from a Wi-Fi generator for 24 h/day for one year at a distance of 50 cm. Distortion product otoacoustic emissions were measured at baseline, at 6 months, and at 12 months. At 6000 Hz, DPOAE values in the exposure group were lower than in the sham group and also lower at 12 months than at baseline and 6 months, while at 2000 Hz DPOAE values at 6 and 12 months were higher than baseline.

Thermal mapping on male genital and skin tissues of laptop thermal sources and electromagnetic interaction

Conclusion The study was an attempt to draw attention towards the adverse effects of non-ionizing electromagnetic radiations (NI-EMR) in the frequency that is used widely in the field of telecommunication et al. · 2017

The study used computer simulations to investigate laptop thermal effects from electromagnetic fields and thermal sources simultaneously. Simulations provided steady-state temperature, SAR distribution, and heat flux beneath the laptop. The laptop in high performance mode generated a peak heat flux of 420 W/m², and combined with 1 W antenna radiation increased lap skin, scrotum, and testis temperatures by 5.6, 2.1, and 1.4 °C respectively. The antenna radiation alone produced peak SAR values of 0.37×10⁻³ W/kg at 2.4 GHz and 0.13×10⁻¹ W/kg at 5 GHz, considered negligible relative to safety standards.

Neuroprotective Effect of Low Frequency-Pulsed Electromagnetic Fields in Ischemic Stroke

Urnukhsaikhan E, Mishig-Ochir T, Kim S-C, Park J-K, Seo Y-K · 2017

Researchers exposed C57B6 mice to LF-PEMF at 60 Hz and 10 mT after inducing ischemic stroke via photothrombotic occlusion. They measured the BDNF/TrkB/Akt signaling pathway, pro-apoptotic and pro-survival protein and gene expressions, inflammatory mediators, and performed behavioral tests. LF-PEMF treatment promoted activation of the BDNF/TrkB/Akt signaling pathway. Pro-survival proteins increased significantly, while pro-apoptotic proteins and inflammatory mediators decreased. The results demonstrated a neuroprotective effect of LF-PEMF exposure after ischemic stroke in mice during recovery.

Combined effect of pulsed electromagnetic field and sound wave on In vitro and In vivo neural differentiation of human mesenchymal stem cells

Choi Y-K et al. · 2017

Researchers investigated the synergistic effect of pulsed electromagnetic fields and sound waves on neural differentiation of human bone marrow mesenchymal stem cells in vitro and in vivo. Combined exposure accelerated neural-related genes more than individual exposure to either stimulus. The combined wave up-regulated neural and synaptic proteins in 3-D culture through ERK phosphorylation. In a mouse stroke model, combined wave exposure reduced infarction volume and improved behavioral activity.

Effects of Simulated Mobile Phone Electromagnetic Radiation on Fertilization and Embryo Development

Chen, H, Qu Z, Liu W · 2017

The Subseasonal to Seasonal Prediction project was established by the World Weather Research Programme and World Climate Research Programme. Its main deliverable is an extensive database of subseasonal forecasts up to 60 days and reforecasts from 11 operational centers. The database has been available to researchers since May 2015. A preliminary study using the database suggests that S2S models significantly underestimate MJO teleconnection amplitude over the Euro-Atlantic sector. The database also helped show higher probability of landfall for Tropical Cyclone Pam 2–3 weeks in advance.

Su L, Wei X, Xu Z, Chen G

Unknown authors · 2017

Resolving the enigma of effect of mobile phone usage on spermatogenetsis in humans in south Indian population

Asian J Pharmaceut Clin Res · 2017

The effects of microwave radiation on rabbit's retina

Talebnejad MR et al. · 2017

Researchers exposed 40 adult white New Zealand rabbits to GSM-simulated microwave radiation at distances of 10 cm or 30 cm for one or three days. Electroretinography responses measured seven days after exposure showed no statistically significant differences between any groups. Retinal tissue appeared normal without degeneration, but ciliary body congestion occurred more often in rabbits receiving higher microwave doses.

No adverse effects detected for simultaneous whole-body exposure to multiple-frequency radiofrequency electromagnetic fields for rats in the intrauterine and pre- and post-weaning periods.

Shirai T et al. · 2017

Researchers exposed pregnant rats and their offspring to eight radiofrequency signals ranging from 800 MHz to 5.2 GHz. The exposure lasted 20 h per day from gestational day 7 through weaning and continued for offspring up to 6 weeks of age. No abnormal findings were observed in the dams, F1 offspring, or F2 offspring across all evaluated parameters. The study concluded that simultaneous whole-body exposure to these frequencies did not show adverse effects on pregnancy or development.

Symptoms and the use of wireless communication devices: A prospective cohort study in Swiss adolescents

Schoeni A, Roser K, Röösli M. · 2017

Researchers conducted a prospective cohort study of 439 Swiss adolescents aged 12-17 years who completed questionnaires about mobile and cordless phone use and symptoms at baseline and one year later. Operator-recorded mobile phone data were obtained for a subgroup of 234 adolescents, and RF-EMF dose measures for the brain and whole body were computed. Data were analyzed using mixed-logistic cross-sectional and cohort models adjusted for confounders. Symptoms such as tiredness were more strongly associated with text message frequency (OR 1.81 cross-sectional, OR 1.87 cohort) than with call duration or RF-EMF dose measures. The pattern of stronger associations with device use than with RF-EMF dose does not support a causal effect of RF-EMF exposure on symptoms.

Lasting hepatotoxic effects of prenatal mobile phone exposure.

Yilmaz A et al. · 2017

Pregnant rats were exposed to 900 MHz EMF for 24 hours a day over 20 days using a digital signal generator placed under the cage. Livers and blood were collected from male and female offspring 60 days after birth for biochemical and histopathological analysis. Liver malondialdehyde levels increased significantly while glutathione levels decreased significantly, and serum ALT and AST levels were significantly elevated. Liver sections showed intense hepatocyte degeneration with cytoplasmic eosinophilic structures, pyknotic nuclei, and fibrosis. The researchers concluded that intrauterine EMF exposure causes harmful liver effects that persist into adulthood.

Association of excessive mobile phone use during pregnancy with birth weight: an adjunct study in Kumamoto of Japan Environment and Children's Study.

Lu X, Oda M, Ohba T, Mitsubuchi H, Masuda S, Katoh T. · 2017

The study aimed to determine the associations of excessive mobile phone use with neonatal birth weight and infant health status. A sample of 461 mother and child pairs participated in a survey on maternal characteristics, infant characteristics, and maternal mobile phone usage information during pregnancy. The mean infant birth weight was lower in the excessive use group than in the ordinary use group, and the frequency of infant emergency transport was significantly higher in the excessive use group than in the ordinary use group.

Evaluation of the mobile phone electromagnetic radiation on serum iron parameters in rats.

Çetkin M, Demirel C, Kızılkan N, Aksoy N, Erbağcı H. · 2017

Researchers used 32 male Wistar albino rats divided into control, sham, mobile phone speech (2h/day) and standby (12h/day) groups. The speech and standby groups were exposed to the EMF for a total of 10 weeks. Serum iron and ferritin did not differ significantly between exposed and control groups. Unsaturated iron binding capacity and total iron binding capacity were significantly lower in exposed groups compared to controls.

Effect of long-term exposure of mice to 900 MHz GSM radiation on experimental cutaneous candidiasis.

Bayat M, Hemati S, Soleimani-Estyar R, Shahin-Jafari A. · 2017

Exposed mice showed 1.5-day and 3.7-day delays in wound healing at stage two. Exposed mice also had higher yeast loads in skin lesions at days 5, 7 and 9 and were more likely to die after systemic Candida challenge, with higher kidney yeast counts.

Biochemical and pathological changes in the male rat kidney and bladder following exposure to continuous 900-MHz electromagnetic field on postnatal days 22-59.

Türedi S, Kerimoğlu G, Mercantepe T, Odacı E. · 2017

Malondialdehyde levels increased in the EMF group compared to both control and sham groups in kidney and bladder tissues, while catalase and glutathione levels decreased. Kidney tissue in the EMF group showed dilatation and vacuolization in tubules, glomerular degeneration, and increased apoptotic cells. Bladder tissue in the EMF group showed degeneration in the transitional epithelium, stromal irregularity, and increased apoptotic cells. Transmission electron microscopy revealed glomerular capillary degeneration with capillary basement membranes in the EMF group.

Radiofrequency electromagnetic field exposure in everyday microenvironments in Europe: A systematic literature review.

Sagar S et al. · 2017

Personal radiofrequency electromagnetic field exposure measurements in Swiss adolescents.

Roser K et al. · 2017

Researchers measured personal RF-EMF exposure in 90 adolescents aged 13 to 17 years using a portable ExpoM-RF device across 13 frequency bands from 470 to 3600 MHz for three consecutive days with a time-activity diary. Mobile phones contributed 67.2% and mobile phone base stations contributed 19.8% of total personal RF-EMF measurements averaging 63.2 μW/m² (0.15 V/m). WLAN at school and home accounted for 3.5% of total personal measurements. Environmental sources contributed on average 6.0% to the brain dose and 9.0% to the whole-body dose according to dose calculations.

Measurements of Radiofrequency Radiation with a Body-Borne Exposimeter in Swedish Schools with Wi-Fi. Front.

Hedendahl LK, Carlberg M, Koppel T, Hardell L. · 2017

Eighteen teachers from seven schools carried a body-borne exposimeter in school to measure radiofrequency radiation exposure. The mean exposure to RF radiation ranged from 1.1 to 66.1 µW/m² across the schools. The highest mean level recorded was 396.6 µW/m² during 5 minutes of a lesson when the teacher let students stream and watch YouTube videos.

Waldmann-Selsam, A Balmori-de la Puente, H Breunig and A Balmori. 2016

Unknown authors · 2016

Researchers conducted a long-term field monitoring study from 2006 to 2015 in Bamberg and Hallstadt, Germany, to examine the connection between unusual tree damage and radiofrequency exposure. They measured radiofrequency electromagnetic fields at 144 locations and interpolated the points to compile an electromagnetic map of power flux density, and selected 60 damaged trees, 30 randomly selected trees, and 30 trees in low radiation areas for comparison. Measurements showed significant differences in power flux density between the damaged side facing a phone mast and the opposite side, and trees in low radiation areas showed no damage.

Vian, A, E Davies, M Gendraud and P Bonnet. 2016

Unknown authors · 2016

Monitoring and remediation of on-farm and off-farm ground current measured as step potential on a Wisconsin dairy farm: A case study

Unknown authors · 2016

This case study of a Wisconsin dairy farm documents how to establish permanent monitoring of ground current and how to determine and remediate both on-farm and off-farm sources. On-farm sources included lighting, variable speed frequency drives on motors, and a radio frequency identification system, while off-farm sources were due to a poor primary neutral return on the utility side. The study found that a step-potential threshold of 1 V RMS at 60 Hz is inadequate to protect dairy cows, as decreases of a few mV peak-peak at higher frequencies increased milk production, reduced milking time, and improved cow comfort.

Effects of Wi-Fi radiation on germination and growth of garden cress (Lepidium sativum), broccoli (Brassica oleracea), red clover (Trifolium pratense) and pea (Pisum sativum) seedlings: A partial replication study

Unknown authors · 2016

Effect of radiofrequency radiation from Wi-Fi devices on mercury release from amalgam restorations.

Paknahad M, Mortazavi SM, Shahidi S, Mortazavi G, Haghani M · 2016

Researchers prepared class V cavities in 20 extracted human premolars and randomly divided them into two groups of 10. The experimental group was exposed to 2.4 GHz Wi-Fi radiation for 20 minutes at a distance of 30 cm while the router communicated with a laptop 20 meters away. Mercury concentration in artificial saliva was significantly higher in the exposed group (0.056 ± .025 mg/L) than in the control group (0.026 ± .008 mg/L) (P =0.009).