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Tytuł artykułu

Heterogeneous radiolysis of urea. Implications in astrobiology and prebiotic chemistry

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
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.
EN
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
13
Numer
1
Opis fizyczny
Daty
otrzymano
2014-02-28
zaakceptowano
2014-05-25
online
2014-11-26
Twórcy
  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, C.P. 04510, México D.F., México
  • Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, México, D.F. C.P. 04510 México
  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, C.P. 04510, México D.F., México
  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, C.P. 04510, México D.F., México
  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, C.P. 04510, México D.F., México
Bibliografia
  • [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)
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  • [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
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  • [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
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_chem-2015-0016
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