Solar radiation and hygienic value

Solar radiation has a multifaceted impact on the human body, in particular and therapeutic. Currently, in some diseases applied heliotherapy - treatment of direct sunlight and aerotherapy - treatment scattered rays.
Sunlight affects the organism in all parts of the spectrum. However, the most important are the ultraviolet rays. Visible and infrared rays have much less effect.
The influence of the rays of the visible part of the spectrum (with wavelength 380-760 mmcm) is carried out mainly through the organ of vision. Rays closer to the red part of the spectrum, there are vitality and exciting, yellow and green rays soothingly, blue, and purple - depressing. Red rays do not irritate the skin, so when excluding other rays, they can help reduce inflammation in the skin.
Invisible infrared rays (located behind red rays of the solar spectrum (with wavelength 760-3400 mmcm) have mostly thermal action, resulting in prolonged exposure occur burns and General overheating.
In characterizing the biological action of ultraviolet rays are distinguished: - rays with the wave length from 400 to 320 mmcm providing weakly pronounced biological effects, rays with the wave length from 320 to 280 mcm providing anti-rickets action and the effect on the skin; the rays with a wavelength of 280 mcm and less providing the destructive effect on tissue proteins. These rays are trapped in the upper atmosphere, making possible organic life on earth.
The UV area of the solar spectrum is significantly weakened both the atmosphere and different additives that are in it. Therefore, as a rule, all resorts, sanatoriums, rest homes are built away from the big cities.
Under the influence of ultraviolet rays in the skin is the splitting of cellular proteins, education coloring matter - of melanin, the transformation of ergosterol in vitamin D. in Addition, ultraviolet rays have antibacterial properties.
In normal conditions on a person are not separate parts of the solar spectrum, and the entire complex rays, included in its composition.
Sunlight increases the tone of the Central nervous system, acting directly on the nerves located in the skin. In addition, the effect on the nervous system is carried out and humoral way (by blood) - products of protein breakdown. These products are formed under the action of sunlight, irritating blood-forming organs, and promote rapid regeneration of blood.
Sunlight activates enzymes that influence different kinds of metabolism in our body (protein, fat, carbohydrate).
In children deprived of sunlight, is developing rickets. In adults occurs brittle bones; in fractures of the bones of the poor slowly grow teeth break easily. This state is called "a light fast." These phenomena can be observed in miners, people living in the North. To prevent such violations recommended systematic UVB irradiation in special Patriach, vitamin D.
Sunlight has a beneficial effect not only with the direct irradiation of the body. He heals the environment, destructive acting on microorganisms. Under the influence of direct sun rays germs are killed in the period from several minutes to several hours. To ensure maximum use of natural light, you must place the building so that in accommodations got direct sunlight.
Window glass and them to settle on the dust absorbs a significant part of ultraviolet rays. Currently our industry began to produce so-called uviol Windows, which let in ultraviolet rays.