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Full-Text Articles in Physical Sciences and Mathematics
Solid State 13C Nmr And Thermal Analysis Of Conformational Motion And Disorder In Small And Large Molecules, Jinlong Cheng
Solid State 13C Nmr And Thermal Analysis Of Conformational Motion And Disorder In Small And Large Molecules, Jinlong Cheng
Doctoral Dissertations
In this work it is attempted to explore the conformational motion and disorder through a large number of examples of molecular systems differing in shape, rigidity, and molecular weight: a series of tetra-n-alkylammonium bromides and iodides, a liquid-crystal-forming molecule, N,N'-bis(4-n-octyloxybenzal)-1,4-phenylenediamine (OOBPD), and polymers, poly[oxy-1,4-(3-methylphenylene)ethylene-1,4-phenyleneoxynonamethylene] (MBPE-9) and poly[oxy-1,4-(3-methylphenylene)ethylene-1,4-phenyleneoxypentamethylene] (MPBE-5). The techniques used to study the conformational motion and disorder are mainly solid state 13C nuclear magnetic resonance (NMR) spectroscopy and thermal analysis.
The results of this work show that conformational disordered states (condis crystals) exist indeed in these molecules containing flexible chemical bonds (single …
Constrained Completion: Theory, Implementation, And Results, Daniel Patrick Murphy
Constrained Completion: Theory, Implementation, And Results, Daniel Patrick Murphy
Doctoral Dissertations
"The Knuth-Bendix completion procedure produces complete sets of reductions but can not handle certain rewrite rules such as commutativity. In order to handle such theories, completion procedure were created to find complete sets of reductions modulo an equational theory. The major problem with this method is that it requires a specialized unification algorithm for the equational theory. Although this method works well when such an algorithm exists, these algorithms are not always available and thus alternative methods are needed to attack problems. A way of doing this is to use a completion procedure which finds complete sets of constrained reductions. …
Atomic Collision Processes Of Interest In Controlled Thermonuclear Fusion Research, Victor Dewitt Irby
Atomic Collision Processes Of Interest In Controlled Thermonuclear Fusion Research, Victor Dewitt Irby
Doctoral Dissertations
"This thesis examines several atomic collisional processes involved in controlled thermonuclear fusion. Specifically, experimental studies have been made on the state- selective single capture reaction
3He2+ + He —> 3He+(n) + He+(n'), (1)
on the double capture reaction
3He2+ + H e—> 3He + He2+ , (2)
and on the single ionization of atomic targets X
Aq+ + X —> Aq+ + X+ + e- (3)
by charged projectiles Aq+. Reactions (1) and (2) have an importance in plasma energy balance and in …