Sökning: "caffeine"

Visar resultat 6 - 10 av 54 avhandlingar innehållade ordet caffeine.

  1. 6. Coffee Consumption in Relation to Osteoporosis and Fractures : Observational Studies in Men and Women

    Författare :Helena Hallström; Karl Michaëlsson; Alicja Wolk; Anders Glynn; Olle Svensson; Uppsala universitet; []
    Nyckelord :Coffee; Tea; Caffeine; Bone mineral density; Osteoporosis; Fractures; Cohort studies;

    Sammanfattning : During the past decades, the incidence of osteoporotic fractures has increased dramatically in the Western world. Consumption of coffee and intake of caffeine have in some studies been found to be associated with increased risk of osteoporotic fractures, but overall results from previous research are inconsistent. LÄS MER

  3. 7. Exploring the Molecular Behavior of Carbohydrates by NMR Spectroscopy : Shapes, motions and interactions

    Författare :Olof Engström; Göran Widmalm; Anthony S. Serianni; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NMR spectroscopy; NMR relaxation; DNMR; CORCEMA-ST; carbohydrates; caffeine; O-antigen; glycofullerenes; organisk kemi; Organic Chemistry;

    Sammanfattning : Carbohydrates are essential biomolecules that decorate cell membranes and proteins in organisms. They are important both as structural elements and as identification markers. Many biological and pathogenic processes rely on the identification of carbohydrates by proteins, thereby making them attractive as molecular blueprints for drugs. LÄS MER

  4. 8. Taurine and dopamine-related effects of ethanol. An experimental study in rodents

    Författare :Lisa Ulenius; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Addiction; Alcohol; Caffeine; Nucleus accumbens; Microdialysis;

    Sammanfattning : The reinforcing properties of alcohol (ethanol) are associated with activation of the mesolimbic dopamine system and the concomitant increase in dopamine in the nucleus accumbens (nAc). Changes in this system are thought to be a predominant underlying factor in promoting excessive alcohol intake and alcohol use disorder. LÄS MER

  5. 9. On the Thermodynamic Solvation of Biomolecules in Solution

    Författare :Stefan Hervö Hansen; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Solubility; Solvation; Aggregation; Statistical thermodynamics; Molecular dynamics; Monte Carlo simulations; Free energy calculations; Energy-representation theory of solvation; Proteins; Salt bridges; Caffeine;

    Sammanfattning : The topic solvation thermodynamics is an important aspect of chemistry, dealing with the effects introduced by solvents onto solutes. In particular, biological systems are highly heterogeneous in their choice of solvent typically characterized by either being in a polar or non-polar environment. LÄS MER

  7. 10. Elimination of caffeine metabolites in man

    Författare :Nikolaos Rodopoulos; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :C8-oxidation capillary elearophoresis dimethylxanthines high-performance liquidchromatography liver cirrhosis N-acetylation N-demethylation monomethylurates monomethylxanthines;

    Sammanfattning : Plasma, saliva and urinary caffeine (CA), paraxanthine (PX), theobromine (TB), theophylline (TP) and their metabolites were, after separation into fractions by reversed-phase high-performance liquid chromatography (HPLC), quantitated by capillary electrophoresis (CE). In healthy adults, 96% of the total amount of excreted compounds derived from CA were dimethylxanthines (DMXs) and metabolites, the remainder 4% being nonmetabolized CA and its non-demethylated urate. LÄS MER