Hao D, Yang L, Chen S, Tong J, Tian Y, Su B, Wu S, Zeng Y · 2013
Researchers exposed 32 trained Wistar rats to 916 MHz, 10w/m2 electromagnetic field for 6 hours a day, 5 days a week, over 10 weeks, and tested their spatial learning and memory in an eight-arm radial maze each weekend. During weeks 4–5, the exposed rats had longer completion times and higher error rates than the control group, but during weeks 1–3 and 6–9 the two groups were close to each other. The researchers concluded that the 916 MHz EMF influenced learning and memory in rats to some extent in a period during exposure, and that the rats can adapt to long-term EMF exposure.
Haghani M, Shabani M, Moazzami K. · 2013
Researchers exposed pregnant rats to 900-MHz mobile phone radiation for 6 hours daily throughout pregnancy and studied the brain development of their offspring. While the young rats showed no obvious behavioral problems, detailed electrical measurements revealed that specialized brain cells called Purkinje neurons (which help control movement and coordination) had altered electrical activity. This suggests that prenatal cell phone exposure can affect brain development at the cellular level, even when outward behavior appears normal.
Deshmukh PS et al. · 2013
Researchers exposed rats to extremely low-level 900 MHz microwave radiation (similar to cell phone frequencies) for 2 hours daily over 30 days. The exposed rats showed significant memory and learning problems, plus increased oxidative stress (cellular damage) in their blood. This matters because the radiation level was about 1,000 times lower than current safety limits, yet still caused measurable brain and cellular effects.
Deshmukh PS et al. · 2013
Researchers exposed rats to extremely low-level 900 MHz microwave radiation (similar to cell phone frequencies) for 2 hours daily over 30 days. The exposed rats showed significant cognitive impairment and increased oxidative stress (cellular damage from harmful molecules called free radicals) compared to unexposed control rats. This suggests that even very weak microwave radiation can affect brain function and cause cellular damage.
Aerts S et al. · 2013
Researchers introduced a new method for mapping outdoor exposure to base station radiation that combines surrogate modeling with sequential design. They reported that 50 measurement locations were enough to create a coarse street exposure map identifying high and low exposure regions, and 70 locations were enough to build an accurate predictive interpolation model of the electric field distribution.
Aboul Ezz HS, Khadrawy YA, Ahmed NA, Radwan NM, El Bakry MM · 2013
Researchers investigated the effect of electromagnetic radiation on concentrations of dopamine, norepinephrine, and serotonin in the hippocampus, hypothalamus, midbrain, and medulla oblongata of adult rats. Adult rats were exposed daily to electromagnetic radiation at 1800 MHz, with a specific absorption rate of 0.843 W/kg and power density of 0.02 mW/cm2, modulated at 217 Hz. Measurements were taken after 1, 2, and 4 months of daily exposure, and also after stopping exposure for 1 month following 4 months of daily exposure. The exposure resulted in significant changes in dopamine, norepinephrine, and serotonin in all four brain areas studied.
Aboul Ezz HS, Khadrawy YA, Ahmed NA, Radwan NM, El Bakry MM. · 2013
Researchers exposed rats to cell phone radiation (1800 MHz, similar to 2G networks) for up to 4 months and measured key brain chemicals called neurotransmitters that control mood, memory, and learning. The radiation significantly altered levels of dopamine, serotonin, and norepinephrine across four different brain regions. These chemical changes could explain why some people report memory problems, learning difficulties, and increased stress after heavy cell phone use.
Tkalec M, Stambuk A, Srut M, Malarić K, Klobučar GI. · 2013
Researchers exposed earthworms (Eisenia fetida) in vivo to 900 MHz radiofrequency electromagnetic fields at field levels of 10, 23, 41 and 120 V m(-1) for 2 hours using a Gigahertz Transversal Electromagnetic (GTEM) cell. All exposure treatments induced significant genotoxic effects in earthworm coelomocytes, as detected by the Comet assay. The results also indicated enhanced catalase and glutathione reductase activity, as well as lipid and protein oxidative damage. Antioxidant responses and the potential for damage to lipids, proteins, and DNA differed depending on field level, field modulation, and duration of exposure.
Jelodar G, Nazifi S, Akbari A. · 2013
Researchers exposed adult male Sprague–Dawley rats to 900 MHz radiofrequency waves for 45 days. RFW exposure decreased antioxidant enzyme activity and increased malondialdehyde levels in testis tissue. Vitamin C improved antioxidant enzyme activity and reduced malondialdehyde compared with RFW-only rats.
Estenberg J, Augustsson T. · 2013
Researchers developed a car-based measuring system to estimate outdoor radiofrequency field exposure across rural, urban, and city areas of Sweden. The median power density was 16 µW/m(2) in rural areas, 270 µW/m(2) in urban areas, and 2400 µW/m(2) in city areas. In urban and city areas, base stations for mobile phones were clearly the dominating sources of exposure.
Ntzouni MP et al. · 2013
Ntzouni MP et al. · 2013
Mice exposed to cell phone radiation (1.8 GHz) for 90 minutes daily developed memory problems that worsened over time. Memory impairments persisted two weeks after exposure ended but fully recovered after a month. The radiation level was below current safety limits.
Bodera P et al. · 2013
Researchers exposed rats to cell phone radiation at 1800 MHz (the same frequency used by GSM phones) for 15 minutes and measured changes in their blood's antioxidant capacity. They found that this brief exposure significantly reduced the blood's ability to neutralize harmful free radicals, both in healthy rats and those with inflammation. The study also tested interactions with tramadol (a pain medication) and found the radiation effects were amplified when combined with the drug.
Narayanan SN et al. · 2013
Researchers exposed male adolescent rats to radio-frequency electromagnetic radiation at 900 MHz from an active mobile phone, then tested their emotionality and locomotion. In the elevated plus maze test, exposed rats showed significantly reduced open-arm entries, time on open arms, and distance on open arms, along with decreased rearing and grooming frequency. Total distance travelled and total arm entries did not differ significantly between exposed and control rats.
Pelletier A et al. · 2013
Researchers examined the effects of chronic RF-EMF exposure (900 MHz, 1 V m(-1)) on the main functions involved in body energy homeostasis, including feeding behaviour, sleep, and thermoregulatory processes. Thirteen juvenile male Wistar rats were exposed to continuous RF-EMF for 5 weeks and compared with 11 non-exposed animals. The frequency of rapid eye movement sleep episodes was greater in the exposed group independently of ambient temperature, with increases of 42.1% at 24 °C and 31.6% at 31 °C. Exposure also increased daytime food intake, and the researchers concluded that RF-EMF exposure can induce energy-saving processes without strongly disturbing the overall sleep pattern.
Manta AK, Stravopodis DJ, Papassideri IS, Margaritis LH · 2013
Researchers exposed fruit flies to radiation from cordless phone base stations. The flies showed doubled levels of cell-damaging molecules within hours, even at very low radiation levels. This suggests common household wireless devices may cause cellular stress below current safety standards.
Pelletier A et al. · 2013
French researchers exposed young rats to cell phone radiation (900 MHz) for five weeks and found disrupted sleep patterns, increased daytime eating, and impaired blood vessel function affecting temperature control. These changes suggest chronic RF exposure interferes with basic biological processes controlling energy use.
Jelodar G, Akbari A, Nazifi S. · 2013
Researchers exposed adult male Sprague-Dawley rats to 900 MHz radiofrequency waves daily for 45 days and measured antioxidant enzymes and malondialdehyde in eye tissue. Radiofrequency wave exposure decreased glutathione peroxidase, superoxide dismutase, and catalase activity and increased malondialdehyde compared with controls. Vitamin C supplementation at 200 mg/kg per day improved antioxidant enzyme activity and reduced malondialdehyde compared with the test group.
Jelodar G, Akbari A, Nazifi S. · 2013
Researchers exposed rats to 900 MHz radiofrequency radiation (similar to cell phone frequencies) for 45 days and found it caused significant oxidative stress in their eyes, reducing protective antioxidant enzymes and increasing cellular damage markers. When rats were given vitamin C alongside the radiation exposure, the antioxidant damage was largely prevented. This suggests that radiofrequency radiation can harm eye tissues through oxidative stress, but antioxidants may provide some protection.
Cammaerts MC, Rachidi Z, Bellens F, De Doncker P · 2013
Researchers used the ant species Myrmica sabuleti to study how electromagnetic waves affect the insects' responses to pheromones and food collection. Workers' responses to trail, area-marking, and alarm pheromones were measured under normal conditions and then again while under the influence of electromagnetic waves. Under exposure, ants followed trails for only short distances, no longer arrived at marked areas, and no longer orientated themselves to a source of alarm pheromone. The number of ants collecting food increased only slightly and slowly, and after 180 hours of exposure their colonies deteriorated.
Moretti D et al. · 2013
Researchers developed a dedicated experimental setup for the simultaneous exposure of neuronal networks and monitoring of electrical activity. In this pilot study on 16 cultures, there was a 30% reversible decrease in firing rate and bursting rate during a 3-minute exposure. The researchers noted that additional experiments are needed to further characterize this effect.
Moretti D et al. · 2013
French researchers exposed lab-grown brain cell networks to cell phone radiation (GSM-1800) for 3 minutes and measured their electrical activity in real time. They found that the radiation caused a 30% decrease in the brain cells' firing rate and bursting patterns - essentially making the neurons less active. The effect was reversible, meaning the cells returned to normal activity after exposure ended.
Jiang B, Zong C, Zhao H, Ji Y, Tong J, Cao Y · 2013
Adult male ICR mice were pre-exposed to 900 MHz radiofrequency fields for 4 hours per day for 7 days, then given an acute whole-body dose of 3 Gy gamma radiation. The micronucleus assay was used to measure genotoxicity in immature erythrocytes in peripheral blood and bone marrow. Mice exposed to the radiofrequency fields alone showed micronucleus indices similar to unexposed controls, while mice given gamma radiation alone showed a significantly increased micronucleus frequency. Mice pre-exposed to the radiofrequency fields before gamma radiation showed a significant decrease in micronucleus indices compared to those given gamma radiation alone.
Tsybulin O et al. · 2013
Japanese quail embryos were exposed in ovo to GSM 900 MHz radiation for 38 hours or 158 hours with a 48-second on, 12-second off cycle at an average power density of 0.25 μW/cm(2) and a specific absorption rate of 3 μW/kg. The number of differentiated somites was assessed microscopically and DNA damage was assessed by an alkaline comet assay. After 38 hours the number of differentiated somites increased and DNA strand breaks decreased, while after 158 hours the number of differentiated somites decreased and DNA damage increased.
Mohammed HS, Fahmy HM, Radwah NM, Elsayed AA · 2013
Researchers exposed rats to 900 MHz radiofrequency radiation (similar to cell phone signals) for one hour daily over a month and measured their brain waves during sleep. The study found that REM sleep - the deep sleep phase crucial for memory and brain restoration - was significantly disrupted, with longer delays before entering REM sleep and changes to normal sleep cycles. This suggests that even non-thermal levels of RF radiation can interfere with essential sleep patterns.
