Sökning: "Native defects"

Visar resultat 16 - 20 av 27 avhandlingar innehållade orden Native defects.

  1. 16. Detection and removal of traps at the SiO2/SiC interface

    Författare :Halldor Olafsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; interface states; thermally stimulated current TSC ; positron annihilation spectroscopy PAS ; silicon carbide SiC ; metal-oxide-semiconductor field-effect transistor MOSFET ; transmission electron microscopy TEM ; deep level transient spectroscopy DLTS ; metal-oxide-semiconductor MOS ; field-effect mobility; capacitance-voltage C-V ;

    Sammanfattning : The interface between silicon dioxide (SiO2) and silicon carbide (SiC) is at the heart of the SiC metal-oxide-semiconductor field-effect (MOSFET) transistor. The technology to produce a high quality SiO2/SiC interface does not exist today, hampering further development of the SiC MOSFET. LÄS MER

  3. 17. Restoration of scarred vocal folds with stem cell implantation : analyses in a xenograft model

    Författare :Bengt Svensson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: Tissue defects in the vocal fold (VF) caused by trauma, surgical procedures, post radiotherapy, often heal with scar formation. The scar tissue causes stiffness of the lamina propria rendering disturbed viscoelastic properties to the VF. A scarred VF causes severe voice problems. LÄS MER

  4. 18. Aspects of N-glycosylation in human IgE

    Författare :Johanna Da Luz; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The medical interest of allergy in industrialised societies has generated a much greater knowledge about the pathophysiology of IgE-mediated responses than about its normal physiological role. Because of the central role of IgE in allergic inflammation, neutralisation of effector functions and inhibition of IgE-synthesis are attractive means of therapy. LÄS MER

  5. 19. Removal and Replacement of Ribosomal Proteins : Effects on Bacterial Fitness and Ribosome Function

    Författare :Christina Tobin; Dan I. Andersson; Richard Buckingham; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ribosome; protein synthesis; ribosomal proteins; translation initiation; ribosome biogenesis; fitness costs; compensatory evolution; horizontal gene transfer; Microbiology; Mikrobiologi; Biochemistry; Biokemi; Mikrobiologi; Microbiology;

    Sammanfattning : Protein synthesis is a complex process performed by sophisticated cellular particles known as ribosomes. Although RNA constitutes the major structural and functional component, ribosomes from all kingdoms contain an extensive array of proteins with largely undefined functional roles. LÄS MER

  7. 20. Environmental influence on alpha-helical peptides

    Författare :Ana Caballero Herrera; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :MD alpha helix; C-peptide; membrane proteins; hydrogen bonds; packing; dynamics;

    Sammanfattning : Most proteins at physiological conditions fold into a native functional three-dimensional conformation. The stability of the Native state is a balance between different interactions within the protein and with the solvent. LÄS MER