Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 39 for “"initial formation"”.
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Studies of Nucleophilic Substitution at Neutral Nitrogen
… nitrogen and an ionization process involving the initial formation of a nitrenium ion-pair which is subsequently attacked by the nucleophile.
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Kinetics and Mechanism of Syn, Alpha' Lithiation of Tertiary Benzamides
… copy indicates the reaction proceeds with rapid initial formation of tetrameric complexes followed by rate determining deprotonation. Model studies using N,N,N',N'-tetramethylethylenediamine (TMEDA)
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THE USE OF REPLICATION-DEFECTIVE ADENOVIRAL VECTORS FOR EXPRESSION OF PRIMORDIAL ATHEROGENIC LIPOPROTEINS IN MICE
… The molecular events associated with the initial formation of apoB-containing lipoproteins within the endoplasmic reticula of hepatic and intestinal cells are poorly understood. Earlier studies are consistent with a cotranslational lipid-desorption model that requires microsomal …
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Laboratory studies of the multiday oxidative aging of atmospheric organic aerosol
… experiments have generally focused on the initial formation of OA from volatile organic compounds (VOCs), but have neglected processes that can change the composition and loading of OA over longer timescales ("aging").
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A novel diazonium-sulfhydryl reaction in the inactivation of yeast alcohol dehydrogenase by diazotized 3-aminopyridine adenine dinucleotide
… p-aminobenzoic acid with cysteine indicated the initial formation of a diazomercaptide which can then decompose to yield the thioether.
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The geological record of oceanic crustal accretion and tectonism at slow-spreading ridges
… axis to -29 Ma crust on the ridge flank. This information was used to analyze the evolution of ocean crust from initial formation in the rift valley to degradation by aging processes on the ridge flank. Accumulation of sediments affects the seafloor morphological expression of ocean crustal …
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Petrological and geochronological constraints on the metamorphic evolution of high-pressure granulites and eclogites of the Snowbird tectonic zone, Canada
… constraints that yield important information about the metamorphic evolution of these unique rocks. The main discovery through these integrated studies is that the Snowbird tectonic zone records a significant Paleoproterozoic high-pressure metamorphism that was previously …
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Predicting the Air-Side Thermal -Hydraulic Performance Characteristics of Flat-Tube Louver-Fin Heat Exchangers Under Dry and Wet Conditions
… transfer performance depends on avoiding the initial formation of inter-louver bridges.
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Synthesis and Characterization of Sugar Derivatives as Functional Gelators
… because they provide a bottom-up approach to the formation of supramolecular architectures through self-assembly. Gelator molecules do so via the initial formation of a one-dimensional array of individual molecules bound non-covalently through forces such as: hydrogen bonds, electrostatic forces, …
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Superconducting nanowire single-photon detectors and sub-10-nm lithography
… the detector. This model showed that, beyond the initial formation of a photon-induced resistance across the nanowire, Joule heating results in the growth of the resistive segment. While simple, this model was useful in designing SNSPDs that reset more quickly, and also in explaining an …
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Xanthene/Benzoxanthene Dyes: Novel Synthetic Metholologies, Applications in Molecular Recognition, Cellular Imaging and the Design of a Tunable White (RGB) Light Emitter
… synthesis of xanthene dyes. It involves the initial formation of methylated carbinol intermediates, followed by demethylation and concomitant condensation. I successfully applied the methodology to the synthesis of hitherto unavailable type [a] and [b] benzoxanthene architectures. …
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Ou Ayisyen? The making of a Haitian diasporic community in Chicago, 1933-2010
This dissertation investigates the formation of the Haitian diaspora in Chicago over the twentieth century. Through original oral history interviews with key community leaders, analysis of Chicago-based newspapers, and previously unexamined organizational records, this is the first comprehensive …
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Development of the new yeast-based assays for prion properties
… prion protein PrP is responsible for prion formation in mammals, causing a series of fatal and incurable prion diseases. (1) We constructed, for the first time, a two-component system to phenotypically monitor the conformational status of PrP in the yeast cells. In this system, the prion …
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Synthesis of derivatives of 4H-cyclopenta[ def]phenanthren-4-one and development of synthetic strategies for the polycyclic aromatic hydrocarbons with carbon frameworks represented on the surface of C60
… a sequence of reactions presumably with an initial formation of the chlorinated benzoenyne-allene 58. Two cycles of a C2--C6 biradical cyclization reaction followed by a radical-radical coupling then afforded the formal [4+2] Diels-Alder cycloaddition adduct 60, which in turn underwent …
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A study of a coordinated path planning strategy for a fleet of unmanned surface ships in the presence of static obstacles
… is to enable the fleet to autonomously change an initial formation shape into a safer formation shape when the fleet of the ships faces with static obstacles. A core idea adopted for the proposed strategy was motivated by behaviours of school of fish in the ocean.;We assumed that the behaviours of …
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Phenyl and pentafluorophenyl substiuted 1, 3-dio-xolan 2, 4-diones
… studied with particular reference to polymer formation. The reactivity of the anhydrocarboxylates to weak nucleophiles such as alcohols may be adequately explained in terms of the steric and electronic effects associated with both the anhydrocarboxylate and the attacking nucleophile. The …
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Reactivity of a Low Valent Gallium Compound
… is demonstrated. DFT calculations suggested initial formation of adducts between substrates and NacNacGa=O followed by a C-H bond abstraction from the substrate. Similarly, a transient gallium imide NacNacGa=NSiMe3, generated from the reaction of NacNacGa with trimethylsilyl azide, is shown …
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The Sonochemistry of Some Metal Carbonyl Complexes (Iron, Chromium)
… of solutions produces accoustic cavitation; the formation, growth and violent collapse of gas bubbles in solution. During collapse of the bubbles, local temperatures of approximately 3300 K and pressures of approximately 300 atm may be produced. These high temperatures and pressures may give rise …
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Suprachiasmatic nuclei development: A characterization of transcription factors and the influence of retinal innervation and VIP signaling
… have been well studied, how the nuclei are initially specified and how the network develops is poorly understood. Herein, we seek to elucidate the genes and mechanisms involved in the specification and development of SCN neurons, the SCN network, and circadian function. We first identified …
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The Effect of Traumatic Brain Injury On Tau Pathology By A Potential Seeding Mechanism
… a structurally alternative intermediate conformation that is prone to aggregate having amyloidogenic properties. Formation of amyloids, such as tau aggregates, is proposed to follow a nucleation-polymerization model where misfolded, soluble oligomeric seeds can trigger native proteins to …
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