Adsorption of nucleic acid bases on magnesium oxide (MgO)
| Autor: | Teresa Fornaro, Sergio Branciamore, Amaranta Pucci, John Robert Brucato |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Langmuir
Physics and Astronomy (miscellaneous) Magnesium Inorganic chemistry chemistry.chemical_element Uracil Nucleobase Metal chemistry.chemical_compound Adsorption chemistry Space and Planetary Science Desorption visual_art Monolayer Earth and Planetary Sciences (miscellaneous) visual_art.visual_art_medium Ecology Evolution Behavior and Systematics |
| Zdroj: | International Journal of Astrobiology. 12:78-86 |
| ISSN: | 1475-3006 1473-5504 |
| DOI: | 10.1017/s1473550412000444 |
| Popis: | The adsorption of organic molecules on mineral matrices might have played a fundamental role in processes that led to the emergence of life. We investigated the adsorption properties of the nucleobases adenine, cytosine, uracil and hypoxanthine on magnesium oxide (MgO), determining the single solute batch equilibrium adsorption isotherms. Langmuir-type isotherms were fitted to data, assuming a rapid reversible equilibration of adsorption, demonstrated effectively through desorption experiments. The Langmuir equilibrium adsorption constantKand the amount of the solute per unit of adsorbent mass necessary to complete the monolayerbwere calculated. The results indicate that MgO is a good adsorbent for nucleobases (adenine > uracil > hypoxantine > cytosine), suggesting a role of metal oxides in concentrating biomolecules in prebiotic conditions that might have favoured the passage from geochemistry to biochemistry. |
| Databáze: | OpenAIRE |
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