title: Survivability and abiotic reactions of selected amino acids in different hydrothermal system simulators.
abstract: We tested the stability and reaction of several amino acids using hydrothermal system simulators: an autoclave and two kinds of flow reactors at 200-250 °C. This study generally showed that there is a variation in the individual amino acids survivability in the simulators. This is mainly attributed to the following factors; heat time, cold quenching exposure, metal ions and also silica. We observed that, in a rapid heating flow reactor, high aggregation and/or condensation of amino acids could occur even during a heat exposure of 2 min. We also monitored their stability in a reflow-type of simulator for 120 min at 20 min intervals. The non-hydrolyzed and hydrolyzed samples for this system showed a similar degradation only in the absence of metal ions.
authors.affiliation: Department of Chemistry and Biotechnology, Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan. kuhan-chandru-nw@ynu.ac.jp
authors.forename: Kuhan
authors.initials: K
authors.lastname: Chandru
authors.forename: Eiichi
authors.initials: E
authors.lastname: Imai
authors.forename: Takeo
authors.initials: T
authors.lastname: Kaneko
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Obayashi
authors.forename: Kensei
authors.initials: K
authors.lastname: Kobayashi
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D001671:Biochemistry / Q000295:instrumentation; D004867:Equipment Design; D006868:Hydrolysis; D007477:Ions / Q000737:chemistry; D012822:Silicon Dioxide; D013696:Temperature
chemical_list: D000596:Amino Acids; D007477:Ions; D012822:Silicon Dioxide