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Visar resultat 6 - 10 av 20 avhandlingar som matchar ovanstående sökkriterier.

  1. 6. Morphologican and functional studies on the Drosophila neuromuscular system during postembryonic stages

    Författare :Ana Beramendi; Rafael Cantera; Prof. Carlos Dotti; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Drosophila; neuromuscular system; Rel-proteins; fly brain; rhythmic morphology; aging; ; Neurobiology; Neurobiologi;

    Sammanfattning : The nervous system of the fruit fly Drosophila melanogaster has emerged as an excellent model for fundamental neuroscience as well as for biomedical research of human neurological diseases. In this thesis, two aspects of the neuromuscular system have been investigated: the role of the IkB-protein Cactus in the larval neuromuscular junction and the morphology of motor terminals throughout adult life. LÄS MER

  3. 7. Numerical modelling of ENAs from stellar wind interactions

    Författare :Andreas Ekenbäck; Mats Holmström; Michael R. Collier; Institutet för rymdfysik (IRF); []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Space physics; Space technology; Astrophysics; Space engineering; Rymdteknik;

    Sammanfattning : Energetic neutral atoms (ENAs) are produced whenever a stellar wind encounters a neutral atmosphere. If a stellar wind proton comes sufficiently close to a neutral a charge-exchange reaction may take place, transforming the proton into an ENA. LÄS MER

  4. 8. Imaging of lipids and proteins in Alzheimer's disease using Time-of-Flight Secondary Ion Mass Spectrometry

    Författare :Louise M Carlred; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; QCM-D; fluorescence microscopy; ToF-SIMS; Amyloid-β; immunohistochemistry; Sulfatides; antibodies; liposomes; Alzheimer’s disease; Cholesterol;

    Sammanfattning : Alzheimer’s disease (AD) is a neurodegenerative disease characterized by the formation of senile plaques. These plaques, which consist of aggregations of a peptide called amyloid-β, are deposited in-between the nerve cells in the brain, where they disrupt the signaling processes. LÄS MER

  5. 9. Development and Evaluation of Preparation Methods for the Analysis of Cell Membranes Using Time-of-Flight Secondary Ion Mass Spectrometry

    Författare :Jakob Malm; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; salt; cryofixation; TOF-SIMS; supported phospholipid bilayer; freeze drying; vacuum; cells; POPC; glutaraldehyde;

    Sammanfattning : The aim of this work was to evaluate and develop methods for preparing dry samples for TOF-SIMS analysis of cell membranes. For correct interpretation of the analysis data, an understanding of the effects that the preparation method has on the morphology and chemical structure of the sample must first be obtained. LÄS MER

  7. 10. Evolution of Dispersal and Habitat Exploration in Butterflies

    Författare :Ulf Norberg; Hans Van Dyck; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ethology and behavioural ecology; Etologi och beteendeekologi; etologi; Ethology;

    Sammanfattning : The development of wings may be one of the most important reasons for the great diversity among insects. Being able to move makes it possible to colonise new areas and explore resources in the surroundings. However, developing dispersal-related traits, like wings or flight muscles, is costly and moving can also be dangerous. LÄS MER