Sökning: "amphiphilic polyelectrolytes"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden amphiphilic polyelectrolytes.

  1. 1. Polyelectrolytes on Surfaces and their Complexes with Surfactants, Thermodynamics versus kinetics

    Författare :Yulia Samoshina; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysikalisk kemi; Polymer technology; Physical chemistry; SDS; amphiphilic polyelectrolytes; ellipsometry; reversibility; kinetics of adsorption; polyelectrolytes at solid-liquid interface; polyelectrolyte-oppositely charged surfactant complexes; biopolymers; Polymerteknik;

    Sammanfattning : The interfacial properties of polyelectrolytes, mainly cationic with various content of amphiphilic groups, and their complexes with an oppositely charged surfactant, sodium dodecyl sulfate (SDS), have been investigated using time-resolved ellipsometry. This thesis focuses on the kinetics and reversibility aspects of polymer adsorption and the control of the adsorption by regulating the electrostatic interactions. LÄS MER

  3. 2. Electroactive Conjugated Polyelectrolytes Based on EDOT From Synthesis to Organic Electronics

    Författare :Roger Gabrielsson; Peter Konradsson; Olle Inganäs; David Mecerreyes; Linköpings universitet; []
    Nyckelord :Conjugated polyelectrolytes; Electroactive conjugated polyelectrolytes; Intrinsically conducting polyelectrolytes;

    Sammanfattning : Conjugated polyelectrolytes (CP) show interesting electrical and optical properties for organic electronics as well as for life science applications. Their possibilities of supramolecular assembly with nanowire like misfolded proteins, amyloids, as well as synthetic polypeptides or DNA forming conducting nano composites is highly interesting as being a truly bottom up approach for fabrication of OLEDs, photovoltaic’s as well as logic devices. LÄS MER

  4. 3. Development and characterization of an in vitro method for interaction studies between polymers and pharmaceuticals : Aiding in the development of new drug delivery systems

    Författare :Marcus Wanselius; Per Hansson; Magnus Bergström; Susanna Abrahmsén-Alami; Christian Pedersen; Anna Fureby; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Microgels; Subcutaneous administration; Drug delivery; Microfluidics; In vitro methodology; Method development; Biopharmaceuticals; Amphiphilic drugs; Polyelectrolytes; Hyaluronic acid; Peptides; Farmaceutisk fysikalisk kemi; Pharmaceutical Physical Chemistry;

    Sammanfattning : Polymers are a group of macromolecules used in formulations of pharmaceuticals, one example being the delivery system DC Bead™. Further, some of the most abundant and for drug delivery important constituents of the subcutaneous tissue are charged polymers (polyelectrolytes), e.g. collagen, hyaluronic acid, and chondroitin sulfate. LÄS MER

  5. 4. Association of Amphiphiles and Polyelectrolytes with DNA

    Författare :Yulia S Mel'nikova; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; cryo-TEM; SAXS; fluorescence microscopy; DNA condensation; DNA-polyelectrolyte; DNA- amphiphile interactions; Fysikalisk kemi;

    Sammanfattning : DNA- cationic amphiphile and DNA-cationic polymer systems were studied with respect to the intermolecular interactions, as well as structure and stability of formed complexes. The thesis is divided in two parts: one section is a summary and the other section contains five papers. LÄS MER

  7. 5. Effects of polyelectrolyte conformation, charge density and ion specificity in polyelectrolyte and polyelectrolyte-drug interaction

    Författare :Andreas M. Hugerth; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Farmaceutisk kemi; Pharmaceutical chemistry; Farmaceutisk kemi; Physical and Inorganic Pharmaceutical Chemistry; fysikalisk och oorganisk farmaceutisk kemi;

    Sammanfattning : The central theme is how the structural characteristics of sulphated polyelectrolytes and theirinteraction with counter- and coions determine the degree of polyelectrolyte self-association (gelformation), interaction with oppositely charged polyelectrolyte and polyelectrolyte-amphiphilic druginteraction in protolytic solvent medium. Such knowledge is essential for understanding and regulatingthe interaction between polyelectrolytes as well as between polyelectrolytes and a drug substance in apharmaceutical formulation and for its fate in the human organism. LÄS MER