Unknown authors · 2011
Researchers exposed human hair follicle cells to 1,763 MHz radiofrequency radiation at 10 W/kg and found it stimulated hair growth by increasing insulin-like growth factor-1 (IGF-1) production. The RF exposure enhanced hair shaft elongation in laboratory cultures and increased cell division markers in hair follicles. This suggests that specific RF frequencies might promote hair growth through cellular signaling pathways.
Trosić I et al. · 2011
Researchers exposed rats to cell phone radiation (915 MHz) for one hour daily over two weeks. DNA damage was found in liver and kidney cells using comet assay testing. This suggests short-term radiofrequency exposure at cell phone levels can cause genetic damage in organs.
Trosić I et al. · 2011
Researchers exposed rats to cell phone radiation at 915 MHz for one hour daily over two weeks and examined DNA damage in brain, liver, and kidney cells using a comet assay test. They found measurable DNA breaks in liver and kidney cells, with less pronounced effects in brain cells. This suggests that radiofrequency radiation at levels similar to cell phone emissions can cause genetic damage in multiple organs.
Masuda H et al. · 2011
The study aimed to detect reproducible responses to local radiofrequency exposure in the parietal cortex of anesthetized rats and to determine their dependence on exposure intensity. The target cortex tissue was locally exposed to 2-GHz RF using a figure-eight loop antenna at averaged specific absorption rates of 10.5, 40.3, 130, and 263 W/kg. All measured parameters except calf hypodermis temperature increased significantly in exposed animals compared with sham-exposed ones during 18-min exposures. The local cerebral blood flow elevation seemed to be driven by the rise in target temperature, but not by rectal temperature, in the early part of RF exposure or at low-intensity RF exposure.
Papageorgiou CC et al. · 2011
Fifteen male and fifteen female subjects, matched for age and education level, were investigated while performing a modified version of the Hayling Sentence Completion test adjusted to induce working memory. ERPs were recorded at 30 scalp electrodes, both without and with exposure to a Wi-Fi signal. Male subjects showed decreased P300 amplitudes compared to female subjects, but only in the presence of Wi-Fi EMF. The researchers concluded that Wi-Fi exposure may exert gender-related alterations on neural activity associated with attentional resources during a linguistic working-memory test.
Masuda H et al. · 2011
Japanese researchers exposed rat brain tissue to 2-GHz radiofrequency radiation at various intensities and measured changes in blood flow and temperature. They found that RF exposure significantly increased both local brain blood flow and temperature in a dose-dependent manner - the higher the exposure, the greater the response. This demonstrates that RF radiation directly affects brain physiology by triggering the body's natural response to increased heat in brain tissue.
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.
Lindholm H et al. · 2011
Each exposure and sham period lasted 15 minutes and took place in a climatic chamber under controlled thermoneutral conditions. They measured ear canal temperature, skin temperature at multiple sites, local cerebral blood flow via near-infrared spectroscopy, and autonomic nervous system function via ECG and continuous blood pressure. During the short-term RF exposure, local cerebral blood flow did not change, ear canal temperature did not increase significantly, and autonomic nervous system function was not interfered with.
Bourthoumieu S et al. · 2011
Researchers investigated the potential induction of genomic instability by GSM-900 MHz radiofrequency radiation in human amniotic cells exposed for 24 h to average-specific absorption rates (SAR) of 0.25, 1, 2 and 4 W/kg. The rate of aneuploidy of chromosomes 11 and 17 was determined by interphase FISH immediately after independent exposure of three different donors for 24 h. No significant change in the rate of aneuploidy of chromosomes 11 and 17 was found at average SAR up to 4 W/kg.
Cammaerts MC, Debeir O, Cammaerts R. · 2011
Researchers examined Paramecium caudatum under normal conditions and near a switched-on GSM telephone operating at 900 MHz and 2 Watts. Exposed individuals moved more slowly and more sinuously than unexposed ones. Their physiology was affected: they became broader, their cytopharynx appeared broader, pulse vesicles had difficulty expelling content, cilia moved less efficiently, and trichocysts became more visible.
Liu ML, Wen JQ, Fan YB. · 2011
Researchers investigated whether green tea polyphenols could protect cultured rat cortical neurons from injury caused by 1800 MHz electromagnetic field exposure from a mobile phone. Mobile phone irradiation for 24 hours induced marked neuronal cell death, as measured by MTT and TUNEL assays. Green tea polyphenols significantly inhibited the radiation-induced increases in active Bax, while total Bax levels showed no marked changes.
Liu ML, Wen JQ, Fan YB. · 2011
Researchers exposed rat brain cells to 1800 MHz cell phone radiation for 24 hours and found it caused significant brain cell death. However, when they treated the cells with green tea polyphenols (antioxidant compounds found in green tea), the protective compounds significantly reduced the radiation-induced brain cell damage. This suggests that certain natural antioxidants might help protect brain cells from the harmful effects of cell phone radiation.
Kaprana AE et al. · 2011
Researchers exposed rabbits to cell phone radiation (GSM-900) and measured how it affected their hearing pathway using auditory brainstem response tests. They found that the radiation caused statistically significant delays in nerve signal transmission through the hearing system, with effects appearing as early as 15 minutes of exposure. The changes returned to normal 24 hours after exposure ended, suggesting the auditory system responds to cell phone radiation as a biological stressor.
Lukac N et al. · 2011
Researchers exposed bovine semen to 1800 MHz GSM-like RF-EMW in vitro and measured motility at 0, 30, 120, and 420 minutes using a computer-assisted semen analyzer. The percentage of motile and progressively motile sperm decreased significantly after 120 and 420 minutes of exposure. Average path distance decreased after 30 and 420 minutes, while path velocity initially increased at 30 minutes but decreased at 420 minutes. Amplitude of lateral head displacement also decreased significantly after 420 minutes.
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.
Unknown authors · 2011
Researchers measured electromagnetic field levels in 213 bedrooms over three years (2006-2009) to track exposure trends. They found power line electric and magnetic fields decreased slightly, but radiofrequency radiation from cell towers and WiFi increased by 44%. This reflects our rapidly expanding wireless infrastructure directly impacting home environments.
Deltour I et al. · 2011
Researchers analyzed the three-dimensional SAR distribution in phantom models to detect clusters of phones, summarizing each phone by a half-ellipsoid above half the maximum SAR and using Partitioning Around Medoids with ellipsoid overlap and Manhattan distance. Weak clustering was found for handset shape (bar phone, flip with top and flip with central antennas) but only in specific positions (tilt or cheek) within the 800 MHz band and partly in 900 and 1800 MHz bands. On 120 phones, the three-dimensional SAR distribution did not appear related to external phone characteristics or measurement characteristics that could refine exposure assessment in epidemiological studies such as Interphone.
Unknown authors · 2011
The study found no effect on the hematopoietic system in rats exposed to 900 MHz CW RF at 2 W/kg SAR. The exposure level was the ICNIRP public exposure limit for localized SAR.
Unknown authors · 2011
Researchers exposed rats to 900 MHz radiofrequency radiation at 2 W/kg (the ICNIRP public exposure limit) and found no effects on their blood-forming system. This frequency is close to cell phone radiation, and the exposure level matches international safety guidelines. The study suggests that RF exposure at current regulatory limits may not harm blood cell production.
Unknown authors · 2011
Researchers exposed rats to 900 MHz radiofrequency radiation at 2 W/kg (the safety limit for public exposure) and found no effects on their blood-forming system. The study examined whether cell phone frequency radiation at regulatory limits harms the production of blood cells. Results showed the hematopoietic system remained normal under these exposure conditions.
Kos B, Valič B, Kotnik T, Gajšek P. · 2011
Researchers investigated occupational exposure to electromagnetic fields in front of a multi-band base station antenna at 900, 1800, and 2100 MHz. The highest frequency of 2100 MHz resulted in the highest spatial-peak SAR averaged over 10 g of tissue, while whole-body SAR was similar at all three frequencies. At distances greater than 200 mm, whole-body SAR was the more limiting factor for compliance, while at shorter distances spatial-peak SAR may be more limiting.
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.
Partsvania B, Sulaberidze T, Shoshiashvili L, Modebadze Z · 2011
Researchers exposed single neurons of a mollusk to electromagnetic fields using a Transverse Electromagnetic Cell to study effects on neuron excitability and memory processes. The specific absorption rate deposited into the single neuron was calculated to be 0.63 W/kg with a temperature increment of 0.1°C. After acute exposure, the average firing threshold of action potentials was not changed, but the average latent period was significantly decreased. The researchers noted that the observed alterations were transient and that only the latent period remained at the changed level.
