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

摘要

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 experimentsform a contribution in the laboratory simulation of the solar irradiation on the building blocks of lifewith regard to the origin of life. Results are presented showing the photodecomposition of tyrosine andglycine-tyrosine, at different concentrations, against UV doses. The analysis of the irradiated solutionsis carried out by spectroscopic and analytical techniques. The findings of our laboratory simulations areused to constrain the early stages of the life emerging process.