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.
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Showing 1 to 20 of 192 for “"alpha-beta"”.
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Beta'-Lithiation of Alpha, Beta-Unsaturated Amides
The novel (beta)'-lithiation of (alpha)-alkyl-(alpha),(beta)-unsaturated secondary and tertiary amides is reported. N-Methyl-1-cyclohexenecarboxamide and N-methyl-1-cyclopentenecarboxamide are metalated at nitrogen and at the (beta)'-carbon with either sec-butyllithium/TMEDA at -78(DEGREES)C or …
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Mathematical Models of the Alpha-Beta Phase Transition of Quartz
… to compare the sequence of transitions with the alpha-inc-beta phase transition of quartz. We examine a model by Parlinski which employs interactions of nearest and next-nearest neighbor atoms. We numerically determine the configurations which lead to minimum energy for a range of parameters. We …
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Molecular Considerations In The Design Of Novel Alpha/Beta Hydrolase Inhibitors
Alpha/beta hydrolases (ABHs) are a superfamily of hydrolytic enzymes that process a wide variety of substrates. A subfamily of ABHs called carboxylesterases (CEs) are important enzymes that catalyze biological detoxification, hydrolysis of certain pesticides, and metabolism of many esterified …
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Dendritic Cells Mediate the Dual Effects of IFN alpha/beta in HCV Immunity
<p>Hepatitis C virus (HCV) infects an estimated 170 million people and is responsible for considerable morbidity and mortality worldwide. Successful resolution of infection is achieved naturally in approximately 30% of infected individuals and correlates with a strong T cell response. Furthermore, …
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The Conjugate Addition of Tert-Butylmagnesium Chloride to Cinnamaldehyde and (alpha,beta,beta)-Triphenylacrylophenone
Made available in DSpace on 2014-12-05T19:36:06Z (GMT). No. of bitstreams: 1 0010499.pdf: 2579209 bytes, checksum: 2516bb918e9ae0fefbae2cbb360eb855 (MD5) Previous issue date: 1954
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Crystallographic, Morphological and Kinetic Studies of the Alpha-Beta Transformation in the Niobium-Hydrogen System
The group VB bcc metal-hydrogen systems have been extensively studied in the last few years. These studies are relevant to nuclear-reactor technology, superconductivity, and energy storage devices. The elements nitrogen and hydrogen form interstitial solid solutions with the group VB bcc metals and …
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Intramolecular (4+2) -Cycloadditions of Three Heterodienes: Nitrosoalkenes, Nitroalkenes, and Z-Alpha,beta-Unsaturated Aldehydes
… employing nitrosoalkenes, nitroalkenes, and Z -$\alpha,\beta$-unsaturated aldehydes as the 4$\pi$-components are discussed. Nitrosoalkenes, generated in situ from the corresponding $\alpha$-chloroketone silyloximes, engaged in intramolecular cycloadditions with enol ethers and vinyl sulfides at …
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Some Effects of the Gametocide, Sodium (alpha,beta)-Dichloroisobutyrate, on Soybeans, Glycine Max (L.) Merrill
Made available in DSpace on 2014-12-10T17:12:21Z (GMT). No. of bitstreams: 1 6500920.pdf: 4110861 bytes, checksum: a33602041f2b11df0a775bca55fc51f5 (MD5) Previous issue date: 1964
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Developmental Alterations to the Alpha-Beta Neural Oscillations Underlying Verbal Working Memory Function in Children and Adolescents
… oscillatory activity, specifically within the alpha-beta frequency range (~8-18 Hz), that supports WM encoding and maintenance processes in children and adolescents. This study also aimed to understand how the development of WM-related oscillatory dynamics is related to cognition in a broader …
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Synthesis of Single Isomer Trisubstituted Olefins from beta-chloro-alpha-iodo-alpha, beta-Unsaturated Esters and Alkynyl Esters
… disclosed. A unique olefin template such as (E)-beta-chloro-alpha-iodo-alpha,beta-unsaturated esters cross-couple with 9-alkyl-9-BBN to produce single isomer trisubstituted olefins using palladium-catalyzed Suzuki-Miyaura cross-coupling reaction. This methodology can be further expanded to …
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Selective hydrogenation of α,β[alpha,beta]-unsaturated aldehydes towards clean synthesis over noble metal catalysts in mass transfer efficient three phase reactors
The hydrodynamics and mass transfer characteristics of a concurrent downflow contactor (CDC) are studied in this work in order to investigate the viability of this bubble column as a catalytic reactor for the hydrogenation of α,β-unsaturated aldehydes. Oxygen/water was used as the system …
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A facile conversion of beta-keto carbonyl compounds to alpha, beta-unsaturated-gamma-oxo carbonyl systems and a study of ketal -derived oxonium ylides
… efficient method for the conversion of versatile beta-keto carbonyl compounds to the corresponding alpha,beta-unsaturated-gamma-oxo carbonyl structural units was developed. This methodology was applied to beta-keto esters, amides and lactones. In most cases generation of the olefinic functionality …
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Tail Asymptotics for the Limiting Distribution of Theta Sums
… to be exponential sums of the form S_{N}(x; \alpha, \beta) := \sum_{n =1}^{N} e((\tfrac{1}{2} n^2 + \beta n)x + \alpha n), where e(z) = e^{2 \pi i z}. If \alpha and \beta are fixed rational numbers, and x is chosen randomly from the unit interval, we use homogeneous dynamics to show that …
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Efficient Computation of Cohesive Subgraphs in Uncertain Bipartite Graphs
… graphs. In this thesis, we propose the (\alpha,\beta,\eta)-core model, which is the first cohesive subgraph model on uncertain bipartite graphs. To capture the uncertainty of relationships/edges, \eta-degree is adopted to measure the vertex engagement level, which is the largest integer k …
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Challenging the Rigor of Alpha/Beta and Relative Biological Effectiveness in Tumor Contorl [sic] Probability Determinations via In Silico Modeling That Incorporates Individualized Biological and Physiological Data
BACKGROUND: Current methods for predicting the response of tumors to radiation therapy focus largely on linear quadratic (LQ) model survival parameters generated from conventional radiotherapy regimens, of ~2 Gy/fraction. The accuracy of the LQ model has been questioned for high dose per fraction …
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