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Hostel for students :: Talks, lectures
The influence of electromagnetic fields on human
Electromagnetic field (EMF) is characterized by the ability of radio frequencies to heat materials; distributed in space and reflected from the interface between two media; interact with matter, so that the electromagnetic fields are widely used in various sectors of the economy: industry, science, technology, medicine, life.
Electromagnetic waves are partially absorbed by the tissues of the biological object, so the biological effect depends on the physical parameters of the radio frequency EMF:
1) wavelength;
2) and intensity of the radiation mode;
3) the duration and nature of exposure of the organism;
4) from the irradiated area and the anatomical structure of organs and tissues.
Under the influence of electromagnetic fields on biological object converts the electromagnetic energy into thermal energy of an external field, which is accompanied by fever or selective heating of local tissues, organs, cells, especially with bad regulators (lens, vitreous body, etc.). thermal effect depends on the radiation intensity.
Step EMI frequencies on the central nervous system with the energy flux density (PFD) of more than 1 m W/cm2 shows its high sensitivity to electromagnetic radiation.
Changes in blood is generally observed, when the PES is higher than 10 mW/cm3 at lower exposure levels observed phase change amount of leukocytes, erythrocytes and hemoglobin.
With prolonged exposure to EMF occurring physiological adaptations or weakening of immunological reactions.
Static electricity - a set of phenomena associated with the emergence, persistence and relaxation free electric charge on the surface and in the bulk dielectric and semiconductor materials, materials, products or isolated conductors.
Studies have shown biological effects that are most sensitive to electrostatic fields nervous, cardiovascular, neuro-humoral and other body systems.
Optical quantum generator - a generator of electromagnetic radiation in the optical range, based on the use of stimulated (stimulated) radiation.
Action lasers on the body depends on the parameters of radiation exposure and localization of Anatomists. Energy laser radiation in biological objects (tissues, organs) may undergo various transformations and cause organic changes in irradiated tissues (primary effects) and changes in the functional nature posletsioricheskie (spillovers). Thus there is incongruous thermal and mechanical effects on the irradiated structure.
The biological action of UV - rays of sunlight is primarily manifested in their positive impact on the human body. Most often due to a lack of sunlight is vitamin deficiency, weakening the protective immuno-reactions, exacerbation of chronic diseases, functional disorders of the nervous system.
UV radiation source of the production can cause acute and chronic diseases.
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