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2015 | 13 | 1 |
Article title

Heterogeneous radiolysis of urea. Implications
in astrobiology and prebiotic chemistry

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Urea is an organic molecule present in most living organisms. Historically, it was the first organic molecule synthesized in the laboratory. In prebiotic chemistry, urea readily forms in different laboratory simulations using different energy sources. Furthermore, the role of solid surfaces, particularly minerals, might have been crucial to increase the complexity of the organic matter which may have led to the subsequent emergence of life on Earth. In this work, the radiolysis of urea in presence of a clay is studied to determine to what extent the mineral surfaces influence the decomposition of organics. The results indicate that urea is relatively stable to ionizing radiation in aqueous solutions and up to 20 kGy no decomposition is observed. Moreover, the presence of sodium montmorillonite, by a mechanism until now unknown, affects the radiolytic behavior and urea remains in the heterogeneous solution without a change in concentration even at very high doses (140 kGy). These results indicate that solids could have protected some organics, like urea, from degradation enabling them to remain in the environment on the primitive Earth.
Physical description
25 - 5 - 2014
26 - 11 - 2014
28 - 2 - 2014
  • [1] Wöhler F., Annalen der Physik und Chemie, 1828, 12, 253 (in German)[Crossref]
  • [2] Lehninger A.L., Bioquímica. Las bases moleculares de la estructura y función celular, Ediciones Omega, Barcelona, 1994 (in Spanish)
  • [3] Miller S.L., J. Am. Chem. Soc., 1955, 77, 2351[Crossref]
  • [4] Schlesinger G., Miller S.L., J. Molec. Evol., 1983, 19, 383
  • [5] Berger R., Proceed. Nat. Acad. Sci. USA, 1961, 47, 1434[Crossref]
  • [6] Palm C., Calvin M., J. Am. Chem. Soc., 1962, 84, 2115[Crossref]
  • [7] Dose K., Risi S., Biochemie, Biophysik, Biologie, 1968, 23b, 581
  • [8] Colín-García M., Negrón-Mendoza A., Ramos-Bernal S., Astrobiology, 2009, 9, 279[Crossref]
  • [9] Robertson M.P., Miller S.L., Nature, 1995, 375, 772
  • [10] Orgel L., Origins of Life and Evolution of the Biosphere, 2002, 32, 279
  • [11] Bernal J.D., The physical bases of life, Routlege and Keegan Paul, London, 1951
  • [12] Draganic I.G., Draganic Z.D., The radiation chemistry of water, Academic Press, New York, 1971
  • [13] Frisch M.J., Trucks G.W., Schlegel H.B., Scuseria G.E., Robb M.A., Cheeseman J.R., et al., Gaussian 03, Revision B.05, Gaussian Inc, Pittsburgh, PA, 2003
  • [14] Guzmán A., Negrón-Mendoza A., Ramos-Bernal S., Cell. Molec. Biology (Noisy-le-Grand, France), 2002, 48, 525
  • [15] Mortland M., Clay Minerals, 1966, 6, 143[Crossref]
  • [16] Long L.H., Zhang Y.T., Wang X.F., Cao Y.X., Applied Clay Science, 2009, 46, 57
  • [17] Said M.B., Plant and soil, 1972, 36, 239[Crossref]
  • [18] Navarro-Gonzalez R., Negron-Mendoza A., Chacon E., Origins of life and Evolution of the Biosphere, 1989, 19, 109
  • [19] Ainsbury E.A., Bakhanova E., Barquinero J.F., Brai M., Chumak V., Correcher V., et al., Radiation protection dosimetry, 2011, 147, 573
  • [20] Eissa N.A., Sheta N.H., Meligy W.M.E., Sallam H.A., Hyperfine Interact, 1994, 91, 783 [Crossref]
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