Ўзбекистон республикаси олий ва ўрта махсус таълим вазирлиги ўзбекистон республикаси соғЛИҚни сақлаш

The functional cumulation
is an accumulation of effect of influence. 
The material cumulation
is an ability of substance to collect in an organism. 
Additive action
is a phenomenon of the summarized effects induced by the combined 
influence. 
Synergy
is an intensifying of effect.
Opposing action
is an effect of the combined action which was less expected at a simple 
summation, i.e. the joint effect is less than the sum of effects of each of the substances entering a 
combination at the isolated action on an organism.
Independent action
– it the combined effect doesn't differ from the isolated action of each 
poison.
The saturnism
is an acute and chronic poisoning with lead. 
The merculialism
is an acute and chronic poisoning with hydrargyrum. 
The light stream (F)
is the part of radiant energy causing a feeling of vision in an eye.
Luminous intensity (I)
is a spatial density of a light stream.
Illuminating intensity (E)
is an area density of a light stream.
The coefficient of reflection (r)
is the relation of the light stream reflected from a surface to 
all light stream falling on it.
Visual acuity
is an ability of an eye to see a subject form, i.e. to distinguish its minimum 
sizes, to distinguish its outlines and borders.
Rate of visual perception
– it is defined by the minimum time which is necessary for 
distinction of a subject at its sizes, contrast and brightness of a background. 
Fastness of clear vision
is an ability of an eye a long time to hold the distinct image of the 
considered object, details, letters, etc. 
The color perception
is an ability of an eye to distinguish colors and their shades. 
The lamp
is a lamp and lighting fixtures.
Ventilation
is the organized air exchange promoting maintenance of the required hygienic 
and technological parameters of air and also a complex of technical means on air exchange 
realization.