Download Extremely Low Frequency Fields (Environmental Health by World Health Organization PDF

By World Health Organization

This monograph represents the main thorough wellbeing and fitness probability review at the moment on hand on tremendous low frequency electrical and magnetic fields. In October 2005, WHO convened a job staff of medical specialists to evaluate any hazards to health and wellbeing that will exist from publicity to ELF electrical and magnetic fields within the frequency variety >0 to 100,000 Hz (100 kHz). the duty workforce reviewed facts for a couple of overall healthiness results, and up-to-date the facts concerning melanoma. The conclusions and proposals of the duty staff are offered during this quantity.

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Extra resources for Extremely Low Frequency Fields (Environmental Health Criteria)

Sample text

Since the publication of the IARC monograph the evidence for other childhood cancers remains inadequate. Subsequent to the IARC monograph a number of reports have been published concerning the risk of female breast cancer in adults associated with ELF magnetic field exposure. These studies are larger than the previous ones and less susceptible to bias, and overall are negative. With these studies, the evidence for an association between ELF magnetic field exposure and the risk of female breast cancer is weakened considerably and does not support an association of this kind.

The wavelength is the distance between two successive cycles of the wave. In free space it is related to the frequency by the formula wavelength = speed of light / frequency. At 50 Hz, the wavelength is very long, 6000 km (60 Hz: 5000 km). In comparison, a radio wave with a frequency of 100 kHz has a wavelength of 3 km. 2 Quantities and units For magnetic fields, there are two different quantities: the magnetic flux density, usually designated B, and the magnetic field strength, usually designated H.

Overall, the evidence does not support an association between ELF exposure and cardiovascular disease. 8 Immunology and haematology Evidence for the effects of ELF electric or magnetic fields on components of the immune system is generally inconsistent. Many of the cell populations and functional markers were unaffected by exposure. However, in some human studies with fields from 10 µT to 2 mT, changes were observed in natural killer cells, which showed both increased and decreased cell numbers, and in total white blood cell counts, which showed no change or decreased numbers.

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