Origins of life and evolution of the biosphere

, Volume 19, Issue 2, pp 109–118

The γ-irradiation of aqueous solutions of urea. Implications for chemical evolution

Authors

  • R. Navarro-González
    • Instituto de Ciencias NuclearesU.N.A.M., Circuito Exterior, C.U.
  • A. Negrón-Mendoza
    • Instituto de Ciencias NuclearesU.N.A.M., Circuito Exterior, C.U.
  • E. Chacón
    • Instituto de Ciencias NuclearesU.N.A.M., Circuito Exterior, C.U.
Article

DOI: 10.1007/BF01808145

Cite this article as:
Navarro-González, R., Negrón-Mendoza, A. & Chacón, E. Origins Life Evol Biosphere (1989) 19: 109. doi:10.1007/BF01808145

Abstract

0.05 mole dm−3, O2-free aqueous solutions of urea were studies after receiving various doses of60Co gamma rays (0.14–600 kGy). Urea was found to be relatively stable under radiation; its radiation chemical yield of decomposition was 0.47. Hydrogen (G=0.50), carbon dioxide (G=0.44), ammonia (G=0.22), oxalic acid (G=0.0054), malonic acid (G=0.000064) and three unidentified oligomers were found to be the main radiolytic products. The origin of these products is explained by free radical reactions initiated by the transients from water radiolysis (H·,·OH,eaq).

Copyright information

© Kluwer Academic Publishers 1989