Sökning: "NMR spectroscopy"

Visar resultat 21 - 25 av 359 avhandlingar innehållade orden NMR spectroscopy.

  1. 21. Solid state characterisation and compaction behaviour of pharmaceutical materials

    Författare :Christina Gustafsson; Uppsala universitet; []
    Nyckelord :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

  3. 22. Biophysical studies of membrane associated peptides

    Författare :Jesper Lind; Astrid Gräslund; Lena Mäler; Christian Griesinger; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NMR; spectroscopy; membrane interaction; bicelles; Chemistry; Kemi; Biophysics; biofysik;

    Sammanfattning : A large part of the processes in living organisms involves proteins acting in a biological membrane. Biophysical studies on isolated model systems can give important understandings of the complicated biological mechanisms in the membrane. In this thesis peptide membrane interaction mechanisms are studied in several different systems. LÄS MER

  4. 23. Deciphering Carbohydrate Structure : From NMR Chemical Shifts to Conformational Analysis

    Författare :Kevin M. Dorst; Göran Widmalm; Martina Delbianco; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NMR chemical shift prediction; Structural elucidation; Conformational studies; NMR spectroscopy; MD simulations; Organic Chemistry; organisk kemi;

    Sammanfattning : Carbohydrates are ubiquitous in nature and exhibit a multitude of roles. Besides nucleic and amino acids, they can be regarded as the third alphabet of life. They are used as energy source to fuel the cells, as structural building blocks and play a key role in cellular recognition processes. LÄS MER

  5. 24. ROBUST DETECTION AND SPECTRAL ANALYSIS OF SIGNALS WITH APPLICATIONS IN SPECTROSCOPY

    Författare :Naveed Butt; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Detection; NQR; NMR; Raman Spectroscopy; Spectral Analysis.;

    Sammanfattning : Modern spectroscopic techniques, such as nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR), and Raman spectroscopy, rely heavily on statistical signal processing systems for decision making and information extraction. The first part of this thesis introduces novel robust algorithms for detection, estimation, and classification of signals obtained through these spectroscopic techniques. LÄS MER

  7. 25. NMR spectroscopy and MD simulations of carbohydrates

    Författare :Elin Säwén; Göran Widmalm; Manuel Martin Pastor; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NMR specroscopy; MD simulations; carbohydrates; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Sammanfattning : Knowledge about the structure, conformation and dynamics of carbohydrates is important in our understanding of the way carbohydrates function in biological systems, for example in intermolecular signaling and recognition. This thesis is a summary of five papers studying these properties in carbohydrate-containing molecules with NMR spectroscopy and molecular dynamics simulations. LÄS MER