Item – Thèses Canada

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Numéro d'OCLC
85832294
Auteur
Blagojevic, Voislav,1976-
Titre
Ions, biomolecules and catalysis : SIFTing for the origins of life.
Diplôme
Ph. D. -- York University, 2005
Éditeur
Ottawa : Library and Archives Canada = Bibliothèque et Archives Canada, [2006]
Description
3 microfiches
Notes
Includes bibliographical references.
Résumé
Experimental results in the areas of interstellar chemistry and gas-phase ionic catalysis are presented here. Syntheses of amino acids glycine and [beta]-alanine was accomplished by gas-phase ion/molecule reactions from precursors known to be present in the interstellar medium. These syntheses are correlated with the amino acid composition of certain classes of meteorites, some of which are rich in [beta]-alanine. The catalytic conversion of NOx with CO or H2 to N2 and CO2 or H2O has been achieved, using bare metal cations to catalyze the O-atom transport. A novel reaction of NO with the metal cations, that is second-order in NO, has been observed, proceeding via a surface-like mechanism. These results can be related to certain surfaces, where irregularities on the surface or metal cation exchange in the zeolite create isolated charged sites, enhancing the efficiency of catalysis. I believe that catalysis can play an important role in the interstellar chemistry. A model is presented for the synthesis of amino acids in the protosolar nebula, taking into account the variations in the amino acid content of different classes of meteorites.
ISBN
049411553X
9780494115534