title: Radiation and thermal stabilities of adenine nucleotides.
abstract: We have investigated in detail radiation and thermal stabilities and transformations of adenosine mono- and triphosphates in liquid and frozen solid aqueous solutions within a wide range of absorbed radiation dose (up to 75 kGy) and temperature (up to 160 degrees C).  Dephosphorylation is the main pathway of high temperature hydrolysis of adenine nucleotides.  Basic thermodynamic and kinetic parameters of this process have been determined.  Radiolysis of investigated compounds at room temperature results in scission of N-glycosidic bond with a radiation yield about of 1 mol/100 eV.  Solution freezing significantly enhances radiation stability of nucleotides as well as other biomolecules.  This circumstance is essential in the discussion of panspermia concepts.
authors.affiliation: Institute of Molecular Genetics of Russian Academy of Sciences, Moscow.
authors.forename: V V
authors.initials: VV
authors.lastname: Demidov
authors.forename: V N
authors.initials: VN
authors.lastname: Potaman
authors.forename: I P
authors.initials: IP
authors.lastname: Solyanina
authors.forename: V I
authors.initials: VI
authors.lastname: Trofimov
mesh_terms: D000227:Adenine Nucleotides / Q000737:chemistry* / Q000528:radiation effects; D000249:Adenosine Monophosphate / Q000737:chemistry / Q000528:radiation effects*; D000255:Adenosine Triphosphate / Q000737:chemistry / Q000528:radiation effects*; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D019418:Evolution, Chemical; D005720:Gamma Rays; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D011854:Radiochemistry
chemical_list: D000227:Adenine Nucleotides; D000249:Adenosine Monophosphate; D000255:Adenosine Triphosphate