77,709 research outputs found
ENERGETICS AND DYNAMICS OF COMBUSTION INTERMEDIATES
No full textThis proposal describes a collaboration between the University of California, San Diego (UCSD) Department of Chemistry and Biochemistry (Continetti) and the Department of Chemistry at the Uni. Roma La Sapienza (Stranges) that will apply complementary state-of-the-art experimental techniques to understanding the energetics and dynamics of combustion intermediates. The chemistry of transient combustion intermediates is central to our understanding of the efficiency of fossil fuel combustion and its environmental impacts, including the formation of soot and other aerosols. At UCSD, pioneering work using negative ion precursors and fast beam translational spectroscopy has been carried out to characterize neutral alkoxy radicals and most recently the essential hydroxycarbonyl radical (HOCO), the intermediate in the fundamental reaction of OH + CO ⟶ H + CO2, using the technique of Photoelectron-Photofragment Coincidence (PPC) Spectroscopy. At La Sapienza, Prof. Stranges has established a state-of-the-art laboratory using Photofragment Translational Spectroscopy (PTS) with universal mass-spectrometric detection, and has made a number of important discoveries concerning the photochemistry of the allyl radical. This collaborative effort will be initiated with the visit of Professor Continetti to La Sapienza from January – May 2013, and will lay the foundation for further exchange of students and postdoctoral fellows as well as the PI’s, as time permits, in the future
Molecular Beam Studies of Hot Atom Chemical Reactions:Reactive Scattering of Energetic Deuterium Atoms
No full textCrossed Molecular Beams Study of the Reaction D + H2 → DH + H at Collision Energies of 0.53 and 1.01 eV
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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