Sökning: "paramagnetic relaxation"

Visar resultat 21 - 25 av 31 avhandlingar innehållade orden paramagnetic relaxation.

1. 21. Membrane interactions of glycosyltransferases

   Författare :Jobst Liebau; Lena Mäler; Christofer Lendel; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lipid; bicelle; glycosyltransferase; NMR; Biophysics; biofysik;

   Sammanfattning : Many important biological processes occur near or in membranes. The role of membranes is not merely confined to compartmentalization, they also form the matrix for membrane associated proteins and are of functional importance. Membrane associated proteins on the other hand require specific membrane properties for proper function. LÄS MER

3. 22. The Utility of Manganese for Magnetic Resonance Imaging of Transient Myocardial Ischemia

   Författare :Rolf Eriksson; Håkan Ahlström; Tomas Bjerner; Håkan Arheden; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiology; Radiologisk forskning; Radiological research; Radiologisk forskning; radiologi; Radiology;

   Sammanfattning : In order to improve the diagnosis of coronary artery disease, better methods for detection of myocardial perfusion defects would be useful. One of the methods used for myocardial perfusion evaluation today is magnetic resonance imaging. LÄS MER

4. 23. Evaluation of the Dual-Modal usage of contrast agents by means of Synchrotron X-ray Computed Microtomography and Magnetic Resonance Imaging using Macrophages loaded with Barium Sulfate and Gadolinium Nanoparticles for Detection and Monitoring in Animal Disease Models

   Författare :Emanuel Larsson; Kajsa Uvdal; Agostino Accardo; Giuliana Tromba; Albert E. Siegbahn; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Sammanfattning : ¨This thesis focuses on evaluating the dual-modal Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) capabilities of contrast agents. For such purposes a gadolinium based contrast agent is of high interest, due to its paramagnetic properties, which while present inside a magnetic field will hence interact with the protons spins of water (in tissue and fat) and shorten their the T1 relaxation time, thereby creating a positive image contrast in MRI. LÄS MER

5. 24. Growth and Magnetic Properties of Fe- and FeNi-based Thin Films and Multilayers

   Författare :Anna Maria Blixt; Björgvin Hjörvarsson; Gabriella Andersson; Panagiotis Poulopoulos; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Sputter growth; Permalloy; Multilayer; Superlattice; Magnetism; Fysik; Physics; Fysik;

   Sammanfattning : This thesis concerns the growth and magnetic properties of thin films and multilayers. The samples were grown by magnetron sputtering, and characterized structurally mainly by x-ray diffraction and reflectivity. LÄS MER

7. 25. Metal Oxide Nanoparticles for Contrast Enhancement in Magnetic Resonance Imaging : Synthesis, Functionalization and Characterization

   Författare :Maria Ahrén; Kajsa Uvdal; Jan Kehr; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : This thesis work focuses on the design and production of nanoparticle based contrast agents for signal enhancement in magnetic resonance imaging (MRI). Three different synthesis routes are explored, primarily to produce crystalline gadolinium oxide (Gd2O3) nanoparticles, and surface modification is done to obtain stable, dispersible, biocompatible probes inducing high proton relaxivities. LÄS MER