Search for dissertations about: "pvp"

Showing result 1 - 5 of 22 swedish dissertations containing the word pvp.

  2. 1. Engineering of Pharmaceutical Particles : Modulation of Particle Structural Properties, Solid-State Stability and Tabletting Behaviour by the Drying Process

    Author : Jonas Berggren; Göran Alderborn; Graham Buckton; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutics; particle engineering; microcrystalline cellulose pellets; intragranular porosity; convective drying; tabletting behaviour; spray-dried composite particles; amorphous lactose; PVP; heat and moisture-induced crystallisation; glass transition temperature; Galenisk farmaci; Pharmaceutics; Galenisk farmaci; galenisk farmaci; Pharmaceutics;

    Abstract : Relationships between stresses during the drying process, particle structural and functional properties, and particle engineering by the drying process were addressed in this thesis. In the first part, the importance of the drying phase and the effect of the drying rate on the intragranular porosity of microcrystalline cellulose pellets were investigated. READ MORE

  4. 2. Spectroscopic studies of solvation and adsorption properties of PVP

    Author : Ildikó Száraz; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Abstract : The adsorption mechanism of 1-vinyl-2-pyrrolidone (VP), poly(1-vinyl-2- pyrrolidone) (PVP) and azelaic acid on synthetic gamma-aluminium oxide surfaces was investigated using FT-IR, FT-Raman, UV, 1H and 13C NMR spectroscopy. (Liquid-solid state) As a first step the solvation of VP and PVP in solvents of varying polarity, specifically water, ethylene glycol (EG), chloroform and carbon tetrachloride, was studied. READ MORE

  5. 3. On antimicrobial approaches to arrest and control chronic periodontitis

    Author : Maj-Karin Hellström; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Plaque control; microorganisms; magnolia; dentifrice; gingivitis; PVP iodine; maintenanc; tetracycline; minocycline;

    Abstract : The main objectives were to study the effect of frequently repeated supragingival plaque removal on the subgingival microbiota and periodontal pocket reduction and to analyze the adjunctive effect of different antimicrobial agents on the treatment of periodontal disease. Subjects with gingivitis or chronic periodontitis were included. READ MORE

  6. 4. γ-Radiation Induced Synthesis of Metal oxides : Control of Particle Size, Composition, and Morphology

    Author : Zhuofeng Li; Mats Jonsson; Hynd Remita; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; γ-radiation induced synthesis; Metal oxide nanoparticles; Metal oxide nucleation; Mesocrystal formation; Carbon black reactivity towards radical; PVP nanogel.;

    Abstract : Nanomaterials show a significant difference in chemical, mechanical, electronic, magnetic and optical properties compared with bulk counterparts. The synthesis is a key-step to achieve the unique properties of nanomaterials. READ MORE

  7. 5. Functional Copolymers of Polyvinylpyrrolidone

    Author : Jonas Engström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; suspension polymerization; functional monomers; 1-vinylpyrrolidin-2-one; copolymerization; swelling; crosslinking; solid-phase synthesis; drug delivery vehicles.; phase-selective solubility; beads; Polyvinylpyrrolidone;

    Abstract : 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. READ MORE