Sökning: "Microspheres"

Visar resultat 21 - 25 av 64 avhandlingar innehållade ordet Microspheres.

  1. 21. Preparation and characterisation of biodegradable microspheres for the delivery of bioactive compounds

    Författare :Cecilia Sturesson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmacy; FARMACI; PHARMACY; FARMACI; galenisk farmaci; Pharmaceutics;

    Sammanfattning : The incorporation of bioactive compounds into biodegradable polymer microspheres has several advantages. Firstly, the drug substance is protected from physiological degradation. Secondly, using microspheres from polymers with different degradation mechanisms, it is possible to design different release profiles with desired release rates. LÄS MER

  3. 22. Exploring bio-based and biodegradable polymers: free-radical polymerization, hydrolysis and applications

    Författare :Maryam Mousa; Eva Malmström; Magnus Jonsson; Anna Larsson Kron; Seema Agarwal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Bio-based polymers; biodegradation; branched polyesters; thermally expandable microspheres; copolymerization; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Increasing concerns regarding the depletion of fossil-based resources and theaccumulation of plastic waste in the environment have resulted in extensiveresearch aimed at finding more sustainable alternatives to today’s plastics.In this work, bio-based and biodegradable polymers have been synthesizedusing free-radical polymerization in homogeneous and heterogeneoussystems. LÄS MER

  4. 23. Nitride fuel production by the internal sol gel process

    Författare :Marcus Hedberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nitride fuels; ZrN; internal sol gel;

    Sammanfattning : AbstractDuring operation of a fourth generation reactor system it is necessarily not desirable to utilize an oxide fuel matrix as in light water reactor systems. One type of chemical compounds that has been suggested is nitride based nuclear fuel. LÄS MER

  5. 24. Physical, Chemical and Biochemical Modifications of Industrial Softwood Kraft Lignin for Different Applications

    Författare :Miao Wang; Jiebing Li; Mikael Lindström; Elisabeth Sjöholm; Gunnar Westman; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry;

    Sammanfattning : Various technical lignins, e.g. industrial Softwood Kraft lignin (SKL), are now largely available while they are generally underutilized due to their heterogeneous and complicated structures and/or the poor properties. LÄS MER

  7. 25. Phase Phenomena in Polymer Networks : Empirical Studies on the Influence of Hydrophobicity, Charge Density and Crosslinks on Macroion-Induced Phase Transitions in Polyelectrolyte Gels

    Författare :Martin Andersson; Per Hansson; Lennart Piculell; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Gel; microgel; microsphere; polystyrenesulfonate; polyacrylate; polyacrylicacid; DoTAB; DoTAC; CTAB; CTAC; network; polyelectrolyte; complex salt; self assembly; phase behaviour; hysteresis; thermodynamic; core-shell; lysozyme; cytochrome c; microscopy; micromanipulator; elastomer; elastic; protein; surfactant; phase behaviour; sorting; PHARMACY; FARMACI; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : The thesis concerns polyelectrolyte gels in contact with oppositely charged proteins and surfactant micelles, and includes of four papers (I-IV). In paper I confocal Raman spectroscopy was introduced as a method to trace micelles and investigate the structure of gel-surfactant complexes, in phase separated gel spheres. LÄS MER