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Laboratory simulation of ultraviolet irradiation from the Sun on amino acids. III. irradiation of glycine-tyrosine

Published online by Cambridge University Press:  15 January 2009

F. Scappini ,
M.L. Capobianco ,
F. Casadei  and
R. Zamboni
F. Scappini*
Affiliation:
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R., Via P. Gobetti, 101, 40129Bologna, Italy
M.L. Capobianco
Affiliation:
Istituto per la Sintesi Organica e la Fotoreattività del C.N.R., Via P. Gobetti, 101, 40129Bologna, Italy
F. Casadei
Affiliation:
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R., Via P. Gobetti, 101, 40129Bologna, Italy
R. Zamboni
Affiliation:
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R., Via P. Gobetti, 101, 40129Bologna, Italy
*
e-mail: F.Scappini@bo.ismn.cnr.it
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Abstract

The effects of near ultraviolet (UV) radiation on water solutions of tyrosine and glycine-tyrosine are investigated using a broadband xenon lamp in the region 200–800 nm. These experiments form a contribution in the laboratory simulation of the solar irradiation on the building blocks of life with regard to the origin of life. Results are presented showing the photodecomposition of tyrosine and glycine-tyrosine, at different concentrations, against UV doses. The analysis of the irradiated solutions is carried out by spectroscopic and analytical techniques. The findings of our laboratory simulations are used to constrain the early stages of the life emerging process.

Keywords

amino acidsastrobiologychemical evolutiondipeptidesorigin of lifeUV irradiation
Type
Research Article
Information
International Journal of Astrobiology , Volume 8 , Issue 2 , April 2009 , pp. 63 - 68
Copyright
Copyright © 2009 Cambridge University Press

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