The composition (CO–N2–H2O) of used mixtures corresponded
to a cometary and/or meteoritic impact into the Earth’s early atmosphere (Babánková D. et al. 2006). A multiple-centimeter-sized fireball was created by focusing a click here single 85 J, 450 ps near-infrared laser pulse into the centre of a 15-L gas cell. The LIDB plasma chemical evolution was selleckchem investigated by optical emission spectroscopy (OES) with temporal resolution (Babánková D. et al. 2006). The chemical consequences of laser-produced plasma generation in a CO–N2–H2O mixture were investigated using high resolution Fourier transform infrared absorption spectroscopy (FTIR) and gas chromatography (GC) (Civiš S. et al. 2008). The reaction mechanism of CO2 formation was investigated using water selleck products isotopomer H2 18O. Acknowledgements This work was
financially supported by Grant Agency of the Czech Republic (grant No. 203/06/1278) and the Czech Ministry of Education (grants LC510, LC528 and LA08024). Babánková D., Civiš S., Juha L., Bittner M., Cihelka J., Pfeifer M., Skála J., Bartnik A., Fiedorowicz H, Mikolajczyk J., Šedivcová T. (2006). Optical and x-ray emission spectroscopy of high-power laser-induced dielectric breakdown in molecular gases and their mixtures. Journal of Physical Chemistry A, 110:12113–12120. Babánková D., Civiš S., Juha L. (2006). Chemical consequencies of laser-induced breakdown in molecular gases. Progress in Quantum Electronics, 30:75–88. Civiš S., Babánková D., Cihelka J., Sazama P., Juha L. Spectroscopic investigation of high-power laser-induced dielectric breakdown in
gas mixtures containing carbon monooxide. To appear in the Journal of Physical Chemistry A. E-mail: petr.kubelik@centrum.cz Dipeptide Formation from Leucine, Methionine and Arginine Under Primordial Earth Conditions Feng Li1,2, Daniel Fitz1, Bernd M. Rode1 1Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria; 2Department of Earth Sciences, University Carnitine dehydrogenase of Oxford, Parks Road, Oxford OX1 3PR, United Kingdom The Salt-Induced Peptide Formation (SIPF) reaction, discovered in the late 1980s (Schwendinger and Rode, 1989) and implemented through drying-and-wetting cycles with the help of divalent copper ions and sodium chloride in aqueous solution, has repeatedly shown to be a universal and feasible pathway for simple peptide formation under primordial earth conditions (Rode, 1999) and also casts light on the puzzle of the origin of biohomochirality especially in case of amino acids with aliphatic side chains (Fitz, et al. 2007). In the present work, three functionally interesting amino acids, namely, hydrophobic leucine, sulphur-containing methionine (Li, et al. 2008) and guanidine-capped arginine, were investigated with regard to their dipeptide yields and the catalytic effects of glycine, L- and D-histidines respectively.