Tillmann T et al. · 2007
Researchers exposed 1170 B6C3F1 mice to GSM signals at 902 MHz and DCS signals at 1747 MHz for 2 h per day, 5 days per week over 2 years at SAR levels of 0.4, 1.3, and 4.0 mW/g. Pairwise Fisher's test showed no significant increase in any tumor type in RF-exposed groups compared to sham-exposed groups. Observed tumor rates were within the range of historical control data for untreated mice.
Sage C, Johansson O, Sage SA · 2007
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.
Unknown authors · 2006
Two experiments were carried out to assess the effects of electric and magnetic fields on blood thyroxine in dairy cattle. In experiment 2, 16 nonlactating, nonpregnant, multiparous Holsteins were exposed to the same EMF with periods corresponding to one estrous cycle and blood samples were collected every other day, and the effect of period (P = .0009) and the treatment by days interaction (P = .0003) were statistically significant.
Unknown authors · 2006
The study used a crossover design with healthy premenopausal women exposed to a 60-Hz magnetic field of 5 to 10 mG greater than ambient levels for 5 consecutive nights during the early to midluteal phase of the menstrual cycle. Magnetic field exposure was associated with decreased 6-sulfatoxymelatonin levels, but no changes in reproductive hormone levels were observed. Participants using prescription medications and anovulatory participants had more pronounced decreases in 6-sulfatoxymelatonin levels with magnetic field exposure.
Unknown authors · 2006
Unknown authors · 2006
Researchers conducted a cross-sectional study of 780 children aged 0-12 years in two areas of Ismailia, Egypt. The exposed group comprised 390 children living within 50 meters of high voltage power lines, and the control group comprised 390 children from another area. Standard anthropometric measurements and hand X-rays for bone maturation were performed. Exposed children showed significantly reduced head and chest circumferences and height at all ages, and a significant delay in carpal bone ossification.
Unknown authors · 2006
Initial reports indicated that exposure of chicken eggs during embryonic development to power-line electric fields of 50 and 60 Hz at 10 V/m in air could cause the brain tissues of the hatched chickens to respond differently in a particular test. More recently, an anecdotal report of human sensitivity to EMF has appeared that shows a health-related influence of prior exposure history to particular power-line frequencies in chemically sensitized individuals. These reports open the question of whether the ambient electromagnetic environment can leave an imprint on developing organisms and if such imprint changes have the potential for health consequences.
Unknown authors · 2006
Researchers reanalyzed data from a previous study on 6-OHMS excretion in 60 women occupationally exposed to extremely low-frequency magnetic fields. Women were classified into four groups based on magnetic field exposure and light-at-night exposure. The group exposed to both magnetic fields and light at night had the lowest 6-OHMS excretion. The authors suggest that daytime magnetic field exposure may enhance the effects of nighttime light exposure on melatonin production.
Unknown authors · 2006
Researchers studied the effect of 50 Hz electromagnetic field on the thyroid gland using light and transmission electron microscopes. Two-month-old male rats were exposed to an EMF of 100-300 μT and 54-160 V m-1 for 4 h a day, 5 days a week for 1 month. The EMF group showed a predominance of microfollicles with less colloid content and dilated blood capillaries. Stereological counting revealed a statistically significant increase in the volume density of follicular epithelium, interfollicular tissue, blood capillaries, and the thyroid activation index, while the volume density of colloid significantly decreased.
Unknown authors · 2006
Hondou T et al et al. · 2006
Researchers conducted a numerical investigation using a realistic human body model and an actual elevator size to assess SAR from a mobile phone modeled as a dipole antenna at 16 mm from the head. They used finite-difference time-domain technique with a supercomputer at frequencies of 900, 1500, and 2000 MHz with 250 mW transmitting power. Results showed that peak 10-g SAR depends on passenger and antenna position, with substantial increases in whole-body average SAR and peak 10-g SAR in the elevator over free-space values. However, the maximum values met international RF safety guidelines, with whole-body average SAR at 4.4% and peak spatial-average SAR at 78% of the guideline.
Nam KC, Kim SW, Kim SC, Kim DW · 2006
Keow MA, Radiman S. · 2006
Researchers measured RF/MW levels emitted by the base stations. Measurements were performed at 200 sites around 47 mobile phone base stations. The RF/MW radiation from these base stations was well below the maximum exposure limits set by various agencies.
Wood A, Loughran S, Stough C · 2006
In a double-blind cross-over study, 55 adult volunteers were exposed to mobile phone emissions for 30 minutes at 0.25 W average power or sham exposure on successive nights. Urine was collected before bed and upon waking, and melatonin output was estimated from 6-sulphatoxymelatonin concentrations, urine volume, and creatinine. Total melatonin metabolite output did not differ between active and sham exposure, but pre-bedtime output normalized to creatinine was significantly lower after active exposure.
de Salles AA, Bulla G, Rodriguez CE. · 2006
Researchers simulated Specific Absorption Rate (SAR) in adult and child head models using the Finite Difference Time Domain method at 850 MHz and 1850 MHz. They used realistic head models with fitted electromagnetic parameters and tested microstrip and quarter-wavelength monopole antennas. The 1g-SAR for children was higher than for adults, exceeding 60% higher in the 10-year-old model. Results were compared with international recommendations.
Cooper TG, Mann SM, Khalid M, Blackwell RP. · 2006
The study assessed exposures of the general public to radio waves near 20 randomly selected GSM microcell and picocell base stations in the UK against ICNIRP guidelines. Exposures were generally in the range 0.002% to 2% of the ICNIRP general public reference level, with the greatest exposure quotient near any base station being 8.6%. Exposures close to microcell base stations were generally greater than those close to macrocell base stations.
Henderson SI, Bangay MJ. · 2006
Researchers measured radiofrequency signals from 60 base stations across five Australian cities at distances ranging from 50 to 500 m. All recorded exposure levels were well below the general public exposure limits of the ICNIRP guidelines and the Australian radiofrequency standard (ARPANSA RPS3). The highest level recorded from any single base station was 7.8 x 10(-3) W/m(2), which translates to 0.2% of the general public exposure limit.
Forgacs Z et al. · 2006
Researchers studied the possible effects of whole-body 1800 MHz GSM-like microwave exposure on male reproduction in mice. After repeated exposure at 0.018-0.023 W/kg SAR, an elevated serum testosterone level was measured, but no histopathological alteration could be detected in the reproductive organs. Leydig cell cultures from exposed animals did not differ from controls in their steroidogenic response.
Faraone et al. · 2006
Zhi-Jie Zheng et al. · 2005
Of 48,573 cardiac disease deaths in this age group, 31,827 (65.5%) occurred out of hospital. The leading underlying causes of out-of-hospital cardiac death were coronary heart disease (28.7%), cardiomyopathy (17.7%), and conduction disorders or dysrhythmias (13.6%). Age-adjusted out-of-hospital cardiac death rates increased from 1989–1990 to 1997–1998 by 11% in men, 33% in women, 11% in African Americans, and 19% in whites.
Unknown authors · 2005
Researchers measured tri-axial magnetic fields from 226 domestic appliances in 16 UK homes. Average magnetic field strength was 0.03 microT while background ellipticity averaged 47%. Microwave and electric ovens produced the highest ellipticities at 20 cm distance. Field strength and polarization showed a negative correlation. The authors conclude that ellipticity should be a metric for future epidemiological studies.
Unknown authors · 2005
An overwhelming percentage of general practitioners (up to 96%) to some degree, or totally, believe in a health-relevant role of environmental electromagnetic fields. Two-thirds are consulted occasionally or even frequently by self-declared electromagnetic hypersensitive patients. Only 4% mention having received information on "electromagnetic pollution" from such a source.
Unknown authors · 2005
Three talks covered cellular, animal, and epidemiological studies of static magnetic fields. The overall conclusion was that scientific evidence is weak with large gaps due to poor study quality or lack of research. Rapid technological development is increasing human exposure to stronger static magnetic fields. Knowledge about health effects lags far behind this technological development.
Unknown authors · 2005
The first study surveyed property valuers' perceptions of distribution equipment near residential property. The second study analyzed transaction data from a case study in Scotland. The paper presents initial findings from these studies.
