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Dissertations / Theses on the topic 'NMR Measurements'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Di, Caro Domenico. "NMR measurements for hazelnuts classification." Doctoral thesis, Universita degli studi di Salerno, 2018. http://hdl.handle.net/10556/3113.

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2016 - 2017<br>In this work, a method for the quality detection of the in-shell hazelnuts, based on the low field NMR, has been proposed. The aim of the work is to develop an in-line classification system able to detect the hidden defects of the hazelnuts. After an analysis of the hazelnut oil, carried out in order to verify the applicability of the NMR techniques and to determine some configuration parameters, the influence factors that affect these measurements in presence of solid sample instead of liquids have been analyzed. Then, the measurement algorithms were defined. The proposed clas

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2

Stait-Gardner, Tim, Scott A. Willis, Nirbhay N. Yadav, Gang Zheng, and William S. Price. "NMR diffusion measurements of complex systems." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189360.

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The pulsed gradient spin-echo nuclear magnetic resonance experiment is a powerful tool for studying the constitution and structure of complex systems (e.g., polydisperse systems and porous media). In applications to polydisperse systems, it is important to consider the effects of obstruction, exchange, entanglement, and diffusional averaging processes whereas in applications to porous samples, reliable structural information can only be extracted from the time-dependence of the apparent diffusion coefficient when the deleterious effects of spatially and/or temporally inhomogeneous background (

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3

Stait-Gardner, Tim, Scott A. Willis, Nirbhay N. Yadav, Gang Zheng, and William S. Price. "NMR diffusion measurements of complex systems." Diffusion fundamentals 11 (2009) 15, S. 1-22, 2009. https://ul.qucosa.de/id/qucosa%3A12901.

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The pulsed gradient spin-echo nuclear magnetic resonance experiment is a powerful tool for studying the constitution and structure of complex systems (e.g., polydisperse systems and porous media). In applications to polydisperse systems, it is important to consider the effects of obstruction, exchange, entanglement, and diffusional averaging processes whereas in applications to porous samples, reliable structural information can only be extracted from the time-dependence of the apparent diffusion coefficient when the deleterious effects of spatially and/or temporally inhomogeneous background (

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4

Khajeh, Maryam. "Kinetic measurements using time-resolved NMR spectroscopy." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/kinetic-measurements-using-timeresolved-nmr-spectroscopy(aae85bb3-de19-450a-96ab-50e2dfd89da7).html.

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Many thousands of pounds are spent every year by pharmaceutical companies on understanding the mechanisms and kinetics of chemical reactions involved in drug discovery and production. NMR spectroscopy is often at the core of these studies as it is a powerful, non-destructive method for structure elucidation. As such investigations can be time-consuming and cost-inefficient, AstraZeneca, the project sponsor, is interested in more efficient methods for studying the kinetics of pharmaceutical reactions. In this work a number of different techniques have been devised, studied, and implemented to s

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5

Ferrari, Maude, J. P. Mérel, Sébastien Leclerc, Christian Moyne, and Didier Stemmelen. "Study of dispersion by NMR: comparison between NMR measurements and stochastic simulation." Diffusion fundamentals 18 (2013) 11, S. 1-4, 2013. https://ul.qucosa.de/id/qucosa%3A13718.

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Dispersion remains, today, a highly topical subject. Our group has been interested in characterizing this phenomenon by pulsed-field-gradient NMR technique. Direct measurement of the dispersion coefficient can be done with a Pulsed Gradient Spin Echo (PGSE) sequence by assuming that the asymptotic regime is reached. In unsteady state, the propagator formalism is used. To better understand these measurements, the NMR experiment is modeled using a stochastic simulation (random walks) and compared with experimental results. The comparison is made for the simple case of Poiseuille flow in a circul

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6

Unger, Philip Peter. "NMR-based microprobes for magnetic field measurements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ62675.pdf.

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7

Liess, Carsten. "NMR spectroscopic measurements of diffusion in heart." Thesis, University of Oxford, 1999. http://ora.ox.ac.uk/objects/uuid:1ed27b71-578a-4558-950a-10ded28bc2b3.

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A decrease in the apparent diffusion coefficient (ADC) of water is becoming an important tool for the detection of acute and chronic brain disorders, yet it is not known whether changes in myocardial ADCs hold similar potential. Consequently, this work determined whether the ADCs of water or intracellular metabolites could be used to show ischaemia or cell swelling in the isolated rat heart. A modified STEAM pulse sequence was designed to measure the ADCs of the <sup>1</sup>H-NMR detectable metabolites, taurine and creatine, with 4 min time resolution in a 3 mm myocardial slice. Experiments in

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8

Miah, Habeeba Khatun. "Solid-state NMR measurements of proton chemical shift anistropies." Thesis, University of Nottingham, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.716676.

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A new isotropic-anisotropic correlation experiment has been designed. This combines ultrafast magic angle spinning (MAS) at rates up to 80 kHz for good resolution of isotropic sites with a symmetry-based recoupling sequence to reintroduce the chemical shift anisotropy (CSA) in the indirect dimension. The experiment was implemented for protons at a Larmor frequency of 600 MHz, with some further development at a higher field corresponding to 850 MHz. The experiment was also successfully extended to the case of 19F CSAs. The CSA can be extracted by fitting the resulting lineshapes when the isotro

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9

Law, Susan. "The characterisation of microemulsions using NMR measurements of diffusion." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5983/.

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This thesis investigates how nuclear magnetic resonance (NMR) measurements of diffusion are used to characterise reverse micelles (RMs) in water-in-oil (w/o) microemulsions. The average droplet sizes were determined at varying water to surfactant ratios (ω) and droplet volume fractions (ød), by converting the diffusion coefficients from the surfactant molecules into hydrodynamic radii using the Stokes-Einstein equation. The size distributions of AOT/n-octane/water RMs were obtained by the application of a constrained form of the inverse Laplace transform. The AOT/iso-octane/water/pentanol and

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10

Adem, Ziad, Tobias Titze, Cordula B. Krause, et al. "Correlating PFG NMR and IR diffusion measurements in porous glasses." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189411.

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11

Adem, Ziad, Tobias Titze, Cordula B. Krause, et al. "Correlating PFG NMR and IR diffusion measurements in porous glasses." Diffusion fundamentals 11 (2009) 19, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13958.

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12

Payne, Geoffrey. "NMR studies on the local distributions of sodium ions in living systems." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329930.

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13

Li, Liangmou, Igor Shikhov, Yong Zheng, and Christoph Hermann Arns. "Experiment and simulation on NMR and electrical measurements on Liège Chalk." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-178744.

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Liège Chalk is a limestone of considerable commercial interest to the petroleum industry and formation factor a quantity required in this context. In this work we compare the formation factors based on electrical conductivity and diffusional displacement in a long time limit both experimentally and numerically. Measurements are performed on Liège Chalk samples while simulations are performed on two model structures represented by randomly packed ellipsoids and utilizing a Gaussian random field approach. We ensure similarity in petrophysical sense of modelled media to Liège Chalk by match

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14

Li, Liangmou, Igor Shikhov, Yong Zheng, and Christoph Hermann Arns. "Experiment and simulation on NMR and electrical measurements on Liège Chalk." Diffusion fundamentals 22 (2014) 6, S. 1-7, 2014. https://ul.qucosa.de/id/qucosa%3A13486.

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Liège Chalk is a limestone of considerable commercial interest to the petroleum industry and formation factor a quantity required in this context. In this work we compare the formation factors based on electrical conductivity and diffusional displacement in a long time limit both experimentally and numerically. Measurements are performed on Liège Chalk samples while simulations are performed on two model structures represented by randomly packed ellipsoids and utilizing a Gaussian random field approach. We ensure similarity in petrophysical sense of modelled media to Liège Chalk by match

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15

Al-Mahrooqi, Sultan Hamed. "Laboratory and numerical investigation of NMR relaxation measurements to study reservoir wettability." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414436.

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16

Lai, Wai Cheu. "Spin-spin coupling measurements in solid-state NMR and applications to rhodopsin." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417982.

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17

Price, William S. "Applications of pulsed gradient spin-echo NMR diffusion measurements to solution dynamics and organization." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196800.

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The study of solution dynamics is a very fundamental area of research with wide ranging importance from physical chemistry through to the life sciences. A common theme is that the interactions which control the dynamics and organization of solutions are generally very weak. Translational diffusion provides a non-invasive, direct and natural probe of the dynamics and pulsed gradient spin-echo (PGSE) NMR is a convenient means of measuring diffusion. This paper gives a brief introduction to translational diffusion as a probe of solution dynamics and of the PGSE NMR method before presenting some

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18

Price, William S. "Applications of pulsed gradient spin-echo NMR diffusion measurements to solution dynamics and organization." Diffusion fundamentals 2 (2005) 112, S. 1-19, 2005. https://ul.qucosa.de/id/qucosa%3A14451.

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The study of solution dynamics is a very fundamental area of research with wide ranging importance from physical chemistry through to the life sciences. A common theme is that the interactions which control the dynamics and organization of solutions are generally very weak. Translational diffusion provides a non-invasive, direct and natural probe of the dynamics and pulsed gradient spin-echo (PGSE) NMR is a convenient means of measuring diffusion. This paper gives a brief introduction to translational diffusion as a probe of solution dynamics and of the PGSE NMR method before presenting some

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19

Copeman, Kayla. "Evaluating Epoxy Cure And Adhesion Strength Through Single-Sided Nmr Measurements Of Molecular Mobility." W&M ScholarWorks, 2021. https://scholarworks.wm.edu/etd/1627047854.

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Commonly used in aerospace, automotive, marine, defense, electronic, and manufacturing industries, epoxy adhesives offer advantages over mechanical joints by providing stronger and/or more flexible bonds, more uniform stress distribution, low shrinkage, and lightweight connections between materials. Determination of curing kinetics and properties of interfaces between epoxy and inorganic substrates provides insight that is useful for quality control and defect detection for such applications. Single-sided NMR provides a nondestructive and inexpensive method for probing epoxy materials and spat

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20

Melean, Y., Kathryn E. Washburn, P. T. Callaghan, and Christoph H. Arns. "A numerical analysis of NMR pore-pore exchange measurements using micro X-ray computed tomography." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-192412.

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Pore-pore relaxation exchange experiments are a recent development and hold great promise to spectrally derive length scales and connectivity information relevant for transport in porous media. However, for large pores, NMR diffusion-relaxation techniques reach a limit because bulk relaxation becomes dominant. A combination of NMR and Xray-CT techniques could be beneficial and lead to better models for regions of unresolved porosity in CT images, increasing the accuracy of image based calculations of transport properties. In this study we carry out numerical NMR pore-pore exchange experiments

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21

Vasenkov, Sergey, and Pavel Kortunov. "PFG NMR measurements of tortuosity factors for diffusion in meso- and macropores of FCC catalysts." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-197145.

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Pulsed field gradient (PFG) NMR is applied to measure self-diffusion coefficients of 1,3,5 tri-isopropyl-benzene in the particles of several industrial FCC catalysts having different systems of meso- and macropores. Relating these diffusivities to the self-diffusion coefficient of 1,3,5 tri-isopropyl-benzene in the liquid phase, the tortuosity factors for diffusion in the meso- and macropores of the particles were obtained. The values of the tortuosity factors were found to increase with a increasing volumetric fraction of the small (< 20 nm) meso- and macropores in the total intraparticle vol

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22

D’Agostino, Carmine, Geoff D. Moggridge, Lynn F. Gladden, and Mick D. Mantl. "Prediction of mutual diffusion coefficients in non-ideal binary mixtures from PFG-NMR diffusion measurements." Diffusion fundamentals 20 (2013) 109, S. 1-2, 2013. https://ul.qucosa.de/id/qucosa%3A13698.

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23

Melean, Y., Kathryn E. Washburn, P. T. Callaghan, and Christoph H. Arns. "A numerical analysis of NMR pore-pore exchange measurements using micro X-ray computed tomography." Diffusion fundamentals 10 (2009) 30, S. 1-3, 2009. https://ul.qucosa.de/id/qucosa%3A14125.

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Pore-pore relaxation exchange experiments are a recent development and hold great promise to spectrally derive length scales and connectivity information relevant for transport in porous media. However, for large pores, NMR diffusion-relaxation techniques reach a limit because bulk relaxation becomes dominant. A combination of NMR and Xray-CT techniques could be beneficial and lead to better models for regions of unresolved porosity in CT images, increasing the accuracy of image based calculations of transport properties. In this study we carry out numerical NMR pore-pore exchange experiments

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24

Vasenkov, Sergey, and Pavel Kortunov. "PFG NMR measurements of tortuosity factors for diffusion in meso- and macropores of FCC catalysts." Diffusion fundamentals 1 (2005) 2, S. 1-11, 2005. https://ul.qucosa.de/id/qucosa%3A14484.

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Pulsed field gradient (PFG) NMR is applied to measure self-diffusion coefficients of 1,3,5 tri-isopropyl-benzene in the particles of several industrial FCC catalysts having different systems of meso- and macropores. Relating these diffusivities to the self-diffusion coefficient of 1,3,5 tri-isopropyl-benzene in the liquid phase, the tortuosity factors for diffusion in the meso- and macropores of the particles were obtained. The values of the tortuosity factors were found to increase with a increasing volumetric fraction of the small (< 20 nm) meso- and macropores in the total intraparticle vol

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25

D’Agostino, Carmine, Geoff D. Moggridge, Lynn F. Gladden, and Mick D. Mantl. "Prediction of mutual diffusion coefficients in non-ideal binary mixtures from PFG-NMR diffusion measurements." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184023.

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26

Musu, Junita Trivianty. "Relationship between reservoir properties and NMR measurements : examples from Tirrawarra sandstone, Cooper Basin, South Australia." Title page, abstract and contents only, 2000. http://web4.library.adelaide.edu.au/theses/09SM/09smm991.pdf.

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27

Bellomo, Giovanni. "MR spectroscopy in human prostate: in vitro and in vivo measurements to optimize new quantification algorithms." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9259/.

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Il cancro della prostata (PCa) è il tumore maligno non-cutaneo più diffuso tra gli uomini ed è il secondo tumore che miete più vittime nei paesi occidentali. La necessità di nuove tecniche non invasive per la diagnosi precoce del PCa è aumentata negli anni. 1H-MRS (proton magnetic resonance spectroscopy) e 1H-MRSI (proton magnetic resonance spectroscopy imaging) sono tecniche avanzate di spettroscopia in risonanza magnetica che permettono di individuare presenza di metaboliti come citrato, colina, creatina e in alcuni casi poliammine in uno o più voxel nel tessuto prostatico. L’abbondanza o l’

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28

Smith, Andrew Christopher. "A study of phase separation in isotopic mixtures of solid helium using NMR and pressure measurements." Thesis, Royal Holloway, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398224.

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29

Junker, Friedhelm. "Materialforschung an porösen Festkörpern mittels Xenon-Diffusionsmessungen: eine 129Xe-PFG-NMR-Studie - Material research in porous solids via xenon diffusion measurements: a 129 Xe PFG NMR study." Gerhard-Mercator-Universitaet Duisburg, 2001. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05212001-091949/.

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This thesis describes the measurement of xenon diffusion coefficients in porous media via Pulsed Field Gradient (PFG) NMR spectroscopy. The thesis includes the characterization of a phase seperated polymer blend (PP/EPDM) in comparison to the pure components, the characterization of a number of commercially available semi-crystalline polymers and the characterization of a new microporous solid catalyst (silconimidonitride) with three different pore sizes by the diffusional behaviour of xenon in these materials. In addition to that a new theory is described which correlates the chemical shift o

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30

de, Oliveira Fredi André Roberto. "New applications of covariance NMR and experimental development for measurements of homonuclear coupling constants in overlapping signals." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/565884.

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Los resultados experimentales obtenidos en esta tesis están presentados en la forma de 3 artículos científicos publicados en revistas científicas especializadas na área de Resonancia Magnética Nuclear (RMN). Dos artículos con el uso de Covariancia de RMN como un general método para obtener espectros de pRMN. El último trabajo describe un nuevo experimento llamado de selTOCSY G-SERF para medir JHH en señales solapadas. Publicación 1 describe un método general para generar espectros de psRMN por Covariancia de RMN. Este nuevo enfoque es único en la espectroscopia de RMN; dando una manera barat

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31

Harvey, Pierre Dominique. "Applications of vibrational spectroscopy and NMR spin-lattice relaxation time measurements to organometallic and organic molecular crystals." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=73986.

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32

Dunkhorst, Kirsten. "Diffusionsmessungen an Polyethylenglykolen mittels PFG-NMR-Spektroskopie und dynamischer Lichtstreuung / Diffusion measurements of poly(etylene glycol) in solution by Pulsed Field Gradient NMR spectroscopy and Dynamic Light Scattering." Gerhard-Mercator-Universitaet Duisburg, 2005. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05052005-170324/.

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The Pulsed Field Gradient (PFG) NMR spectroscopy was uesd to determine, via the diffusion coefficient, the molecular weights and the molecular weight distributions for sampels of poly(etylene glycol) (PEG) in D2O. Additional it was investigated, whether the components of mixtures of poly(ethylene glycol) with different molecular weights could be quantitatively determined by the differences in diffusion coefficient. The results of this study are compared with the result of the Dynamic Light Scattering (DLS) technique, the standard methode for the determination of molecular weights. The PFG NMR

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33

Adriaensen, H. "Dynamic spatially resolved unilateral NMR measurements of liquid ingress and vapour adsorption and desorption in heterogeneous layered fabrics." Thesis, Nottingham Trent University, 2010. http://irep.ntu.ac.uk/id/eprint/193/.

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This thesis presents investigations of liquid ingress and vapour uptake in different porous media including textile fabrics and activated carbons, monitored by means of a unilateral NMR instrument. The aim of this work is to assess protective materials which prevent toxic liquid ingress and toxic vapour uptake from contaminating materials and personnel. A high performance fabric made of a combination of coated and not coated fibres can provide extremely high protection against toxic liquids. By incorporating an adsorbent layer between two highly repellent layers, an “intelligent” fabric that c

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34

Tambio, Sacris Jeru. "Evaluation of electrochemical performance of lithium-ion batteries and measurements of their transport properties by high-field NMR." Thesis, Nantes, 2019. http://www.theses.fr/2019NANT4074.

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Les applications automobiles des batteries lithium-ion exigent deux caractéristiques principales : le kilométrage (énergie) et le couple (puissance). La demande en énergie peut être facilement obtenue en augmentant le grammage des électrodes. Cependant, la puissance souffre du fait que l'épaisseur accrue des électrodes augmente la longueur du trajet pour le transport des ions, ce qui constitue le principal facteur limitant pour un fonctionnement correct à des densités de courant élevées. Cette étude traite de l’influence des paramètres d'électrode sur les performances électrochimiques, en part

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35

Markovic, Strahinja. "Application of LF-NMR measurements and supervised learning regression methods for improved characterization of heavy oils and bitumens." Thesis, Curtin University, 2022. http://hdl.handle.net/20.500.11937/89363.

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This work studies the physicochemical properties of unconventional hydrocarbon resources such as heavy oils and bitumens. The principal methods used in the research consisted of LF-NMR experiments, hypothesis testing, and statistical and data-driven modeling. The research output consists of several machine learning and analytical models capable of predicting heavy oil and bitumen viscosity and core sample water saturation with high accuracy. These results provide a strong case for in-situ LF-NMR applications in well logging.

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36

Pahlke, Hannes, Burkhard Geil, Danuta Kruk, and Franz Fujara. "The working range of static field gradient NMR illustrated by measurements of the intracrystalline diffusion of water in NaA-zeolites." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194906.

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Pahlke, Hannes, Burkhard Geil, Danuta Kruk, and Franz Fujara. "The working range of static field gradient NMR illustrated by measurements of the intracrystalline diffusion of water in NaA-zeolites." Diffusion fundamentals 3 (2005) 26, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14317.

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Regan, David Gabriel. "NMR DIFFUSION MEASUREMENTS OF COMPARTMENTALIZED AND MULTICOMPONENT BIOLOGICAL SYSTEMS: Studies of Tropoelastin, the Self Association of N Methylacetamide, and q-Space Analysis of Real and Model Cell Suspensions." University of Sydney. School of Molecular and Microbial Biosciences, 2002. http://hdl.handle.net/2123/514.

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Molecular diffusion is an inherent feature of all fluid systems. The processes and interactions that characterize these systems are in some way dependent upon the mobility of the component molecules. Pulsed field-gradient spin-echo nuclear magnetic resonance (PGSE NMR) is a powerful tool for the study of molecular diffusion; for heterogeneous systems, such as those typically found in biology, this technique is unsurpassed in the diversity of systems that yield to its probing. The aim of the work presented in this thesis was to use an integrated NMR-based approach, in conjunction with computer

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39

Kubásek, Ondřej. "Měření doběhu gradientních magnetických polí v MR tomografu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218551.

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The objective of my thesis is to measure magnetic field gradient decay in an MR tomograph, process and evaluate the data measured and analyse the issue. The theoretical section focuses on the reasons for the gradient distortion which has a negative impact on NMR measuring techniques and it also describes options to eliminate the negative effects, focusing mainly on pre-emphasis filtration. It also lists methods of gradient magnetic field measuring. The practical section contains results of magnetic field decay measurements taken with the tomograph in the Institute of scientific instruments of

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40

Bowtell, R. W. "Spatially localised NMR parameter measurement." Thesis, University of Nottingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381096.

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Cawley, M. G. "Measurement of T1Ì² in NMR imaging." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379014.

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42

Does, Mark D. "Measurement of water-NMR relaxation in peripheral nerve." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq22976.pdf.

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Regan, David G., Konstantin I. Momot, Penny J. Martens, Philip W. Kuchel, and Laura Poole-Warren. "NMR measurement of small-molecule diffusion in PVA hydrogels." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194358.

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Hydrogels are biocompatible polymeric materials that are becoming increasingly important in biomedical applications, such as drug delivery and tissue engineering. Understanding of small-molecule diffusion in these systems is important in the contexts of controlled drug release; transport of nutrients (e.g., O2 and growth factors) into the gel; and transport of cellular waste out of the gel. In this work, the diffusion coefficient of the aromatic amino acid phenylalanine (Phe) in non-crosslinked and crosslinked poly(vinyl alcohol) (PVA) hydrogels was measured using two NMR diffusion methods, CO

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Mattila, S. (Sampo). "Measurement and minimization of field inhomogeneities in high resolution NMR." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:9514264762.

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Abstract In this work, the homogeneity of both the B0 and B1 fields was studied. Both B0 and B1 field homogeneities are the basic assumptions of high resolution liquid state NMR. Although some inhomogeneity of both of the fields is always present, the spectrometers can be operated, with the help of the developed spectral purging techniques, without giving any thought to the field inhomogeneities or the necessary actions to minimize their adverse effects. Although the effect of B0 inhomogeneity can occasionally be seen, the B1 fieldin a modern probe head is often assumed to be sufficiently homo

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45

Rath, Parthasarathi. "Structural and functional characterization of PorA and PorH : the two major porins from Corynebacterium glutamicum." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1856/.

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PorA (5 kDa) et PorH (7kDa) sont les deux protéines membranaires majeures de la membrane externe de Corynebacterium glutamicum qui appartient au groupe supragénérique des bactéries Gram-positives contenant plusieurs agents pathogènes i. E. Mycobacterium tuberculosis, M. Leprae et C. Diphtheriae. Les deux protéines forment des canaux ioniques hétéromériques et présentent la particularité d'avoir une modification post-traductionnelle : estérification par l'acide mycolique. Les deux protéines ont été produites dans deux systèmes d'expression : chez C. Glutamicum et dans un système acellulaire uti

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Trempe, Jean-François. "Measurement and interpretation of residual anisotropic interactions in biomelecular NMR." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79148.

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Residual dipolar couplings have been introduced recently as a new type of experimental constraints in biomolecular structure determination by nuclear magnetic resonance (NMR). These interactions are obtained by imparting weak orientational ordering to a biomolecule in a dilute liquid crystal. This results in a partial cancellation of anisotropic interactions such as the chemical shift anisotropy (CSA), the quadrupolar coupling and the dipolar coupling. Because the alignment is weak, only strong interactions manifest. These measurements can be used to refine structure or to define folds

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Boxerman, Jerrold L. (Jerrold Lee). "Non-invasive measurement of physiology using dynamic susceptibility contrast NMR imaging." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11906.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1995.<br>Includes bibliographical references (leaves 252-274).<br>by Jerrold Lee Boxerman.<br>Ph.D.

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Nturambirwe, Jean Frederic Isingizwe. "Non-destructive measurement of internal fruit quality using SQUID-NMR techniques." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71801.

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Thesis(MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The SQUID-NMR technique has been increasingly recommended by many researchers as holding a lot of potential, and it is believed it will become an invaluable tool for non-destructive evaluation in the future. Most of its potential is yet to be exploited. Non-destructive quality control of food products is one of the applications where such a system is being tried. Much of the progress that has been made in improving such a system to the present degree of user friendliness and cost effectiveness shows that, with more effor

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Jones, Brian George. "¹⁹F NMR sensors for the measurement of pH in biological systems." Thesis, University of Bath, 1995. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296327.

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Bayer, A. "The use of Tâ‚/Tâ‚‚-relaxation effects for NMR flow sensors in multiphase flow." Thesis, Cranfield University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359385.

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