electromagnetic field


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Related to electromagnetic field: Electromagnetic field tensor

electromagnetic field

Public health
An invisible field of electromagnetic radiation on the spectrum of energetic particles that move as quanta (radiowaves, infrared, visible light, UV light and gamma radiation). EMFs are generated by moving electric charges that propagate outward from any object carrying an electric current, and result from: 
(1) The electric field that pushes or pulls ions toward or away from the field; the electrical component of an EMF is blocked by most objects, from skin to concrete, and has a strength of 1 mV/m2, which is similar to the strength of the cells’ intrinsic electrical activity;
(2) The magnetic field that acts on moving particles, pushing them perpendicularly to their direction of motion, which passes through most matter without losing strength; the actual power generated by a magnetic field is a few milligauss (1% of the strength of the earth’s magnetic field).

Tumour cells exposed in vitro to extremely low electromagnetic fields (ELF) of 60-Hz electromagnetic radiation from electrical distribution systems (power lines, video display terminals, household appliances) have increased mitotic activity; some reports have suggested that ELF radiation is associated with a 1.5–2.5-fold increase in leukaemia, lymphomas and intracranial malignancy, especially in children living near either 765-kV power lines or 15-kV distribution lines. Although ELF increases ornithine decarboxylase activity or cell membrane resistance to spontaneous lysis, the relationship of ELF to malignancy is controversial and inconclusive.

electromagnetic field

Abbreviation: EMF
The region in space in which the photons produced by moving electric charges have an effect. EMFs can be produced by power lines, radio waves, and microwaves. The energy produced in an EMF increases as the frequency of the photons increases, and EMFs produced by very high frequency photons (e.g., xrays and gamma rays) are sufficiently energetic to induce cancer.
See also: field

electromagnetic field (EMF),

n three-dimensional areas that represent the mutual interaction of magnetic and electric forces.
References in periodicals archive ?
Here again it can be concluded that 15 minutes treatment of electromagnetic field (2mT), is the critical point of catalase activities.
27-6] is thus resolved: the electromagnetic field energy resides in the distortions (transverse displacements) of the spacetime continuum.
Due to increasing public concerns, the government requested the appointment of an Expert Committee to assess whether such low-level electromagnetic fields could cause health effects.
2002) presented a method for simulating the electromagnetic field based on turning radiation directivity diagrams around axis z in the vertical plane and evaluating directivity diagrams in the horizontal plane.
King Abdulaziz City for Science and Technology (KACST) in its study "The impact of electromagnetic fields generated by 380 kV overhead power lines on public health and devices" concluded that the Aerial cable located approximately 100 meters from facilities, has no effect on human health or on the environment.
The propagation of electromagnetic waves in microwave structures is closely related to the electromagnetic field of the wave with the charges or currents on the boundaries of the structure, with certain conditions of reflection at these boundaries, and not only.
In any operating room containing multiple machines generating multiple electromagnetic fields, it can be confusing in identifying equipment responsible for any potential electrical injury.
Electromagnetic fields and radiation of all the bands of the natural electromagnetic spectrum literally permeate the Earth's biosphere.
Until further research clarifies whether or not there are adverse health effects due to exposure to electromagnetic fields, there are a number of precautions to take in order to minimize potential harm from electromagnetic field exposure, especially when it concerns the use of electric blankets and VDTs.
Rats in test group were exposed to electromagnetic field with 1mt intensity, 8-hour-daily for 2 months.
Examination of the pump residue showed that it was composed of a large number of complex and randomly mixed phases without any apparent structural directionality that could be linked to the electromagnetic field and/ or the layered buildup of the deposit (Fig.
This is caused by the fundamental properties of electromagnetic field, namely, reflection and additivity.

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