Sökning: "relaxation mechanisms"

Visar resultat 1 - 5 av 134 avhandlingar innehållade orden relaxation mechanisms.

  1. 1. Molecular dynamics simulations of intermolecular mechanisms in nuclear spin relaxation

    Författare :Michael Odelius; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Atomfysik; Molekylfysik; Fysikalisk kemi;

    Sammanfattning : .... LÄS MER

  3. 2. Water and protein solutions studied by field-dependent magnetic relaxation

    Författare :Kristofer Modig; Biofysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; relaxation; protein solvation; protein dynamics; protein denaturation; oxytocin; magnetic relaxation dispersion; nuclear magnetic resonance; lipid-binding protein; hydration; beta-lactoglobulin; BPTI; shielding anisotropy; water; Molecular biophysics; Molekylär biofysik;

    Sammanfattning : In the work presented, nuclear magnetic resonance (NMR) relaxation is used to study wide range of systems. The thesis concerns solvent interactions studied with relaxation techniques that involve measurements at many fields, which allows the separation of individual relaxation mechanisms. LÄS MER

  4. 3. Secondary chlorophyll a luminescence decay kinetics from green algae and higher plants : mechanisms and application

    Författare :Lars-Göran Sundblad; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; luminescence; fluorescence; photosynthesis; far red; CO2 accumulation; S-states; QA; reverse coupling; qE; frost hardiness;

    Sammanfattning : Barley protoplasts were shown to be a suitable experimental system for studies on the relative maximum during the decay of luminescence observed in most photosynthetic systems after excitation with far red light and in the presence of O2. The far red induced relative luminescencemaximum was shown to be a result of three coinciding events:*Randomization of the S-states of the water splitting system during illumination with far red light. LÄS MER

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

    Författare :Åsa Fichtel; Huda Huijer Abu-Saad; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nursing; headache; adolescents; coping; relaxation; Omvårdnad; Nursing; Omvårdnad; Caring Sciences; omvårdnadsforskning med samhällsvetenskaplig inriktning;

    Sammanfattning : 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. LÄS MER

  7. 5. Degradation, Metabolism and Relaxation Properties of Iron Oxide Particles for Magnetic Resonance Imaging

    Författare :Karen Briley Saebo; Håkan Ahlström; Atle Bjørnerud; Michael Knopp; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Magnetic Resonance Imaging; contrast agents; iron oxide particles; metabolism; relaxation mechanisms; Radiologisk forskning; Radiological research; Radiologisk forskning;

    Sammanfattning : Whereas the effect of size and coating material on the pharmacokinetics and biodistribution of iron oxide based contrast agents are well documented, the effect of these parameters on liver metabolism has never been investigated. The primary purpose of this work was to evaluate the effect of iron oxide particle size and coating on the rate of liver clearance and particle degradation using a rat model. LÄS MER