Bortkiewicz A, Gadzicka E, Szymczak W, Zmyślony M. · 2012
Researchers studied whether exposure to EMF from a mobile phone influenced tympanic temperature in ten healthy young men, aged 22.1±4.7 years. Each participant was examined three times: on a sham day with 2×60 minutes of no exposure, on a day with continuous 60-minute exposure followed by 60 minutes of no exposure, and on a day with intermittent exposure alternating 15-minute on and off periods. During continuous exposure, mean tympanic temperature was significantly higher than during sham exposure (p = 0.0001), while during intermittent exposure temperature was lower than on the sham day. The trends in tympanic temperature during the experiment differed significantly in relation to exposure conditions (p < 0.05).
Bourthoumieu S et al. · 2012
Researchers exposed human amniotic cells to GSM-900 radiofrequency fields for 24 hours at SARs of 0.25, 1, 2, and 4 W/kg. They measured p53 protein expression and phosphorylation at serine 15 and 37 using Western blot after three independent exposures from three donors. No significant changes in p53 expression or activation were found at any of the tested SARs up to 4 W/kg in human embryonic cells. Bleomycin-exposed cells served as a positive control.
Unknown authors · 2012
Researchers measured radiofrequency fields at public access points in 46 towns with 76 GSM cell sites in two major Ghanaian cities. Measurements used a log-periodic antenna coupled with a spectrum analyzer. At 900 MHz, levels ranged from 0.85 to 1.07 mW m⁻²; at 1800 MHz, from 0.78 to 1.19 mW m⁻². All measured levels complied with the ICNIRP limit, reaching only 0.024% of that limit. However, levels were 108 times higher than those found in a similar Ghanaian survey two years earlier.
Unknown authors · 2012
Researchers measured radiofrequency radiation levels near 76 cell phone towers across 46 towns in Ghana, focusing on public spaces like schools and markets. While radiation levels stayed within international safety guidelines, they were 108 times higher than measurements taken just two years earlier in the same country. The dramatic increase reflects Ghana's rapidly expanding mobile network infrastructure.
Ghosn R et al. · 2012
Volunteers participated in a double-blind, crossover study with sham and real GSM 900 MHz mobile phone exposure sessions lasting 20 minutes each. Middle cerebral artery blood flow velocity, pulsatility index, and resistance index were measured noninvasively with transcranial Doppler sonography before, during, and after exposure. No significant changes were detected in studied variables in middle cerebral arteries during sham or real exposure.
Sokolovic D et al. · 2012
Researchers exposed Wistar rats to microwave radiation for 4 hours per day and tested whether melatonin could counter any resulting changes in body mass or behaviour. A significant body mass reduction was noted in animals exposed to MW radiation when compared to controls after 20, 40 and 60 days (p<0.001). Exposed animals showed anxiety-related behaviour described as agitation and irritability after 10 days of exposure, and these changes became less noticeable after the radiation source was removed. Melatonin pretreatment significantly increased body weight in irradiated rats compared to irradiated rats without melatonin after 20 days (p<0.05), and melatonin administration caused a decrease in stress-induced behaviour.
Tomitsch J, Dechant E. · 2012
Celikozlu SD et al. · 2012
Researchers exposed rats to magnetic fields via cell phones during prenatal and postnatal periods until the rats were 80 days old. The study measured blood parameters and neurons in the brain of rats. Magnetic field exposure decreased pyramidal neuron numbers 51.15% and increased ischemic neuron numbers 73% at the cortex region of the brain. In the hippocampus, magnetic fields increased the amount of ischemic neurons three-fold compared to the control, while hippocampal pyramidal cell numbers were not affected.
Murbach M et al · 2012
The system provides the same exposure of the lateral cerebral cortex at two different RF frequencies (900 and 2140 MHz) but with different exposure levels at subcortical structures. The RF modulation and ELF signal are generated by a freely programmable arbitrary signal generator enabling simulation of worst-case exposure scenarios from wireless devices. The maximum achievable RF exposure exceeds 60 W/kg peak spatial specific absorption rate averaged over 10 g of tissue.
Trivino Pardo JC, Grimaldi S, Taranta M, Naldi I, Cinti C. · 2012
Researchers cultured acute T-lymphoblastoid leukemia cells (CCRF-CEM) and exposed them to 900 MHz microwave EMF from a TEM cell at short and long exposure times. They evaluated the effect of high-frequency EMF on gene expression and identified functional pathways influenced by the exposure.
Tsybulin O, Sidorik E, Kyrylenko S, Henshel D, Yakymenko I. · 2012
Researchers exposed fresh fertilized Japanese quail eggs to GSM 900 MHz cell phone radiation at 0.2 μW/cm² for either 38 hours or 14 days. The 38-hour exposure significantly increased the number of differentiated somites, and the 14-day exposure significantly increased total embryo survival. Hatchlings from exposed eggs showed significantly higher levels of thiobarbituric acid reactive substances in brain and liver tissue.
Hekmat A, Saboury AA, Moosavi-Movahedi AA. · 2012
Researchers exposed calf thymus DNA to mobile phone radiofrequency fields at 940 MHz, 15 V/m, and a SAR of 40 mW/kg, then examined the DNA immediately after exposure and again two hours after a 45-minute exposure using several laboratory instruments. UV-vis and circular dichroism experiments showed that the EMFs caused disturbance in the DNA structure. Exposed DNA samples were relatively thermally unstable compared to unexposed DNA, and showed more fluorescence emission, which the researchers suggested may have occurred due to expansion of the exposed DNA structure. The structure of the DNA immediately after exposure was not significantly different from the DNA sample two hours after the 45-minute exposure, suggesting the changes were irreversible.
Fattahi-Asl J et al. · 2012
Fifty human serum wells from 25 normal healthy donors were labeled with ruthenium for an immunoassay and placed into two batches. The first batch was exposed to 900 MHz radiation from a Nokia 1202 cell phone in speech mode for 30 minutes. Ferritin levels in the exposed batch averaged 84.94 ± 1.04 μg/L versus 87.25 ± 0.83 μg/L in the unexposed batch, a significant decrease (P = 0.029).
Kwon MS et al. · 2012
Researchers investigated effects of 902.4 MHz GSM radiation on cerebral blood flow using PET with 15O-water tracer. Fifteen young healthy men were exposed to radiation at three head locations and sham exposure while performing a visual task. Exposure caused slight ear canal temperature rise but did not affect brain hemodynamics or task performance. Results showed no evidence of acute effects on cerebral blood flow.
Kwon MS et al. · 2012
Finnish researchers used advanced brain imaging (PET scans) to measure blood flow in the brains of 15 men while they were exposed to cell phone radiation for 5 minutes from different positions around their heads. The study found no changes in brain blood flow despite the radiation causing a slight temperature increase in the ear canals, suggesting that short-term cell phone exposure doesn't immediately affect how blood circulates in the brain.
Unknown authors · 2012
Researchers exposed male Sprague-Dawley rats to RF-EMF for 45 minutes per day, five days per week, for up to eight weeks. Each signal had a whole-body average SAR of 2.0 W/kg. The combined exposure did not affect the measured immune parameters.
Unknown authors · 2012
Researchers exposed rats to combined CDMA (849 MHz) and WCDMA (1.95 GHz) cell phone signals at high power levels for 8 weeks, testing multiple immune system markers. The study found no detectable effects on immune function, including blood cell counts, immune cell populations, or inflammatory proteins.
Sun W, Shen X, Lu D, Fu Y, Lu D, Chiang H · 2012
Researchers investigated the effects of 1.8-GHz RFR at different intensities on EGF receptor clustering and phosphorylation in human amniotic (FL) cells. Receptor clustering was analyzed by immunofluorescence with confocal microscopy, and phosphorylation was measured by western blot. Exposure at SAR 0.5, 1.0, 2.0, and 4.0 W/kg significantly induced clustering and phosphorylation, while SAR 0.1 W/kg had no significant effect. The authors concluded that membrane receptors may be a primary target of RFR, with a dose-rate threshold between 0.1 and 0.5 W/kg and a sigmoid dependence on intensity.
Hintzsche H et al. · 2012
Nittby H et al. · 2012
Researchers exposed 29 land snails of the strain Helix pomatia to GSM electromagnetic fields at 1900 MHz at 48 mW/kg for 1 hour each, while 29 snails served as sham controls. Before and after exposure, snails were placed on a hot plate and the time until they retracted was measured by two blinded observers. GSM-exposed snails were less sensitive to thermal pain compared to sham controls, indicating a significant analgesia (Mann-Whitney p < 0.001).
Akar A et al. · 2012
Researchers exposed adult male Wistar rats to 2.45 GHz microwave radiation at a SAR of 0.25 W/kg for 2 hours each day for 21 days and then measured corneal thickness using histological and stereological methods. Overall corneal thickness was 278.9 ± 54.5 μm in the control group and 272.4 ± 85.6 μm in the study group, with no statistically significant difference between groups. Anterior corneal epithelium thickness was 28.1 ± 4.9 μm in the control group and 31.7 ± 5.5 μm in the exposed group, a statistically significant difference. The researchers concluded that exposure to microwave radiation might cause alterations in the rat cornea.
Nittby H et al. · 2012
Researchers exposed land snails to cell phone radiation at 1900 MHz for one hour and tested their response to heat-induced pain. The exposed snails showed reduced sensitivity to thermal pain compared to unexposed controls, suggesting the radiofrequency radiation acted as a pain reliever. This finding indicates that non-thermal levels of cell phone radiation can alter nervous system responses in living organisms.
Joseph W, Goeminne F, Vermeeren G, Verloock L, Martens L. · 2012
Researchers assessed electromagnetic exposure from 14 types of air traffic control systems for both workers and the general public. In total, 50 sites were investigated at 1,073 locations in the frequency range of 255 kHz to 24 GHz. Two system types, Non-Directional Beacons (up to 881.6 V m) and DVOR (up to 92.3 V m), exhibited levels requiring recommended minimum distances so that ICNIRP reference levels are not exceeded. When multiple radiofrequency sources were present together, the air traffic control source was found to dominate total exposure in its neighborhood.
Lahham A, Hammash A. · 2012
Researchers measured radiofrequency power density at 65 locations across the West Bank. The average power density from FM radio was 0.148 μW cm(-2), from TV broadcasting 0.007 μW cm(-2), and from mobile phone base stations 0.089 μW cm(-2). The average total exposure from all sources was 0.37 μW cm(-2). The maximum total exposure at any location was 3.86 μW cm(-2), with an exposure quotient of 0.02, indicating compliance with international guidelines. FM radio contributed about 62% of total exposure, mobile phone base stations 35%, and TV broadcasting 3%.
Bodera P et al. · 2012
Polish researchers exposed rats to cell phone frequency radiation (1800 MHz) and found it interfered with tramadol, a common painkiller used for moderate to severe pain. The electromagnetic fields didn't change pain levels on their own, but they significantly reduced the effectiveness of the pain medication 30 minutes after injection. This suggests that EMF exposure from devices like cell phones might interfere with how our bodies process certain medications.
