Search for dissertations about: "rodents"

Showing result 1 - 5 of 236 swedish dissertations containing the word rodents.

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

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

    Abstract : 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. READ MORE

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

    Author : Mridula Nandakumar; Funktionell zoologi; []
    Keywords : 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;

    Abstract : 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). READ MORE

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

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

    Abstract : 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). READ MORE

  6. 4. New sensitive and specific methods for sex steroid measurements in rodent serum and tissues

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

    Abstract : 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. READ MORE

  7. 5. ARCON in experimental and clinical radiotherapy

    Author : Ana Maria Rojas Callejas; Björn Zackrisson; René-Olivier Mirimanoff; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Oncology; ARCON; tumours; normal tissues; radiosensitization; carbogen; nicotinamide; repair inhibition; therapeutic gain; rodents; humans; Onkologi; Oncology; Onkologi; onkologi; Oncology;

    Abstract : xHypoxia and repopulation of tumour clonogens are two important determinants of treatment outcome in radiotherapy. In general clinical evidence indicates that loco-regional control may be reduced with long overall treatment times and for tumours with low pre-treatment levels of oxygen. READ MORE