title: Analysis of water in Autonomous Biological Systems (ABS) samples.
abstract: Several soluble components, peptidase and amino acids, and carbon isotopic ratio in the water retrieved from flight experiments of Autonomous Biological Systems (ABS) as well as ground control samples are analyzed to interpret the condition, dynamics, material balance of the ABS ecosystems. Organic carbons in flight samples were found to be more abundant compared with the control ones, which suggested the uniform ecosystems in low gravity might easily dissolve more soluble components. The Mir-1997 flight sample showed higher C/N ratio probably because of the dissolution of carbon-rich plant materials.
authors.affiliation: Obayashi Corporation, Tokyo, Japan. yojiishi@tri.obayashi.co.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: K
authors.initials: K
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Seki
authors.forename: H
authors.initials: H
authors.lastname: Mizutani
authors.forename: Y
authors.initials: Y
authors.lastname: Kawasaki
authors.forename: J
authors.initials: J
authors.lastname: Koike
authors.forename: K
authors.initials: K
authors.lastname: Ijiri
authors.forename: M
authors.initials: M
authors.lastname: Yamashita
authors.forename: K
authors.initials: K
authors.lastname: Sugiura
authors.forename: J
authors.initials: J
authors.lastname: Poynter
authors.forename: T
authors.initials: T
authors.lastname: MacCallum
authors.forename: G
authors.initials: G
authors.lastname: Anderson
mesh_terms: D000469:Alkaline Phosphatase / Q000032:analysis / Q000378:metabolism; D000596:Amino Acids / Q000032:analysis; D017756:Aquaculture; D002244:Carbon / Q000032:analysis; D002247:Carbon Isotopes; D018504:Ecological Systems, Closed; D017753:Ecosystem; D010450:Endopeptidases / Q000032:analysis / Q000378:metabolism; D008021:Life Support Systems; D013026:Space Flight / Q000295:instrumentation*; D014732:Vibration; D014867:Water / Q000032:analysis* / Q000737:chemistry; D014893:Weightlessness
chemical_list: D000596:Amino Acids; D002247:Carbon Isotopes; D014867:Water; D002244:Carbon; D000469:Alkaline Phosphatase; D010450:Endopeptidases