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33 posts

Bus-exposure matrix, a tool to assess bus drivers' exposure to physicochemical hazards

Research RF Safe Research Library Jan 1, 2025

This paper describes the development of a Bus-Exposure Matrix (BEM) to retrospectively estimate Swiss bus drivers’ exposures to 10 physicochemical hazards, including electric and magnetic fields. Measurements in representative buses were combined with technical inventories and INLA modeling to estimate annual exposures from 1985–2022. Reported trends include increasing peak noise and electric-field exposures over time, alongside decreases in several air pollution, vibration, and noise metrics.

Impairment of Oogenesis and Folliculogenesis in Neonatal Rats after Maternal Exposure to Mobile Phones

Research RF Safe Research Library Jan 1, 2025

This animal study examined maternal mobile phone exposure during different gestational windows in Wistar rats and assessed ovarian development and hormones in neonatal offspring. Compared with sham (phone off), exposed groups (standby and conversation/standby) were reported to have lower neonatal estrogen and progesterone and reduced primordial follicle/primary oocyte measures, with stronger effects after longer exposure. The study also reports increased primordial follicle apoptosis, particularly in the conversation/standby condition, and notes effects even with first-week gestational exposure.

Effect of Occupational Exposure to Low-frequency Electromagnetic Fields on Cataract Development

Research RF Safe Research Library Jan 1, 2025

This cross-sectional epidemiologic study enrolled 100 employees of an electricity company to assess whether occupational low-frequency electromagnetic field exposure is associated with cataract development. Cataract frequency was higher in exposed versus non-exposed groups, and nuclear opacity grading differed significantly between groups. Within exposed workers, nuclear and posterior subcapsular cataract grades were associated with longer work experience, suggesting occupational exposure may be a risk factor, particularly for nuclear cataracts.

Effect of electromagnetic field radiation on transcriptomic profile and DNA methylation level in pig conceptuses during the peri-implantation period

Research RF Safe Research Library Jan 1, 2025

This in vitro study exposed pig conceptuses (days 15–16 of pregnancy) to 50 Hz ELF-EMF for 2 hours and assessed transcriptomic and DNA methylation changes. The authors report altered expression of 21 protein-coding transcripts and an approximately 16-fold increase in genomic DNA methylation, with promoter methylation changes in several named genes. They conclude ELF-EMF interacts with gene expression and DNA methylation processes during early development and call for further safety research.

The Impact of Mobile Phone Electromagnetic Waves on the Neurons and Blood Brain Barrier Integrity in the Chick Embryo

Research RF Safe Research Library Jan 1, 2024

This animal study exposed chick embryos to electromagnetic waves from a mobile phone and compared them with unexposed controls. Electron microscopy on days 10 and 15 reported neuronal and cerebellar cellular alterations in the exposed group, including features described as apoptosis and mitochondrial swelling. The authors also report compromised blood-brain barrier integrity and conclude the exposure adversely affects brain development.

The effects of radiofrequency exposure on male fertility: A systematic review of human observational studies with dose-response meta-analysis (SR 3)

Research RF Safe Research Library Jan 1, 2024

This systematic review and dose-response meta-analysis synthesizes human observational studies on radiofrequency EMF exposure and male fertility outcomes. It reports evidence of an association between RF exposure and poorer sperm parameters, including reduced quality, motility, and viability. The authors frame the findings as consistent with potential reproductive health risks and call for continued risk assessment and guideline development.

RF Shielded Hat for Protecting Cameraman from EMF Exposure

Research RF Safe Research Library Jan 1, 2014

The paper describes the development of RF-shielded hats using a microwave absorbing sheet intended to reduce EMF exposure to a cameraman’s head. Three hat designs are described, and measurements are planned/performed in an anechoic chamber using a wireless video camera operating around 1.9–2.7 GHz, including a 2.45 GHz signal condition and a sham condition. The abstract does not report quantitative results on whether exposure was reduced.

The effects of microwave emitted by cellular phones on ovarian follicles in rats

Research RF Safe Research Library Jan 1, 2009

This animal study examined whether prenatal exposure to mobile phone microwaves affects ovarian development in rats. Pregnant rats were exposed to a phone placed under the cage throughout pregnancy, with mostly standby exposure and brief periodic speech-mode exposure. Female pups assessed at 21 days had fewer ovarian follicles in the exposed group than in controls, which the authors interpret as a toxic effect on ovaries.

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