Sökning: "molecular weight distribution."

Visar resultat 6 - 10 av 91 avhandlingar innehållade orden molecular weight distribution..

  1. 6. Electrospinning Nanofibres from Cellulose Dissolved in Ionic Liquid

    Författare :Linda Härdelin; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; dissolution; Electrospinning; molecular weight distribution.; cellulose; rheology; ionic liquids; nanofibres;

    Sammanfattning : This thesis investigates the electrospinning of cellulose nanofibres from ionic liquids. Cellulose nanofibres produced by an environmentally friendly process have the potential to replace synthetic nanofibres produced with volatile and harmful solvents. LÄS MER

  3. 7. Correlating Nanostructure and Electronic Properties of Organic Semiconductors by Electron Microscopy

    Författare :Gustav Persson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D; transmission electron microscopy; clustering; molecular dopant; nanostructure; structure-property correlation; visualisation; concentration; organic semiconductor;

    Sammanfattning : Organic semiconductors enable fabrication and efficient processing of electronic devices with light weight, mechanical flexibility and tuneable properties. Despite significant progress in the last decades, efficiencies and long-term stabilities of these systems still need to be improved. LÄS MER

  4. 8. Asymmetrical Flow Field-Flow Fractionation in the Application to Biological Macromolecules

    Författare :Cecilia Arfvidsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Analytisk kemi; Bioteknik; Biotechnology; biotechnology; recombinant protein production; molecular weight; Escherichia coli; ribosomes; glutenin; asymmetrical flow field-flow fractionation; multiangle light scattering;

    Sammanfattning : Asymmetrical flow field-flow fractionation (AsFlFFF) is especially useful in the application to biological macromolecules due to the absence of a stationary phase in the separation channel. As a result no upper exclusion limit occurs and low shear forces affect the sample components. LÄS MER

  5. 9. On the Course of Kraft Cooking - The impact of ionic strength

    Författare :Binh Dang; Chalmers tekniska högskola; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; molecular weight distribution.; hexenuronic acids; carbohydrate removal; delignification; sodium ion concentration; lignin; ionic strength; xylan; flow-through kraft cooking; kinetics;

    Sammanfattning : Kraft pulping is the dominant process currently used to produce chemical pulps, and has been applied for more than 130 years. A large number of studies have been conducted to gain a better understanding of the delignification kinetics as well as the reactions of the wood components being dissolved during the cooking process. LÄS MER

  7. 10. Elements in regulation of the microfilament system

    Författare :Louise Hillberg; Uno Lindberg; Theresia Stradal; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cell motility; microfilament system; actin; tropomyosin; Cell and molecular biology; Cell- och molekylärbiologi; Cell Biology; cellbiologi;

    Sammanfattning : This thesis deals with cell motility. The process of rapid actin polymerization in the lamellipodium of a migrating cell is responsible for its protrusion. Studies have been made on some of the elements behind this event and special interest has been focused on the protein tropomyosin. LÄS MER