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9 posts

Effect of Increased Ionizing Radiation and Near-Null Magnetic Field on Electrical Signals of Plants

Research RF Safe Research Library Jan 1, 2025

This experimental study examined how increased β ionizing radiation (31.3 μGy/h) and hypomagnetic conditions (0–1.5 μT) affect plant electrical signaling responses to stimuli. It reports enhanced electrical signals under increased ionizing radiation and weakened signals under near-null magnetic field conditions. The authors suggest these effects may be mediated by changes in reactive oxygen species involved in stress signaling.

Extremely Low-Frequency Magnetic Fields (ELF-MF) and Radiofrequency: Risk of Childhood CNS Tumors in a City with Elevated ELF-MF Exposure

Research RF Safe Research Library Jan 1, 2025

This case-control study in Mexico City (2017–2022) evaluated residential ELF-MF and device-use proxies for RF exposure in relation to childhood CNS tumor risk. Elevated residential ELF-MF (≥0.4 μT) was associated with approximately doubled odds of CNST, while cell phone use showed no association. Prolonged tablet use, with or without internet connectivity, was reported to be associated with higher CNST risk.

Female Crabs Are More Sensitive to Environmentally Relevant Electromagnetic Fields from Submarine Power Cables

Research RF Safe Research Library Jan 1, 2025

This controlled laboratory study examined sex-specific behavioral responses of juvenile shore crabs to magnetic fields intended to represent submarine power cable EMFs. Females showed consistent attraction to EMF-exposed zones across 500–3,200 μT exposures, whereas males showed no consistent spatial preference. The authors suggest such sex-specific sensitivity could disrupt female-driven behaviors relevant to migration and reproduction, with potential ecological implications.

Exposure of human lymphocytes to sweeping-frequency extremely low frequency magnetic field

Research RF Safe Research Library Jan 1, 2025

This in vitro study exposed human umbilical cord blood lymphocytes to a sinusoidal sweeping-frequency ELF magnetic field (3–26 Hz) for 48 hours at amplitudes from 6 to 24 μT. It reports no statistically significant effects on DNA damage/repair foci or apoptosis measures overall. A non-significant trend at 8 μT showed lower γH2AX foci (p = .064) and data suggesting fewer viable cells at the same intensity, which the authors discuss as potentially protective against DNA double-strand breaks.

The proliferation rates of HT-1080 human fibrosarcoma cells can be accelerated or inhibited by weak static and extremely low frequency magnetic fields

Research RF Safe Research Library Jan 1, 2025

This in vitro study exposed HT-1080 human fibrosarcoma cells for 4 days to weak extremely low frequency magnetic fields (10 μT, 12–33 Hz) superimposed on a 45 μT static field. The authors report frequency- and amplitude-dependent increases or decreases in cell growth, including sharp inversions near 16.5 Hz with small parameter changes or reversal of the static field direction. Associated changes in membrane potential, intracellular calcium, and mitochondrial superoxide are presented as supporting a bioenergetic mechanism.

Sleep and Arousal Hubs and Ferromagnetic Ultrafine Particulate Matter and Nanoparticle Motion Under Electromagnetic Fields: Neurodegeneration, Sleep Disorders, Orexinergic Neurons, and Air Pollution in Young Urbanites

Research RF Safe Research Library Jan 1, 2025

This review/overview argues that ultrafine particulate matter and industrial nanoparticles can reach the brain and accumulate in sleep and arousal regulatory regions, including orexinergic neuron hubs. It reports that ferromagnetic particles in these regions show motion responsive to low-intensity electromagnetic fields (30–50 μT) and describes links to sleep disturbances and neurodegenerative disease markers in young urban residents. The authors frame combined air pollution nanoparticle exposure and low-level EMF as a significant threat and call for monitoring and protective strategies.

Residential exposure to magnetic field due to high-voltage power lines and childhood leukemia risk in mainland France - GEOCAP case-control study

Research RF Safe Research Library Jan 1, 2025

This French GEOCAP registry-based case-control study evaluated childhood acute leukemia risk in relation to residential proximity to high-voltage overhead power lines and modeled ELF magnetic-field exposure. It reports an increased risk for children under 5 living within 50 m of power lines, particularly when restricting to high-quality geocoded addresses. However, modeled ELF-MF exposure >0.3 µT was not associated with increased risk, and the authors suggest proximity may capture other factors and call for further research and precaution.

The Frequency of a Magnetic Field Determines the Behavior of Tumor and Non-Tumor Nerve Cell Models

Research RF Safe Research Library Jan 1, 2025

This in vitro study exposed glioblastoma (CT2A), neuroblastoma (N2A), and non-tumor astrocyte (C8D1A) cell models to a 100 μT magnetic field across 20–100 Hz for 24–72 hours. The abstract reports decreased viability and proliferation in the tumor cell models within a frequency window centered at 50 Hz, while astrocyte viability increased at 20 and 40 Hz. The authors conclude that frequency is a key determinant of cell-type-specific responses consistent with a “biological window” model.

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 configuration, and finite element modeling was reported to align closely with measurements.

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