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 139 for “"Nuclear Magnetic Resonance (NMR) spectroscopy"”.
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Recombinant expression, purification and structural characterization of Saccharomyces cerevisiae RING finger domain using Nuclear Magnetic Resonance (NMR) spectroscopy
… biochemical characterization using a 1D proton NMR spectroscopy showed that S. cerevisiae RING finger protein is well folded and can be further worked upon. These results provide the baseline information for the structural determination of the S. cerevisiae RING finger domain for future studies.
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Biomarkers of cell stress and cell death detected by proton high resolution magic angle spinning (\(^1\)H HR-MAS) nuclear magnetic resonance (NMR) spectroscopy in a rat glioma cell line
… response improves clinical management, in vivo. Magnetic resonance spectroscopy (MRS) has demonstrated potential for identifying early biomarkers of effective treatment. However, more detailed in vitro studies are required to improve our understanding and facilitate its use. The aim of this study …
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Nuclear magnetic resonance studies of molecular geometry and configuration
Nuclear Magnetic Resonance (nmr) spectroscopy has been employed to determine molecular geometries, anisotropies in the indirect spin-spin couplings and chemical shifts, quadrupolar coupling constant, signs of indirect spin-spin coupling constants and conformational preferences of selected molecules …
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Inferences on the Structure of Aluminosilicate Glasses: A High Resolution Solid-State Silicon-29 and Aluminum-27 Nuclear Magnetic Resonance Study (magic-Angle)
… solid-state silicon-29 and aluminum-27 nuclear magnetic resonance (NMR) spectroscopy. High resolution spectra were obtained at high magnetic field strengths (11.7 and 8.45 Tesla) using magic-angle sample-spinning (MASS) techniques.
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Sodium binding as measured by sodium-23 nuclear magnetic resonance spectroscopy and its influence on saltiness perception as determined by sensory analysis
… aqueous gum systems as determined by $\sp{23}$Na nuclear magnetic resonance (NMR) spectroscopy and its relations to perceived saltiness. Additionally, multidimensional scaling (MDS), a non-traditional sensory testing method, and Decision Boundary (DB) theory, a comparative judgement theory never …
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Proton-coupled carbon-13 sample spinning NMR studies of macromolecules and ordered systems
… ordering behavior, by Carbon-13 ($\sp{13}$C) nuclear magnetic resonance (NMR) spectroscopy. We find that under ""magic angle"" spinning (MAS) these systems display high resolution due to extensive motions, and therefore traditional proton-decoupling is not necessary. In the absence of proton …
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Use of solution-state nuclear magnetic resonance spectroscopy to determine the structures of medicinally relevant peptides and proteins
… details various studies with solution-state nuclear magnetic resonance (NMR) spectroscopy to aid in the elucidation of structures of various medicinally relevant peptides. The first system studied was that of the prochlorosins, an unusual family of lantipeptides all modified to their mature …
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Theoretical and Experimental Investigations of Chemical Shielding in Amino Acids, Proteins and Model Compounds
… resolution of protein structures determined by nuclear magnetic resonance (NMR) spectroscopy. The work presented in this thesis includes an evaluation of the effects of different basis sets and theoretical methods on the calculation of individual chemical shielding tensor orientations and …
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Rational Design of Chemotherapeutic Agents by Quantitative Structure-Activity Relationships and Solution NMR Methods for High Resolution Protein Structure Refinement
… methods by high-resolution multi-dimensional nuclear magnetic resonance (NMR) spectroscopy is discussed. Uniformly 13C, 15N-labeled Saccharomyces cerevisiae iso-1 cytochrome c was overexpressed in Escherichia coli and purified in its ferric form for NMR studies. The chemical shifts of most of …
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NMR Characterization of Novel Materials for Battery Electrolyte Applications
… This thesis discusses the applications of Nuclear Magnetic Resonance (NMR) Spectroscopy in characterizing and understanding novel battery materials as potential battery electrolytes. Works discussed include: the variable temperature characterization of water-based solid polymer electrolyte …
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Quantum simulation of many-body dynamics
… mixtures, dissipative spin chains, and nuclear magnetic resonance (NMR) spectroscopy experiments.
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Chemical vapor deposition of organosilicon and sacrificial polymer thin films
… tools including Fourier transform infrared spectroscopy, variable angle spectroscopic ellipsometry, X-ray photoelectron spectroscopy, Raman spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy were utilized to characterize film structure and understand the relationship between the …
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Flow NMR, analytical applications and theoretical aspects
The use of proton nuclear magnetic resonance (NMR) spectroscopy as an on-line continuous flow detector for liquid chromatography (LC-¹H NMR) is described. Flow inserts for electromagnet and superconducting solenoid magnets are described. Applications to fuel analysis are presented. LC-¹H NMR is …
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Multinuclear NMR Studies of Gallium Complexes in Aqueous Solution.
… chemistry of gallium(III) was investigated by nuclear magnetic resonance (NMR) spectroscopy. Specifically, these studies include: characterization under various experimental conditions (pH, concentration, temperature etc.) of gallium citrate complexes, of gallium phosphate complexes, and of …
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SCREENING FOR POTENTIAL ANTIBACTERIAL AGENTS AND THE APPLICATION OF ISOTOPIC LABELS FOR THE CHARACTERIZATION OF THEIR EFFECTS ON THE DYNAMICS OF THE BACTERIAL 16S RIBOSOMAL RNA
… we screen compounds with new scaffolds using nuclear magnetic resonance (NMR) spectroscopy and identified compounds that bind weakly to a 27-nucleotide (nt) construct of the bacterial 16S ribosomal RNA (rRNA). We show that, at high concentration, these compounds interfere with bacterial …
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A preliminary investigation of the chemistry of hops: Methods for extraction and alpha-acid isomerization kinetics
… proceeds slow enough that it can be monitored by nuclear magnetic resonance (NMR) spectroscopy. From this, the rate constant, k, at 80 °C was determined to be 2.9x10-3 s-1, although this value is over 200 times the rate reported in literature. More research is necessary to fully understand the …
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Synthesis And Polymerization Of Bifunctional Five-membered Cyclic Dithiocarbonates And Their Use As Stabilizers For Magnetic Nan
… including elemental analysis, proton and carbon nuclear magnetic resonance (NMR) spectroscopy, gas chromatography-mass spectroscopy, and Fourier transmission infrared (FTIR) spectroscopy. The polyaddition polymerization of 1,3-oxathiolane-2-thione with 1,4-diaminobutane at room temperature …
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Analyzing Functional Interactions of Designed Peptides by NMR Spectroscopy
… mimicking a bacterial membrane was studied using nuclear magnetic resonance (NMR) spectroscopy. These results provided insight into the mechanism of peptide bactericidal action and the role of the peptide structure in their activity. In the second example, we perform a structural characterization …
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Design of a wideband, 100 W, 140 GHz gyroklystron amplifier
… The device is intended for use in Dynamic Nuclear Polarization (DNP) enhanced Nuclear Magnetic Resonance (NMR) spectroscopy experiments. The gyroklystron has five cavities and operates in the TE(0,2) mode with a low power electron beam. The design was performed using MAGY, a nonlinear code …
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Geometric Control of Ensemble Systems
… range from excitations of spin ensembles in nuclear magnetic resonance (NMR) spectroscopy and imaging (MRI), and desynchronization of neuron ensembles for the treatment of neurological disorders, to approximate steering of robot swarm under bounded model perturbation. However, investigating …
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