Avancerad sökning

Hittade 4 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Cycles of voles, predators, and alternative prey in boreal Sweden

    Författare :Birger Hörnfeldt; S. Erlinge; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 3-4 year cycles; Clethrionomys glareolus; Clethrionomys rufocanus; Microtus agrestis; snap-trapping; rate of change; population regulation; delayed density-dependence; time-lag mechanism; seasonality; predation; food; predator avoidance; foraging behaviour; Aegolius funereus; nest boxes; numerical response; nomadism; Vulpes vulpes; Sarcoptes scabiei vulpes; Lepus timidus; Francisella tularensis; Tetraonidae; hunting statistics; zooekologi; Animal Ecology;

    Sammanfattning : Bank voles, grey-sided voles, and field voles had synchronous 3-4 year density cycles with variable amplitudes which averaged about 200-fold in each species. Cycles of vole predators (red fox and Tengmalm's owl), and their (foxes') alternative prey (mountain hare and forest grouse) lagged behind the vole cycles. LÄS MER

  3. 2. Nexus between corporate sustainability and financial performance

    Författare :ABM Fazle Rahi; Jeaneth Johansson; Marita Blomkvist; Stefan Sundgren; Högskolan i Halmstad; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; sustainability; performance; profitability; corporate responsibility; ESG; multi-theoretical approach; macroeconomic factors; microeconomic factors; women on boards; board composition; sustainable development;

    Sammanfattning : To save the planet from previous devastating corporate actions, corporations have enormous responsibilities toward the environment, economy and society. Implementing corporate sustainability practices through establishing effective governance mechanisms can be considered a transformative initiative with potential implications for social and green innovation. LÄS MER

  4. 3. Surgical trauma, inflammation and tissue injury

    Författare :Leif Törkvist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Activated partial thromboplastin time; blood flow; blood pressure; CD18; calcitonin gene-related peptide; dalteparin; glucocorticoids; heparin; intravital microscopy; leukotrienes; myeloperoxidase; neutrophils; stress; surgical flaps; rat;

    Sammanfattning : Surgical tissue trauma is a strong stimulus for local inflammation, including leukocyte recruitment. While such a response may be of importance for the defense against microorganisms, it is also clear that inflammation may contribute to further tissue injury. LÄS MER

  5. 4. Pharmacological and Developmental Aspects on Neuronal Plasticity

    Författare :Lisa Bjartmar; Jan Marcusson; Elias Eriksson; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Neuronal plasticity means the ability of the brain, its cells and networks to adapt and adjust to new challenges, a process which is ongoing throughout life. The goal of this thesis was to gain better understanding of the molecular events that follow different types of stimulations of brain structures such as the hippocampus, a key region for cognitive functions with overriding control on the corticosteroid system. LÄS MER