Accession Number : AD0703889

Title :   QUANTITATIVE CONTENT OF MICROORGANISMS IN HIGH ATMOSPHERIC LAYERS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kishko,Ya. G.

Report Date : 26 FEB 1970

Pagination or Media Count : 12

Abstract : From May to September 1957 bacteriological investigations of high altitude air in a vertical section were conducted. Air samples were collected by mounting in the window of an LI-2 sounding aircraft a collector in which a Petri dish with a nutrient medium was placed during the investigations. Twenty-five flights were made under various meteorological conditions. As the results of investigations showed most inseminated with microorganisms was the air layer ajoining the earth up to 500 m (846-624 colonies in 1 m(superscript 3) of air). With altitude the quantity of microorganisms decreased at an altitude of 3000 m by eight times, at an altitude of 7000 m by more than 100 times. It was also noticed that under the conditions of the high layers of the atmosphere there exists a definite relationship in the content of microorganisms with the humidity of the air- the dryer the air, the less microorganisms are in it. Clouds, as observations have shown, contained a greater amount of microorganisms. If the content of microorganisms cloud level for 264 colonies in 1 m(superscript 3) of air is taken as the standard at 100 percent, then in clouds it was equal to 215.1 percent and above the clouds only 53.7 percent. (Author)

Descriptors :   (*MICROORGANISMS, *UPPER ATMOSPHERE), DISTRIBUTION, QUANTITATIVE ANALYSIS, ALTITUDE, METEOROLOGICAL PHENOMENA, COLLECTING METHODS, HUMIDITY, CLOUDS, USSR, AEROBIOLOGY

Subject Categories : Atmospheric Physics
      Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE