Thermodynamic parameters of water related properties of amino acids at low temperature ranges

Marcello G. Cacace, Alfonso Sada, Andras Dér, Jeremy J. Ramsden, Piergiuseppe Falciani, Rita Pallini

Research output: Conference article


We have developed a method to measure thermodynamic parameters of partition coefficients for relevant low molecular weight precursors, such as the naturally occurring amino acids. The experimental set up allows the determination of Kd of relevant solutes in conditions akin to gel permeation chromatography experiments. This information is useful to ascertain the characteristics of the interaction of these molecules with organized, structured water layers, such as the ice surface of interstellar dust or comets. The ranking of the temperature dependence of such interactions is not related to their hydrophilic-hydrophobic character but gives rise to an unique experimentally derived scale for the twenty naturally occurring amino acids. This information may well contribute to our understanding of the chemistry and physics of biochemical compounds at surfaces and at temperatures corresponding to extreme environments.

Original languageEnglish
Pages (from-to)437-438
Number of pages2
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number518
Publication statusPublished - szept. 1 2002
EventProceedings of the Second European Workshop on Exo-Astrobiology - Graz, Austria
Duration: szept. 16 2002szept. 19 2002

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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