EMF Research Studies

Comparison of effects of 2.4 GHz Wi-Fi and mobile phone exposure on human placenta and cord blood

Bektas H, Dasdag S, Bektas MS · 2020

Trace elements homeostasis in brain exposed to 900 MHz RFW emitted from a BTS-antenna model and the protective role of vitamin E

Azimzadeh M, Jelodar G · 2020

The study examined the effects of 900 MHz RFW on brain iron, copper, zinc, and manganese concentrations and the protective role of vitamin E. Twenty adult male Sprague-Dawley rats were divided into four groups: control, vitamin E only, vitamin E plus RFW exposure, and RFW exposure only. The rats were exposed to RFW for 30 consecutive days at 4 hours per day while freely moving in the cage. Brain tissue levels of the elements were measured on the last day using atomic absorption spectrophotometry. Exposure significantly increased iron, copper, manganese, and the copper-to-zinc ratio while decreasing zinc, and vitamin E pre-treatment improved iron, copper, manganese, and the ratio but not zinc.

Azimzadeh M, Jelodar G

Unknown authors · 2020

The radio-protective effect of rosmarinic acid against mobile phone and Wi-Fi radiation-induced oxidative stress in the brains of rats

Asl JF, Goudarzi M, Shoghi H · 2020

Risk to pollinators from anthropogenic electro-magnetic radiation (EMR): Evidence and knowledge gaps

Vanbergen AJ et al. · 2019

The authors assessed whether artificial light at night and radiofrequency electromagnetic radiation from wireless technologies and power lines threaten pollinators. They found that knowledge of the risk is inconclusive, unresolved, or only partly established because of a lack of high-quality studies. Some studies show artificial light at night can alter pollinator communities, pollination, and fruit set. Laboratory experiments show honey bees and other invertebrates can detect electromagnetic radiation, but do not show it affects insect behavior in ecosystems. Robust evidence of radiofrequency radiation impacts on pollinator abundance or diversity is limited to a single study with mixed results.

The effect of Wi-Fi electromagnetic waves on neuronal response properties in rat barrel cortex

The effect of Wi-Fi electromagnetic waves on neuronal response properties in rat barrel cortexSistani S et al. · 2019

Researchers exposed 29 male Wistar rats to Wi-Fi radiation for 1 hour and recorded neuronal responses in the barrel cortex. Wi-Fi radiation decreased the condition test ratio for ON responses. Spontaneous activity and ON and OFF responses were not significantly changed. The researchers concluded that Wi-Fi radiation could modulate integrative responses to natural stimuli in barrel cortex.

Evaluation of Wi-Fi Radiation Effects on Antibiotic Susceptibility, Metabolic Activity and Biofilm Formation by Escherichia Coli 0157H7, Staphylococcus Aureus and Staphylococcus Epidermis

Said-Salman IH, Jebali FA, Yusef HH, Mustafa ME · 2019

A Wi-Fi router was used as a source of microwaves and bacterial cells were exposed continuously for 24 and 48 hours. Antibiotic susceptibility was tested by disc diffusion on Müller Hinton agar, motility of Escherichia coli O157H7 was assessed on motility agar, and metabolic activity and biofilm formation were measured with MTT assay and crystal violet quantification. Exposure altered motility and antibiotic susceptibility of Escherichia coli O157H7, did not change antibiotic susceptibility of Staphylococcus aureus or Staphylococcus epidermis, and increased metabolic activity and biofilm formation in Escherichia coli O157H7, Staphylococcus aureus and Staphylococcus epidermis.

(2019): Higher exposure to cell tower RFR was associated with delayed fine and gross motor skills, spatial working memory, and attention among adolescents compared to students exposed to lower levels of cell tower RFR

Meo et al · 2019

Human exposure to radio-frequency radiation has grown more than 100,000-fold since World War II. In 2011, IARC classified RFR as a possible human carcinogen. Three large-scale rodent studies found significantly increased rates of Schwannomas, malignant gliomas, and chromosomal DNA damage from RFR exposures mimicking lifetime human exposures. Compared with an adult male, a cell phone held against a child's head exposes deeper brain structures to greater radiation doses per unit volume, and the child's skull bone marrow absorbs a roughly 10-fold higher local dose. Recent reports suggest that men who keep cell phones in their trouser pockets have significantly lower sperm counts and significantly impaired sperm motility and morphology, including mitochondrial DNA damage.

(2019) Social media use and adolescent mental health: Findings from the UK Millennium Cohort Study

Kelly Y et al. · 2019

Researchers analyzed data from 10,904 14-year-olds in the UK Millennium Cohort Study using multivariate regression and path models. The association between social media use and depressive symptoms was larger for girls than for boys. Compared with 1–3 h of daily use, 3 to <5 h was linked to a 26% increase in scores for girls and 21% for boys, while ≥5 h was linked to a 50% increase for girls and 35% for boys. Greater social media use related to online harassment, poor sleep, low self-esteem and poor body image, which in turn related to higher depressive symptom scores.

Problematic cell phone use, depression, anxiety, and self-regulation: Evidence from a three year longitudinal study from adolescence to emerging adulthood. Computers in Human Behavior

Coyne SM, Stockdale L, Summers K · 2019

NASA's SMAP mission conducted a field experiment over two 40-km agricultural domains in Iowa and Manitoba in summer 2016 with airborne PALS flights and intensive ground measurements. The experiment had two observation periods capturing early-season low vegetation and later-season high vegetation conditions. PALS brightness temperature measurements compared to SMAP showed an RMSD of 2.8 K for vertical polarization and 4.0 K for horizontal polarization. Using seasonally variable parameters allowed satisfactory soil moisture retrieval accuracy. The results suggested that rapidly growing vegetation and early-season surface condition changes not captured by the SMAP algorithm caused SMAP retrieval errors.

Prolonged mobile phone use is associated with depressive symptoms in Chinese adolescents

Liu J, Liu C, Wu T, Liu BP, Jia CX, Liu X · 2019

Researchers surveyed 11,831 adolescent students in Shandong, China in 2015 using a self-administered questionnaire to measure mobile phone use duration and depressive symptoms. After adjusting for covariates, weekday use of two or more hours per day (OR = 1.78, 95%CI = 1.48-2.15) and weekend use of five or more hours per day (OR = 1.67, 95%CI = 1.41-1.98) were each associated with increased risk of depressive symptoms measured by CES-D. The association between mobile phone use and depression was partially mediated by short sleep duration or insomnia. Similar associations were observed when depression was assessed using the Youth Self-Report scale.

Night-time screen-based media device use and adolescents' sleep and health-related quality of life

Mireku MO et al. · 2019

Researchers analysed baseline data from 6616 adolescents aged 11 to 12 years in the SCAMP cohort in London. Over two-thirds (71.5%) of adolescents reported using at least one screen-based media device at night, and about a third (32.2%) reported using mobile phones at night in darkness. Night-time mobile phone and television use were associated with higher odds of insufficient sleep on weekdays, with stronger associations for mobile phone use in darkness. Mobile phone use in a dark room was also associated with lower health-related quality of life scores.

DOI: 10.1016/j.jadohealth.2019.06.001

Lapierre MA et al. · 2019

Long-Term Symptoms of Mobile Phone Use on Mobile Phone Addiction and Depression Among Korean Adolescents

Park SY, Yang S, Shin CS, Jang H, Park SY · 2019

At each of the three time points, Korean girls used mobile phones more frequently and had higher risk of mobile phone addiction and depressive symptoms than boys. Longitudinal relationships among phone use, addiction, and depression changed over time, but their strengths did not differ by gender.

(2019) Real-world cell phone radiofrequency electromagnetic field exposures

Wall et al · 2019

Researchers measured RF EMF exposure from cell phones on four major US networks under strong and weak signal conditions at distances up to 48 cm. Exposures were up to four orders of magnitude higher under weak signal conditions than under strong signal conditions. Under weak signal conditions, power density reductions of up to 90% occurred at 16 cm compared to the 4 cm near-ear exposure. Bluetooth headset exposures were 10 to 400 times lower than direct near-ear exposures from the connected phones.

(2020) A meta-analysis of in vitro exposures to weak radiofrequency radiation exposure from mobile phones (1990–2015)

Panagopoulos (2019) Comparing DNA damage induced by mobile telephony and other types of man-made electromagnetic fields. Mutation Res. http://bit.ly/2HACI1O Halgamuge et al et al. · 2019

Researchers analyzed data from 300 peer-reviewed publications (1990-2015) covering 1127 experimental observations in cell-based in vitro models. In human cell experiments, 45.3% showed changes while 54.7% showed no changes (p = 0.001). Further analysis revealed that significant effects were restricted to faster-growing, less differentiated cell types such as human spermatozoa and human epithelial cells, while mature differentiated cells like glia, glioblastoma, and blood lymphocytes showed no statistically significant differences.

(2019) Towards predicting intracellular radiofrequency radiation effects

Nielsen et al · 2019

J Biomed Phys Eng

Mortazavi et al · 2019

Researchers studied the bioconjugation efficiency of carbon-encapsulated iron nanoparticles with diameters of 20–40 nm that were functionalized by plasma for virus detection applications. The nanoparticles were functionalized with amino groups using radio frequency wave-excited inductively-coupled argon and ammonia gas plasmas, with amino group population varied by changing plasma operating conditions. Bioconjugation efficiency was tested using a biotin–avidin system where amino-modified nanoparticles were immobilized with biotin and then analyzed for avidin interaction using absorption and fluorescence spectroscopy. The plasma-functionalized nanoparticles showed highly efficient bioconjugation properties. The results suggest feasibility for a highly sensitive virus capturing system.

Myrciaria dubia "camu camu" flour as a magnetoprotector in male mouse infertility

Torres L, Guevara B, Cruz V, Valdivia M · 2019

Researchers evaluated the effect of camu camu flour on oxidative damage from ELF-MF at 610 μT by measuring mitochondrial oxidoreductase enzyme activity over a full sperm cycle in mice. The magnetic field significantly decreased sperm quality. Mice given camu camu flour at 50 and 75 mg/kg body mass during exposure showed significant recovery in sperm viability, plasma membrane integrity, mitochondrial activity, and epididymal sperm index.

Exposure to Electromagnetic Fields of High Voltage Overhead Power Lines and Female Infertility

Esmailzadeh S et al. · 2019

Researchers conducted a case-control study of 462 women with infertility and 471 controls between 2014 and 2016. Distance from high voltage power lines (240–400 kV) to each residence was measured using GIS and Google Earth. Women living within 500 meters had an odds ratio of 4.14 (95% CI 2.61 to 6.57) for infertility compared with those living beyond 1000 meters, and the adjusted odds ratio was 4.44 (95% CI 2.77 to 7.11).

Effects of uninterrupted sinusoidal LF- EMF stimulation on LTP induced by different combinations of TBS/HFS at the Schaffer collateral-CA1 of synapses

Zheng Y, Ma XX, Dong L, Ma W, Cheng JH · 2019

Effects of exposure to extremely low frequency electromagnetic fields on hippocampal long-term potentiation in hippocampal CA1 region

Zheng Y, Cheng J, Dong L, Ma X, Kong Q · 2019

Isoflurane preconditioning ameliorates electromagnetic pulse-induced neural damage by shifting microglia polarization toward anti-inflammatory phenotype via upregulation of SOCS1

Zhang X, Lv M, Zhu X, Tian L, Li J, Shao Y, Gao C, Sun X · 2019

Researchers exposed rats to electromagnetic pulse with or without isoflurane preconditioning and analyzed brain samples for microglia markers and inflammatory mediators. They also used SOCS1 siRNA in cultured microglia cells to test SOCS1's role. Electromagnetic pulse exposure made microglia pro-inflammatory, increased inflammatory cytokines and chemokines, activated the TLR4 pathway, and caused neuronal death. Isoflurane preconditioning reversed these changes and switched microglia to an anti-inflammatory phenotype. Blocking SOCS1 eliminated the protective effect of isoflurane preconditioning.

Transcranial Magneto- Acoustic Stimulation Improves Neuroplasticity in Hippocampus of Parkinson's Disease Model Mice

Wang Y, Feng L, Liu S, Zhou X, Yin T, Liu Z, Yang Z · 2019

Effects of low-frequency repetitive transcranial magnetic stimulation on depression- and anxiety-like behaviors in epileptic rats

Unknown authors · 2019

Forty-eight adult rats were randomly assigned to four groups: Control, PTZ, PTZ-rTMS, and PTZ-Sham. The PTZ groups received pentylenetetrazol (35 mg/kg/d) once daily for 15 days, while the PTZ-rTMS and PTZ-Sham groups received low-frequency rTMS or sham stimulation over two weeks. Behavioral tests including the open-field test, elevated plus-maze test, and forced swimming test were performed before the experiment and on days 8 and 15. Two weeks of low-frequency rTMS did not reduce seizure severity but significantly reduced immobility time in the forced swimming test and attenuated declines in open-field and elevated plus-maze measures.