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- Title
Adsorption of Adenine and Thymine on Zeolites: FT-IR and EPR Spectroscopy and X-Ray Diffractometry and SEM Studies.
- Authors
Baú, João; Carneiro, Cristine; Souza Junior, Ivan; Souza, Cláudio; Costa, Antonio; Mauro, Eduardo; Zaia, Cássia; Coronas, Joaquin; Casado, Clara; Santana, Henrique; Zaia, Dimas
- Abstract
The interactions of adenine and thymine with and adsorption on zeolites were studied using different techniques. There were two main findings. First, as shown by X-ray diffractometry, thymine increased the decomposition of the zeolites (Y, ZSM-5) while adenine prevented it. Second, zeolite Y adsorbed almost the same amount of adenine and thymine, thus both nucleic acid bases could be protected from hydrolysis and UV radiation and could be available for molecular evolution. The X-ray diffractometry and SEM showed that artificial seawater almost dissolved zeolite A. The adsorption of adenine on ZSM-5 zeolite was higher than that of thymine (Student-Newman-Keuls test-SNK p < 0.05). Adenine was also more greatly adsorbed on ZSM-5 zeolite, when compared to other zeolites (SNK p < 0.05). However the adsorption of thymine on different zeolites was not statistically different (SNK p > 0.05). The adsorption of adenine and thymine on zeolites did not depend on pore size or Si/Al ratio and it was not explained only by electrostatic forces; rather van der Waals interactions should also be considered.
- Subjects
X-ray diffraction; THYMINE; ZEOLITES; ADENINE; NUCLEIC acids
- Publication
Origins of Life & Evolution of the Biosphere, 2012, Vol 42, Issue 1, p19
- ISSN
0169-6149
- Publication type
Article
- DOI
10.1007/s11084-011-9246-1