Noninvasive Measurements of Magnetic Field Generated by Induced Current within Human Body under Exposure to Very Low Frequency Electromagnetic Fields

Abstract. In the recent years, the task of estimating the currents induced within the human body by environmental electromagnetic fields has received increased attention from scientists around the world. While important progress was made in this direction, the unpredictable behaviour of living biological tissue made it difficult to quantify its reaction to electromagnetic fields and has kept the problem open. A successful alternative to the very difficult one of performing measurements is that of computing the fields within a human body model using numerical methods implemented in a software code. One of the difficulties is represented by the fact that some tissue types exhibit an anisotropic character with respect to their dielectric properties. Our work consists of computing currents induced by extremely low frequency (ELF) electric fields in anisotropic muscle tissues using in this respect, a human body model extended with muscle fibre orientations as well as an extended version of the Finite Integration Technique (FIT) able to compute fully anisotropic dielectric properties.

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Magnetic Field due to the Radiation of High Altitude Lightning

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b1008.0982s1219 ◽

2020 ◽

Vol 8 (2S12) ◽

pp. 49-50

Keyword(s):

Magnetic Field ◽

Electromagnetic Radiation ◽

High Altitude ◽

Low Frequency ◽

Frequency Region ◽

Middle Region ◽

Very Low Frequency ◽

Lightning Discharges ◽

Cloud To Ground Lightning ◽

Frequency Radiation

High altitude optical discharges generated by extreme cloud-to-ground lightning strokes, which occur in the middle region of the atmosphere known as sprites. Streamer formation in sprites has been well stated to be existing by several previous workers. These streamers are not only responsible for the initiation of sprites but also they are composed of these streamers. It causes the production of electromagnetic radiation upto or below the ELF (very low frequency) region which have been reported earlier through various research theories. Thus, we are reporting out for the formulation of the model by using an earlier model used to estimate higher frequency radiation from cloud and ground lightning discharges through these positive corona streamers. Taking it into account, other terms like radiation magnetic field has been evaluated with the studied observations.

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Domain Decomposition for Computing Extremely Low Frequency Induced Current in the Human Body

IEEE Transactions on Magnetics ◽

10.1109/tmag.2010.2076273 ◽

2011 ◽

Vol 47 (5) ◽

pp. 886-889 ◽

Cited By ~ 1

Author(s):

Ronan Perrussel ◽

Damien Voyer ◽

Laurent Nicolas ◽

Riccardo Scorretti ◽

Nöel Burais

Keyword(s):

Domain Decomposition ◽

Human Body ◽

Low Frequency ◽

Induced Current ◽

Extremely Low Frequency

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Trichomonas vaginalis and Giardia lamblia Growth Alterations by Low-Frequency Electromagnetic Fields

Iranian Journal of Parasitology ◽

10.18502/ijpa.v14i4.2111 ◽

2019 ◽

Author(s):

Abraham Octavio RODRÍGUEZ-DE LA FUENTE ◽

Ricardo GOMEZ-FLORES ◽

José Antonio HEREDIA-ROJAS ◽

Edna Marbella GARCÍA-MUÑOZ ◽

Javier VARGAS-VILLARREAL ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Fields ◽

Electromagnetic Fields ◽

Giardia Lamblia ◽

Trichomonas Vaginalis ◽

Low Frequency ◽

Antagonistic Effect ◽

Logarithmic Phase ◽

Physical Factors ◽

Field Exposure

Background: There is an increasing interest in using physical factors such as magnetic fields as antimicrobial strategy, with variable results. The current study was aimed to evaluate the influence of extremely low-frequency electromagnetic fields (ELF-EMFs) on the axenically-cultured parasite protozoans Trichomonas vaginalis and Giardia lamblia growth. Methods: Bioassays were developed using T. vaginalis, GT-13 and G. lamblia IMSS-0989 strains cultured at 37 ºC in TYI-S-33 medium. The following treatment regimens and controls were considered: (a) cells exposed to ELF-EMFs, (b) untreated cells, (c) cells treated with Metronidazole, used as positive controls, and (d) cells co-exposed to ELF-EMFs and Metronidazole. When cultures reached the end of logarithmic phase, they were exposed to ELF-EMFs for 72 h, in a standardized magnetic field exposure facility. For determining cytotoxic effects, trophozoite density was blindly evaluated in a Neubauer chamber. Results: A significant decrease in trophozoite growth was observed for T. vaginalis, in magnetic field-treated cultures. On the other hand, cultures co-exposed to ELF-EMFs and Metronidazole showed no significant differences when compared with cultures treated with Metronidazole alone. On the contrary, an increased trophozoite density was observed in G. lamblia cultures after exposure to magnetic fields. An absence of a synergistic or antagonistic effect was observed. Conclusion: ELF-EMFs induced T. vaginalis and G. lamblia growth alterations, indicating a potential effect in cell cycle progression.

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Intensity of Extremely Low-frequency Electromagnetic Fields Produced in Operating Rooms during Surgery at the Standing Position of Anesthesiologists

Anesthesiology ◽

10.1097/aln.0b013e3181a9188b ◽

2009 ◽

Vol 111 (2) ◽

pp. 275-278 ◽

Cited By ~ 11

Author(s):

Jang Ho Roh ◽

Deok Won Kim ◽

Sung Jin Lee ◽

Ji Young Kim ◽

Sung Won Na ◽

...

Keyword(s):

Magnetic Field ◽

Electromagnetic Field ◽

Operating Room ◽

Electromagnetic Fields ◽

Low Frequency ◽

Standing Position ◽

Operating Rooms ◽

Operating Room Personnel ◽

Sample Number ◽

Extremely Low Frequency

Background Numerous electronic devices have been introduced into operating rooms. Although little is known about the relationship between exposure to electromagnetic fields and health hazards, several studies have demonstrated causal relationships between electromagnetic fields exposure and various symptoms, cancers, and other diseases. Methods This study was approved by the Institutional Review Board. The intensity of extremely low-frequency electromagnetic fields was measured during surgery with the extremely low-frequency electromagnetic field strength measurement system at the standing position of anesthesiologists in 18 operating rooms and analyzed with EMDEX analysis and graphical program (EMCALC 95; ENERTECH, Campbell, CA). Results The average measurement duration per operating room per day was 7.41 +/- 0.70 h (mean +/- SD). The average sample number of measurements was 888.11 +/- 82.75 per operating room. The average magnetic field was 5.83 +/- 5.23 milliGuass (mG) (range, 0.10-33.80 mG), with 70% of these levels 2 mG or greater. Conclusions The authors' results indicate that anesthesiologists in operating rooms are exposed to extremely low-frequency electromagnetic field levels that exceed magnetic field intensity of 2 mG recommended by the Swedish Board for Technical Accreditation for production by computer monitors and detected 30 cm from them. It currently is not clear if this exposure has health effects on anesthesiologists and other operating room personnel.

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