Search for dissertations about: "Sean May"

Showing result 1 - 5 of 6 swedish dissertations containing the words Sean May.

  1. 1. Development of cannabinoid subtype-1 (CB1) receptor ligands for PET

    Author : Sean R Donohue; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Introduction: Abnormalities in brain cannabinoid subtype-1 (CB1) receptor concentrations and/or signaling pathways may be involved in a variety of psychiatric and neurodegenerative disorders. There is a strong need to image and quantify brain CB1 receptor concentrations in living humans under baseline and diseased conditions. READ MORE

  2. 2. Untangling ambiguities in the microbial fossil record : experimental abiotic and biological approaches

    Author : Sigrid Huld; Anna Neubeck; Sebastian Willman; Sean McMahon; Barbara Cavalazzi; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; chemical gardens; pseudofossils; experimental mineralisation; microbial fossils; methanogens;

    Abstract : Life on early earth has long been the topic of discussion for many researchers: how did it come to be? Which cells came first? Where can we find them? The most ancient rocks on our planet may hold some of the answers to these questions, but many may only be answered in laboratories. Chemical and morphological traces can be found from Archaean deposits, tantalisingly similar to modern day prokaryotes. READ MORE

  3. 3. The influence of climate and permafrost on catchment hydrology

    Author : Emma Johansson; Georgia Destouni; Sean Carey; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Hydrology; Periglacial; Greenland; Forsmark; Talik; Permafrost Hydrology; Hydrology; hydrologi;

    Abstract : The cycling of water in the landscape is influenced by climate change on different time scales and in different directions regarding warming or cooling trends. Along with a changing climate, also the landscape and subsurface conditions, such as permafrost extent, may change in a long-term perspective. READ MORE

  4. 4. Phylogenetic Support and Chloroplast Genome Evolution in Sileneae (Caryophyllaceae)

    Author : Per Erixon; Bengt Oxelman; Sean Graham; Uppsala universitet; []
    Keywords : Biology; Phylogenetics; Bayesian inference; Bootstrapping; cpDNA; Sileneae; Interspecific chloroplast recombination; Hybridization; clpP; Positive selection; Extreme substitution rates; Biologi;

    Abstract : Evolutionary biology is dependent on accurate phylogenies. In this thesis two branch support methods, Bayesian posterior probablities and bootstrap frequencies, were evaluated with simulated data and empirical data from the chloroplast genome. READ MORE

  5. 5. Regulation of the bacterial cell cycle in response to starvation

    Author : David J. Leslie; Kristina Jonas; Sean Crosson; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; molekylär biovetenskap; Molecular Bioscience;

    Abstract : Bacteria have adapted to diverse environments, which are often unpredictable and constantly changing. In order to survive, bacteria need to make the most of nutrients while they are available, while being prepared to rapidly change their behaviour when conditions take a turn for the worse. READ MORE