Sökning: "Structural isomers"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden Structural isomers.

  1. 1. Development and application of high-throughput methods for analysis of persistent organic pollutants in human blood

    Författare :Samira Salihovic; Bert van Bavel; Lars Lind; Myrto Petreas; Örebro universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Human blood; POPs; Perfluoroalkylated substances; Structural isomers; Sample preparation; Column-switch; Mass spectrometry; Kemi; Chemistry;

    Sammanfattning : The general public is continuously exposed to a wide range of environmental pollutants. This thesis focuses on a group of anthropogenic chemicals referred to as persistent organic pollutants (POPs) that have been linked to various adverse health effects in humans. LÄS MER

  2. 2. Chemical Derivatization in Combination with Liquid Chromatography Tandem Mass Spectrometry for Detection and Structural Investigation of Glucuronides

    Författare :Matilda Lampinen Salomonsson; Mikael Hedeland; Ulf Bondesson; Calle Nilsson; Uppsala universitet; []
    Nyckelord :Pharmaceutical chemistry; Derivatization; mass spectrometry; glucuronide; drug metabolism; increased sensitivity; structural investigation; 2-chloro-1-methylpyridinium iodide CMPI ; 1-ethyl-3- 3-dimethylaminopropyl -carbodiimide EDC ; 2-picolylamine PA ; 1; 2-dimethylimidazole-4-sulfonyl chloride DMISC ; Farmaceutisk kemi;

    Sammanfattning : This thesis presents novel approaches for structural investigation of glucuronides using chemical derivatization in combination with liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MSn).Today, LC-ESI-MSn is the dominant technique for quantitative as well as qualitative analyses of metabolites, due to its high sensitivity and selectivity. LÄS MER

  3. 3. Structural and functional studies of biomolecules with NMR and CD spectroscopy

    Författare :Evangelos Papadopoulos; Astrid Gräslund; Göran Karlsson; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NMR; protein structure; nouse Doppel; HTH; C-repressor; potassium channel; Biophysics; Biofysik; Biophysics; biofysik;

    Sammanfattning : Experimentally derived biomolecular structures were determined by Nuclear Magnetic Resonance (NMR). The properties of selected peptides and proteins in solution and in membrane mimicking micelles were observed by circular Dichroism (CD), mass spectrometry (MS), and other spectroscopic techniques. LÄS MER

  4. 4. Making Analogues of Tröger's Base – Fused oligomers, endo/exo isomers and twisted amides

    Författare :Josep Artacho Ruiz; Centrum för analys och syntes; []

    Sammanfattning : The centenarian Tröger’s base (TB) was envisaged as scaffold for the construction of tubular-shaped cleft molecules due to its the remarkable structural properties. This endeavor started with the synthesis of the three possible diastereomers of a linear symmetrically fused tris-TB analogue, the anti-anti, the syn-syn, and the syn-anti. LÄS MER

  5. 5. Methylsulphonyl-chlorobenzenes and the olfactory system : Comparative toxicity of the 2,5- and 2,6-dichlorinated isomers in mice

    Författare :Fariba Bahrami; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; toxikologi; Toxicology;

    Sammanfattning : Methyl sulphone metabolites of chlorinated aryl hydrocarbons are persistentenvironmental pollutants that can bioaccumulate in animals and humans. Little is known about the toxicological effects of these metabolites and this thesis is an attempt to increase this limited knowledge. LÄS MER