Sökning: "cationic molecule"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden cationic molecule.

  1. 1. X-ray spectroscopy on diatomic and cationic molecules

    Författare :Ludvig Kjellsson; Jan-Erik Rubensson; Marcus Agåker; Monica Turcato; Michael Meyer; John Bozek; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray absorption spectroscopy; resonant inelastic X-ray scattering; cationic molecule; dinitrogen; dioxygen; carbon monoxide; aqueous hydroxyl radical; lifetime-vibrational interference; RIXS; XAS; LVI; N2; O2; CO; H2O; OH;

    Sammanfattning : X-ray spectroscopy have been used to study the electronic structure of diatomic and cationic molecules. X-ray absorption spectra of the molecular cations N2+, O2+, and CO+ have been measured. LÄS MER

  3. 2. Self-assembly in Melts of Block copolymer-based Systems Featuring Supramolecular Interactions

    Författare :Mehran Asad Ayoubi; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hierarchical self-assembly; melt; block copolymer; cationic surfactant; non-ionic surfactant; supramolecular interactions; microphase separation; Linear-b-AmphComb;

    Sammanfattning : The subject of this thesis is experimental investigation of self-assembly in solvent-free (ionic) macromolecular systems that contain block copolymer chains as the basic constituent component in combination with low molecular weight amphiphiles. In particular, especial attention is paid to study thoroughly a new class of block copolymer-based ionic supramolecules, named as Linear-b-AmphComb, that feature novel hierarchical self-assembly characteristics. LÄS MER

  4. 3. Equilibrium and Kinetic Studies of the Binding of DNA to Cationic Liposomes

    Författare :Paula Barreleiro; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Small-Angle Neutron Scattering; Fluorescence; Kinetics; Stopped-Flow; Differential Scanning Calorimetry; Titration Calorimetry; Gel-to-Liquid Crystalline Phase Transition; Lamellar phase; Lipolexes; DNA; Liposomes; Cryo-TEM; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The objective of this work was to study the formation of DNA-cationic vesicle complexes (lipoplexes). These complexes are interesting not only from a fundamental point of view but also as promising candidates for gene therapy. The approach taken was to study first the cationic vesicles by themselves. LÄS MER

  5. 4. Cationic Interactions with Nucleic Acids With Focus on Anticancer Active Platinum(II) Complexes

    Författare :Åse Sykfont Snygg; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; in-line cleavage; Cisplatin; oxaliplatin; circular dichroism; DENSPM; polyamines; siRNA; pseudoknot; RNA; thermal melting; anticancer active Pt II complex; DNA;

    Sammanfattning : It is well documented that the antitumour activity of the Pt(II)-complex cisplatin, and similar anticancer active complexes, is a result of metalation of DNA, and thereby inhibition of cell proliferation. Since nucleic acids are polyanions at physiological pH, the rate of adduct formation with positively charged complex, as the hydrolyzed Pt(II) complexes studied in this work, is influenced by the ionic environment surrounding the polymer. LÄS MER

  7. 5. Immunochemical characterisation of Brucella LPS and its relation to virulence

    Författare :Enrique Freer; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Brucella abortus Brucella ovis Bacterial lipopolysaccharide LPS : LPS heterogeneity Virulence factors Cationic peptides.;

    Sammanfattning : Members of the genus Brucella are facultative intracellular pathogens which infect and produce disease in a wide variety of mammals. Although some factors have been implicated in the virulence of Brucella, the virulence mechanisms of this intracellular pathogen are not known. LÄS MER