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 25 for “"solid-state Nuclear magnetic resonance (NMR)"”.
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Solid-State Nuclear Magnetic Resonance Studies of Quadrupolar Nuclei in Inorganic Systems (Nmr)
Solid-state nuclear magnetic resonance (NMR) has been used to study a variety of systems of chemical, physical, and geological interest, including zeolites, metasilicates, and semiconductors. Among the nuclei studied were $\sp $O, $\sp{27}$Al, $\sp{69}$Ga and $\sp{71}$Ga. The general motivations …
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Exploring large coherent spin systems with solid state NMR
Solid state Nuclear Magnetic Resonance (NMR) allows us to explore a large coherent spin system and provides an ideal test-bed for studying strongly interacting multiple-spin system in a large Hilbert space. In this thesis, we experimentally investigate the spin dynamics in a rigid lattice of …
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Solid-state NMR investigations of the bacteriorhodopsin photocycle
… This thesis describes the application of solid-state Nuclear Magnetic Resonance (NMR) to investigate each of the competing models in the native purple membrane environment. Conformational changes of the chromophore have been characterized by correlation of 13C-1H and 5N-1H dipolar …
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Halo-fosfatų 31P, 1H ir 35Cl kietojo kūno BMR tyrimas /
… synthesized CaPs applications. In this study, solid state Nuclear Magnetic Resonance (NMR) was used to investigate samples, composed of calcium chlorapatite (Ca5(PO4)3Cl) [4] or goryainovite (Ca2(PO4)Cl) [5], with varying morphology. 31P, 1H, 35Cl MAS [14], and 35Cl wideline NMR [15] spectra …
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Structure, conformational dynamics and formation of large amyloids: the case of alpha-synuclein fibrils
… on new methodology development combined with state-of-the-art solid-state nuclear magnetic resonance (NMR) experiments with scanning transmission electron microscopy (STEM) to obtain atomic level structural information of the alpha-synuclein (AS) fibrils and the mechanism of their formation; …
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Coherent Dynamic Nuclear Polarization: Mechanistic Insights and Experimental Advances
Dynamic Nuclear Polarization (DNP) enhances the sensitivity of solid-state Nuclear Magnetic Resonance (NMR) by transferring polarization from electrons to nuclei. While traditional continuous-wave (CW) DNP has advanced through improved radical design, the development of pulsed DNP—employing short, …
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Chemical vapor deposition and functionalization of fluorocarbon-organosilicon copolymer thin films
… infrared (FTIR), x-ray photoelectron (XPS), and solid-state nuclear magnetic resonance (NMR) spectroscopies indicates that the copolymer films range from highly cross-linked films to flexible films comprised mostly of linear polymer chains. This variation in chemical composition influences …
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Extracting Ramachandran torsional angle distributions from 2D NMR data using Tikhonov regularization /
Solid state nuclear magnetic resonance (NMR) spectroscopy is a powerful technique for studying structural and dynamical properties of disordered and partially ordered materials, such as glasses, polymers, liquid crystals, and biological materials. In particular, twodimensional( 2D) NMR methods such …
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NMR Studies of Interfacial Reactions in Lithium-Ion Batteries
… batteries. In this work, solution- and solid-state nuclear magnetic resonance (NMR) methodologies are developed for studying the electrode-electrolyte reactions. The decomposition reactions of the electrolyte solution at positive electrodes, layered transition metal oxides (LiMO2, M = …
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Structural Characterization of Plaque Seeded Amyloid-β Fibrils by Magic Angle Spinning NMR
… a single structure, in the case of Aβ₁₋₄₂ three solid state nuclear magnetic resonance (NMR) studies conducted by different research groups have found essentially the same structure. However, since Aβ is prone to polymorphism it is not clear if this consensus structure reflects what is present in …
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Solution and solid state NMR studies of fluorine tagging reagents
… determined by utilizing a number of solution and solid-state nuclear magnetic resonance (NMR) techniques. In solution NMR studies p-fluorobenzoyl chloride was the fluorine tagging reagent of choice because of a large ¹⁹F chemical shift range for the different derivatized substrates (~10 ppm) and …
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Characterization of native and bypass human coronary artery plaque deposits from the same heart: investigation of the chemical form of calcium in human coronary artery plaque deposits
… coupled plasma mass spectrometry (ICPMS), solid-state nuclear magnetic resonance (NMR), high performance liquid chromatography (HPLC), etc. The results from the ICPMS technique showed that the concentrations of Ca and P varied widely in the bypass arteries. In contrast, the concentrations …
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Advances in oxygen-17 NMR for biological structure determination
… and proteins, membrane proteins, and viruses, by solid-state nuclear magnetic resonance (NMR) spectroscopy has materialized as an important field due to the high-resolution details that the technique provides. While solid-state NMR studies have focused on the three prevalent spin I = 1/2 nuclei …
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INTERACTION OF POLYCYCLIC AROMATIC HYDROCARBONS WITH DISSOLVED AND SEDIMENT ASSOCIATED HUMIC MATERIALS (NMR, FLUORESCENCE)
… and nitrogen analysis plus UV, infrared, and 13C solid state nuclear magnetic resonance (NMR) spectroscopy were used to investigate compositional and structural variations in humic materials. Three measures of the degree of C=C bond formation (UV absorptivity at 272 nm, atomic H/C ratio, and …
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Elucidating Structure and Dynamics of Extracellular Matrix Collagen Using Solid-State NMR
In recent years, solid-state Nuclear Magnetic Resonance (NMR) has emerged as an established spectroscopic method to afford detailed structural information on native cellular and extracellular components at atomic-scale resolution. Fibrillar collagens are the most common component of the …
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SOLID-STATE NMR INVESTIGATION OF STRUCTURE AND DYNAMICS OF SOLID ELECTROLYTES AND COATINGS FOR LI-ION BATTERY APPLICATIONS
… large battery fires. Potential solutions include solid state batteries in which the organic solvent is replaced by a polymer or inorganic solid electrolyte. Cubic Li7La3Zr2O12 (LLZO) is a solid electrolyte of interest due to its high Li-ion conductivity for an oxide ceramic and expected stability …
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Development of Quantitative Solid-State NMR Methods to Characterize Membrane Proteins
… critical proteins in native-like environments. Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy provides one of the few methods available to study the structure and dynamics of membrane proteins directly in the lipid bilayer. Herein, practical and theoretical considerations of dipolar …
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The use of serface fuintionalised silica nano-particlate powders for the identification of gunshot residues from fingerprints
… particles size analyser, BET surface area and solid-state nuclear magnetic resonance (NMR) spectroscopy. These powders were used as an effective agent to visualise latent fingerprints on different surfaces. Furthermore, they have been utilised to absorb any organic materials within the …
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Molecular-Level Understanding of Electrochemical Reaction Mechanisms and Electrode Interphases in Metal-CFx Batteries
… a combination of electrochemical experiments, solid-state nuclear magnetic resonance (NMR) spectroscopy, and other spectroscopic and surface science measurements. NMR spectroscopy, uniquely suited for probing environments, composition, dynamics, and interactions up from the atomic scale, was …
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$^{17}$O Solid-State NMR Spectroscopy of Functional Oxides for Energy Conversion
… of this thesis is the development of $^{17}$O solid-state nuclear magnetic resonance (NMR) spectroscopic techniques to study the local structure and ion dynamics of functional oxide materials for applications in energy conversion, in particular as electrodes and electrolytes in solid oxide fuel …
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