Sökning: "solid-state NMR"

Visar resultat 1 - 5 av 84 avhandlingar innehållade orden solid-state NMR.

  1. 1. Investigating cellulose structure using solid-state NMR spectroscopy

    Författare :Alexander Idström; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; CNC; crystallinity index; regenerated cellulose; 2D NMR; native cellulose; pulp; Solid-state NMR; ionic liquids; CP MAS 13C-NMR; hornification;

    Sammanfattning : Cellulose is the most abundant polymer in nature and it is an important constituent in most flowers, trees, and even some animals. Cellulose has an established use in many important products, such as textile fibers, paper and paperboard, and recently new applications have received increased attention. LÄS MER

  2. 2. Solid-State NMR Characterization of Lipid Membranes

    Författare :Vasco Castro; Arnold Maliniak; Göran Lindblom; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Solid-State NMR; Membranes; Lipids; Glycolipids; Local Anesthetics; Hydration; Physical chemistry; Fysikalisk kemi; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : This thesis deals with the study of lipid bilayer systems by solid-state nuclear magnetic resonance. Two-dimensional 1H-13C separated local field experiments under magic-angle spinning were employed to investigate structural and dynamical modifications of cell membranes, resulting from the addition of compounds with some biological relevance. LÄS MER

  3. 3. Solid state characterisation and compaction behaviour of pharmaceutical materials

    Författare :Christina Gustafsson; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmacy; Solid-state; Tablet; Thermal analysis; Cellulose; Spectroscopy; NMR; NIR; FT-IR; Crystallinity; MVDA; FARMACI; PHARMACY; FARMACI; farmaceutisk farmakologi; Pharmaceutical Pharmacology;

    Sammanfattning : In this thesis, factors important in tableting operations and for tablet properties have been studied and characterised by different spectroscopic techniques as well as by some more conventionally used particle characterisation techniques. The spectroscopic techniques solid-state NMR, FT-IR and NIR spectroscopy, proved to be valuable tools in the estimation of particle and tablet properties, offering both specificity and sensitivity in the measurements. LÄS MER

  4. 4. Light-induced yellowing studied with ¹³C-enriched CW-DHP and solid state ¹³C NMR spectroscopy

    Författare :Jim Parkås; Chalmers University of Technology; []
    Nyckelord :solid state; yellowing; picea abies; differentiation xylem; spruce; DHP; lignin; 13C NMR spectroscopy; 13C-enrichment;

    Sammanfattning : .... LÄS MER

  5. 5. Molecular Order and Dynamics in Nanostructured Materials by Solid-State NMR

    Författare :Boris Kharkov; Sergey Dvinskikh; Steven Brown; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; mesoporous materials; organic-inorganic nanocomposites; surfactants; liquid crystals; MCM-41; clays; conformational dynamics; solid-state NMR; local field spectroscopy; dipolar coupling; dipolar recoupling; spin decoupling.; Kemi; Chemistry;

    Sammanfattning : Organic-inorganic nanostructured composites are nowadays integrated in the field of material science and technology. They are used as advanced materials directly or as precursors to novel composites with potential applications in optics, mechanics, energy, catalysis and medicine. LÄS MER