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 22 for “"Chemical affinity"”.
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Variations on a theme: patterns of congruence and divergence among 18th century chemical affinity theories
The doctrine of affinity deserves to be recognised by historians of chemistry as the foundational basis of the discipline of chemistry as it was practiced in Britain during the 18th century. It attained this status through its crucial structural role in the pedagogy of the discipline. The …
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Geochemistry of the Sykesville diamictite in central Maryland: an investigation of clast-matrix activity during metamorphism with tectonic implications
… metacalcareous rocks. Sharp contacts and mineral chemical affinity between the matrix and pelitic schist and some felsic-gneiss clasts suggests that these inclusions were intrabasinally derived as first suggested by Fisher (1970). Zoned textures, compositional differences, and isotopic …
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Ultratrace Neurotransmitters SERS Sensing
… technique for ultrasensitive detection of chemicals and biomolecules. As the high sensitivity of SERS requires analytes to be in close contact with a plasmonic substrate, the detection of analyte molecules with low chemical affinity towards the substrate is thus limited, for example …
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Experimental and computational studies of receptor-mediated cell detachment in shear flow
… adhesion is generally presumed to be related to chemical affinity of receptor/ligand bonds, but no experimental study has been previously directed toward this issue. I investigate the dependence of receptor/ligand adhesion strength on bond affinity using a radial fluid flow chamber assay to …
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Supramolecular Nanostructures as Support Materials for Gold Nanoparticle Catalysts
… stabilization, which exhibits favorable surface chemical affinity to gold. We show that AuNPs are anchored on the surface of CysAA which can be evenly dispersed in solution, enabling quasi-homogeneous catalysis in aque- ous conditions. Furthermore, the high aspect-ratio of these nanostructures …
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The Application of Innovative High-Throughput Techniques to Serum Biomarker Discovery
… profiling strategies typically employ single chemical affinity beads or surfaces to decrease sample complexity of dynamic fluids like serum. However, most proteins, captured on a particular surface or bead, are not resolved in the lower mass range where mass spectrometers are most effective. …
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Magnetophoretic focusing on submicron particles dispersed in a polymer-stabilized magnetic fluid
… were designed and synthesized without any chemical affinity to the solute to be separated. They were prepared by coprecipitation of iron (II) and (III) ions to form magnetite, which is coated by a comb copolymer that serves two purposes: to limit growth of magnetite to about 10 nm and to …
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HYDROGEN STORAGE CHARACTERISTICS OF ZIRCONIUM((IRON-X)(CHROMIUM-1-X))(,2).
… Cr. This trend appears to be both electronic and chemical affinity dependent. Of these intermetallics, Zr (Fe(,0.75)Cr(,0.25))(,2) demonstrates the best overall energy storage characteristics, ie a relatively high sorption capacity (H/M = 1.0) and low stability ((DELTA)H = -25 kJ/mol H(,2)). This …
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The chemical work of Thomas Graham
… ultimately on inherent molecular motions. The chemical affinity of water for different substances connected his studies of acids and salts with the liquid state. His first chemical investigations of 1825 were concerned with the absorption of gases by liquids. Inspired by Faraday's liquefaction …
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Effects of milling methods, cooling strategies and end-mill coatings on machinability in high speed end-milling of Inconel- 718 using carbide end-mills
… high cutting forces, rapid tool wear and high chemical affinity with many cutting tools. Appropriate cooling strategies, milling methods, tool coatings and cutting speeds play important roles in addressing these problems. This research presents the results of the effects of end-milling methods …
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THE ROLE OF CORONAVIRUS - HOST CELL MEMBRANE INTERACTIONS DURING VIRAL ENTRY AS MEDIATED BY CONSERVED REGIONS OF THE FUSION PEPTIDE
… My dissertation addresses this gap by using biochemical and biophysical approaches to dissect the interactions between the FP and the host cell membrane. Specifically, I examine the functional role of two key residues: a hydrophobic phenylalanine and a conserved tyrosine. The first part of my …
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Development of New Cathodic Interlayers with Nano-Architectures for Lithium-Sulfur Batteries
… an electrospinning method, which allows the chemical adsorption of polysulfides throughout a robust conductive film. A significant enhancement in cycle stability and rate capability was achieved by incorporating this interlayer with a composite cathode of S/MWCNT. These results herald a new …
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Cucurbit[n]uril-engineered Nano-constructs for Molecular Sensing
… technique for ultrasensitive detection of chemicals and biomolecules. As the high sensitivity of SERS requires analytes to be in close contact with a plasmonic substrate, the detectionof analyte molecules with low chemical affinity towards the substrate is thus limited. Cucurbit[n]uril …
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Methods to Probe the Function of Modified Bases in DNA
… is focused on the development and utilisation of chemical and biological tools to probe the function of modified bases in DNA with specific exploration of the less well-studied T-modifications: 5-hmU, 5-fU and Base J. LCMS/MS techniques are first utilised to enable the accurate global …
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Geochemical characteristics and microbial diversity of CO2-rich mound springs of the Tierra Amarilla anticline, New Mexico
… water geochemistry, microbial heterogeneity, geochemical cycling, and paleohydrological longevity of a unique set of desert springs in north-central New Mexico. This series of travertine-depositing CO2-rich springs is located along the boundary zone between the Colorado Plateau and Rio Grande …
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The Provenance of Eocene Tuff Beds in the Fossil Butte Member of the Green River Formation of Wyoming: Relation to the Absaroka and Challis Volcanic Fields
… but have some mineral compositions with A-type chemical affinities; consequently we conclude that they were erupted from volcanoes within the Challis volcanic field. Compositions of Challis volcanic rocks may have important implications for the development of a slab window in western North …
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Geochemistry of igneous rocks from the southern coast belt plutonic complex, southwestern British Columbia
… Wrangellia), and 3) combinations of 1 and 2. Geochemical characteristics and magmatic differentiation of plutonic rocks from this transect in the southern CPC are further examined by mineralogy and chemical analysis.Based on petrography the calc-alkaline plutons are divided into two compositional …
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Experimental and theoretical study of carbon dioxide absorption into potassium carbonate solution promoted with enzyme
… emission into the environment. Currently, CO2 chemical absorption using monoethanolamine (MEA) as a solvent is the best available option for CO2 capture from flue gas streams. The issue with this technology is the high capture cost which ranges from $50/metric ton to $70/metric ton CO2 avoided. …
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Determination of the proton affinities of gas phase peptides by mass spectrometry and computational chemistry
… as expected. However, the measured proton affinity of the peptide with C-terminal lysine, Ac-AK, is substantially higher than that of the con·esponding peptide with N-terrninal lysine, Ac-KA, contrary to expectations. Proton affinities determined for these compounds using computational …
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