Ozgur E et al. · 2013
Researchers exposed pregnant rabbits and their offspring to 1800 MHz cell phone radiation (similar to GSM signals) for short periods daily. They found that this exposure caused oxidative stress and altered blood chemistry in the infant rabbits, with different effects in males versus females. This suggests that developing animals may be particularly vulnerable to radiofrequency radiation during critical growth periods.
Furtado-Filho OV et al. · 2013
Brazilian researchers exposed young rats to 950 MHz radiofrequency radiation (similar to older cell phone frequencies) for 30 minutes daily from birth through 30 days of age. While the study found no oxidative stress or DNA damage in most age groups, 30-day-old rats showed genetic damage in liver cells, and newborns had altered fatty acid levels and reduced antioxidant enzyme production.
Vijver MG et al. · 2013
A field experiment exposed four invertebrate species at different distances from a GSM 900 MHz transmitter for 48 hours, with controls shielded by Faraday cages. The response variables measured were fecundity and number of offspring. Results showed no significant impact of EMF exposure on reproductive endpoints, and distance was not an adequate proxy for dose-response.
Akdag MZ, Dasdag S, Cakir DU, Yokus B, Kizil G, Kizil M. · 2013
Researchers exposed adult male Sprague-Dawley rats to 50 Hz ELF magnetic fields at 100 or 500 μT for 2 hours per day for 10 months, then measured beta-amyloid protein, protein carbonyl, and malondialdehyde in the brain. Protein carbonyl and malondialdehyde levels were increased by exposure to both field strengths, while beta-amyloid protein levels were not significantly changed.
Akdag MZ, Dasdag S, Cakir DU, Yokus B, Kizil G, Kizil M. · 2013
Researchers exposed rats to magnetic fields at levels considered safe by current standards for 10 months. The exposure significantly increased two markers of brain cell damage and aging, suggesting that even "safe" magnetic field levels may cause harmful oxidative stress in brain tissue over time.
Havas M, Marrongelle J · 2013
This study replicated earlier research by analyzing heart rate variability (HRV) responses in 69 subjects between the ages of 26 and 80 in both Canada and the USA. Subjects were exposed for 3-minute intervals to radiation generated by a 2.4-GHz cordless phone base station at 3-8 μW/cm². Based on HRV analyses, 7% of subjects were classified as "moderately to very" sensitive, 29% as "little to moderately" sensitive, and 30% as "not to little" sensitive.
Havas M, Marrongelle J. · 2013
Researchers exposed 69 people to radiation from a 2.4-GHz cordless phone base station for 3-minute intervals and measured their heart rate variability (how the heart rhythm changes in response to stress). They found that 36% of participants showed some degree of sensitivity to the electromagnetic radiation, with their hearts responding as if experiencing stress. The study suggests that heart rate variability testing could help identify people who are electromagnetically sensitive.
Sharma A, Sisodia R, Bhatnagar D, Saxena VK · 2013
Researchers exposed Swiss albino mice to 10 GHz microwaves at a power density of 0.25 mW/cm2 for 2 hours per day for 30 days, then tested spatial memory using the Morris water maze test. Exposed mice showed statistically significant higher mean latency to reach the target quadrant compared to sham-exposed mice. A decrease in protein levels was also estimated in the whole brain of exposed mice compared to sham-exposed mice.
Trošić I, Mataušić-Pišl M, Pavičić I, Marjanović AM. · 2013
Researchers divided 18 adult male rats into two groups of nine and exposed one group to a 915 MHz RF field with a power density of 2.4 W m(-2) and a field strength of 30 V m(-1) for one hour daily over two weeks. Body mass and temperature were measured before and after each exposure, after which testes were prepared for histology and epididymal sperm were assessed for quantity, quality, and morphology. No statistically significant alterations were found in any endpoint, and the authors concluded that short-time intermittent RF exposure does not represent a significant risk factor for rat reproductive functions.
Trošić I, Mataušić-Pišl M, Pavičić I, Marjanović AM · 2013
Croatian researchers exposed 18 male rats to 915 MHz radiofrequency radiation (similar to older cell phones) for one hour daily over two weeks to study effects on reproductive health. They found no statistically significant changes in testicular structure, sperm count, sperm mobility, or sperm shape compared to unexposed control rats. The study concluded that short-term intermittent RF exposure at these levels does not harm male reproductive function in rats.
Glinka M, Sieroń A, Birkner E, Cieślar G · 2013
Researchers measured the activity of antioxidant enzymes and a lipid peroxidation marker in male rats exposed to an extremely low-frequency magnetic field during skin wound healing. Each animal had an experimental cut wound on its back. The 40 Hz, 10 mT exposure was associated with increased glutathione peroxidase activity in serum and decreased malone dialdehyde in liver tissue, which the researchers described as suggesting inhibition of phospholipid peroxidation and stabilization of cellular membranes.
Köktürk S et al. · 2013
Researchers exposed rats to electromagnetic fields during pre- and postnatal periods until postnatal day 80, with one group receiving daily oral Lycopersicon esculentum extract at approximately 2 g/kg. Compared to unexposed controls, EMF-exposed rats showed a significant increase in caspase-3-labeled Purkinje neurons and granule cells, and Purkinje neurons exhibited dark neuron degenerative changes. Rats given the extract alongside EMF exposure had significantly fewer caspase-3-labeled neurons and fewer dark Purkinje neurons than EMF-only rats. The authors concluded that Lycopersicon esculentum exerted a protective effect against EMF-induced apoptosis and neurodegeneration in the cerebellum.
Aït-Aïssa S et al. · 2013
French researchers exposed pregnant rats and their offspring to WiFi signals (2.4 GHz) from pregnancy through 5 weeks after birth, then examined their brains for signs of cellular stress and damage. They found no differences in stress markers between WiFi-exposed and unexposed rat pups, even at exposure levels up to 4 W/kg. The study suggests that WiFi exposure during critical developmental periods may not cause detectable brain damage in young rats.
Zhang C, Li Y, Wang C, Lv R, Song T · 2013
Researchers exposed Sprague-Dawley rats to ELF-MF at 100 µT and 50 Hz with or without oral aluminum for 12 weeks. Oral aluminum treatment caused learning and memory impairment, neuronal cell loss, and high amyloid-β density in the hippocampus and cerebral cortex. ELF-MF alone showed no significant effect on Alzheimer's disease pathogenesis. Combined ELF-MF and aluminum exposure did not cause more damage than aluminum alone.
Zhang C, Li Y, Wang C, Lv R, Song T. · 2013
Researchers exposed rats to 50 Hz magnetic fields (the type from power lines) for 12 weeks to see if this exposure would worsen Alzheimer's-like symptoms caused by aluminum poisoning. They found that magnetic field exposure alone had no effect on brain function or Alzheimer's markers, and it didn't make aluminum-induced brain damage any worse. This suggests that power-frequency magnetic fields may not contribute to Alzheimer's disease development.
Amirifalah Z, Firoozabadi SM, Shafiei SA. · 2013
Researchers exposed 10 healthy women to a pulsed extremely low-frequency magnetic field at the central brain areas corresponding to electrodes C3 and C4, then measured changes in EEG activity. After exposure, beta (15-25 Hz), sensorimotor rhythm (13-15 Hz), and theta (4-8 Hz) powers were significantly decreased by 12.0% to 26.6% at 10 Hz in the C3 and C4 regions, compared with values measured during exposure. The study suggests that this technique may be applied in the treatment of anxiety, though further investigation is needed.
Calderón C et al. · 2013
Nasri K, Daghfous D, Landoulsi A. · 2013
The study evaluated the effects of sub-lethal microwave radiation on Salmonella typhimurium. The bacteria were exposed to a dose of 3600 J delivered as a 40-second exposure at 90 W. Exposure significantly inhibited cellular growth. The treatment increased the effectiveness of most tested antibiotics, with exposed bacteria showing new or improved sensitivity. Gas chromatography analysis showed an increase in unsaturated fatty acids, and the bacteria became more sensitive to sodium deoxycholate and released more extracellular proteins, indicating membrane weakening.
Xiong J, He C, Li C, Tan G, Li J, Yu Z, Hu Z, Chen F. · 2013
Researchers exposed rats to a 0.5 mT 50 Hz extremely low-frequency magnetic field for 14 and 28 days and then used Golgi staining to examine dendritic spines in the superficial layers of the medial entorhinal cortex. Exposure reduced spine density in stellate neurons and the basal dendrites of pyramidal neurons at both time points, largely due to loss of thin and branched spines. Reduced spine density in the apical dendrites of pyramidal neurons was only observed at 28 days, reflecting distinct vulnerability of spines in the apical and basal dendrites.
Xiong J, He C, Li C, Tan G, Li J, Yu Z, Hu Z, Chen F. · 2013
Researchers exposed rats to magnetic fields from power lines for up to 28 days and found significant damage to brain cell connections in areas controlling memory and navigation. These structural changes to nerve cells could explain cognitive problems linked to EMF exposure.
Sefidbakht Y et al. · 2013
Researchers used a rectangular waveguide system to expose luciferase to 940 MHz electromagnetic fields. Exposed luciferase showed significantly higher activity and smaller hydrodynamic radii than unexposed samples. Exposed samples also had less tendency to form aggregates. Dielectric measurements indicated changes related to disaggregation potency.
Kumar S et al. · 2013
Researchers studied the effect of a 50 Hz, 17.96 μT magnetic field on tonic pain behavior and brain neurotransmitters in rats with complete thoracic spinal cord injury at week 8. Adult male Wistar rats were divided into Sham, SCI, and SCI+MF groups, with pain behavior assessed using block pain rating, session pain rating, time spent in pain categories, and flinch counts. Pain ratings and flinch counts were significantly lower in SCI rats than in Sham rats, but these measures were comparable between the SCI+MF and Sham groups. Serotonin was lower in the cortex, remaining forebrain areas, and brainstem, while GABA and norepinephrine were higher in the brainstem of SCI rats, but these levels were comparable to Sham in the SCI+MF group.
Kumar S et al. · 2013
Researchers exposed rats with spinal cord injuries to extremely low-frequency magnetic fields (50 Hz, similar to power lines) for 2 hours daily over 8 weeks. They found that this exposure helped restore normal pain responses and brain chemistry that had been disrupted by the spinal injuries. The magnetic field treatment appeared to normalize levels of key brain chemicals like serotonin and GABA that control pain perception.
Thielens A, Vermeeren G, Kurup D, Joseph W, Martens L. · 2013
Compliance boundaries and allowed output powers were determined for the front, back, and side of antennas based on the root-mean-squared electric field, whole-body averaged SAR, and 10 g averaged SAR in the limbs and head and trunk. The study used ICNIRP basic restrictions and reference levels for both general public and occupational exposure. Antennas were designed for GSM900, GSM1800, HSPA, and LTE with output powers up to 300 W at individual frequencies. Boundaries were estimated using finite-difference time-domain simulations with the Virtual Family Male for three directions at 800, 900, 1800, and 2600 MHz.
Simon D et al. · 2013
Researchers exposed reconstructed epidermis models with and without melanocytes to 900 MHz GSM radiation at 2 mW/g for 6 hours. No changes were observed in epidermal architecture, epidermal markers, apoptotic cells, p53 induction, melanocyte location, dendricity, or melanin transfer after exposure. Loricrin and cytokeratin 14 decreased significantly at 6 hours, but all marker levels increased at 24 hours compared to 6 hours, alongside decreased 20S proteasome activity. The presence or absence of melanocytes did not affect the response of the reconstructed epidermis to exposure.
