Sökning: "Oligomers"

Visar resultat 16 - 20 av 176 avhandlingar innehållade ordet Oligomers.

  1. 16. Carbon Nanostructures – from Molecules to Functionalised Materials : Fullerene-Ferrocene Oligomers, Graphene Modification and Deposition

    Författare :Michael Nordlund; Helena Grennberg; Mogens Brøndsted Nielsen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fullerenes; Graphene; Deposition; Functionalization; Organometallic complexes; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Sammanfattning : The work described in this thesis concerns development, synthesis and characterisation of new molecular compounds and materials based on the carbon allotropes fullerene (C60) and graphene.A stepwise strategy to a symmetric ferrocene-linked dumbbell of fulleropyrrolidines was developed. LÄS MER

  3. 17. The Design and Structure Prediction of Protein Oligomers

    Författare :Robert Lizatovic; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; virus capsids; coiled coils; molecular replacement; symmetry; Rosetta; protein design; structure prediction;

    Sammanfattning : The minimum free energy state of a protein (the native state) is encoded by its amino-acid sequence. Due to the many torsional degrees of freedom (DOF) available to a polypeptide chain, a vast number of conformations is possible. LÄS MER

  4. 18. Synthesis of new building blocks for conjugated oligomers

    Författare :Fredrik Allared; KTH; []
    Nyckelord :organic semiconductors; thiophenes; heterocyclic synthesis; dithienothiophene; naphthalene;

    Sammanfattning : This thesis deals with the synthesis of new organicmaterials for electronic applications. Several new ring-formingmethods are employed to construct sulphur heterocycles: Tandemelectrophilic aromatic substitution and acid-catalyzedtransetherification of methoxythiophene, double electrophilicaromatic substitutions with ethane-1, 2-disulphenyl chloride,and also, the reaction of dienes with sulphur dichloride. LÄS MER

  5. 19. Nonlinear Optical Properties of Fullerenes, Oligomers, and Solutions

    Författare :Patrick Norman; Hans Ågren; David M. Bishop; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This work presents development and applications of modern tools in ab initio quantum chemistry for obtaining linear and nonlinear response properties of molecules in the gas phase and in solution. The external perturbing fields are primarily electric in nature with frequencies in the optical region. LÄS MER

  7. 20. Pathogenic Mechanisms of the Arctic Alzheimer Mutation

    Författare :Charlotte Sahlin; Lars Lannfelt; Lars Nilsson; Christian Haass; Uppsala universitet; []
    Nyckelord :Neurosciences; Alzheimer s disease; Arctic mutation; Amyloid precursor protein; Amyloid-β; APP processing; Aβ oligomers; Docosahexaenoic acid; Neurovetenskap;

    Sammanfattning : Alzheimer’s disease (AD) is a progressive neurodegenerative disorder, neuropathologically characterized by neurofibrillay tangles and deposition of amyloid-β (Aβ) peptides. Several mutations in the gene for amyloid precursor protein (APP) cause familial AD and affect APP processing leading to increased levels of Aβ42. LÄS MER