Bioeffects of Extremely Low-Frequency Electromagnetic Fields: Variation with Intensity, Waveform, and Individual or Combined Electric and Magnetic Fields

1979 ◽  
Vol 78 (3) ◽  
pp. 485 ◽  
Author(s):  
E. M. Goodman ◽  
B. Greenebaum ◽  
Michael T. Marron
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Extremely Low Frequency ◽  
Electric And Magnetic Fields

Oxidative stress associated with long term occupational exposure to extremely low frequency electric and magnetic fields

Work ◽  
2020 ◽  
pp. 1-8
Author(s):  
Majid Bagheri Hosseinabadi ◽  
Narges Khanjani ◽  
Pirasteh Norouzi ◽  
Seyed Reza Mirbadie ◽  
Mozhgan Fazli ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Power Plant ◽  
Occupational Exposure ◽  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Exposed Group ◽  
Extremely Low Frequency ◽  
Electric And Magnetic Fields

BACKGROUND: Occupational exposure to extremely low frequency electromagnetic fields (ELF-EMFs) may have harmful effects on biologic systems and has raised many concerns in the last decades. OBJECTIVE: The aim of this study was to determine the effects of exposure to extremely low frequency electric and magnetic fields on lipid peroxidation and antioxidant enzyme activities. METHODS: This study was conducted on 115 power plant workers as the exposed group and 145 office workers as the non-exposed group. The levels of Malondialdehyde (MDA), Superoxide Dismutase (SOD), Catalase (Cat), and Total Antioxidant Capacity (TAC) were measured in the serum of all subjects. Exposure to ELF-EMFs was measured based on spot measurements and the IEEE Std C95.3.1 standard. RESULTS: The levels of MDA, SOD, and Cat in the exposed group were significantly higher than in the non-exposed group. However, the level of TAC was not significantly different between the exposed (2.45±1.02) and non-exposed (2.21±1.07) groups. The levels of MDA and SOD were higher among workers with higher exposure to electric fields than workers with low exposure. All oxidative stress indicators increased with increased exposure to magnetic fields, except TAC. CONCLUSIONS: The antioxidant system imbalance among power plant workers may be related to long term occupational exposure to electromagnetic fields.

scholarly journals The perturbation of electromagnetic fields at distances that are large compared with the object's size

2014 ◽  
Vol 80 (3) ◽  
pp. 865-892 ◽  
Author(s):  
Paul D Ledger ◽  
William R B Lionheart
Keyword(s):  
Magnetic Fields ◽  
Electromagnetic Fields ◽  
Asymptotic Expansions ◽  
Low Frequency ◽  
Perfect Conductor ◽  
Small Object ◽  
Leading Order ◽  
Material Parameters ◽  
Electric And Magnetic Fields

Abstract We rigorously derive the leading-order terms in asymptotic expansions for the scattered electric and magnetic fields in the presence of a small object at distances that are large compared with its size. Our expansions hold for fixed wavenumber when the scatterer is a (lossy) homogeneous dielectric object with constant material parameters or a perfect conductor. We also derive the corresponding leading-order terms in expansions for the fields for a low-frequency problem when the scatterer is a non-lossy homogeneous dielectric object with constant material parameters or a perfect conductor. In each case, we express our results in terms of polarization tensors.

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