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 3191 for “"nmr"”.
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Nmr Study of Gases
Made available in DSpace on 2014-12-09T17:35:23Z (GMT). No. of bitstreams: 1 6604238.pdf: 3836032 bytes, checksum: 143d25da211a98ce6afdc206ffd80397 (MD5) Previous issue date: 1965
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Process Applications of NMR
This thesis describes applications of NMR techniques to flowing liquid streams to obtain quantitative information about the contents of the streams. The quantitative accuracy of NMR spectroscopy for composition measurement of liquid mixtures is measured as ±0.34 mol% and ±1 mol% for static and …
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Sonically induced narrowing of the NMR spectra of solids and other novel NMR techniques
A typical liquid state NMR spectrum is composed of a number of discrete absorptions which can be readily interpreted to yield detailed information about the chemical environment of the nuclei found within the sample. The same cannot be said about the spectra of solid samples. For these the …
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NMR investigations of cyanate resins
… both high resolution solution and solid-state NMR spectroscopies combined with specific isotopic enrichments are used to study such kinds of heterogeneous polymers with a particular focus on cyanate resin polymer systems, which are newly-developed thermo set resins used for electronic circuit …
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OPEN SOURCE NMR RELAXOMETRY PLATFORM
… cost, open source hardware platform for use in NMR relaxometry experiments. The platform is capable of a wide variety of relaxometry experiments comprising many magnet, coil, and sample combinations. The majority of the RF chain is broadband, allowing operation over a large frequency range with …
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Planar Coils for NMR Microspectroscopy
… the feasibility of using planar coils in NMR microspectroscopy. The sensitivity of planar coils is modeled and measured, and optimum coil sizes are determined for specific applications. Also, susceptibility effects, which limit spectral resolution caused by the coil and the sample …
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Applications of Chiral Nmr Solvents
Made available in DSpace on 2014-12-10T23:01:22Z (GMT). No. of bitstreams: 1 7219888.pdf: 3559423 bytes, checksum: d331bfa23f980499c84a6fb1e646b446 (MD5) Previous issue date: 1972
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Nmr Spectroscopy in Chiral Solvents
Made available in DSpace on 2014-12-09T17:36:29Z (GMT). No. of bitstreams: 1 7013241.pdf: 5951930 bytes, checksum: b666f6e3943a05ab675d4b201eeea9f6 (MD5) Previous issue date: 1969
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NMR imaging of tumor angiogenesis
… two times those of normal tissue vessels. NMR techniques based on magnetic susceptibility mechanisms are sensitive to varying sizes of blood vessels. By using gradient echo (GE) and spin echo (SE) pulse sequences and different concentrations of an exogenous contrast agent, it is possible to …
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NMR studies of quantum thermalization
Quantum thermalization is a generic process that a quantum system reaches its equilibrium. Quantum thermalization lies in the interface of various distinct fields, ranging from condensed matter physics and quantum cosmology to quantum information science. The converging efforts from different …
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High resolution NMR in solids.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1972. Ph.D.
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Electromagnetically induced transparency by NMR
Electromagnetically Induced Transparency (EIT) is a quantum nonlinear optical interference effect in which light at a certain frequency makes normally opaque atomic systems transparent to light at another frequency. Recent experiments in Atomic Molecular and Optical (AMO) physics demonstrated how …
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NMR Studies of Solid-Supercritical Fluid Mixtures and a New Technique for NMR Diffusion Measurements
… of the binary mixture by using a novel, in situ NMR technique. The pressure-temperature trace of the solid-liquid-gas phase line that terminates at the upper critical end point was also determined. The results are discussed in terms of the supercritical solubility theory of Gitterman and …
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NMR Study of n-Propyllithium Aggregates
A variable temperature 1H, 13C, and 6Li NMR study of n-propyl-6Li-lithium showed five different aggregates, similar to that in the literature as (RLi)n, n= 6, 8, 9, 9, 9. There were also a number of additional new species, identified as lithium hydride containing aggregates. Unexpectedly, a series …
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Using SABRE in NMR and MRI
… SABRE as a hyperpolarisation technique in both NMR spectroscopy and MRI. Hyperpolarisation is a method of generating enhanced magnetic resonance signals to improve signal to noise, contrast and resolution within those techniques. The primary aim of this thesis was to develop the SABRE method in …
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Rheo-NMR-Untersuchungen an lyotropen Systemen
… Hierfür wurde eine Miniatur-Scherzelle in einen NMR-Probenkopf integriert, so dass es möglich war durch Kombination aus Rheologie und 2H-NMR-Spektroskopie, der sogennaten Rheo-NMR, das Fließverhalten zu eruieren. Deformationsabhängig NMR-Experimente einer C10E3/Wasser-Mischung sind mit der …
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Development of novel NMR pulse sequences
… of orgamc molecules in solution using pulse FT NMR, heteronuclear pulse sequence experiments to probe carbon-13 (13C) and proton (1H) spin systems are invaluable. The one-dimensional insensitive nucleus detected PENDANT experiment finds popular use for structure determination via one-bond 13C-1H …
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Applications of High Pressure Dynamic NMR
… in solution have been studied using $\sp $F FT-NMR spectroscopy. The pressure dependence of the isomerization of 1,1-difluorcyclohexane in acetone-d$\sb6$, n-pentane and methylcyclohexane compared to the pressure dependence of the isomerization of cyclohexane in the same solvents indicates that …
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