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Induction of Lysogenic Bacteria in the Space Environment (P-1135)
Principal Investigator
Research Area:
Cell and molecular biology
Radiation biology
Species Studied
Scientific Name: Salmonella typhimurium Species: Bacterium


This study was to test the hypothesis that weightlessness both with or without gamma irradiation would not affect bacterial cell growth or induction of bacterial prophage P-22. The experiment was designed to test the effects of: 1) space flight; 2) three chronic gamma-irradiation dose levels; and 3) temperature.

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Mattoni, R.H.T. et al.: Induction of Lysogenic Bacteria in the Space Environment. BIOSPEX: Biological Space Experiments, NASA TM-58217, 1979, p. 165.

Mattoni, R.H.T. et al.: Induction of Lysogenic Bacteria in the Space Environment. The Experiments of Biosatellite II, NASA SP-204, 1971, pp. 309-324.

Mattoni, R.H.T.: Effects of Spaceflight and Radiation on Growth and Induction of Lysogenic Bacteria. Radiation Research, vol. 35, 1968, p. 499.

Mattoni, R.H.T.: Space-Flight Effects and Gamma Radiation Interaction on Growth and Induction of Lysogenic Bacteria, A Preliminary Report. Bioscience, vol. 18, no. 6, 1968, pp. 602-608.

Culture media
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Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Colony forming units (CFU)
Density, Bacteria, Coulter counter, colony counts (number)
Density, Bacteriophage, Microscopy (plaque count)
Growth rate: bacteria
Growth, culture, Salmonella, suspension, Coulter counter, total, viable
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Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Biosatellite II 09/07/1967 09/09/1967 2 days

Additional Information
Managing NASA Center
Ames Research Center (ARC)
Responsible NASA Representative
Ames Research Center LSDA Level 3
Project Manager: Helen Stewart
Institutional Support
National Aeronautics and Space Administration (NASA)
Alternate Experiment Name
Protocol / Approach