Sökning: "exchange interactions."

Visar resultat 1 - 5 av 257 avhandlingar innehållade orden exchange interactions..

  1. 1. DNA strand exchange and hydrophobic interactions between biomolecules

    Författare :Bobo Feng; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ATP synthase; DNA; membrane proteins; linear dichroism; Hydrophobic interactions; self-assembly; strand exchange; nanotechnology; liposomes;

    Sammanfattning : The role of hydrophobic interactions in DNA strand exchange has been studied using fluorescence-labeled DNA oligomers in a FRET assay. Strand exchange was found to be accelerated in the presence of polyethylene glycol, which provides a crowded and hydrophobic environment possibly mimicking that of the catalytically active recombinase-DNA complexes. LÄS MER

  3. 2. Electronic structure and exchange interactions from ab initio theory : New perspectives and implementations

    Författare :Ramon Cardias Alves de Almeida; Olle Eriksson; Anders Bergman; Attila Szilva; R. B. Muniz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ab initio; exchange interactions; non-collinear magnetism; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : In this thesis, the magnetic properties of several materials were investigated using first principle calculations. The ab initio method named real space linear muffin-tin orbitals atomic sphere approximation (RS-LMTO-ASA) was used to calculate the electronic structure and magnetic properties of bulk systems, surface and nanostructures adsorbed on surfaces. LÄS MER

  4. 3. Modulating magnetic interactions : in metamaterials and amorphous alloys

    Författare :Nanny Strandqvist; Björgvin Hjörvarsson; Alexei Vorobiev; Sean Langridge; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic metamaterials; interlayer exchange coupling; superlattice; mesospins; magnetic nanostructures; emergence; amorphous alloys; CoAlZr; FeZr; Fysik; Physics;

    Sammanfattning : This thesis is focused on exploring and modulating magnetic interactions in metamaterials and amorphous alloys along one-, two-, and three-dimensions. First, thin films of alternating Fe and MgO are adapted to modulate magnetic interactions along one dimension. LÄS MER

  5. 4. Fångar i ett nätverk? : Fängelser, interaktioner och medbrottslingsskap

    Författare :Lena Roxell; Jerzy Sarnecki; Eva Tiby; Britta Kyvsgaard; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; prisons; inmates; interactions; co-offending; networks; gangs; prison gangs; Criminology; Kriminologi; kriminologi; Criminology;

    Sammanfattning : The objective of the thesis is to study how contacts/relationships are established in prison, and whether this is of significance for co-offending. A further objective is that of studying co-offending among individuals classified as gang members. LÄS MER

  7. 5. Modelling biomolecular interactions

    Författare :Johan Bredenberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Computational chemistry; molecular dynamics; nuclear receptors; force field parameterization; zinc fingers; DNA; proteins.;

    Sammanfattning : Computational approaches for understanding and aiding in molecular biology has increased in significance over the last decades, where a wealth of biochemical experiments have provided a solid ground for developing computer models that can be used to predict unresolved issues within biology. Molecular dynamics (MD) is one of these methods, based on classical laws, and suitable for handling large macromolecules in their natural environment, water. LÄS MER