Surface Interaction of Adenine on Montmorillonite Clay In Presence And Absence of Divalent Cations In Relevance To Chemical Evolution
Kavita Gururani, Chandra Kala Pant, Hari Datt Pathak
Key words: Adsorption, Biomonomers, Chemical evolution,Divalent Langmuir coefficients, Montmorillonite.,Oligomerisation
Abstract: Bernal suggested that clays might have played a significant role in primitive earth through the process of concentration and adsorption of the biologically formed biomonomers and thus protecting them against hydrolytic fission.Adsorption of adenine was studied in presence of montmorillonite clay with or without cations Ca2+,Cu2+,Mg2+.Studies carried out have shown that adsorption of adenine was dependent on pH and shows Langmuir adsorption isotherm. Percent binding and values of Langmuir adsorption isotherm on montmorillonite clay with or without divalent cations show that adsorption trend largely depend on the nature of adsorbate and the adsorbent.
 Bernal, J.D.: (1951) The physical basis of Life Routledge and Kegan Paul, London
 Lahav, N., White, D and Chang, S.: (1978) Science, 201, 67-69.
 Paecht- Horowitz, M. and: (1988) Origins Life Evol. Biosphere 18, 359-387. Eirich, F.R.
 Ponnamperuma, C. And Mack, R,: (1965) Science, 148, 1221
 Kamalludin, Nath,M.and Sharma, A.: (1994)Origins of Life and evolution of biosphere,2.469-47.
 Ferris, J. P., Zamek, O.S. Altbuch,: (1974b) J.Molec. Evol. 3,301-309. A. M. and Freiman, H.
 Lahav, N., White, D and Chang, S.: (1978) Science, 201, 67-69
 Rode, B.M., Son, H.L.Suwanochot.Y.: (1999) The combination of salt induced peptide formation and Bujdak,J. reaction and clay catalysis: A way to higher peptides under primitive earth conditions. Origins Life Evol. Biosphere 29, 273-286
 Basiuk, V.A. & Sainz –Rojas, J.: (2001) Catalysis of peptide formation by inorganic oxides: High efficiency of alumina under mild conditions on the earth- like planets. Adv. Space Res. 27, 225-230
 Yanagawa, H. and Kobayashi, K.: (1985) J. Biochem., 97, 1521
 S. Kalra, C. K. Pant, H. D. Patha and M. S. Mehata: (2000) Ind. J. Biochem, Biophys, 37, 341-346.
 Ming Meng, Lorenzo Steivano, and Jean-Francois Lambert (2004) Adsorption and thermal condensation mechanism of amino acids on oxide supports. 1. Glycine on silica.Langmuir 20:914-923
 Zaia, D. A. M. : (2004) A review of adsorption of amino acids on minerals: was it important for origin of life? Amino acids 27,113-118
 White, D. H., and Erickson, J. C.: (1980) J. Mol. Evol. 17,19.
 Kunio Kuwamura, Hitoshi Takeya, Takao Kushibe (2009) Effect of condensation agents and minerals for oligopeptide formation under mild and hydrothermal conditions in related to chemical evolution of proteins. Advances in space research 44:267-275
 Pant, C. K., Hemlata, Pathak. H. D.: (2009) Heat-initiated prebiotic formation of peptides from and Mehata, M. S. glycine/ aspartic acid and glycine / valine in aqueous environment and clay suspension. International Journal of Astrobiology 8