Sökning: "x-ray microscopy"

Visar resultat 16 - 20 av 629 avhandlingar innehållade orden x-ray microscopy.

  1. 16. 3D X-ray microscopy: image formation, tomography and instrumentation

    Författare :Mårten Selin; Hans Hertz; Chris Jacobsen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray microscopy; image formation theory; partial coherence in imaging; wave propagation; tomography; instrumentation; Fysik; Physics;

    Sammanfattning : Tomography in soft X-ray microscopy is an emerging technique for obtaining quantitative 3D structural information about cells. One of its strengths, compared with other techniques, is that it can image intact cells in their near-native state at a few 10 nm’s resolution, without staining. LÄS MER

  3. 17. Compact Soft X-Ray Microscopy: Image Processing and Instrumentation

    Författare :Heide Stollberg; Hans Hertz; Jürgen Thieme; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray microscopy; Physics; Fysik;

    Sammanfattning : Soft x-ray microscopy is a powerful technique for natural-contrast, high-resolution imaging of organic materials. This Thesis describes new instrumentational and new image-processing methods to improve the image quality of the compact x-ray microscope at the Biomedical & X-Ray Physics division at KTH. LÄS MER

  4. 18. Structural Studies Of Materials Using Time-Resolved X-ray Diffraction

    Författare :Hengameh Allaf Navirian; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; structure of bulk crystal; x-ray diffraction; phase transition; mechanical properties; microscopy;

    Sammanfattning : This work consisted of the application of X-ray diffraction methods to the study of ultrafast phenomena in various materials. Since the X-ray pulses generated from the bending magnet at the MAX II ring, where most of the experimental work was conducted, have a duration of the order of 300 ps, they can not be used directly as probe pulses in experiments where higher temporal resolution is required. LÄS MER

  5. 19. Multiscale X-ray Characterisation of Cellulose-based Solid Dispersions

    Författare :Martina Olsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; PXCT; WAXS; pharmaceutical formulations; multiscale characterisation; STXM; radiation damage; SAXS; X-ray imaging; solid dispersions; cellulose;

    Sammanfattning : Cellulose-based solid dispersions are a promising formulation strategy for providing controlled drug release and dissolution enhancement of poorly soluble drugs. These dispersions can from structures on multiple length scales which can have both positive and negative effects on the functional properties of the formulation. LÄS MER

  7. 20. A Structural Viewpoint of Magnetism in Fe and Co Based Superlattices

    Författare :Matts Björck; Gabriella Andersson; Adrian Rennie; Thomas Hase; Uppsala universitet; []
    Nyckelord :Physics; Magnetism; Multilayer; Superlattice; X-ray magnetic circular dichroism; X-ray diffraction; X-ray reflectivity; Neutron diffraction; Structural refinement; Interfaces; Fysik;

    Sammanfattning : In order to understand the properties of thin film devices, knowledge of the material's structure is essential. The work presented here combines magnetic and structural characterization of the systems studied to gain a deeper physical understanding. LÄS MER