Unknown authors · 2011
The Health Council of the Netherlands examined whether exposure limits should shift from specific absorption rate to a maximum allowable temperature increase. The council evaluated this change across six criteria including consistency, applicability, and causality. The council concluded that changing the dosimetric quantity would not advance the debate on non-thermal effects from long-duration, low-intensity exposure. The council recommended keeping the current system of basic restrictions and reference levels expressed as SAR and in V/m or µT.
Unknown authors · 2011
The Health Council of the Netherlands examined whether electromagnetic field exposure limits should shift from measuring SAR (specific absorption rate) to measuring temperature increases. They concluded that maintaining current SAR-based limits is preferable and that changing the measurement approach wouldn't resolve scientific debates about non-thermal EMF effects.
Kumar S, Kesari KK, Behari J. · 2011
Researchers exposed male Wistar rats to a 2.45 GHz microwave field for two hours per day over 60 days. They also applied a 100 Hz pulsed electromagnetic field to some groups, either alone or combined with the microwave exposure. Microwave exposure significantly increased caspase and creatine kinase levels and decreased testosterone and melatonin. Pulsed electromagnetic field exposure relieves the effect of microwave exposure by inducing Faraday currents.
Sauter C et al. · 2011
Researchers tested 30 healthy young men exposed to GSM 900, WCDMA, and sham signals over nine study days. After correction for multiple testing, only time-of-day effects remained significant in two tests, resulting in faster reactions in the afternoon trials. Univariate comparisons revealed significant changes for GSM 900 only in the vigilance test. WCDMA exposure altered one parameter in vigilance and one in divided attention, while selective attention and the n-back task were not affected by either exposure.
Jin YB, Lee HJ, Seon Lee J, Pack JK, Kim N, Lee YS. · 2011
Researchers exposed two groups of 40 Sprague-Dawley rats to CDMA and WCDMA radiofrequency fields simultaneously at 2.0 W/kg each for 45 minutes per day, five days a week, for one year. No significant alteration in body weight was observed with the combined exposure. Total tumour incidence did not differ between exposed and sham-exposed animals. Most exposed rats showed no significant changes in urinalysis, haematology, blood biochemistry, or histopathology. However, some altered parameters in complete blood count and serum chemistry were seen in exposed rats.
Rufo MM, Paniagua JM, Jiménez A, Antolín A · 2011
Researchers measured radiofrequency total power densities and power density spectra in 35 towns in Extremadura, Spain. The spectra were taken with three antennas covering frequencies from 100 kHz to 2.2 GHz. Results showed power density levels below reference level guidelines for human exposure and differing across frequency ranges and town size categories.
Unknown authors · 2011
In part B, mice were transplanted intraperitoneally with ascites (Ehrlich-Lettre ascites, strain E) carcinoma cells and then exposed to 112 MHz amplitude-modulated radiation at 16 Hz and 2.45 GHz radiation separately for 14 days. No tumor development occurred in mice exposed to radiofrequency or microwave radiation after a single topical dose of DMBA. Mice transplanted with Ehrlich-Lettre ascites carcinoma cells and exposed to the fields showed a slight but insignificant increase in cell numbers compared to controls.
Ibitoye ZA, Aweda AM. · 2011
Keshvari J, Heikkilä T. · 2011
Researchers investigated SAR differences in child and adult head models using CAD models of commercial mobile phones as exposure sources. The main finding was that SAR distribution depends highly on antenna structure and phone model, making the exposure source type the key parameter. No systematic differences between child and adult heads were found from a volume-averaged SAR perspective. SAR values from generic source models could not be extrapolated to real device exposures.
Leung S et al. · 2011
This study examined sensory and cognitive processing in adolescents, young adults and older adults when exposed to 2G and 3G mobile phone signals. Forty-one 13–15 year olds, forty-two 19–40 year olds and twenty 55–70 year olds were tested using a double-blind cross-over design, where each participant received Sham, 2G and 3G exposures, separated by at least 4 days. On a memory task, adolescents performed less accurately during 3G exposure compared to Sham, and delayed brainwave responses were found in both 2G and 3G conditions across all age groups.
Croft RJ et al. · 2010
Researchers tested whether adolescents and the elderly are more sensitive to mobile phone-related bioeffects than young adults, using both 2G GSM and 3G W-CDMA exposures. Resting alpha activity in the 8-12 Hz band of the EEG was recorded and compared between conditions in a double-blind crossover design, with each participant receiving sham, 2G, and 3G exposures separated by at least 4 days. Young adults showed greater alpha activity in the 2G condition compared to sham, but no effect was found in adolescents or the elderly, and 3G exposure produced no effect in any group.
Fragopoulou et al · 2010
Unknown authors · 2010
Unknown authors · 2010
Researchers compared two methods for measuring radiofrequency radiation exposure safety limits in the 1-10 GHz range using computer models of adult and child heads. They found that the traditional SAR measurement works better at lower frequencies (1-3 GHz), while incident power density works better at higher frequencies (6-10 GHz). The study recommends switching measurement methods at 6 GHz to better protect against tissue heating from RF radiation.
Unknown authors · 2010
Researchers compared two methods for measuring RF radiation safety limits between 1-10 GHz using computer models of adult and child heads. They found that the traditional SAR measurement works better at lower frequencies (1-3 GHz), while incident power density is more appropriate at higher frequencies (6-10 GHz). The study recommends switching measurement methods at 6 GHz to better protect against tissue heating.
Unknown authors · 2010
Researchers compared two methods for measuring radiofrequency exposure safety in the 1-10 GHz range using detailed computer models of adult and child heads. They found that the traditional SAR measurement works better at lower frequencies (1-3 GHz), while incident power density is more appropriate at higher frequencies (6-10 GHz). The study recommends switching measurement methods at 6 GHz to better predict tissue heating.
Unknown authors · 2010
Researchers exposed rats to both CDMA (849 MHz) and WCDMA (1.95 GHz) cell phone frequencies simultaneously for one year at high power levels (4 W/kg total). While the study found no increase in chronic illness, blood tests revealed some changes in blood cell counts and blood chemistry parameters.
Vermeeren G et al. · 2010
Unknown authors · 2010
Researchers exposed MCF7 cells to single 837 MHz or combined 837 and 1950 MHz RF radiation at 4 W/kg for 1 hour. They assessed DNA synthesis rate, cell cycle distribution, and levels of cell cycle regulatory proteins including p53, p21, cyclins, and cyclin-dependent kinases. Neither single nor combined RF radiation exposure altered DNA synthesis, cell cycle distribution, or regulatory protein levels, unlike ionizing radiation which caused changes.
Unknown authors · 2010
Researchers exposed breast cancer cells to single (837 MHz) and combined (837 + 1950 MHz) radiofrequency radiation at 4 W/kg for one hour to test effects on cell division and DNA synthesis. Unlike ionizing radiation which disrupted cell cycles, neither single nor combined RF exposure affected cell division, DNA synthesis, or regulatory proteins that control cell growth.
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.
Peyman A, Gabriel C, Grant EH, Vermeeren G, Martens L · 2009
Unknown authors · 2009
They analyzed 53BP1 foci marking DNA repair sites using laser confocal microscopy. Microwaves inhibited 53BP1 focus formation in both human primary fibroblasts and mesenchymal stem cells, with the same GSM (915 MHz) and UMTS (1947.4 MHz) frequencies effective across all cell types. Exposure at 905 MHz did not inhibit foci in differentiated cells but showed some effects in stem cells, and stem cells did not adapt to chronic exposure over 2 weeks unlike fibroblasts.
Unknown authors · 2009
Researchers exposed human stem cells and mature cells to cell phone radiation at frequencies used by GSM (915 MHz) and UMTS (1947.4 MHz) networks. They found that radiation disrupted DNA repair processes more severely in stem cells than in mature cells, with stem cells showing impaired formation of proteins needed to fix DNA breaks. This matters because stem cells are particularly important for cancer development, and the study suggests they may be more vulnerable to cell phone radiation damage.
Eltiti S et al. · 2009
Researchers exposed 44 sensitive and 44 matched-control participants to GSM, UMTS, and sham signals for 50 minutes at 10 mW/m2 under double-blind conditions. Participants performed digit symbol substitution, digit span, and mental arithmetic tasks during exposure. Cognitive functioning and physiological measures including blood volume pulse, heart rate, and skin conductance were not affected by exposure.
