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Dissertations / Theses on the topic 'Nuclear quadrupole resonance spectroscopy'

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Published: 4 June 2021
Last updated: 27 July 2024

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1

Koukoulas, Alexander Anthony. "Investigations in pulsed nuclear quadrupole resonance spectroscopy." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74278.

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The theoretical and experimental aspects of Nuclear Quadrupole Resonance (NQR) spectroscopy are examined with respect to instrumentation and experimental methodology. The interaction of the quadrupolar moment with the electric field gradient is derived from first principles and extended to include transient experiments. The response of the nuclear magnetization to a single pulse for a spin I = 3/2 system, assuming zero asymmetry, is calculated exactly under the Bloom, Hahn and Herzog model and applied to the NQR spin-lattice (T$ sb1$) relaxation in polycrystalline solids.<br>The theory and use
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2

Glickstein, Jarred S. "Automated Polarisation Enhanced Broadband Nuclear Quadrupole Resonance Spectroscopy." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1513081362905414.

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3

Li, Xiaohua. "NMR of group 2 element quadrupolar nuclei and some applications in materials science and biology." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/30998.

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4

Poulin, Neal M. "Deuterium nuclear magnetic resonance in model membrane systems : an investigation of the interaction of a synthetic, amphiphilic polypeptide with charged lipids." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24898.

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The theory of the quadrupole interaction in nuclear magnetic resonance spectroscopy and relaxation measurements is presented in detail, with applications to ²H-NMR studies of order and dynamics in bilayers of deuterated lipids. Investigations of lipid-protein interactions in reconstituted membrane systems and intact biological membranes are reviewed. An experimental program is described which uses a synthetic amphiphilic polypeptide, with known geometry and variable length, to isolate questions about the geometrical interpretation of orientational order in lipid-protein interactions. A report
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5

Stourton, E. C. "Anisotropic interactions in solid-state nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243269.

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6

Dong, Sunny Ronald. "The investigation of indium halides and graphite intercalation compounds using time-differential perturbed angular correlation gamma-ray spectrosocopy." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28375.

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This thesis discusses in general terms the theory and application of time-differential perturbed angular correlation gamma-ray spectroscopy (TDPAC) to the study of solid state physics. The technique yields valuable information on the electric field gradients experienced by radionuclides which have been substituted for nonradioactive isotopes or inserted as impurities into various inorganic compounds. The indium halides are examined in a series of experiments. The first applications of this technique to the study of graphite intercalation compounds are discussed.<br>Science, Faculty of<br>Physi
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7

Urban, Jeffry Todd. "Nuclear magnetic resonance studies of quadrupolar nuclei and dipolar field effects." Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/836811-joXo6p/native/.

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Thesis (Ph.D.); Submitted to the University of California, Berkeley, CA (US); 21 Dec 2004.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "LBNL--56768" Urban, Jeffry Todd. USDOE Director. Office of Science. Office of Basic Energy Sciences (US) 12/21/2004. Report is also available in paper and microfiche from NTIS.
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8

Colaux, Henri. "Investigating sensitivity improvement methods for quadrupolar nuclei in solid-state nuclear magnetic resonance." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9628.

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The study of quadrupolar nuclei using NMR spectroscopy in the solid state significantly increased in popularity from the end of the 20th century, with the introduction of specific methods to acquire spectra free from the effects of the quadrupolar interaction, that results in broadened lineshapes that cannot be completely removed by spinning the sample at the magic angle (MAS), unlike most of the other interactions present in the solid state. The first technique which allows, without any specific hardware, the removal of this broadening has been the Multiple-Quantum MQMAS experiment. The metho
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9

Segiňák, Ján. "Optimalizace pokusného NQR spektrometru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-318168.

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The thesis deals with the NQR spectroscopy, which is one of the modern non-destructive measurement and diagnostic methods for the characterization of various materials. It is using a quadrupole moment - a property of atomic nuclei of certain isotopes. A method of nuclear quadrupole resonance (NQR) is in principle very similar to nuclear magnetic resonance (NMR). Thesis in the theoretical part analyse the principles of NMR and NQR, describes the possible use of this method to detect for example explosives, drugs, and other chemicals. In the following chapters are analysed the key parameters of
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10

Frassineti, Jonathan. "Evidence of a quantum entangled state between the muon spin and 51V nuclear spin (I=7/2) in A15 compounds." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The purpose of this thesis is the study of the interaction at the atomic level between the positive muon μ+, with spin S = 1/2, and nuclei having spin I >1/2. Normally the μ+, a particle with a charge equal (in absolute value) to that of the electron and which interacts with the magnetic fields through its magnetic moment, can form a quantum entangled state when it is implanted between two nuclei with spin I=1/2, such as fluorine; this phenomenon causes a peculiar trend of the muon polarization. This phenomenon has never been observed for materials with nuclei having large spin. Very recently
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11

Trepanier, Roland J. "14N nuclear quadrupole resonance investigations." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74551.

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The interaction between non-spherical nuclear charge distribution and the electric field gradient is described. Expressions for the energy levels (I = 1), the nuclear quadrupolar resonance, NQR, transition frequencies and line shape are derived. The general equations to obtain the inverse line width parameter, T$ sb2 sp star,$ from the self-quenched super-regenerative oscillator, SRO, NQR spectra are derived and tested.<br>The construction and operation of the $ sp{14}$N Sullivan and Dean SRO spectrometers are described. Limits in the sensitivity of the SRO to yield T$ sb2 sp star$ data are di
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12

Kyriakidou, Georgia. "Medicines authentication using nuclear quadrupole resonance." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/medicine-authentication-using-nuclear-quadrulope-resonance(793151c5-1939-4891-af01-f493cb48d846).html.

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Nuclear Quadrupole Resonance (NQR) is a radio-frequency (RF) spectroscopic technique, that allows the detection of solid-state compounds containing quadrupolar nuclei; a property of the majority of pharmaceutical products. This thesis investigates the application of NQR in medicines authentication, where accurate \ fingerprints" of the examined materials must be obtained, in response to the global threat of low quality and counterfeit medicines. In practice, a complete NQR system contains a database with profiles of commercial medicines, built using characteristic features of the NQR signals.
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13

Silva, Marcos Antonio da. "Estudo de compostos LiMePO4 (Me=Mg, Co, Ni) através de Ressonância Magnética Nuclear." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-13032014-112117/.

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Nesta dissertação é apresentado um estudo dos compostos Li1-3xMgFexPO4 através de Ressonância Magnética Nuclear (7Li e 31P), no intervalo de temperatura de 150 a 410 K. Estudos desses compostos através de técnicas de difração de elétrons e efeito Mossbauer confirmam que os íons Fe entram na rede cristalina na forma Fe3+, substituindo os íons Li+. O comportamento dos espectros de RMN, dos tempos de relaxação spin-rede e da susceptibilidade magnética dos núcleos 7Li e 31P em função da temperatura, em conjunto com medidas de condutividade iônica, indicam que, mesmo com a adição de impurezas Fe3+
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14

Tate, Elizabeth Alice Kate. "The application of nuclear quadrupole resonance to pharmaceutical analysis." Thesis, King's College London (University of London), 2007. https://kclpure.kcl.ac.uk/portal/en/theses/the-application-of-nuclear-quadrupole-resonance-to-pharmaceutical-analysis(c0402395-842a-4700-a0ac-42f498f7f25a).html.

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Research was conducted using nuclear quadrupole resonance (NQR) to investigate its potential application to pharmaceutical analysis. 14-nitrogen and 35-chlorine quadrupole resonance frequencies between 1 and 37 MHz have been established and characterised for a number of materials of pharmaceutical and chemical interest with a view to applying the technique of NQR to pharmaceutical analysis, possibly on an industrial scale. Background information and the theory of nuclear quadrupole resonance are discussed, together with the experimental hardware used, personal instrumental modifications made,
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15

Kitagawa, Shunsaku. "Nuclear Magnetic Resonance/ Nuclear Quadrupole Resonance studies of two dimensional layered compounds with the "1111" structure." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175102.

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16

Patel, Sunil U. "Nuclear magnetic resonance spectroscopy and ultrasound." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9708/.

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The work described in this thesis is directed to the examination of the hypothesis that ultrasound may be used to perturb molecular motion in the liquid phase. These changes can then be detected by nuclear magnetic resonance (NMR) in spin-lattice and spin-spin relaxation times. The objective being to develop a method capable of reducing the pulsed NMR acquisition times of slowly relaxing nuclei. The thesis describes the theoretical principles underlying both NMR spectroscopy and ultrasonics with particular attention being paid to factors that impinge on testing the above hypothesis. Apparatus
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17

Rabbani, S. R. "Nuclear Quadrupole Double Resonance : Investigations in heterogeneous samples and biological compounds." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371561.

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18

Aissani, Sarra. "Résonance quadrupolaire de l'azote-14 : amélioration de la qualité spectrale et effet d'un champ magnétique statique de faible amplitude." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0069/document.

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La Résonance Quadrupolaire Nucléaire (RQN) est une technique spectroscopique appliquée à l’état solide et qui ne nécessite aucun champ magnétique statique contrairement à la Résonance Magnétique Nucléaire (RMN). Elle permet de détecter, les molécules qui contiennent un noyau quadrupolaire (tel que l'azote-14). La RQN de l’azote-14 suscite un intérêt particulier car elle s'avère utile dans la détection de drogues et d’explosifs, qui contiennent, pour la plupart, des molécules azotées. Cette thèse porte en premier lieu sur l’amélioration de la qualité spectrale en résonance quadrupolaire (RQN) d
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19

Payne, Nicholas Roy. "Quadrupolar relaxation-based methods in fast field-cycling MRI." Thesis, University of Aberdeen, 2019. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=240235.

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Quadrupolar relaxation-based methods in Fast Field-Cycling MRI Nicholas R. Payne Aberdeen Biomedical Imaging Centre, University of Aberdeen, AB25 2ZD, Scotland, UK Fast Field-Cycling MRI (FFC-MRI) can access contrast based on the dependence of a sample's relaxation rate to the applied magnetic field strength. This technique can provide signal based on interactions with local quadrupolar nuclei through cross-relaxation, however, there are other so-called Nuclear Quadrupole Double Resonance (NQDR) techniques described in the literature. This work has been centred on efforts to apply these techni
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20

Xu, Ping. "New methods in nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239177.

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21

Cavanagh, John. "New techniques in nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293707.

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22

Wu, Xi-Li. "New techniques in nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385872.

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23

Claridge, Timothy David William. "Protein studies by nuclear magnetic resonance spectroscopy." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303628.

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24

Wormald, Philip. "Nuclear magnetic resonance spectroscopy of vinylidenefluoride polymers." Thesis, Durham University, 2005. http://etheses.dur.ac.uk/2615/.

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High-resolution solid- and solution state NMR techniques have been applied in the study of a Semi crystalline fluoropolymer Poly(vinylidienfluoride) (PVDF) and a vinylidienfluoride telomer. The application of standard solution-state experiments with high power decoupling and two-dimensional techniques has provided a greater understanding of the structure of these two fluoropolymers. Specifically, Cosy and Tocsy experiments gave information on signals normally related to end groups and to previously unidentified structures, which suggest the presence of at least a second major structure. 19F so
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25

Jones, David Nigel Mark. "Nuclear magnetic resonance spectroscopy of bacterial polysaccharides." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316713.

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26

Barker, P. B. "New techniques in nuclear magnetic resonance." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375213.

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27

Cousin, Samuel. "Two-field nuclear magnetic resonance : spectroscopy and relaxation." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066354/document.

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Cette thèse traite de la RMN en phase liquide à champs multiples, pour la détermination de la structure et de la dynamique de petites molécules et de protéines. La dynamique ps-ns des chaînes latérales de la protéine ubiquitine a été étudiée par la relaxation du 13C des groupes méthyles δ1 des isoleucines, marqués sélectivement. Les vitesses de relaxation mesurées à plusieurs hauts champs magnétiques et les vitesses de relaxation longitudinale de 0.29 T à 9 T obtenues par relaxométrie haute résolution ont été analysées à l'aide du programme ICARUS, adapté à l’occasion pour les groupes méthyle.
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28

Duce, Suzanne Louise. "Nuclear magnetic resonance imaging and spectroscopy of food." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240194.

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29

Clarke, William. "Human cardiac magnetic resonance spectroscopy." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:b75351dc-e4eb-4856-b901-4ba486ffe175.

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The status of the myocardial 'high energy phosphate' metabolism is a sensitive marker of the occurrence and progression of heart failure. Magnetic resonance spectroscopy enables non-invasive, direct and potentially quantitative measurements of the phosphate containing metabolites present in the human myocardium. This thesis is primarily concerned with the creation of measurement techniques for cardiac phosphorus magnetic resonance spectroscopy (<sup>31</sup>P-MRS) at the 7 tesla field strength. Chapter 1 provides an overview of the physical basis of magnetic resonance spectroscopy, the myocard
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30

Norwood, Timothy John. "Nuclear magnetic resonance in inhomogeneous magnetic fields." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24875.

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The work described in this thesis was initiated in an attempt to overcome the limitations imposed upon NMR spectroscopy by magnetic field inhomogeneity in two specific areas: high resolution spectroscopy in isotropic liquids, and chemical shift resolved NMR imaging in isotropic liquids. In both cases magnetic field inhomogeneity may degrade the resolution of spectra to such an extent that no useful information can be obtained from them. In high resolution NMR spectroscopy it is necessary to be able to extract accurately the parameters present within the spectrum such as chemical shifts, coupl
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31

Gosling, P. "Nuclear quadrupole double resonance : Detection of low frequency quadrupolar nuclei using fluorine and hydrogen." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375258.

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32

Mukherjee, Shrijit. "Broadband electric field sensing and its application to material characterisation and nuclear quadrupole resonance." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/7666/.

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The aim of this project is to address the challenges associated with extending the radio frequency capability of Electric Potential Sensors to greater than 10 MHz. This has culminated in a single broadband sensor, with a frequency range of 200 Hz to greater than 200 MHz. The use of Electric Potential Sensors for the measurement of electric field with minimal perturbation has already been demonstrated at Sussex. These high impedance sensors have been successfully employed in measuring signals with frequencies in the range 1 mHz to 2 MHz. Many different versions of these sensors have been produc
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33

Borisov, Alexey S., and University of Lethbridge Faculty of Arts and Science. "Solid-state nuclear magnetic resonance spectroscopy of phosphazene polymers." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2009, 2009. http://hdl.handle.net/10133/1305.

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High-resolution one-dimensional 1H, 19F, 31P and 13C MAS NMR experiments were used in a morphological study of solvent-cast and heat-treated poly[bis(trifluoroethoxy)phosphazene] (PBFP). Deconvolution analyses performed on all Nuclear Magnetic Resonance (NMR) spectra are presented. These results suggest the presence of broad and narrow overlapping components at ambient temperature, which were assigned to the crystalline, amorphous and the mesophase regions within the polymer, respectively. The number of signals in the spectra was independently verified using 1H, 19F and 13C Discriminati
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34

Friedrich, J. O. "Frequency and spatial selectivity in nuclear magnetic resonance spectroscopy." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234964.

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35

Wijeyesekera, Anisha Dimanthi. "Nuclear magnetic resonance spectroscopy based metabolic profiling of ageing." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520984.

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36

Champion, de Crespigny Alexander James Stephen. "Spatial localisation in nuclear magnetic resonance imaging and spectroscopy." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386006.

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37

Zhang, Yang 1964. "Radio frequency gradient high resolutions nuclear magnetic resonance spectroscopy." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39054.

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38

Guitard, Pierre-André. "Local Nuclear Magnetic Resonance Spectroscopy with Giant Magnetoresistive Sensors." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS175/document.

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La Spectroscopie par Résonance Magnétique Nucléaire (NMRS) est une technique largement connue pour l'analyse de molécules chimique et biologiques. Cependant, en raison de la faible intensité des signaux de RMN, il est très difficile de travailler sur des volumes inférieurs à un mm³. Cette limitation a conduit à la mise au point de capteurs miniaturisés tels que les microbobines, les centres NV et des magnétomètres atomiques. Au cours de cette thèse nous avons développé une approche basée sur l'utilisation de capteurs à MagnétoRésistance Géante (GMR), capteurs magnétiques à large de la bande, c
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39

Stonehouse, Jonathan. "New techniques in NMR spectroscopy." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360628.

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40

Almond, Graham G. "A nuclear magnetic resonance study of hydrous layer silicates." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5096/.

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This is a study of five silicates, namely makatite, kanemite, octosilicate, magadiite and kenyaite. The silicates have been analysed using a range of techniques, principally solid-state NMR spectroscopy. High-quality (^29)Si NMR spectra have been obtained for samples of all five layered sodium polysilicate hydrates. Amongst other findings, these have revealed four crystallographically distinct sites in makatite and a Q(^4):Q(^4) site ratio in kenyaite of ca. 5. Proton MAS NMR studies can produce well-resolved spectra, particularly for carefully-dried samples. Distinct water and strongly hydrog
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41

Iannaccone, Gennaro A. "The development of laboratory sessions for a introductory course in nuclear magnetic resonance spectroscopy." Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01202010-020241/.

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42

Wang, Yue. "Investigations of RNA pseudoknot structures and dynamics by nuclear magnetic resonance spectroscopy /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992935.

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43

Keevil, Stephen Frederick. "Experimental techniques to characterise localisation in nuclear magnetic resonance spectroscopy." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268303.

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44

Bilinovich, Stephanie M. "Nuclear Magnetic Resonance Spectroscopy in the Study of Protein Complexes." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1396871078.

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45

Talagala, Sardha Lalith. "Aspects of NMR imaging and in vivo spectroscopy." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27550.

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The work described in this thesis deals mainly with aspects related to two- and three-dimensional NMR imaging. A detailed discussion on frequency-selective excitation using amplitude modulated rf pulses in relation to slice selection in NMR imaging has been presented. This includes the analysis and implementation of the method as well as illustrative experimental results. Several radiofrequency probe designs suitable for high field NMR imaging have been experimentally evaluated and their modification and construction are also described. The comparative results obtained indicate the merits a
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46

Jones, Jonathan A. "Nuclear magnetic resonance data processing methods." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:7df97c9a-4e65-4c10-83eb-dfaccfdccefe.

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This thesis describes the application of a wide variety of data processing methods, in particular the Maximum Entropy Method (MEM), to data from Nuclear Magnetic Resonance (NMR) experiments. Chapter 1 provides a brief introduction to NMR and to data processing, which is developed in chapter 2. NMR is described in terms of the classical model due to Bloch, and the principles of conventional (Fourier transform) data processing developed. This is followed by a description of less conventional techniques. The MEM is derived on several grounds, and related to both Bayesian reasoning and Shannon inf
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47

Houston, Christine Margaret. "Laser ionisation studies : applications in nuclear waste monitoring." Thesis, University of Glasgow, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481125.

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48

Woodruff, Nicholas D. "Investigation of protein structure and folding by NMR spectroscopy." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302124.

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49

Krishnan, Mangala Sunder. "Applications of irreducible spherical tensor operators to NMR and NQR spectroscopy." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75771.

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The thesis extends the concept of Irreducible Spherical Tensor Operators to spin dynamics problems in Nuclear Magnetic and Quadrupole Resonance Spectroscopy. NQR and solid state NMR deal with spin systems which behave as effective single spins in many, pulsed experiments, or as multispin systems when the dipolar interactions among spins cannot be neglected. The thesis considers problems in both areas. New analytic results are derived in the thesis for pure NQR spectroscopy and for the effect of radiofrequency fields in the presence of electric quadrupolar interaction. Three-pulse experiments a
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50

Edlich, Christian. "Structural studies of the pleckstrin protein by nuclear magnetic resonance spectroscopy." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973963123.

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