QUANTITATIVE CONTENT OF MICROORGANISMS IN HIGH ATMOSPHERIC LAYERS,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 26, 1970
- Accession Number
- AD0703889
Entities
People
- Ya. G. Kishko
Organizations
- National Air and Space Intelligence Center