Accession Number : AD0702729

Title :   EXPOSURE OF Escherichia coli TO LOW-FREQUENCY VIBRATIONS,

Corporate Author : NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Personal Author(s) : Beischer,Dietrich E. ; Cowart,Glenda S.

Report Date : JAN 1970

Pagination or Media Count : 18

Abstract : The assumption has been made that low-frequency vibration as experienced in air and space vehicles may increase the genetic load. This hypothesis was tested by studying the effects of vibration on the formation of biochemical mutants in Escherichia coli. No significant differences from unvibrated controls were observed either in growth or in number and kind of nutritionally dependent cells arising in E. coli vibrated at frequencies from 20 to 100 Hz. Exposure times varied from 5 to 60 minutes, and accelerations from 5 to 20 G. The experiments demonstrate that the single linkage chromosome structure of the protokaryotic E. coli is mechanically stable enough to withstand the mechanical forces of vibration within the limits used. (Author)

Descriptors :   (*ESCHERICHIA COLI, VIBRATION), (*GENETICS, ESCHERICHIA COLI), (*SPACE FLIGHT, GENETICS), MUTATIONS, ACCELERATION TOLERANCE, BACTERIA, GROWTH(PHYSIOLOGY)

Subject Categories : Stress Physiology
      Microbiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE