Search for dissertations about: "relaxation"

Showing result 1 - 5 of 738 swedish dissertations containing the word relaxation.

  1. 1. Theory of water-proton spin relaxation in complex biological systems

    University dissertation from Lund University (Media-Tryck)

    Author : Zhiwei Chang; Lund University.; Lunds universitet.; [2017-05-22]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; spin relaxation theory; immobilized macromolecules; magnetic relaxation dispersion; integral longitudinal relaxation rate; stochastic Liouville equations; multi-spin systems; cross-mode relaxation; spectral density functions;

    Abstract : In complex biological systems (e.g. gels, cross-linked proteins and biological tissues), the longitudinal spin relaxation of water protons is primarily induced by exchange-mediated orientational randomization (EMOR) of intra- and intermolecular magnetic dipole-dipole couplings. READ MORE

  2. 2. Zero-Field Splitting in Gd(III) complexes Towards a molecular understanding of paramagnetic relaxation

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Shehryar Khan; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Zero-Field Splitting; Relaxation; Quantum Chemistry; Molecular Dynamics; Gd III ; kemisk fysik; Chemical Physics;

    Abstract : The prime objectives of contrast agents in Magnetic Resonance Imaging(MRI) is to accelerate the relaxation rate of the solvent water protons in the surrounding tissue. Paramagnetic relaxation originates from dipole-dipole interactions between the nuclear spins and the fluctuating magnetic field induced by unpaired electrons. READ MORE

  3. 3. Probing Dynamics of Oligosaccharides by Interference Phenomena in NMR Relaxation

    University dissertation from Stockholm : Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi

    Author : Leila Ghalebani; Stockholms universitet.; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NMR; sugars; oligosaccharides; carbon-13 relaxation; cross-correlated relaxation; molecular dynamics; internal motion; random jumps; PRE; paramagnetic relaxation; MEDICINE Chemistry; MEDICIN Kemi; fysikalisk kemi; Physical Chemistry;

    Abstract : Oligosaccharides (carbohydrates) are a large class of biological molecules that are important as energy sources in the human body and have enormously varied biological functions. It is generally believed that biological activities of carbohydrates are related to their internal dynamics. READ MORE

  4. 4. Paramagnetic relaxation reagents nuclear magnetic resonance studies of preferential solvation

    University dissertation from Umeå : Umeå universitet

    Author : Hans Grahn; Umeå universitet.; [1986]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The interactions between neutral paramagnetic relaxation reagents (PARR's) and certain aromatic compounds have been studied by 1H and 13 C spin-lattice relaxation time measurements. In media such as cyclohexane and carbon tetrachloride, Cr(acac)3 becomes preferentially solvated by aromatic solutes. READ MORE

  5. 5. Recurrent Headache among Swedish Adolescents Psychosocial Factors, Coping and Effects of Relaxation Treatment

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Åsa Fichtel; Uppsala universitet.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nursing; headache; adolescents; coping; relaxation; Omvårdnad; INTERDISCIPLINARY RESEARCH AREAS Caring sciences Nursing; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN Vårdvetenskap Omvårdnad; Caring Sciences; omvårdnadsforskning med samhällsvetenskaplig inriktning;

    Abstract : Overall aims of the present thesis were to study the prevalence and psychosocial impact of recurrent headache within a school population in comparison with other types of pain and to examine the use and efficacy of various coping strategies. Further aims were to compare the effects of relaxation treatment among adolescents with recurrent headache to a waiting-list control group, and finally to examine the efficacy of relaxation training administered in a school setting. READ MORE