UA DE EN ES FR IT NL PL BY PT Hygiene and health pt es fr it nl pl by ua de en
sections
  • Hygiene as a science
  • the Sketch of history of development of hygiene
  • Sanitary-and-epidemiologic service sssr
  • Methods of hygienic researches
  • Metrology and standardization
  • Physical factors of air, their hygienic value
  • Humidity of air
  • Solar radiation
  • Weather, a climate, a microclimate
  • Structure of atmospheric air and its hygienic value
  • Hygienic value of pollution of atmospheric air of the closed premises
  • air pollution Sources
  • Features vozniknovenijaizagrjaznenija air and its elimination
  • Sanitary protection of atmospheric air
  • Hygienic and epidemiological value of soil
  • Structure of soil and its hygienic value
  • Pollution and soil self-cleaning
  • Systems of clearing of the occupied places
  • Sewage. The hygienic characteristic
  • Ways of clearing and bezzarazhivanija sewage
  • Clearing of industrial sewage.
  • Hygiene of water and water supply of the occupied places
  • Pollution and self-cleaning of reservoirs
  • Sanitary protection of reservoirs
  • Sanitary requirements to quality of water
  • the Hygienic characteristic of sources of water supply
  • Systems of water supply of the occupied places
  • Head constructions of a waterpipe
  • the Decentralized (local) water supply
  • the Hygienic characteristic of building materials
  • Hygienic requirements to dwelling illumination
  • Hygienic requirements to a dwelling microclimate
  • Hygiene of a food
  • the Subject and problems of hygiene of a food
  • Requirement for mineral elements
  • Physiological norms of a food
  • the Factors defining comprehensibility of food
  • Vitaminization and enrichment by amino acids of foodstuff and ready dishes
  • Methods of conservation of foodstuff
  • Action povyshenoj concentration of hydrogen ions
  • the Hygienic characteristic of foodstuff of an animal origin
  • Food fats and oils
  • the Hygienic characteristic of foodstuff of a phytogenesis
  • Vegetables and fruit
  • the Hygienic characteristic of canned food, preservov and concentrates
  • Flavouring substances and food additives
  • Food poisonings
  • Hygiene of public catering
  • Sanitary rules of trade in foodstuff
  • Hygienic requirements to storage and transportation of foodstuff
  • Personal hygiene of workers of public catering establishments
  • Problems of hygiene of work
  • Industrial harm and professional illnesses
  • Action on an organism of electromagnetic radiation
  • the Statement the ministry zdavoohranenija sssr
  • Mineral elements
  • Laboratory researches
  • Trading premises
  • the sanitary inspection Organization on hygiene of a food in sssr
  • pollution Sources
  • Value of work in the Soviet society.
  • Sediment bowls
  • vodonosnye layers
  • Underground sources
  • temperature Action on fibers
  • Air pollutions
  • soil Structure
  • Speed of movement of air
  • Sanitary value of waters
  • dwelling Ventilation
  • the Conclusion of the enterprises
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    Air pollutions

    Air pollution Degree depends and on its temperature or temperature stratification (temperature stratifications). It is known, that at lifting upwards on each 100 m air temperature decreases on 1 °s. With the help konvektsii warm air rises, and cold falls. Sometimes with lifting on height air temperature does not change (izotermija), concentration of substances polluting atmosphere thus in regular intervals decreases in process of removal from a pollution source. If at lifting on height air temperature does not go down, and rises, such condition is called as inversion. At inversion air at a surface of the Earth appears colder, than at some height, pollution can collect in a ground layer of atmosphere.

    Between concentration of polluting substances in air and temperature of atmospheric air there is an inverse relationship. So, with fall of temperature the maintenance

    Such substances as soot, oksid are grey (IV), the dust, increases.

    Concentration of polluting substances in atmospheric air depends also on atmospheric pressure: with increase of pressure the maintenance of substances in air increases.

    The Great value has also humidity of air. Water steams, being condensed on a surface of various polluting substances, form fogs. Thus concentration of toxic substances in the bottom layers of atmosphere considerably increases.

    Pollution Dispersion in atmosphere depends as well on a modular condition of substances polluting air (firm particles, an aerosol, steams, gas), from duration of their stay in atmosphere (oksid sulfurs (IV) - from several o'clock about several days, oksid carbon (II) - from 1 till 3 months etc.), from features of a source of pollution (the pipes raised, for example, ground motor vehicles, temperature and speed of an exit of an air-gas stream etc.).

    Not all substances polluting inhaled air can be unhealthy the person. Some of them can influence even at the smallest concentration in air (mercury, lead) while harmful action of other connections can be shown only at oche ”n high concentration.

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