Sökning: "gas-liquid chromatography"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden gas-liquid chromatography.

  1. 1. Phytosterols. Effect of intake on cholesterol absorption and colorectal cancer risk

    Författare :Lena Normén; Göteborgs universitet; []
    Nyckelord :phytosterols; phytostanols; soy sterols; sitostanol; ester; gas-liquid chromatography; GLC; cholesterol absorption; sterol excretion; fruit; vegetables; cereals; colon cancer; rectal cancer; dietary fiber;

    Sammanfattning : Phytosterols are lipid components of all food items of plant origin. They are effective in decreasing plasma cholesterol concentrations, but have also been suggested to protect against colorectal cancer. LÄS MER

  3. 2. Structural studies and modification of some carbohydrate-containing bacterial antigens, and mass spectrometric studies of oligosaccharides as their permethylated alditols

    Författare :Frank Lindh; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The structures of the bacterial antigens of two capsular polysaccharides from the species Klebsiella and a lipopolysaccharide from Escherichia coli have been elucidated. The principle methods used in the investigation were methylation analysis, partial acid hydrolysis. LÄS MER

  4. 3. Human salivary esterases : a biochemical study of carboxylesterase and thio-esterase in human saliva with special reference to their inhibition by dental materials

    Författare :Lennart Lindqvist; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Electrophoretic and gel chromatographic techniques have been developed in order to obtain partially purified esterases from small amounts of human saliva. These techniques permit the characterization of salivary esterase regarding substrate and inhibitor specificities, and lectin binding ability. LÄS MER

  5. 4. Structural studies of bacterial carbohydrate antigens with focus on oral commensal bacteria

    Författare :Niklas Bergström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Streptococcus mitis; Streptococcus pneumoniae; Vibrio cholerae; polysaccharide; structure; Nuclear magnetic resonance spectroscopy NMR ; Mass spectrometry MS .;

    Sammanfattning : 90% of the total number of cells in the human body consist of the normal bacterial flora. These bacteria are mostly not harmful and, indeed, even beneficial as long as they remain physiologically outside the body, e.g., within the gastro-intestinal tract. LÄS MER

  7. 5. Separation of Water and Fat Signal in Magnetic Resonance Imaging : Advances in Methods Based on Chemical Shift

    Författare :Johan Berglund; Joel Kullberg; Lars Johansson; Håkan Ahlström; Zhi-Pei Liang; Uppsala universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Magnetic resonance imaging; digital image reconstruction; chemical shift imaging; water and fat separation; Dixon method; fat suppression; quantitative MRI; whole-body MRI; fatty acid composition; fat unsaturation; triglycerides; adipose tissue; liver fat; T2* mapping; Radiology; Radiologi; Radiology; Radiologi;

    Sammanfattning : Magnetic resonance imaging (MRI) is one of the most important diagnostic tools of modern healthcare. The signal in medical MRI predominantly originates from water and fat molecules. LÄS MER