Research on electromagnetic radiation from utility smart meters using RF communication.
Smart meters are digital utility devices that automatically transmit your energy usage data to power companies using radiofrequency (RF) electromagnetic fields in the 900 MHz to 2.4 GHz range. Unlike the old analog meters that required manual readings, these devices communicate wirelessly multiple times per day, creating a new source of EMF exposure directly on your home.
Lixia S et al. · 2006
Researchers exposed human eye lens cells to cell phone radiation at different power levels for 2 hours. Higher exposures caused temporary DNA damage and triggered cellular stress responses, suggesting that phone radiation can affect eye cells even without heating tissue.
Pavicic I, Trosic I, Sarolic A · 2006
Researchers compared the effects of 864 MHz and 935 MHz microwave radiation on V79 cell proliferation, colony formation, and viability. Cells exposed to 864 MHz for 2 or 3 hours showed significantly reduced growth on day 3, whereas 3-hour 935 MHz exposure significantly increased growth. Colony-forming ability and viability did not differ significantly from controls for either frequency.
Papageorgiou CC et al. · 2006
Exposure increased the amplitude of P50 evoked by low-frequency stimuli at the Fp1 and O1 electrode leads. Exposure decreased the amplitude of P50 evoked by high-frequency stimuli at the Fp1 electrode lead.
Vian A et al. · 2006
The study aimed to investigate how microwave irradiation affects gene expression in plants. Researchers used a carefully calibrated system that mimics environmental electromagnetic fields to measure changes in mRNA encoding a stress-related bZIP transcription factor. Exposure to low-amplitude, short-duration 900 MHz EMF evoked a rapid 3.5-fold accumulation of this mRNA, peaking 5–15 minutes after stimulation, similar to mechanical stimulation.
Lantow M, Schuderer J, Hartwig C, Simko M. · 2006
Heat and PMA treatment significantly increased superoxide radical anions and ROS production in Mono Mac 6 cells. No significant differences in free radical production were detected after RF EMF exposure compared to controls. The GSM-DTX signal at 2 W/kg showed a significant difference versus sham due to a decreasing sham value, but this difference disappeared when compared to incubator controls. No significant effects on HSP70 expression were detected after RF EMF exposures.
Verschaeve L et al. · 2006
Researchers investigated combined genotoxic effects of 900 MHz radiofrequency fields and the drinking water mutagen MX in female rats over two years. MX induced DNA damage in rat brain but not in blood or liver cells. Co-exposure to RF fields and MX did not significantly increase DNA damage in blood, liver, or brain compared to MX alone. The study used alkaline comet assay and micronucleus tests on samples taken at multiple time points.
Remondini D et al. · 2006
Researchers exposed six human cell types to 900 and 1800 MHz microwaves and analyzed gene expression using whole-genome cDNA arrays. NB69 neuroblastoma cells, T lymphocytes, and CHME5 microglial cells did not show significant changes in gene expression. EA.hy926 endothelial cells, U937 lymphoblastoma cells, and HL-60 leukemia cells showed between 12 and 34 up- or down-regulated genes. The affected gene families did not indicate a stress response.
Scarfi MR et al. · 2006
Researchers exposed human peripheral blood lymphocytes from 10 healthy donors to 900 MHz GSM signals at SARs of 0, 1, 5, and 10 W/kg for 24 hours. The cytokinesis-block micronucleus assay showed no genotoxic or cytotoxic effects across the range of SARs investigated. Two independent laboratories (ENEA Rome and CNR-IREA Naples) each tested five donors and cross-scored slides, confirming the findings.
Thorlin et al. · 2006
Researchers exposed cultured astroglial and microglial cells to 900 MHz microwave radiation at various SARs and durations. They measured markers including interleukin 6, tumor necrosis factor-alpha, glial fibrillary acidic protein, total protein, and ED-1. No significant differences were found for any parameter at any time or radiation characteristic. Total protein levels remained constant and cell morphology appeared unaffected. The study concluded no evidence for effects on damage-related factors in glial cells.
Aitken RJ, Bennetts LE, Sawyer D, Wiklendt AM, King BV. · 2005
Researchers exposed mice to 900 MHz RFEMR at a specific absorption rate of approximately 90 mW/kg inside a waveguide for 7 days at 12 h per day. Sperm number, morphology, and vitality were not significantly affected by the exposure. However, detailed DNA analysis using QPCR revealed statistically significant damage to both the mitochondrial genome and the nuclear beta-globin locus.
Oktem F, Ozguner F, Mollaoglu H, Koyu A, Uz E. · 2005
Researchers exposed rats to 900-MHz mobile phone radiation for 30 minutes daily over 10 days. Exposure increased kidney tissue malondialdehyde and urine N-acetyl-beta-d-glucosaminidase while decreasing superoxide dismutase, catalase, and glutathione peroxidase activities. Melatonin administered before each exposure reversed these changes. The authors concluded that melatonin may protect against mobile phone-induced kidney impairment in rats.
Oktem F, Ozguner F, Mollaoglu H, Koyu A, Uz E · 2005
Researchers exposed rats to 900-MHz cell phone radiation for 30 minutes daily over 10 days and found significant kidney damage through oxidative stress (cellular damage from harmful molecules called free radicals). The study showed increased markers of kidney damage and reduced antioxidant defenses, but when rats were given melatonin before exposure, these harmful effects were largely prevented.
Huber R et al. · 2005
Researchers investigated the effects of radio frequency electromagnetic fields similar to those emitted by mobile phones on waking regional cerebral blood flow in 12 healthy young men. Positron emission tomography scans were taken after 30 min unilateral head exposure to pulse-modulated 900 MHz RF EMF, and a sham control condition was also included. Only the 'handset-like' signal, which had stronger low-frequency components, increased relative cerebral blood flow in the dorsolateral prefrontal cortex on the side of exposure; the 'base-station-like' signal did not.
Ozguner M et al. · 2005
Twenty adult male Sprague-Dawley rats were randomized into a control group and an EMF group exposed to 900 MHz EMF for 30 minutes per day, 5 days a week for 4 weeks. Testicular weight, biopsy score, and interstitial tissue percentage did not differ significantly between groups. Seminiferous tubule diameter and germinal epithelium height were significantly decreased in the EMF group. Serum testosterone was significantly lower in the EMF group, while LH and FSH did not change significantly.
Curcio G et al. · 2005
Researchers recorded resting EEG from 20 healthy subjects to study the effect of mobile phone EMF on waking brain activity. Subjects were randomly assigned to two groups and exposed double-blind to a 902.40 MHz signal modulated at 217 Hz with 0.25 W average power before or during EEG recording. Real exposure influenced alpha band spectral power in some bins compared to baseline and sham, with a greater effect when the EMF was on during recording. The authors concluded that pulsed high-frequency EMF can affect normal brain functioning, but no health effect conclusions were drawn.
Ozguner F et al. · 2005
Researchers exposed rats to 900 MHz EMR radiation for 30 minutes per day over 10 days and measured oxidative stress markers and antioxidant enzyme activities. Exposure increased MDA and NO levels and decreased SOD, CAT, and GSH-Px activities in myocardial tissue. Treatment with CAPE reversed these changes, indicating a protective effect against mobile phone-induced oxidative heart injury.
Markovà E, Hillert L, Malmgren L, Persson BR, Belyaev IY. · 2005
Researchers investigated the effects of GSM microwaves at different carrier frequencies on human lymphocytes from healthy persons and from persons reporting hypersensitivity to electromagnetic fields. They measured changes in chromatin conformation and analyzed proteins 53BP1 and gamma-H2AX, which have been shown to colocalize in distinct foci with DNA double-strand breaks. GSM microwaves affected chromatin conformation and 53BP1/gamma-H2AX foci similar to heat shock, and on average the same response was observed in lymphocytes from hypersensitive and healthy subjects.
Preece AW et al. · 2005
Researchers tested 18 children aged 10 to 12 years using a randomized three-way crossover design with exposures of 0, 0.025, or 0.25 W from a Nokia 3110 handset. Baseline reaction times were considerably slower than in adults. There was a tendency for shorter reaction times during exposure, most marked for simple reaction time, but no effects reached statistical significance after Bonferroni correction.
Koyu A, Cesur G, Ozguner F, Akdogan M, Mollaoglu H, Ozen S. · 2005
The study examined effects of 900 MHz EMF on thyroid hormones in adult male Sprague-Dawley rats. Thirty rats were divided into control, EMF-exposed, and sham-exposed groups of ten each. Exposed rats received 30 minutes of EMF per day, five days a week, for four weeks. TSH and T3-T4 levels were significantly lower in the EMF group than in the sham group (p<0.01). No significant differences were found between control and sham groups (p>0.05).
Haarala C et al. · 2005
Researchers exposed 32 children aged 10-14 to a 902 MHz GSM mobile phone in active and inactive conditions while they performed cognitive tests. Statistical analysis showed no significant differences in reaction times or accuracy between the phone-on and phone-off conditions across all tests. The authors concluded that a standard mobile phone has no effect on children's cognitive function as measured by response speed and accuracy.
Belyaev IY et al. · 2005
Researchers exposed human lymphocytes from healthy subjects and from persons reporting hypersensitivity to electromagnetic field (EMF) to 915 MHz microwaves and 50 Hz magnetic field, then measured chromatin conformation and markers of DNA damage. Both exposures caused significant chromatin condensation, similar to heat shock at 41 °C, but no significant differences were found between hypersensitive and healthy subjects. Neither 915 MHz nor 50 Hz exposure induced 53BP1 foci, and no apoptosis was induced.
Belyaev et al. · 2005
Researchers exposed human immune cells to cell phone radiation (915 MHz) and power line magnetic fields. Both exposures caused cellular stress responses similar to heat shock, affecting how DNA is packaged inside cells. This occurred equally in healthy people and those reporting electromagnetic sensitivity.
Tkalec M, Malaric K, Pevalek-Kozlina B. · 2005
Researchers evaluated duckweed growth and peroxidase activity after exposure in a Gigahertz Transversal Electromagnetic (GTEM) cell to electric fields at frequencies of 400, 900, and 1900 MHz. Plants exposed for 2 h to a 23 V/m field at 900 MHz showed significantly decreased growth compared with the control, while the same field strength at 400 MHz did not have such an effect. Peroxidase activity in exposed plants varied depending on exposure characteristics, with a significant increase of 41% found in plants exposed for 2 h to 41 V/m at 900 MHz.
Ozguner F, Oktem F, Ayata A, Koyu A, Yilmaz HR. · 2005
Zeni O et al. · 2005
Researchers exposed human peripheral blood leukocytes from healthy volunteers to a 900 MHz GSM signal for 2 hours at SARs of 0.3 and 1 W/kg. DNA damage was assessed with the comet assay, chromosome aberrations and sister chromatid exchanges were measured in stimulated lymphocytes, and cell proliferation was evaluated via the mitotic index. No statistically significant differences were observed between exposed and sham-exposed samples for any of these endpoints, while positive controls showed the expected increases in DNA damage.