http://www.cnr.it/ontology/cnr/individuo/prodotto/ID127897
Origin of life: interplay between mineral matrices and organics ? (Abstract/Poster in atti di convegno)
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- Origin of life: interplay between mineral matrices and organics ? (Abstract/Poster in atti di convegno) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
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Pucci A., Branciamore S., DAcqui L. P., Gallori E. (2010)
Origin of life: interplay between mineral matrices and organics ?
in EGU General Assembly 2010
(literal)
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- Pucci A., Branciamore S., DAcqui L. P., Gallori E. (literal)
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- The RNA worlds concept encounters significant difficulties: RNA is chemically fragile and difficult to synthesize abiotically. The known range of its catalytic activities is rather narrow, and the origin of an RNA synthetic apparatus is unclear (Shaphiro 1999). However the presence of specific physical settings, in particular clay minerals, could have furnished a primordial compartimentalization and a protected environment during abiotic evolution overcoming the obstacle regarding the half-lives for the decomposition of the nucleobases, especially for cytosine (the half-life for deamination at 25°C is 340 yr), too short on the geologic time scale to allow an adequate accumulation of this compounds (Levy and Miller, 1998). In this work we study the fate of cytosine in a prebiotic scenario at high temperature (448 K). The cytosine-clay system exposed to high temperature for different period of time was followed by using FTIR-DRIFT spectroscopy, X-ray diffraction. The possibility to study the kinetics of degradation of cytosine in the presence of minerals have led us a better understanding in the interplay between mineral matrices and organics in the contest of the origin of life.
Levy M, Miller S. L. (1998) The stability of the RNA bases: Implications for the origin of life, PNAS,7933-7938Shaphiro R. (1999) Prebiotic cytosine synthesis: A critical analysis and implications for the origin of life, PNAS, 43964401 (literal)
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- Origin of life: interplay between mineral matrices and organics ? (literal)
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