Sökning: "protozoan"

Visar resultat 16 - 20 av 51 avhandlingar innehållade ordet protozoan.

  1. 16. Serglycin-dependent mast cell-specific proteases and their potential interactions with Giardia intestinalis

    Författare :Zhiqiang Li; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Mast cells are located in mucosal and connective tissues throughout the body where they play important roles in immune reactions towards infections. Mast cell deficiency results in failure of clearance of the non-invasive intestinal protozoan parasite Giardia intestinalis in mice, but the mast cell-driven mechanisms remain poorly understood. LÄS MER

  3. 17. Evolution and host-specific adaptations of Legionella pneumophila

    Författare :Anaísa B. Moreno; Lionel Guy; Dan I. Andersson; Fredrik Söderbom; Alexander W. Ensminger; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Evolution; Legionella pneumophila; host-adaptation; experimental evolution; Acanthamoeba castellanii; transfection; Mikrobiologi; Microbiology;

    Sammanfattning : How bacteria evolve pathogenic traits is shaped by their communities and environments. Legionella pneumophila is ubiquitous in aquatic habitats, where it persists by replicating within a broad range of protozoan hosts. Using the same mechanisms, L. LÄS MER

  4. 18. Plasmodium falciparum drug transporter genes in emerging malaria multidrug resistance

    Författare :Maria Isabel Mendes Veiga; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Malaria is caused by an intracellular protozoan parasite of the genus Plasmodium. The use of chemotherapy, the foremost tool available for the control of the disease, has been challenged in the last decades by the development and spread of drug resistance among malaria parasites. LÄS MER

  5. 19. Membrane morphology and homeostasis: An electron microscopy approach

    Författare :Dimitra Panagaki; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nuclear envelope bud; AdipoR2; membrane homeostasis;

    Sammanfattning : Biological membranes allow life as we know it to exist. Primarily assembled from lipids and proteins, their morphology and function can greatly vary between species or even within the same cell. They create physical boundaries, separating different cells from each other and forming functional compartments within the cells. LÄS MER

  7. 20. Mechanisms structuring the pelagic microbial food web : Importance of resource and predation

    Författare :Kristina Samuelsson; Agneta Andersson; Christiane Lancelot; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; pelagic microbial food web; bacteria; flagellates; ciliates; phytoplankton; mixotrophy; nutrient status; predation limitation; resource limitation; Baltic Sea; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Temporal and spatial variations of pelagic microorganisms in the northern Baltic Sea were studied, as well as factors influencing their abundance and growth rates. Three main questions were asked 1) How does increased productivity influence the structure of the microbial food web? 2) Does predation limitation vary between trophic levels? 3) What is the relative importance of resource and predation limitation at different trophic levels?A field study in the northern Baltic Sea showed that dominating protozoa, flagellates and ciliates, increased with increasing primary productivity from north to south. LÄS MER