properties of air - is the temperature, barometric pressure, humidity, mobility, solar radiation, the state of the electric field.All these factors affect the human body.
complex physical factors determine the climate.These are the basic properties of the air in the value of its temperature, the relative humidity and the mobility that affect the regulation of human heat.
temperature
Thermal properties of air is determined by its temperature.This factor describes the thermal state of the human body and the external environment, ie,heat transfer, which consists of heat production and heat loss.
heat production is the result of oxidation of food and the release of heat during muscle contraction, solar heat, hot objects, hot meals and warm air.
Heat is due to conduct or convection, radiation, or radiation, evaporation.
When exposed to high temperatures reduces the body immunity and increases the overall incidence.According to the laws of heat radiation (Stefan-Boltzmann law, Kirchhoff, Wines), hot objects radiate heat is more intense than their temperature rises, and the emission spectrum is shifted toward shorter wavelengths, which contributes to a deeper, penetrating heat to the body.
low temperature causes an increase in heat loss by radiation and convection, which leads to a cooling of the body due to a shortage of heat.There is a lowering of the temperature of the skin, loss of pain sensitivity, easing muscle activity, appear muscle weakness, and drowsiness.
Humidity
properties characterized by its air humidity, which is determined by the content of water vapor in the air.
Absolute humidity is the content of 1 cu.meter of water vapor in grams.The hygienic practice usually accounted for the relative humidity.
Relative humidity is considered to be its degree of water vapor saturation (%).This ratio of the absolute humidity to that amount of moisture that saturates the air.Saturation deficit is the difference between the maximum and the absolute humidity.
Air Mobility
Air Mobility characterizes the speed of its movement.It is determined by the number of meters which air passes in a second.At moderate air mobility and high temperature cooling of the skin occurs, and high mobility and a low temperature air - hypothermia.Frosty weather quiet transferred more easily than during a strong wind.
considered the most favorable rate of movement of air masses, is 1-5 m / s, and in the territory of the premises - 0.1-0.3 meters per second.
Atmospheric pressure
properties of air determines the atmospheric pressure, ie,the pressure on the ground surface.The higher above the ground, the lower the pressure and air density.
Significant increases and decreases in atmospheric pressure adversely affect the human body.
low atmospheric pressure causes hypoxia (oxygen starvation), which is sensitive to the brain, t. To. He consumes oxygen is 30 times more than other cells.
Air Ionization
This disintegration of the molecules and atoms of the gas under the influence of ionizers, ieradiation, and ultraviolet light of the sun, cosmic rays, heating surfaces, water spray, etc..
ionounichtozheniya processes in the atmosphere and ionization occur constantly, as a result, a set ionization equilibrium.
in clean air contains more light ions in polluted - heavy.At the waterfall and on the banks of rivers content of light ions reaches 40 thousand. 1 cube.see air in the villages - 2-3 ths., in the cities this number is reduced to 4 thousand. 1 cube.cm.
ionization mode determined by the coefficient of pollution, ieratio of the number of heavy ions to the number of light and the coefficient of unipolarity.
Properties Air also determine the electric field of the earth, the radioactivity of the air and the magnetic field.
