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 8 of 8 for “"Scalar coupling"”.
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High-Resolution Nuclear Magnetic Resonance Microspectroscopy
… coupled with conventional chemical shift and scalar coupling differences, were shown for the first time for mass-limited samples.
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Monotonicity of the Period Function for Hamiltonian Systems with Potentials
… potential, and implement an all-to-all velocity coupling with a scalar coupling parameter. To adhere to the constraints of the open book spaces, we alter this double-well potential according to modifications we established. After replacing the original potential with its modification, we explore …
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Experimental constraints on exotic spin-dependent interactions using specialized materials
… from mm-m [1]. These forces can arise from the coupling of a spin 0 boson to spin 1/2 fermions through scalar (gs) and pseudoscalar (gp) couplings. We discuss two experiments that can investigate these interactions using nucleon rich, impressively low magnetic susceptibility (5-100 times lower …
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Development of novel NMR pulse sequences
… for structure determination via one-bond 13C-1H scalar couplings. PENDANT facilitates the desired increase in 13C signal-to-noise ratio, and unlike many other pulse sequence experiments (e.g., refocused INEPT and DEPT), allows the simultaneous detection of 13C quaternary nuclei. The tlrst chapter …
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Studies of liquid phase intermolecular interactions utilizing ¹H and ¹³C dynamic nuclear polarization and nuclear magnetic resonance techniques
… bonds. The ¹³C DNP results demonstrated that the scalar dominated enhancement is sensitive to the acidity of carbon-hydrogen bonds as well as to the correlation times of the sample molecules. A hydrogen bonding spin polarization model is used, for the first time, to interpret the scalar components …
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Structural and Biophysical Characterisation of Denatured States and Reversible Unfolding of Sensory Rhodopsin II
… globular proteins by measuring $^1{\it J}_{NH}$ scalar coupling constants using NMR. In Chapter 4, different methods for measuring $^1{\it J}_{NH}$ scalar coupling were explored using RalA, a small GTPase with a mixed alpha/beta fold, as proof-of-concept. Detection of hydrogen bonds was then …
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Folding and aggregation of amyloid peptides
… force fields. Additionally, the comparison with scalar coupling constants suggest that the chosen protonation in both simulations corresponds to a pH lower than in the experiment. Based on this analysis we were unable to determine which force field yields a better description of this system. …
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Making Nuclear Magnetic Hyperpolarization Practical through Storage in Disconnected Eigenstates
… accessing the disconnected eigenstate involves coupling a chemically equivalent spin-1/2 pair asymmetrically to an auxiliary spin-1/2 pair. I demonstrate that the disconnected state may still be accessed when the auxiliary nuclei are spin-1. This has two distinct advantages. When the auxiliary …