Archive

757 posts

Showing results for: magnetic field

Residential exposure to extremely low-frequency magnetic fields and risk of childhood leukaemia, CNS tumour and lymphoma in Denmark

Research RF Safe Research Library Nov 3, 2015

This Danish case-control study assessed residential extremely low-frequency magnetic fields (ELF-MF) calculated from 50 6400 kV facilities and risk of childhood leukaemia, CNS tumour, and malignant lymphoma from 1968 62003. For 1987 62003, the RR for the combined outcome at 0.4 bcT vs

Environmental Radiofrequency Electromagnetic Fields Exposure at Home, Mobile and Cordless Phone Use, and Sleep Problems in 7-Year-Old Children

Research RF Safe Research Library Oct 28, 2015

This cohort study of 2,361 seven-year-old children assessed modeled residential/school RF-EMF from base stations, reported indoor sources, and children’s mobile/cordless phone use in relation to parent-reported sleep quality. Most sleep subscales were not associated with base-station RF-EMF, though sleep duration…

Effect of exposure to extremely low frequency magnetic fields on melatonin levels in calves is seasonally dependent

Research RF Safe Research Library Sep 18, 2015

This animal study measured salivary melatonin in 1–2 month old calves exposed to 50 Hz extremely low frequency magnetic fields in the hundreds of nT range. The authors report a season-dependent response: melatonin decreased with exposure in winter but increased in summer. They suggest future studies should consider…

Effects of extremely low-frequency electromagnetic fields (ELF-EMF) exposure on B6C3F1 mice

Research RF Safe Research Library May 5, 2015

This long-term animal study exposed mice to a 50 Hz magnetic field (500 mG) prenatally and then through 15.5 months of life to assess tumor-related outcomes and fertility-related measures. Exposed mice had lower body weights and showed no increase in liver or lung tumor incidence. However, exposed female mice had a…

Exposure to 900 MHz electromagnetic fields activates the mkp-1/ERK pathway and causes blood-brain barrier damage and cognitive impairment in rats

Research RF Safe Research Library Mar 19, 2015

This animal study exposed 108 male Sprague-Dawley rats to 900 MHz EMF (1 mW/cm2) or sham for 14 or 28 days (3 h/day). The authors report that 28-day exposure was associated with impaired spatial memory, BBB permeability damage, and ultrastructural changes in hippocampus and cortex. They also report increased mkp-1…

2015:19 Recent Research on EMF and Health Risk - Tenth report from SSM’s Scientific Council on Electromagnetic Fields, 2015

Research RF Safe Research Library Mar 1, 2015

This Swedish Radiation Safety Authority (SSM) Scientific Council report provides an annual overview of the previous year’s research on electromagnetic fields (EMF) to support the Authority’s risk assessment and policy work. It updates key topics including ELF magnetic fields and childhood leukaemia, mobile phones,…

Memory performance, wireless communication and exposure to radiofrequency electromagnetic fields: A prospective cohort study in adolescents

Research RF Safe Research Library Jan 1, 2015

This prospective cohort study followed 439 adolescents for one year to assess whether wireless device use and estimated RF-EMF dose were associated with changes in memory performance. Higher cumulative mobile phone call duration and higher modeled RF-EMF brain and whole-body dose were associated with decreases in…

Influence of electromagnetic field (1800 MHz) on lipid peroxidation in brain, blood, liver and kidney in rats

Research RF Safe Research Library Jan 1, 2015

This animal study evaluated repeated 1800 MHz EMF exposure (5 × 15 minutes) on lipid peroxidation (MDA) in Wistar rats, including healthy animals and those with CFA-induced inflammation, with and without tramadol. The authors report slightly elevated MDA in blood, brain, and kidneys in EMF-exposed conditions,…

A cross-sectional study on oxidative stress in workers exposed to extremely low frequency electromagnetic fields

Research RF Safe Research Library Jan 1, 2015

This cross-sectional study compared oxidative stress and genotoxicity biomarkers between 310 ELF-EMF-exposed inspection workers and 300 logistical staff controls. The authors report no statistically significant differences in antioxidant-related measures (T-AOC, GPx, SOD) or MDA, and no significant differences in…

Low-Frequency Electromagnetic Field Exposure Enhances Extracellular Trap Formation by Human Neutrophils through the NADPH Pathway

Research RF Safe Research Library Jan 1, 2015

This in vitro/ex vivo study examined whether low-frequency electromagnetic field exposure affects human neutrophil extracellular trap (NET) formation. The authors report that LF EMF exposure enhanced NET formation and that this effect depended on the NADPH oxidase pathway and reactive oxygen species production. They…

The role of the location of personal exposimeters on the human body in their use for assessing exposure to the electromagnetic field in the radiofrequency range 98-2450 MHz and compliance analysis: evaluation by virtual measurements

Research RF Safe Research Library Jan 1, 2015

This study used numerical modeling with a human body model to evaluate how the placement of a single body-worn personal exposimeter affects RF electric-field measurements in the 98–2450 MHz range. Across 256 simulated exposure scenarios, the body substantially altered measured values compared with the unperturbed…

Validity of at home model predictions as a proxy for personal exposure to radiofrequency electromagnetic fields from mobile phone base stations

Research RF Safe Research Library Jan 1, 2015

This exposure-assessment study compared modeled at-home RF-EMF from mobile phone base stations (NISMap) with 24-hour personal measurements in 93 Dutch participants. Correlations were low to moderate, with better agreement for time spent at home than for the full 24-hour period. While modeled estimates could rank…

Occupational exposure to extremely low-frequency magnetic fields and electrical shocks and acute myeloid leukemia in four Nordic countries

Research RF Safe Research Library Jan 1, 2015

This Nordic case-control study evaluated whether occupational exposure to extremely low-frequency magnetic fields (ELF-MF) or risk of electrical shocks is associated with acute myeloid leukemia (AML). It included 5,409 AML cases and 27,045 matched controls across four countries, with exposures assigned using…

The effects of radio-frequency electromagnetic fields on T cell function during development

Research RF Safe Research Library Jan 1, 2015

This animal study exposed developing Sprague Dawley rats to 2.14 GHz W-CDMA RF-EMF at a whole-body SAR of 0.2 W/kg for 9 weeks (20 h/day). No differences were reported in multiple T cell population measures across blood, spleen, and thymus. Some Th1/Th2-related genes were upregulated (notably in thymus), but serum…

Subzero 12-hour Nonfreezing Cryopreservation of Porcine Heart in a Variable Magnetic Field.

Research RF Safe Research Library Jan 1, 2015

This animal organ-preservation study compared 12-hour porcine heart preservation at -3°C using a device generating a variable magnetic field versus conventional 4°C preservation. The subzero variable-magnetic-field condition showed higher myocardial ATP, lower lactate, and less mitochondrial ultrastructural damage…

[Modulation of Ca(2+)-Dependent Proteiolysis under the Action of Weak Low-Frequency Magnetic Fields].

Research RF Safe Research Library Jan 1, 2015

This animal/model-organism study examined whether weak low-frequency magnetic fields tuned to a proposed parametric resonance for calcium ions affect Ca(2+)-dependent proteolysis. It reports time-dependent modulation of Ca(2+)-dependent proteinase activity in fish and whelk and states that a minimal exposure time for…

[Synergistic inhibitory effect of static magnetic field and antitumor drugs on Hepa1-6 cells].

Research RF Safe Research Library Jan 1, 2015

This in vitro study tested whether a static magnetic field (SMF) could enhance the effects of cisplatin or adriamycin in Hepa1-6 tumor cells. The abstract reports that SMF combined with either drug increased growth inhibition and was associated with cell-cycle arrest, increased DNA damage, and more severe membrane…

The influence of low-frequency variable magnetic fields in reducing pain experience after dental implant treatment.

Research RF Safe Research Library Jan 1, 2015

This study evaluated magnetostimulation and magnetoledtherapy for pain reduction after dental implant treatment in three groups of 10 patients each. Pain was recorded using a VAS scale, and analgesic use was also tracked. The abstract reports lower pain scores and reduced analgesic use in the magnetostimulation…

Magnetic Nanoparticles with High Specific Absorption Rate at Low Alternating Magnetic Field.

Research RF Safe Research Library Jan 1, 2015

This paper describes synthesis and characterization of magnetic nanoparticles intended for tumor hyperthermia applications. It reports that the particles show relatively high specific absorption rate (22–200 W/g) under a 160 kHz alternating magnetic field at 100–500 Oe, despite low saturation magnetization. The…

[Early and Delayed Effects of Radio Frequency Electromagnetic Fields on the Reproductive Function and Functional Status of the Offspring of Experimental Animals].

Research RF Safe Research Library Jan 1, 2015

This experimental animal study examined RF EMF effects on reproduction in CBA mice and on the morphofunctional status of their offspring under two exposure models. The authors report that repeated short-term RF EMF exposure (5 days, 10 minutes per day, 1.2 mW/cm2) affected pregnancy course, litter number, fertility,…

[Influence of magnetic field on the growth of pathogen microorganisms isolated from the indoor environment at the Archivo Nacional de la República de Cuba].

Research RF Safe Research Library Jan 1, 2015

This in vitro study exposed five microorganisms (including indoor isolates and reference strains) to an extremely low frequency magnetic field (60 Hz, 3 mT) for two hours. The authors report a statistically significant increase in colony counts in exposed samples versus controls, with stronger stimulation in nutrient…

[Influence of Low-Frequency Electromagnetic Field on DNA Molecules in Water Solutions].

Research RF Safe Research Library Jan 1, 2015

This in vitro study reports that hepatitis B and C virus DNA amplicons in water solutions produced a chemiluminescence-registered signal after exposure to low-frequency electromagnetic fields (3–30 Hz; 24–40 A/m). The strongest reported effect occurred at 9 Hz, alongside an observed change in the DNA hydration shell.…

The effect of electromagnetic radiation emitted by display screens on cell oxygen metabolism - in vitro studies.

Research RF Safe Research Library Jan 1, 2015

This in vitro study exposed human blood platelet suspensions to 1 kHz electromagnetic fields at 150 or 220 V/m for 30 or 60 minutes. The authors report increased ROS and MDA (at 220 V/m, 30 min) and decreased antioxidant enzyme activities (SOD-1 and catalase), with the largest changes at 220 V/m for 60 minutes. They…

Gamma radiation and magnetic field mediated delay in effect of accelerated ageing of soybean.

Research RF Safe Research Library Jan 1, 2015

This study evaluated gamma radiation and static magnetic field treatments on soybean seeds stored for six months and then subjected to accelerated ageing. The authors report that certain gamma doses (3–5 kGy) and magnetic field strengths (100–200 mT) helped maintain seed protein/oil characteristics and antioxidant…

Strain in YBCO Double-Pancake Coil With Stainless Steel Overband Under External Magnetic Field.

Research RF Safe Research Library Jan 1, 2015

This engineering study evaluates mechanical hoop strain in a YBCO coated-conductor double-pancake coil intended for a high-field HTS insert in an NMR magnet. The authors present experimental strain-gauge measurements and analytical stress/strain calculations for a coil operated with and without a stainless steel…

← Prev Page 23 / 31 Next →