Impact of exposure to extremely low-frequency magnetic fields on blood pressure, heart rate variation and disturbance to quality of sleep on industrial workers in Korea.

Objectives: This study investigates the potential health risks associated with exposure to extremely low-frequency magnetic fields (ELF-MFs), focusing on the impact on sleep quality. The hypothesis is that increasing ELF-MF exposure will correlate with elevated blood pressure (BP), altered heart rate (HR) dynamics and poorer sleep quality among occupational workers in Korea.

Methods: The study involved 85 participants.

Sri Lankan migrant worker perceptions of workplace hazard and safety awareness: case of the manufacturing industry in Korea.

This study was carried out to understand the perspective of unskilled Sri Lankan employees in the manufacturing industry to gain a deeper understanding to learn how to utilize expatriate labor meaningfully in a host country workplace. The structural questionnaire was developed according to previous studies and international labor standards and was validated with an expert in the field. The questionnaire included three parts covering the basic information, perception of workplace hazards, and health and safety awareness of workers.

Herbal medicine for hemorrhage-related hydrocephalus: A systematic review of randomised controlled trials.

Background & Objective: Hemorrhage related hydrocephalus is a common complication intraventricular hemorrhage, subarachnoid hemorrhage, intracranial hemorrhage and traumatic brain injury. It increases morbidity and disability. The aim of this review is to assess the efficacy of herbal medicine for hemorrhage related hydrocephalus.

ELF-MF occupational exposure in die-casting and electroplating workers in Korea.

A 24-h exposure assessment was performed in two groups of blue-collar workers from a die-casting plant and an electroplating plant to investigate levels of exposure to extremely low-frequency magnetic fields (ELF-MFs), using an EMDEX Lite (Enertech, USA) dosimeter. ELF-MF exposure of workers from the die-casting plant (arithmetic    0.649 ± 1.

Characteristics and potential human health hazards of charged aerosols generated by high-voltage power lines.

We investigated the characteristics of charged aerosols produced by high-voltage power lines (HVPLs) to explore the effects on respiratory disease incidence among those who handle HVPLs. Charged aerosol currents and charged aerosol concentrations were measured over 24 h at 12 sites. Aerosol current effective levels were 2.

Sensitive Tumorigenic Potential Evaluation of Adult Human Multipotent Neural Cells Immortalized by hTERT Gene Transduction.

Stem cells and therapeutic genes are emerging as a new therapeutic approach to treat various neurodegenerative diseases with few effective treatment options. However, potential formation of tumors by stem cells has hampered their clinical application. Moreover, adequate preclinical platforms to precisely test tumorigenic potential of stem cells are controversial.

Absence of DNA damage after 60-Hz electromagnetic field exposure combined with ionizing radiation, hydrogen peroxide, or c-Myc overexpression.

The principal objective of this study was to assess the DNA damage in a normal cell line system after exposure to 60 Hz of extremely low frequency magnetic field (ELF-MF) and particularly in combination with various external factors, via comet assays. NIH3T3 mouse fibroblast cells, WI-38 human lung fibroblast cells, L132 human lung epithelial cells, and MCF10A human mammary gland epithelial cells were exposed for 4 or 16 h to a 60-Hz, 1 mT uniform magnetic field in the presence or absence of ionizing radiation (IR, 1 Gy), H(2)O(2) (50 μM), or c-Myc oncogenic activation. The results obtained showed no significant differences between the cells exposed to ELF-MF alone and the unexposed cells.

Effects of 837 and 1950 MHz radiofrequency radiation exposure alone or combined on oxidative stress in MCF10A cells.

The aim of this study was to determine whether the exposure to either single or multiple radio-frequency (RF) radiation frequencies could induce oxidative stress in cell cultures. Exposures of human MCF10A mammary epithelial cells to either a single frequency (837 MHz alone or 1950 MHz alone) or multiple frequencies (837 and 1950 MHz) were conducted at specific absorption rate (SAR) values of 4 W/kg for 2 h. During the exposure period, the temperature in the exposure chamber was maintained isothermally.

Effects on micronuclei formation of 60-Hz electromagnetic field exposure with ionizing radiation, hydrogen peroxide, or c-Myc overexpression.

Purpose: Epidemiological studies have demonstrated a possible correlation between exposure to extremely low-frequency magnetic fields (ELF-MF) and cancer. However, this correlation has yet to be definitively confirmed by epidemiological studies. The principal objective of this study was to assess the effects of 60 Hz magnetic fields in a normal cell line system, and particularly in combination with various external factors, via micronucleus (MN) assays.

Assessment of the charged aerosol value in copy centers.

This study was performed to examine the potential health effects of copiers on their users and relevant workers by evaluating the charged aerosol current generation characteristics and indoor air quality (IAQ) in the copy center. In the 10 copy centers and one control site that were investigated in this study, the charged aerosol generation characteristics (effective levels, charged aerosol current, and charged aerosol concentration) and air pollutants (fine particles, ozone, and nitrogen oxide) were measured indoors and outdoors, and compared. In addition, a six-day continuous measurement was performed in a copy center to assess the charged aerosol generation characteristics according to the copying volume and the copier operation, and their correlation with indoor air pollutants.

Oxidative stress and antioxidant defenses in asthmatic murine model exposed to printer emissions and environmental tobacco smoke.

Exposure to particulate emissions from printer and cigarette smoke affects the structure and function of mitochondria, which may account for the pathogenesis of respiratory diseases. The addition of charge for the pollutant aerosols may increase the toxicity by their deposition in the lower respiratory tract. The mitochondrial damage in the lung of asthmatic mice was assessed by examining the levels of reactive oxygen species (ROS), lipid peroxides, reduced glutathione, and the activities of isocitrate dehydrogenase, alpha-ketoglutarate dehydrogenase, succinate dehydrogenase, malate dehydrogenase, complexes I to IV, and cytochrome c.