Download or read book Theoretical Studies of the Reactions and Spectroscopy of Radical Species Relevant to Combustion Reactions and Diagnostics Progress Report 1 July 1991 15 March 1992 written by and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical Studies of the Reactions and Spectroscopy of Radical Species Relevant to Combustion Reactions and Diagnostics Progress Report 16 March 1992 15 March 1993 written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes work performed as part of Department of Energy grant DE-FGO2-91ER14189 during the period 16 March 1992--15 March 1993 and outlines directions for future research. During this period we have developed a new method for determining points on the surface of intersection of two potential energy surfaces corresponding to states of distinct spin-multiplicity. This approach allows any number of geometrical parameters to be fixed while the remainder are optimized to minimize the energy of the point on the crossing surface. This algorithm will significantly enhance our ability to characterize spin-forbidden electronically nonadiabatic processes.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Theoretical Studies of the Reactions and Spectroscopy of Radical Species Relevant to Combustion Reactions and Diagnostics written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes work performed as part of Department of Energy grant DE-FGO2-91ER14189 during the period 16 March 1992--15 March 1993 and outlines directions for future research. During this period we have developed a new method for determining points on the surface of intersection of two potential energy surfaces corresponding to states of distinct spin-multiplicity. This approach allows any number of geometrical parameters to be fixed while the remainder are optimized to minimize the energy of the point on the crossing surface. This algorithm will significantly enhance our ability to characterize spin-forbidden electronically nonadiabatic processes.

Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1832 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-08 with total page 1506 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Winter Waterfront Year round Use in Metropolitan Toronto written by Xenia Klinger and published by . This book was released on 1991 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock Tube Study of the Reactions of the Hydroxyl Radical with Combustion Species Progress Report June 1990 May 1991 written by and published by . This book was released on 1991 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reactions of OH radicals with hydrocarbons have received a great deal of attention in recent years because of these processes are principal steps in the oxidation of organic fuels -- whether occurring in combustion/propulsion systems, in the atmosphere, or elsewhere. Of the various radicals capable of attacking hydrocarbons, OH radicals are generally the most reactive, and their reactions directly yield water molecules, one of the major final oxidation products. In the atmosphere, the combined effect of the OH radical's reactivity and concentration make it the single species that determines the atmospheric lifetime of an organic substance. The principal goals of the kineticist in the field of oxidation chemistry are (1) to measure as many elementary reaction rate coefficients as are conveniently studied in the laboratory; and (2) to develop theoretical and/or semiempirical tools for extrapolating from measured rate coefficients to unmeasured ones. The latter step is necessary because of the sheer number of reactions of possible interest.

Download or read book The Chemical Dynamics and Kinetics of Small Radicals written by Kopin Liu and published by World Scientific. This book was released on 1996 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent progress in the chemistry of radicals. Developments include the growing use of lasers to generate radicals, the application of lasers to provide state, angular, polarization, energy and real-time resolution in kinetics and dynamics experiments, the development of theories for handling the reactions of radicals, and the simulation of the reaction dynamics of increasingly larger systems for direct comparison to experimental results. The book emphasizes the increasing interaction between experimental dynamics, kinetics and theory. It is appropriate for chemistry graduate students and researchers about to enter the field. However, the discussions of some topics progress to a more advanced level so that even an expert will find the book useful.

Download or read book Vidannja Akademi nauk URSR 1919 1967 written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactions of Atoms and Radicals in Pulsed Molecular Beams written by H. Reisler and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The final report describes studies of unimolecular reactions of transient species and radicals relevant to combustion processes. Specifically, the dynamics of predissociation of free radicals for which multiple pathways, including molecular rearrangements, compete. These small, prototypical, systems are amenable to treatment by high level theory, and close collaboration with theory continues to be a cornerstone of the program. The chemistry of hydroxyalkyl radicals is important in atmospheric and combustion environments, because cleavage of the C-H and O-H bonds is implicated in the reactions of several atoms and radicals with alcohols and alkanes. In particular, the hydroxymethyl radical affords many opportunities to study both isomerization and dissociation on the ground and excited potential energy surfaces. During this funding period, high vibrational levels of the ground electronic state of the hydroxymethyl radicals were accessed in two ways: (1) by using internal conversion from the lowest excited electronic state, the 3s Rydberg state; and (2) via direct vibrational excitation of the hydroxymethyl radical accessed by pumping OH overtones as ''bright'' states. In the former method, levels that are {approx} 3 eV above the H + formaldehyde asymptote are reached. In the latter, the region of the dissociation barrier is gradually approached from below, while examining the role of energy flow from OH overtones to other vibrational levels. The first task was to characterize the electronic absorption of the radical, in order to develop diagnostics and reach the ground state via excitation of the lowest-lying state, the 3s Rydberg state. To this end, excitations to the three lowest 3s and 3p Rydberg states were studied and the dissociation channels identified. These were predominantly O-H and C-H fission, while isomerization to the methoxy radical was not observed. Collaborations with theory identified the molecular dynamics on the excited electronic potential energy surfaces and how the ground state is reached via nonadiabatic transitions. Establishing the relevant dissociation and isomerization pathways on the ground electronic state requires studying energy flow patterns with increasing internal energy. Two energy regimes corresponding to distinct unimolecular dynamics were reached: (1) low energy spectroscopic studies of IR transitions in the region of the fundamental and first overtone of the OH-stretch, where intramolecular dynamics is likely to be weak and first manifested; (2) Studies of the region near the dissociation barrier, i.e. the third OH-stretch overtone, where dissociation occurs mostly by tunneling. The experimental approach relies on pulsed molecular beams, state-selective reactant preparation and product detection, and good resolution in both frequency and velocity domains. Radicals are prepared in molecular beams by using photoinitiated bimolecular reactions in a quartz tube attachment to the pulsed valve. Excitation is achieved using either overtone pumping of OH stretch vibrations, or excitation to an electrically excited state followed by radiationless transitions. Detection relies on time-of-flight methods with core sampling, which provide kinetic energy and angular distribution.

Download or read book Pamphlets on Employment Minnesota written by and published by . This book was released on 1900 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Our Common Future written by and published by . This book was released on 1990 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book How Tobacco Smoke Causes Disease written by United States. Public Health Service. Office of the Surgeon General and published by . This book was released on 2010 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report considers the biological and behavioral mechanisms that may underlie the pathogenicity of tobacco smoke. Many Surgeon General's reports have considered research findings on mechanisms in assessing the biological plausibility of associations observed in epidemiologic studies. Mechanisms of disease are important because they may provide plausibility, which is one of the guideline criteria for assessing evidence on causation. This report specifically reviews the evidence on the potential mechanisms by which smoking causes diseases and considers whether a mechanism is likely to be operative in the production of human disease by tobacco smoke. This evidence is relevant to understanding how smoking causes disease, to identifying those who may be particularly susceptible, and to assessing the potential risks of tobacco products.

Download or read book Toxicological Profile for Polycyclic Aromatic Hydrocarbons written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laser Diagnostics for Combustion Temperature and Species written by Alan C. Eckbreth and published by CRC Press. This book was released on 1996-10-10 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on spectroscopically-based, spatially-precise, laser techniques for temperature and chemical composition measurements in reacting and non-reacting flows, this book makes these powerful and important new tools in combustion research