Task № 1
1. Least intensive redden (erythema) on a skin of a forearm of the student in 20 hours
after a local irradiation was showed by lamp LE-30 under the first window of a
biodosimiter of Gorbachev with which help an irradiation carried out
throughout 6 minutes. Calculate the optimum and preventive dose.
2. For air sanitation in a school class (the area 50 м2, height 3,5 m) in a period of
the flu epidemic was used an irradiator with lamps BUV-30 during 1 hour. Air
crops on MPA in a cup Peter before and after an irradiation carried out Krotov's
device (speed of crops of 20 l/mines during 10 mines). Give a hygienic
estimation of efficiency of sanitation if before sanitation on MPA in a cup of
Petri has sprouted 65 colonies, and after - 12.