Sökning: "rodents"

Visar resultat 1 - 5 av 237 avhandlingar innehållade ordet rodents.

  1. 1. On cholinergic mechanisms involved in ethanol reinforcement. A behavioral and neurochemical study in rodents

    Författare :Anna Larsson; Göteborgs universitet; []
    Nyckelord :Acetylcholine; Dopamine; Ethanol; Locomotor activity; Microdialysis; Nicotine; Nicotinic acetylcholine receptors; Rodents; Reward;

    Sammanfattning : Alcohol (ethanol) and smoking (nicotine) are commonly co-abused in human beings. Drugs of abuse interact with the brain mesolimbic dopamine system, an important part of the brain reward system. These dopaminergic neurons originate in the ventral tegmental area and project to e.g. LÄS MER

  3. 2. Pathogen-mediated selection in the immune system of rodents : Exploring selection targets, functional effects and trade-offs

    Författare :Mridula Nandakumar; Funktionell zoologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; pathogen-mediated selection; bank voles; Myodes glareolus; immune system; balancing selection; immune response; rodents; positive selection; transcriptomics;

    Sammanfattning : Pathogens cause disease and play an important role in shaping evolution of the host immune system. They create pressure on host immunity to evolve in numerous ways, most commonly by increasing divergence between species (positive selection) or increasing polymorphisms within a population (balancing selection). LÄS MER

  4. 3. Effects of herbivory on arctic and alpine vegetation

    Författare :Åsa Lindgren; Ove Eriksson; Jon Moen; Anders Angerbjörn; Ingibjörg S Jónsdóttir; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; herbivory; reindeer; rodents; functional traits; plant species composition; arctic; alpine; tundra; seed limitation; Carex bigelowii; Biology; Biologi; Plant Ecology; växtekologi;

    Sammanfattning : The distribution of plant species and functional traits in alpine and arctic environments are determined by abiotic conditions, but also by biotic interactions. In this thesis, I investigate interactions among plants and herbivory effects on plant community composition and plant functional traits in three different regions: Swedish Lapland, Beringia (USA/Russia) and Finnmark (Norway). LÄS MER

  5. 4. Pestens gåta : farsoter i det tidiga 1700-talets Skåne

    Författare :Bodil Persson; Historia; []
    Nyckelord :HUMANIORA; HUMANITIES; pestilential fevers; diagnosis; symptoms; pattern of distribution; demography; causes of death; burial records; epizootics; rats; rodents; lice; fleas; regional and local analysis; scurvy; epidemic typhus fever; measles; Plague; smallpox; plague vectors; Modern history up to circa 1800 ; Tidig modern historia till ca. 1800 ; Public health; epidemiology; Folkhälsa; epidemiologi;

    Sammanfattning : This study deals with Sweden’s last outbreak of the plague with focus on Skåne, where the epidemic raged for three years - from late autumn 1710 to late autumn 1713. This was a time of war, crop failures as well as other simultaneously occurring epidemics. LÄS MER

  7. 5. New sensitive and specific methods for sex steroid measurements in rodent serum and tissues

    Författare :Maria E. Nilsson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sex steroids; mass spectrometry; rodents;

    Sammanfattning : Accurate measurement of sex steroids (androgens, estrogens, and progesterone) is essential in research and clinical settings for common diseases including osteoporosis, prostate cancer, breast cancer, and cardiovascular diseases. Sex steroids are not only produced in the gonads and adrenals but may also be locally synthesized in peripheral target tissues. LÄS MER