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 266 for “"Chemists"”.
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Characteristics of the Scientific Literature Cited by Chemists of the Soviet Union
Made available in DSpace on 2014-12-08T22:49:17Z (GMT). No. of bitstreams: 1 6607706.pdf: 11435463 bytes, checksum: 0ad47b3c914b6e77bb7e9a2c57e04c97 (MD5) Previous issue date: 1966
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Electronic Preprint Distribution: a Case Study of Physicists and Chemists at the University of Maryland
… world. This case study of twelve physicists and chemists at the University of Maryland reveals divergent attitudes and behaviors about preliminary electronic dissemination of research. Several hypotheses including economic considerations, historical and technical patterns of work, social and …
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Instruments and Domains of Knowledge: The Case of Nuclear Magnetic Resonance Spectroscopy, 1956-1969
… the year 1956 to 1969 to understand how organic chemists and Varian Associates?the makers of the first commercial NMR spectrometers?negotiated the identity of the NMR spectrometer. The work of the organic chemists was examined through their publications in the JOC. Examining the abstracts from …
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Calculation of thermodynamic and kinetic properties using semi- empirical quantum codes
… the subject of major interest for organic chemists and quantum chemists. In this thesis numerous exercises are designed in order to explore various areas of chemical engineering where these quantum chemical software might be successfully utilized. In this sense, the following attempt is a …
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ESIPT-Enabled Alkyne Migration Provides Rapid Access to Benzoxazinones
… to agrochemical scientists and medicinal chemists because of their widespread biological activity. These scaffolds are also of interest to synthetic chemists, who recognize the utility of benzoxazinones for accessing functionalized heterocycles. The use of efavirenz, a benzoxazinone-based …
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The Physico-chemical Nature of the Chemical Bond: Valence Bonding and the Path of Physico-chemical Emergence
… a broad interdisciplinary framework in which chemists and physicists could make contributions to problems of common value. It is here argued that evolving disciplinary factors such as physical and chemical responses to the atomic hypothesis, the nature of disciplinary formation in Germany and …
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Machine Learning Methods for Modeling Synthesizable Molecules
… new machine learning (ML) methods to augment chemists in the design and make steps of this process, focusing on the tasks of (a) how to use ML to predict chemical reaction outcomes, and (b) how to build generative models to search for new molecules. We take a common approach to both tasks, …
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Studies on the synthesis of cyclohexynes for inter- and intramolecular cycloaddition reactions
… cycloalkynes have been of interest to organic chemists for many years due to their exotic structure and their potential utility as synthetic building blocks. This thesis examines the generation of cyclohexyne derivatives and their reactivity in inter- and intramolecular cycloadditions. Several …
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Model Compounds for the Photoactivation of Glycosyl Donors
… in many different forms. Carbohydrate chemists still face many challenges in the synthesis of these complex substrates. This project aims to offer carbohydrate chemists a novel way of activating the anomeric position of a sugar by light to promote glycosylation. This involved …
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Synthesis of fluoromodified carbon rich electron acceptors and exploration of their structural, electronic, and device properties
… of these materials by physicists, biochemists, materials scientists, medicinal chemists, and most significantly for this work, organic electronics chemists. By adding powerful electron-withdrawing groups, the electron acceptor and solid-state structural properties of carbon rich …
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The selective separation and extraction of metals using membrane technology
… and Fe(III) has been a problem that has vexed chemists for many years. Separation has been difficult because of the very similar chemical properties of these transition metals that are situated alongside each other in the Periodic Table. The work contained in this thesis shows the membrane …
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Molecular Similarity and Xenobiotic Metabolism
… faster predictions, for the first time enabling chemists to explore the effects of structural modifications on a compound’s metabolism in a highly responsive and interactive manner.
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Chloroform anaesthesia
As far back as 1796 a group of Dutch chemists produced a dense oily liquid. This was probably ethylene dichloride (CH2C1)2 and it was known as Dutch liquid or chloric ether, remaining for many years a chemical curiosity. Professor Benjamin Silliman, in his Yale College Elements of Chemistry, dated …
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Exploration of Chemical and Biochemical Mechanisms of Catalysis
… of otherwise inaccessible reaction pathways, chemists have long looked to nature for inspiration. The functionalization of C–H bonds is one such area of research, where the coveted exploitation of readily available hydrocarbon feedstock is impeded by the stability of the bonds. In this search …
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Exploration of Chemical and Biochemical Mechanisms of Catalysis
… of otherwise inaccessible reaction pathways, chemists have long looked to nature for inspiration. The functionalization of C–H bonds is one such area of research, where the coveted exploitation of readily available hydrocarbon feedstock is impeded by the stability of the bonds. In this search …
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Thermo-responsive Graft Copolymers based on Poly(Methyl Vinyl Ether): from Synthesis to Evaluation
… systems. We expect that our work could help chemists as well as non-chemists to develop new applications which could be reliably utilized in real life application.
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Control of selectivity in palladium-catalysed cross-coupling reactions using a sulfonated phosphine ligand
… This prevalence in nature has inspired chemists to adapt these interactions to control selectivity in small molecule catalysis. This thesis describes efforts towards utilising non-covalent interactions to influence site-selectivity and enantioselectivity during palladium-catalysed …
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Carbon-Carbon Bonds Formed by Lewis Acid Catalysis or Photoactivation
… bonds are of great interest to synthetic organic chemists. Ideally, these reactions will be simple, robust, and catalytic. Herein is described the synthesis of tertiary and all-carbon quaternary centers from propargylic alcohols, organoboronates, and Lewis acids. Lewis acids can also be used to …
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The Civil War Diet
… two and examining the influence of physicians, chemists, and health reformers on the Civil War diet.
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