title: Integration of experiments for the detection of biological activity in extraterrestrial exploration.
abstract: Although many experiments have been suggested and described for the detection of biological activity in planetary exploration, each experiment has required its own sample for the detection of a specific phenomenon. An experimental design which could detect growth, catabolic and anabolic activity on a single sample is described. Growth is monitored in a liquid medium which is in contact with, and chemically influenced by, a relatively large sample. Catabolic activity is indicated by changes in the gas composition of the atmosphere above the sample. Anabolic activity is indicated by the appearance of reduced carbon compounds, from oxidized precursors, in the liquid medium.
authors.affiliation: Ames Research Center, National Aeronautics and Space Administration, Moffett Field, California, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Merek
authors.forename: V I
authors.initials: VI
authors.lastname: Oyama
mesh_terms: D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism; D003470:Culture Media; D018559:Exobiology / Q000379:methods*; D005118:Extraterrestrial Environment; D008697:Methane / Q000032:analysis / Q000378:metabolism; D009930:Organic Chemicals; D012987:Soil / Q000032:analysis; D013026:Space Flight / Q000295:instrumentation*
chemical_list: D003470:Culture Media; D009930:Organic Chemicals; D012987:Soil; D002245:Carbon Dioxide; D008697:Methane