Sökning: "carbazole"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet carbazole.

  1. 1. Dynamics of Excitation Transfer and Charge Separation in Polymeric Semiconductors

    Detta är en avhandling från Arvydas Ruseckas, Chemical Physics, Chemical Center, Lund University

    Författare :Arvydas Ruseckas; Lunds universitet.; Lund University.; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Anisotropy; Photoinduced absorption; Femtosecond spectroscopy; Polythiophene; Conjugated polymers; Donor-Acceptor Complexes; Carbazole; Charge separation; Excitation transfer; Recombination; Physics; Fysik;

    Sammanfattning : Dynamics of optically excited electronic states have been studied in solid films and solutions of semiconducting polymers and model compounds. Transient absorption, monitored in the spectral range from 0.9 eV to 2.5 eV with a time resolution of about 100 fs, was the main experimental technique. LÄS MER

  2. 2. Direct and indirect mechanisms for aryl hydrocarbon receptor activation mediated by 6-formylindolo[3,2-b]carbazole

    Detta är en avhandling från Stockholm : Department of Genetics, Microbiology and Toxicology, Stockholm University

    Författare :Emma Wincent; Stockholms universitet.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURAL SCIENCES Biology Cell and molecular biology Toxicology; NATURVETENSKAP Biologi Cell- och molekylärbiologi Toxikologi; toxikologisk genetik; Genetic Toxicology;

    Sammanfattning : The aryl hydrocarbon receptor (AhR) is mostly recognized for mediating the adverse effects of dioxins. In addition, endogenous activation of the AhR seems to have important biological functions.  Several studies have demonstrated an activation of the receptor when no exogenous ligand was added. LÄS MER

  3. 3. Formation and metabolism of the tryptophan-derived 6-formylindolo[3,2-b]carbazole - a light-induced Ah-receptor ligand

    Detta är en avhandling från Stockholm : Institutionen för genetik, mikrobiologi och toxikologi

    Författare :Linda Bergander; Stockholms universitet.; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PHARMACY Toxicology; FARMACI Toxikologi;

    Sammanfattning : The aryl hydrocarbon receptor (AhR) is a ligand dependent transcription factor ubiquitously expressed in mammalian cells. It is a genetically ancient protein mostly known for binding the extremely toxic contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). LÄS MER

  4. 4. Synthesis of indoles, bisindoles and indolocarbazoles : High affinity aryl hydrocarbon receptor ligands

    Detta är en avhandling från Stockholm : Karolinska Institutet, Biosciences and Nutrition

    Författare :Niklas Wahlström; Karolinska Institutet.; Karolinska Institutet.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Indole; bisindoles; carbazole; indolocarbazole; indolo[3; 2-b]carbazole; ICZ; FICZ; alkaloid; metabolite; tropolone; caulersin; aryl hydrocarbon receptor; Ali receptor; X-ray crystallography; Lewis acid; acylation; Vilsmeier reaction.;

    Sammanfattning : This thesis deals with the synthesis and reactions of indoles, bisindoles, indolocarbazoles and their derivatives. New methods for ring formation of planar, heterocyclic quinones, with the indolo[3,2b]carbazole or indolo[2,3-b]carbazole structures are described. LÄS MER

  5. 5. Synthetic studies of marine indole alkaloids and related systems

    Detta är en avhandling från Stockholm : Karolinska Institutet, Biosciences and Nutrition

    Författare :Ann-Louise Jonsson; Karolinska Institutet.; Karolinska Institutet.; [2005]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Marine indole alkaloids; antifouling; synthesis; diketopiperazines; HWE-reaction; bis indole alkaloids; imidates; carbazole alkaloids;

    Sammanfattning : This thesis is mainly focussed oil the synthesis of marine indole alkaloids and related systems, many of which display interesting biological activities. In the first part of this thesis we could establish and confirm the stucture of barettin and 8,9dihydrobarettin, isolated from the marine sponge Geodia baretti. LÄS MER