Occupational extremely low-frequency magnetic field exposure and selected cancer outcomes in a prospective Dutch cohort
Research
RF Safe Research Library
Jan 1, 2014
This prospective Dutch cohort (120,852 participants; 17.3 years follow-up) examined occupational ELF magnetic field exposure and incidence of several cancers. No associations were reported for lung, breast, or brain cancer across multiple exposure metrics. In men, high occupational exposure was associated with…
Neurodegenerative disease and magnetic field exposure in UK electricity supply workers
Research
RF Safe Research Library
Jan 1, 2014
This cohort study examined mortality from Alzheimer’s disease, motor neurone disease, and Parkinson’s disease among 73,051 UK electricity supply workers from 1973 to 2010. Occupational magnetic-field exposure was assessed using detailed calculations and analyzed using Poisson regression across lifetime, distant…
Extremely low-frequency magnetic fields of transformers and possible biological and health effects
Research
RF Safe Research Library
Jan 1, 2014
This study measured leakage extremely low-frequency (ELF) magnetic fields around a transformer located on the bottom floor of a three-floor apartment building in Istanbul. The measurements were evaluated against international exposure standards, and the authors report exposures higher than the IARC threshold magnetic…
Occupational exposure to electromagnetic fields of uninterruptible power supply industry workers
Research
RF Safe Research Library
Jan 1, 2014
This workplace exposure assessment reports extensive spot measurements of ELF electric and magnetic fields in a UPS factory across test areas, production lines, and power substations. The highest fields were observed in test areas (up to 992.0 V/m and 215.6 µT). The authors state that measured levels were below…
Risk of neuroblastoma, maternal characteristics and perinatal exposures: the SETIL study
Research
RF Safe Research Library
Jan 1, 2014
This population-based Italian case-control study (153 neuroblastoma cases; 1044 controls) evaluated maternal characteristics and perinatal exposures, including measured ELF-MF home exposure during pregnancy. The authors report no association between ELF-MF exposure and neuroblastoma risk. Increased risks were…
[Modulating effect of weak combined magnetic fields on duration of mealworm beetle Tenebrio molitor metamorphosis stage].
Research
RF Safe Research Library
Jan 1, 2014
This animal study reports that combined static (42 μT) and very weak alternating (250 nT) magnetic fields can modulate the duration of metamorphosis in Tenebrio molitor pupae depending on the alternating-field frequency. A shorter pupal stage was reported at 4.4 Hz, an inhibiting effect at 32.2 Hz, and no noticeable…
[The effect of weak low-frequency magnetic fields on the intracellular calcium-dependent proteinases of fish].
Research
RF Safe Research Library
Jan 1, 2013
This animal study examined in vivo and in vitro effects of weak, low-frequency magnetic fields described as having resonance parameters for calcium ions. The authors report a considerable decrease in activity of calcium-dependent proteinases (calpains) in fish skeletal muscle and brain following exposure. The…
Influence of pulsed magnetic field on soybean (Glycine max L.) seed germination, seedling growth and soil microbial population.
Research
RF Safe Research Library
Jan 1, 2013
This laboratory study examined pulsed magnetic field (PMF) pretreatment of soybean seeds (1500 nT) at 0.1–100 Hz for 5 hours/day over 20 days. The abstract reports increased germination rates for all PMF treatments, with 10 and 100 Hz showing the strongest responses, and improvements in several seedling growth and…
[Modulation of Ca(2+)-dependent proteinase activity in invertebrates and fish under the action of weak low-frequency magnetic fields].
Research
RF Safe Research Library
Jan 1, 2013
This study examined whether weak low-frequency magnetic fields affect Ca2+-dependent proteinases (calpains) in fish and invertebrates using in vivo and in vitro experiments. The authors report a significant decrease in calpain activity in animals exposed to a field tuned to Ca2+ parametric resonance, and substantial…
P-selectin expression in a colon tumor model exposed by sinusoidal electromagnetic fields.
Research
RF Safe Research Library
Jan 1, 2013
This animal study evaluated whether sinusoidal magnetic field exposure alters P-selectin expression in a rat colon tumor model. Rats exposed to 50 Hz, 5 mT for 6 h/day for 8 months showed no statistically significant change in P-selectin expression by immunohistochemistry. The authors indicate that further in vitro…
Hematological and toxicogenomic effects of ferromagnetic screening of natural electromagnetic fields.
Research
RF Safe Research Library
Jan 1, 2011
This rat study tracked hematological and toxicogenomic aftereffects over 45 days following 2 days of ferromagnetic screening of natural electromagnetic fields. The authors report leukopenia at day 14 and increases in genomic instability markers (aneuploidy and polyploidy) in male leukocytes persisting after screening…
Effects of extremely low frequency magnetic field on oxidative balance in brain of rats.
Research
RF Safe Research Library
Jan 1, 2011
This animal study examined whether an extremely low frequency magnetic field (7 mT, 40 Hz) used in magnetotherapy alters oxidative balance in rat brain after 10 days of exposure. The 30 min/day exposure condition was associated with increased lipid peroxidation, while the 60 min/day condition was associated with…
Transient and steady-state magnetic fields induce increased fluorodeoxyglucose uptake in the rat hindbrain.
Research
RF Safe Research Library
Jan 1, 2011
This animal PET study examined whether a weak 60-Hz magnetic field alters brain glucose utilization in rats. The abstract reports increased FDG uptake in hindbrain voxels when a 2.5-G field was oriented orthogonally to the sagittal plane, but not when field direction varied randomly. Distinct activation effects were…
Effects of low frequency electromagnetic fields on the chondrogenic differentiation of human mesenchymal stem cells.
Research
RF Safe Research Library
Jan 1, 2011
This in vitro study examined whether extremely low-frequency magnetic fields affect chondrogenic differentiation of human mesenchymal stem cells in pellet culture. Cells exposed for 3 weeks to a homogeneous sinusoidal 5 mT magnetic field showed increased collagen type II expression (significant at passage 6) and…
The influence of low-frequency magnetic field on plasma antioxidant capacity and heart rate.
Research
RF Safe Research Library
Jan 1, 2009
This animal study exposed Sprague-Dawley rats to a 40 Hz, 7 mT time-variable magnetic field and measured ECG heart rate and plasma antioxidant capacity before and after exposure, including after 14 days. The authors report a significant decrease in heart rate after 14 days. Antioxidant defence findings were mixed,…
[Effects of 50 Hz sinusoidal magnetic field on Ca2+ release channel ryanodine receptor of sarcoplasmic reticulum vesicles].
Research
RF Safe Research Library
Jan 1, 2009
This in vitro study examined whether a 50 Hz sinusoidal magnetic field affects the sarcoplasmic reticulum calcium release channel RyR1. A 0.4 mT exposure for 30 minutes increased SR Ca2+ release rate and [(3)H]-ryanodine binding under NADH/NAD+ conditions. The authors also report increased NADH oxidation and…
[A preliminary study on role of acid sphingomyelinase in receptor clustering induced by 50-Hz magnetic fields].
Research
RF Safe Research Library
Jan 1, 2009
This in vitro study exposed human amnion (FL) cells to a 50-Hz sinusoidal magnetic field (0.4 mT) for 15 minutes and assessed epidermal growth factor receptor (EGFR) clustering. The authors report that magnetic field exposure induced EGFR clustering, and that this effect was blocked by imipramine, an acid…
Exposure to an additional alternating magnetic field affects comb building by worker hornets.
Research
RF Safe Research Library
Jan 1, 2007
This animal study reports that exposing worker oriental hornets in an artificial breeding box to an additional 50 Hz magnetic field (50–70 mGauss) altered comb construction compared with controls under only the terrestrial magnetic field. The abstract describes fewer cells and eggs, more deformed cell geometry, and…
[The impact of treatment by extremely low frequency magnetic fields on the electropotentials in an oral cavity and some chemical elements content in saliva].
Research
RF Safe Research Library
Jan 1, 2007
This study reports measurements in 25 dental patients treated with the Viofor JPS system using extremely low frequency magnetic fields. Following a series of treatments, oral cavity electropotentials decreased and saliva pH increased. Copper levels in non-stimulated saliva decreased, while other measured elements…
[Measurements of professional exposure to ELF fields in some production areas within the territory of Regione Campania and comparison with the action values according to 2004/40/CE Directive].
Research
RF Safe Research Library
Jan 1, 2007
This occupational exposure assessment measured ELF magnetic fields in 400 workers across 80 work areas in several production sectors in Regione Campania. Measurements were taken continuously over two shifts and processed into RMS magnetic-field values. The authors report no exceedance of the EU 2004/40/CE action…
[ELF-MF occupational exposure: repeated measures on workers].
Research
RF Safe Research Library
Jan 1, 2007
This occupational exposure assessment used personal dosimeters to estimate ELF magnetic field exposure in 543 workers across 9 occupational settings in Emilia-Romagna. Median time-weighted average exposure was 0.14 microT, with tile production showing the highest setting-level TWA. Repeat measurements after 6–9…
[Evaluation of the genotoxicity of the extremely low frequency-magnetic fields (ELF-MF) in workers exposed for professional reasons].
Research
RF Safe Research Library
Jan 1, 2007
This occupational study assessed whether extremely low frequency magnetic fields (ELF-MF) are associated with genotoxicity using cytogenetic assays in 109 workers. Comparisons across exposure strata, including a highest-exposed subgroup (TWA > 1 microT), found no significant differences in CA, SCE, or MN outcomes.…
Biophoton emission of MDCK cell with hydrogen peroxide and 60 Hz AC magnetic field.
Research
RF Safe Research Library
Jan 1, 2007
This in vitro study measured biophoton/chemiluminescence emission from MDCK cells after inducing reactive oxygen species with hydrogen peroxide. The authors report that photon emission increased with hydrogen peroxide dose and that photomultiplier tube measurements agreed with fluorescence microscopy observations.…
The influence of combined magnetic field on the fusion of plant protoplasts.
Research
RF Safe Research Library
Jan 1, 2007
This laboratory study examined whether a weak alternating magnetic field tuned to the cyclotron frequency of Ca2+ and K+ ions influences fusion of tobacco and soya protoplasts. The abstract reports a 2–3× increase in protoplast fusion frequency under exposure. It also reports involvement of calcium ions in induction…
20 kHz Magnetic Field Emission of Induction Cooking Heaters
Research
RF Safe Research Library
Jan 1, 2004
This exposure assessment measured 20 kHz magnetic field leakage from induction cooking heaters across four models and compared results with ICNIRP general public limits. The maximum reported magnetic flux density was 16 µT at a specified measurement point using two S-type pans. Field leakage depended on pan size and…