Sökning: "NMR probe"

Visar resultat 1 - 5 av 33 avhandlingar innehållade orden NMR probe.

  1. 1. Nuclear Magnetic Relaxation in Micellar Solution and Lyotropic Liquid Crystals. Tools and Applications

    Detta är en avhandling från Stockholm : Kemi

    Författare :Ruslan Sitnikov; [2000]
    Nyckelord :NMR; NMR relaxation dispersion; NMR spectrometer; low NMR frequencies; NMR duplexer; NMR preamplifier; NMR lock; surfactant systems; micellar solutions; lyotropic liquid crystals; cubic mesophase;

    Sammanfattning : Structurally, this Thesis is divided into two parts thatdescribe (i) the hardware development for NMR relaxationstudies and (ii) its applications for studies of the surfactantsystems.The developed hardware solutions allow to expand thefrequency range covered by conventional NMR spectrometers tomake NMR experiments feasible at resonance frequencies down to100 kHz. LÄS MER

  2. 2. NMR Studies of Colloidal Systems in and out of Equilibrium

    Detta är en avhandling från Stockholm : KTH

    Författare :Pavel V. Yushmanov; Peter Stilbs; Terence Gosgrove; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stopped-flow NMR; temperature-jump NMR; crossrelaxation; NMR; NMR probe; fluorosurfactant; micellar kinetics; micellar structure; NATURAL SCIENCES Chemistry Physical chemistry; NATURVETENSKAP Kemi Fysikalisk kemi;

    Sammanfattning : The Thesis describes (i) the development of add-on instrumentation extending the capabilities of conventional NMR spectrometers and (ii) the application of the designed equipments and techniques for investigating various colloidal systems. The new equipments are:Novel designs of stopped-flow and temperature–jump inserts intended for conventional Bruker wide-bore superconductive magnets. LÄS MER

  3. 3. Characterizing ions in solution by NMR methods

    Detta är en avhandling från Stockholm : KTH

    Författare :Marianne Giesecke; István Furó; Peter Griffiths; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electrophoretic NMR; diffusion NMR; NMR imaging; ion pairing; ion association; polyethylene oxide; metal-ion complex; Li ion batteries; electrolyte characterization; Kemi; Chemistry;

    Sammanfattning : NMR experiments performed under the effect of electric fields, either continuous or pulsed, can provide quantitative parameters related to ion association and ion transport in solution.  Electrophoretic NMR (eNMR) is based on a diffusion pulse-sequence with electric fields applied in the form of pulses. LÄS MER

  4. 4. Molecular Interactions Studied by Electrophoretic and Diffusion NMR

    Detta är en avhandling från Stockholm : KTH

    Författare :Fredrik Hallberg; Peter Stilbs; István Furó; Gareth Morris; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; NMR; electrophoretic NMR; Ion pairing; complexation; association; diffusion; pulsed field gradient; Nafion; NATURAL SCIENCES Chemistry Physical chemistry Spectroscopy; NATURVETENSKAP Kemi Fysikalisk kemi Spektroskopi;

    Sammanfattning : Even though electrophoretic NMR (eNMR) experiments may provide unique chemical information and have been performed for three decades, the technique is still rarely applied, mainly because several experimental sources of artifacts have to be controlled to achieve accurate results. In this thesis, new experimental setups and protocols for accurate and precise eNMR experiments are presented. LÄS MER

  5. 5. Mass Transport Properties in Supramolecular Systems Studied by Diffusion and Relaxation NMR

    Detta är en avhandling från Stockholm : KTH

    Författare :Patrik Jarvoll Dae; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NMR; T2; diffusion; hydrogel; exchange dynamics; T1; magnetic susceptibility; organosilica nanoparticles; microstructure; relaxation; supramolecular systems;

    Sammanfattning : This thesis shows how diffusion and relaxation NMR can be applied in various aspects to study mass transport in supramolecular systems. Information about these systems can be obtained, either by direct measurement of the molecules that are incorporated in a supramolecular structure, or via probe molecules, which indirectly gives information about the system. LÄS MER