Research on EMF in educational settings - WiFi networks, Chromebooks, and interactive whiteboards.
## School and Classroom EMF Sources Modern classrooms have transformed into technology-rich environments where students and teachers spend 6-8 hours daily surrounded by multiple EMF-emitting devices. Today's educational settings typically feature WiFi networks broadcasting throughout the building, individual laptops or Chromebooks for each student, interactive whiteboards at the front of the room, and various Bluetooth-enabled devices for presentations and connectivity.
Guo et al. · 2023
Researchers exposed developing zebrafish to 50 Hz magnetic fields (the same frequency as power lines) and found that exposure reduced the fish's spontaneous movement behavior. The magnetic fields increased harmful reactive oxygen species and decreased production of syn2a, a protein crucial for nerve function and movement.
Unknown authors · 2023
Exposed MDA-MB-231 cells had higher viability, more live cells, and longer, denser filopodia than unexposed cells. ELF-MF also raised mitochondrial ROS levels and altered mitochondrial morphology in these cells. Proteomic analysis found 328 proteins changed in MDA-MB-231 cells and 242 in MCF-10A cells, with enrichment in focal adhesion and mitochondrion pathways. The exposure reduced adhesion and increased migration and invasion of MDA-MB-231 cells, while transcription factors linked to cellular reprogramming were upregulated in MDA-MB-231 and downregulated in MCF-10A.
Unknown authors · 2023
Unknown authors · 2023
Unknown authors · 2023
Researchers exposed fenugreek seeds to 900 MHz electromagnetic radiation (similar to cell phone frequencies) for varying durations up to 8 hours daily for a week. The study found that longer exposures significantly reduced seed germination, stunted plant growth, caused oxidative stress through lipid damage, and triggered DNA damage in plant cells.
Unknown authors · 2023
Researchers exposed mice continuously for 16 weeks to 2.45 GHz RF radiation from a household Wi-Fi router and a laboratory device, comparing them to a sham-exposed group. Mice underwent behavioral tests including open-field and Y-maze before and after exposure, and brains were examined for histopathology and DNA methylation. Exposure increased locomotor activity but did not produce significant structural or morphological brain changes. Global DNA methylation was lower in exposed mice than in sham mice.
Unknown authors · 2023
Researchers exposed mice to WiFi radiation (2.45 GHz) for 16 weeks using both household routers and laboratory equipment to simulate real-world conditions. The exposed mice showed increased movement activity and reduced DNA methylation in their brains, but no visible structural brain damage. This suggests WiFi radiation may cause subtle biological changes even without obvious tissue damage.
Unknown authors · 2023
Twenty-one healthy volunteers were exposed to a GSM signal at 900 MHz with specific absorption rates of 0.49 W/kg (10 g tissue) and 0.70 W/kg (1 g tissue). Delta and beta rhythms of resting EEG were not affected by the exposure. Theta brainwaves were significantly modulated during exposure, and this modulation depended on whether eyes were closed or open.
Unknown authors · 2023
Unknown authors · 2023
Researchers exposed 21 healthy volunteers to 900 MHz cell phone radiation and measured their brain waves using EEG. They found that theta brainwaves were significantly altered during exposure, with the effect depending on whether participants had their eyes open or closed. This is the first study to show that cell phone radiation can modify specific brain wave patterns in a way that depends on visual attention state.
Gurhan H, Bajtoš M, Barnes F · 2023
Researchers exposed human fibrosarcoma and fibroblast cells to weak RF magnetic fields in the 3–5 MHz range for four days. At 4.2 MHz, exposure significantly increased mitochondrial mass and oxidative stress in fibrosarcoma cells.
Unknown authors · 2023
Researchers analysed DNA methylation profiles of cervical cancer and neuroblastoma cell lines exposed to 900 MHz GSM-modulated radiofrequency electromagnetic fields. Radiofrequency exposure did not affect the DNA methylation of Alu elements in any of the cell lines analysed. It influenced DNA methylation of LINE-1 and ribosomal repeats in terms of average profiles and organisation of methylated and unmethylated CpG sites, in different ways in each of the three cell lines studied.
Unknown authors · 2023
Fifty-six rats weighing 200–250 g were divided into healthy and diabetic groups, each with sham and radiofrequency radiation exposure at 900, 1800, and 2100 MHz. Over a month, each group spent two hours per day in a Plexiglas carousel, with experimental groups exposed to radiofrequency radiation and sham groups not exposed. Researchers performed three-point bending tests and radiological evaluations on the right tibia bones and measured CAT, GSH, MDA, and IMA in skeletal muscle tissue. Significant differences were found in biomechanical properties, radiological evaluations, and muscle tissue measurements between groups (p < .05). Average whole-body SAR values were 0.026 W/kg for GSM 900 MHz, 0.164 W/kg for 1800 MHz, and 0.173 W/kg for 2100 MHz.
Saka VP, Chitra V, Narayanasamy D · 2023
Researchers exposed primary cortical neurons from neonatal rats to electromagnetic radiation from a mobile phone at 2100 MHz and 1.6 W/kg SAR for two hours. The study assessed the induction of apoptosis through modulation of pro- and anti-apoptotic genes via a mitochondrial pathway. Pyrazole derivatives reduced apoptosis by lowering reactive oxygen species and modulating apoptotic gene levels. The compounds showed antioxidative and anti-apoptotic properties.
Unknown authors · 2023
Exposure significantly increased cardiac protein expression of mitochondrial Complex I, II, III, and IV subunits, while Complex V expression remained stable. Mitochondrial respiratory capacity was modified in exposed mice. Oxidative stress markers and antioxidant enzyme SOD2 were unchanged, and no structural or functional heart abnormalities were found.
Unknown authors · 2023
Human keratinocytes were exposed to 900 MHz RF-EMF for 1 hour at a low dose rate (SAR < 10 mW/kg) using a custom system that maintained 37°C, 5% CO2, and 95% humidity. Whole genome bisulfite sequencing was performed directly following exposure to examine immediate changes in DNA methylation patterns and identify early differentially methylated genes. Correlating gene expression with methylation data identified six common targets that were both differentially methylated and differentially expressed, suggesting a potential epigenetic role in the cellular response and that these targets may serve as biomarkers for immediate RF-EMF response.
Saka VP, Chitra V, Narayanasamy D · 2023
Researchers exposed newborn rat brain cells to 2100 MHz cell phone radiation for 2 hours and found it triggered cell death through oxidative stress and mitochondrial damage. However, compounds called pyrazole derivatives protected the brain cells by reducing harmful reactive oxygen species and preventing programmed cell death.
Savchenko L et al. · 2023
Researchers exposed mice to 915 MHz electromagnetic fields (similar to cell phone frequencies) for 28 days and examined heart muscle effects. They found changes in cellular energy production systems within heart mitochondria, but no structural heart damage or oxidative stress markers. The study suggests EMF exposure can alter how heart cells generate energy, though the health implications remain unclear.
Unknown authors · 2023
Researchers exposed pregnant rats to 5G EMF at 3500 MHz continuous wave with a whole-body SAR of 0.07 W/kg for 22 hours per day from gestational day 8 to postnatal day 21. Both male and female pups showed delayed incisor eruption by one day in the exposed group compared to sham controls. In adolescent open-field testing, exposed females exhibited 70% fewer stereotyped movements while exposed males exhibited 50% more stereotyped movements than sham-exposed rats.
Franczak A et al. · 2023
Researchers exposed HeLa, ES-2, and DU-145 cancer cells to 50 Hz ELF-EMF at 1.3 mT for 15 and 30 minutes. The exposure increased reactive oxygen species levels in the cells. ES-2 cells showed upregulation of XRCC5 and higher levels of TNF-α, RAD51, APE1, XRCC1, and NSUN2, while DU-145 cells had reduced BCL-2, HSP90, RAD51, and TNF-α and increased VIM and METTL3.
Unknown authors · 2023
The study used sixty male Sprague-Dawley rats divided into six groups with different ELF-EMF exposure durations. Sperm count and motility were significantly lower in rats exposed for 1 hour per day for 52 days, 4 hours per day for 52 days, and 4 hours per day for 5 days compared with sham-exposed rats. Serum testosterone decreased significantly in rats exposed for 4 hours per day for 5 days. The volume of seminiferous tubules, their epithelium, and interstitial tissue decreased significantly after 4 hours per day for 5 days of exposure. Tubule length was reduced by 18% in the same exposure group.
Kilic A, Ustunova S, Bulut H, Meral I · 2023
Researchers exposed male and female Wistar albino offspring to 900 MHz EMF for one hour per day during prenatal (23 days) and/or postnatal (40 days) periods and collected brain and kidney tissues at puberty. In all exposed groups, total oxidant status, IL-2, IL-6, and TNF-α rose while total antioxidant status fell in both sexes' brain and kidney tissues. Renin-angiotensin system components including angiotensinogen, renin, AT1, AT2, and MAS1-like receptor expression were also elevated in all exposed groups compared with controls.
Kilic A, Ustunova S, Bulut H, Meral I · 2023
Turkish researchers exposed pregnant rats and their offspring to 900 MHz cell phone radiation (the frequency used by GSM networks) for one hour daily. They found significant increases in inflammation, oxidative stress, and activation of the renin-angiotensin system in both brain and kidney tissues of the young rats. The effects occurred whether exposure happened during pregnancy, after birth, or both periods.
Wydorski PJ et al. · 2023
Researchers collected porcine endometrial slices during the peri-implantation period and exposed them to 50 Hz ELF-EMF for 2 hours in vitro. They measured DNA methylation in the promoter regions of EGR2, HSD17B2, ID2, IL1RAP, MRAP2, NOS3, PTGER4, SERPINE1, VDR and ZFP57 using qMS-PCR. Exposure increased methylation of EGR2, ID2, and PTGER4, decreased methylation of IL1RAP and NOS3, and did not change methylation of HSD17B2, MRAP2, SERPINE1, VDR, and ZFP57.
Unknown authors · 2023
Zebra finches trained in a four-arm maze to orient using the magnetic field became disoriented when tested in low-level (~10 nT) Larmor-frequency RF fields. When the same birds were trained under the RF field, they could orient, showing the field altered but did not remove magnetic input. Higher-intensity Larmor-frequency RF fields dramatically changed the compass response, while broadband RF fields during training or testing erased magnetic compass information.