Sökning: "polyvinylpyrrolidone"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet polyvinylpyrrolidone.

  1. 1. Functional Copolymers of Polyvinylpyrrolidone

    Författare :Jonas Engström; Chalmers University of Technology; []
    Nyckelord :suspension polymerization; functional monomers; 1-vinylpyrrolidin-2-one; copolymerization; swelling; crosslinking; solid-phase synthesis; drug delivery vehicles.; phase-selective solubility; beads; Polyvinylpyrrolidone;

    Sammanfattning : In many ways, polyvinylpyrrolidone (PVP) has a unique combination of chemical and physical properties. Unlike most polymers it is soluble in water as well as a number of organic solvents. PVP also has excellent film forming properties, outstanding chemical stability, complexing ability, low toxicity, and good adherence to many different substrates. LÄS MER

  2. 2. Improving selectivity in protein extraction by subtle interactions and environmental changes

    Författare :Sheryl Fernandes; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Difference Spectroscopy; Circular dichroism; Biotechnology; Bioteknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Fluorescence spectroscopy; Metal ions; Cibacron blue; Polyvinylpyrrolidone; Polyethylene glycol; Triton X-114; His 6 tag; Cold-active ß-lactamase; Cold-active ß-galactosidase; Lactate dehydrogenase; Cutinase; Affinity Extraction; Conformational change; Partial Denaturation; Molecular interaction; Aqueous two-phase systems; Detergent foam;

    Sammanfattning : The challenges for efficient bioprocesses lie in developing and adapting further current technologies or in creating innovative separation technologies. The thesis is based on the studies on protein recovery from crude feedstocks by extraction in aqueous two-phase systems and detergent foam, respectively. LÄS MER

  3. 3. Shape Control Synthesis and Microstructure Studies of Metal Nanoparticles

    Författare :Xin Wen; Chalmers University of Technology; []
    Nyckelord :transmission electron microscopy; polyvinylpyrrolidone; seed mediated growth; palladium nanodendrite; hexadecyltrimethylammonium chloride; Gold nanorod; sodium oleate; hexadecyltrimethylammonium bromide;

    Sammanfattning : Metal nanoparticles have been extensively studied in recent years due to their unique chemical, biological and physical properties. Gold (Au) and palladium (Pd) nanoparticles are two of the most popular materials because Au nanoparticles have a strong localized surface plasmon resonance effect and Pd nanoparticles have high hydrogen adsorption and chemical catalytic capacities. LÄS MER

  4. 4. Synthesis and characterization of Pd nanoparticles for plastic plasmonic sensing applications

    Författare :Alicja Stolas; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; hydrogen sensing; nanoparticles; plasmon resonance; polymers;

    Sammanfattning : It is well known that hydrogen mixed with air forms a highly flammable mixture. There is an urgent need for selective and accurate sensors, since hydrogen very often serves as a fuel or energy storage medium. Given the fact that even the smallest leak can lead to an explosion, it is very important for sensors to be reliable and safe, i.e. LÄS MER

  5. 5. Properties of stabilizers in colloidal dispersions

    Författare :Catherine Boissier; Chalmers University of Technology; []
    Nyckelord :surfactants; conformation; polymers; NMR relaxometry; exchange dynamics; residence times; adsorption; polymer-surfactant interaction; NMR diffusometry;

    Sammanfattning : Surfactants and polymers are frequently used as stabilizers in colloidal dispersions. Depending on their solubility and the interactions in their local environment, their tendency to remain adsorbed on a surface will differ. LÄS MER