scholarly journals Influence of Electric, Magnetic, and Electromagnetic Fields on the Circadian System: Current Stage of Knowledge

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Bogdan Lewczuk ◽  
Grzegorz Redlarski ◽  
Arkadiusz Żak ◽  
Natalia Ziółkowska ◽  
Barbara Przybylska-Gornowicz ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Transmission Lines ◽  
Negative Impact ◽  
Low Frequency ◽  
Circadian System ◽  
Physical Parameters ◽  
Electrical Transmission ◽  
Current State ◽  
Frequency Magnetic Field

One of the side effects of each electrical device work is the electromagnetic field generated near its workplace. All organisms, including humans, are exposed daily to the influence of different types of this field, characterized by various physical parameters. Therefore, it is important to accurately determine the effects of an electromagnetic field on the physiological and pathological processes occurring in cells, tissues, and organs. Numerous epidemiological and experimental data suggest that the extremely low frequency magnetic field generated by electrical transmission lines and electrically powered devices and the high frequencies electromagnetic radiation emitted by electronic devices have a potentially negative impact on the circadian system. On the other hand, several studies have found no influence of these fields on chronobiological parameters. According to the current state of knowledge, some previously proposed hypotheses, including one concerning the key role of melatonin secretion disruption in pathogenesis of electromagnetic field induced diseases, need to be revised. This paper reviews the data on the effect of electric, magnetic, and electromagnetic fields on melatonin and cortisol rhythms—two major markers of the circadian system as well as on sleep. It also provides the basic information about the nature, classification, parameters, and sources of these fields.

scholarly journals Human Gingival Fibroblasts Exposed to Extremely Low-Frequency Electromagnetic Fields: In Vitro Model of Wound-Healing Improvement

2019 ◽  
Vol 20 (9) ◽  
pp. 2108 ◽  
Author(s):  
Erica Costantini ◽  
Bruna Sinjari ◽  
Chiara D’Angelo ◽  
Giovanna Murmura ◽  
Marcella Reale ◽  
...  
Keyword(s):  
Wound Healing ◽  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Wound Repair ◽  
Healing Process ◽  
Low Frequency ◽  
Gingival Fibroblasts ◽  
Field Exposure ◽  
Extremely Low Frequency

Several clinical studies have suggested the impact of sinusoidal and pulsed electromagnetic fields in quickening wound repair processes and tissue regeneration. The clinical use of extremely low-frequency electromagnetic fields could represent a novel frontier in tissue repair and oral health, with an interesting clinical perspective. The present study aimed to evaluate the effect of an extremely low-frequency sinusoidal electromagnetic field (SEMF) and an extremely low-frequency pulsed electromagnetic field (PEMF) with flux densities of 1 mT on a model of oral healing process using gingival fibroblasts. An in vitro mechanical injury was produced to evaluate wound healing, migration, viability, metabolism, and the expression of selected cytokines and protease genes in fibroblasts exposed to or not exposed to the SEMF and the PEMF. Interleukin 6 (IL-6), transforming growth factor beta 1 (TGF-β), metalloproteinase 2 (MMP-2), monocyte chemoattractant protein 1 (MCP-1), inducible nitric oxide synthase (iNOS), and heme oxygenase 1 (HO-1) are involved in wound healing and tissue regeneration, favoring fibroblast proliferation, chemotaxis, and activation. Our results show that the exposure to each type of electromagnetic field increases the early expression of IL-6, TGF-β, and iNOS, driving a shift from an inflammatory to a proliferative phase of wound repair. Additionally, a later induction of MMP-2, MCP-1, and HO-1 was observed after electromagnetic field exposure, which quickened the wound-healing process. Moreover, electromagnetic field exposure influenced the proliferation, migration, and metabolism of human gingival fibroblasts compared to sham-exposed cells. This study suggests that exposure to SEMF and PEMF could be an interesting new non-invasive treatment option for wound healing. However, additional studies are needed to elucidate the best exposure conditions to provide the desired in vivo treatment efficacy.

scholarly journals Evaluations of the Effects of Extremely Low-Frequency Electromagnetic Fields on Growth and Antibiotic Susceptibility ofEscherichia coliandPseudomonas aeruginosa

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
B. Segatore ◽  
D. Setacci ◽  
F. Bennato ◽  
R. Cardigno ◽  
G. Amicosante ◽  
...  
Keyword(s):  
Growth Rate ◽  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Antibiotic Susceptibility ◽  
Low Frequency ◽  
Antibiotic Sensitivity ◽  
Control Groups ◽  
E Coli ◽  
Extremely Low Frequency ◽  
Number Of Cells

We aimed to investigate the effects of exposure to extremely low-frequency electromagnetic fields (2 mT; 50 Hz) on the growth rate and antibiotic sensitivity ofE. coliATCC 25922 andP. aeruginosaATCC 27853. The electromagnetic field treatment significantly influenced the growth rate of both strains when incubated in the presence of subinhibitory concentrations of kanamycin (1 μg/mL) and amikacin (0.5 μg/mL), respectively. In particular, at 4, 6, and 8 h of incubation the number of cells was significantly decreased in bacteria exposed to electromagnetic field when compared with the control. Additionally, at 24 h of incubation, the percentage of cells increased (P. aeruginosa∼42%;E. coli∼5%) in treated groups with respect to control groups suggesting a progressive adaptive response. By contrast, no remarkable differences were found in the antibiotic susceptibility and on the growth rate of both bacteria comparing exposed groups with control groups.

Prediction of Silencer Performance Using Transmission Line Theory

1971 ◽  
Vol 93 (4) ◽  
pp. 404-410
Author(s):  
R. J. Wells ◽  
R. B. Tatge
Keyword(s):  
Gas Turbine ◽  
Transmission Lines ◽  
Low Frequency ◽  
Frequency Range ◽  
Electrical Transmission ◽  
Transmission Line Theory ◽  
One Dimensional ◽  
Line Theory ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

The size and cost of gas turbine exhaust silencers are largely set by low-frequency requirements. In that frequency range, the silencer cross-dimensions are small compared to the wavelength; it can therefore be considered to be one dimensional. Equations analogous to those governing electrical transmission lines can be written to predict the acoustical performance. Agreement between measured and predicted attenuation is good.

scholarly journals Electromagnetic Fields Effects on the Secondary Structure of Lysozyme and Bioprotective Effectiveness of Trehalose

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Emanuele Calabrò ◽  
Salvatore Magazù
Keyword(s):  
Electromagnetic Field ◽  
Spectral Analysis ◽  
Secondary Structure ◽  
Mobile Phone ◽  
Ftir Spectroscopy ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Ftir Spectra ◽  
Vibration Band ◽  
Extremely Low Frequency

FTIR spectroscopy was used to investigate the effects of extremely low frequency (50 Hz) electromagnetic field and of microwaves at 900 MHz on the secondary structure of a typical protein, the lysozyme, evaluating the bioprotective effectiveness of trehalose. Lysozyme in D2O solution (60 mg/ml) was exposed to 50 Hz frequency electromagnetic field at 180 μT. The FTIR spectra indicated an increase of CH2 group at 1921 and 1853 cm−1 after 3 h of exposure. Such effect was not observed after the addition of trehalose (150 mg/mL) at the same exposure conditions. Lysozyme dissolved in D2O at the concentration of 100 mg/mL was exposed up to 4 h to 900 MHz mobile phone microwaves at 25 mA/m. A significant increase in intensity of the amide I vibration band in the secondary structure of the protein was observed after 4 h exposure to microwaves. This effect was inhibited by the presence of trehalose at the concentration of 150 mg/mL. Fourier self-deconvolution spectral analysis of lysozyme in D2O solution after exposure to microwaves revealed an increase in intensity of the conformational components of amide I mode, particularly of β-sheet and turn that can be attributed to disorder and unfolding processes of the protein.

scholarly journals Research Of Effect Of Low Frequency Magnetic Field On Germination, Growth And Fruiting Of Field Tomatoes

2015 ◽  
Vol 18 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Jaroslav Jedlička ◽  
Oleg Paulen ◽  
Štefan Ailer
Keyword(s):  
Seed Germination ◽  
Plant Growth ◽  
Electromagnetic Fields ◽  
Low Frequency ◽  
Agricultural Practice ◽  
Tomato Variety ◽  
Electromagnetic Stimulation ◽  
Frequency Magnetic Field ◽  
Generative Phase ◽  
The Impact

AbstractIn the study regarding with tomatoes, the impact of extremely low frequency electromagnetic fields on seed germination of tomato (Solanum lycopersicumL.) after treatment before sowing, as well as the growth following electromagnetic stimulation of young plants at a time before planting in the field, and fruittraits was investigated. In the experiments conducted in two consecutive years (2012 and 2013), we followed the time of seed germination of tomato variety “Pavlina”, plant growth and the fruitsize. Magnetization of seeds and young plants was carried out in laboratory conditions, and plant growth and fruits were followed in field conditions where plants were grown on experimental plots (25.0 m2). The plants were grown in accordance with the standards of agricultural practice for tomato. At the generative phase, fruits were collected at regular intervals, and their number and weight were evaluated. Low frequency electromagnetic fields acting at the three inductance levels (20, 40 and 60 mT) and exposure of 20 minutes a day with frequency of 50 Hz, significantly influenced the germination, plant growth and fruitsize of the studied tomato variety.

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

2009 ◽  
Vol 111 (2) ◽  
pp. 275-278 ◽  
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.

scholarly journals Influence of electromagnetic fields on the human organism

2021 ◽  
Vol 4 (46) ◽  
pp. 8-8
Author(s):  
Alexander Saakian ◽  
◽  
Keyword(s):  
Electromagnetic Field ◽  
Mobile Devices ◽  
Electromagnetic Fields ◽  
Black Sea ◽  
Negative Impact ◽  
Cell Phones ◽  
Human Organism ◽  
Negative Effect ◽  
Engineering Institute

The article presents measures to reduce the negative impact of electromagnetic fields emanating from cell phones on the human organism. The topic of the work is relevant, since at present the role of mobile devices in the life of the modern person is rapidly increasing. The analysis of the measured electromagnetic field levels of the telephones of various brands in the "standby" and "ringing" modes was carried out. Poll that was conducted among students of the Azov-Black Sea Engineering Institute on the usage of mobile devices was also analyzed. Keywords: ELECTROMAGNETIC FIELD, MOBILE PHONE, NEGATIVE EFFECT, MEASUREMENT, POLL

Therapeutic Application of Musically Modulated Electromagnetic Fields in the Treatment of Musculoskeletal Disorders

2012 ◽  
Vol 10 (3) ◽  
pp. 257-267
Author(s):  
C. Corallo ◽  
M. Rigato ◽  
E. Battisti ◽  
A. Albanese ◽  
S. Gonnelli ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Musculoskeletal Disorders ◽  
Electromagnetic Fields ◽  
Experimental Studies ◽  
Low Frequency ◽  
Experimental Point ◽  
Therapeutic Application ◽  
Extremely Low Frequency ◽  
Positive Effects

Different studies have demonstrated the efficacy of extremely low frequency electromagnetic fields (ELF EMFs) in the treatment of pain. In particular, the positive effects of ELF EMFs seems to depend on their respective codes, such as frequency, intensity and waveform, even if the exact mechanism of interaction is still debated. The most commonly used for extremely low frequency magnetotherapy is a 100Hz sinusoidal field (ELF) with a mean of induction of few Gauss. This article reviews the therapeutic application of a musically modulated electromagnetic field (TAMMEF), a new-generation of electromagnetic field used for extremely low frequency magnetotherapy characterized by variable frequencies, intensities and waveforms. Both clinical and experimental studies, performed by authors of the present review, have demonstrated the efficacy of ELF and the new TAMMEF systems in several musculoskeletal disorders such as osteoarthritis, rheumatoid arthritis, carpal tunnel syndrome, shoulder periarthritis and cervical spondylosis. Moreover, it has been demonstrated that ELF and TAMMEF systems are not only effective, but also safe, from clinical and experimental point of view. In fact, clinical trials did not reported any undesired side effect, while in vitro studies showed that ELF EMFs did not induce uncontrolled cell proliferation, did not affect cell viability and did not induce apoptosis. With their efficacy and safety, ELF and even more the new TAMMEF systems represent a valid complementary or alternative treatment to standard pharmacological therapies in reducing both pain and inflammation of patients affected by musculoskeletal disorders.

scholarly journals ВПЛИВ ЕЛЕКТРОМАГНІТНИХ ПОЛІВ НА АКТИВНІСТЬ ОКСИДОРЕДУКТАЗ ДЕЯКИХ ВИДІВ БАЗИДІОМІЦЕТІВ

2013 ◽  
Vol 3 (02) ◽  
pp. 45
Author(s):  
Т. E. Voloshko ◽  
О. V. Fedotov
Keyword(s):  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Prolonged Exposure ◽  
Negative Impact ◽  
Spectrophotometric Methods ◽  
Agrocybe Cylindracea ◽  
Level Of Activity ◽  
Catalase Peroxidase ◽  
Weight Method ◽  
Peptone Medium

<p>The influence of electromagnetic fields of various modes of irradiation on the activity of oxidoreductases of basidiomycetes <em>Agrocybe cylindracea</em>; <em>Pleurotus ostreatus</em> and <em>Fistulina hepatica</em> in culture was investigated. The strains were cultured of glucose-peptone medium for 12 days. The accumulation of oven-dry biomass was determined by the weight method. The content of soluble protein, catalase, peroxidase and superoxide dismutase activities was determined by the spectrophotometric methods. It was found, that the level of activity of the enzymes depends on the frequency, power and duration of the effects of electromagnetic fields significantly. It was record a positive effect of the electromagnetic field with a frequency of 27.12 Hz, 70 watts. It was reveal the negative impact of electromagnetic field with a frequency of 0.8-2.4 GHz (GSM Wi-Fi range). It was found, that the fungal cultures are capable of adapting to prolonged exposure of effects of electromagnetic fields.</p> <p><em>Key words: the electromagnetic field, basidiomycetes, the activity of oxidoreductases.</em></p>

Sign in / Sign up

Export Citation Format

Share Document