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Now showing items 11-20 of 42
Phylogeny and biogeography of the plant family Calceolariaceae
(2010-11-26)
Calceolaria L., Jovellana Ruiz & Pav., and Porodittia G. Don (=Stemotria Wettst. &
Harms) toghether constitute the family Calceolariaceae consisting of approximately
300 species distributed manily in South America. The ...
Effects of pharmaceuticals on natural microbial communities: Tolerance development, mixture toxicity and synergistic interactions
(2010-09-17)
Due to our extensive use of pharmaceuticals, low concentrations (picomol-nanomol/L) end up in the aquatic
environment. Antibiotics comprise a group of pharmaceuticals specifically designed to disrupt microbial ...
Isothiocynates as skin sensitizers. Bioactivation and distribution in skin and lymph nodes
(2010-11-05)
Development of contact dermatitis can be caused by electrophilic compounds (haptens) or prohaptens that come into contact with the skin. A prohapten is a compound seemingly harmless at first sight that can be transformed ...
Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)
(2010-02-19)
Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic ...
Ecological disturbances: the good, the bad and the ugly
(2010-11-02)
Abstract. This thesis focuses on the definitions, characterizations and quantifications of
ecological disturbances, as well as hypotheses on their impacts on biological communities.
The most prominent model on effects ...
Development and use of optical sensors in modern analytical chemistry
(2010-04-09)
A successful long-term high resolution imaging experiment in marine sediments was performed (17 days within the sample; Paper I). The time correlated calibration procedure was evolved to include parametric sigmoidal and ...
Biodiversity and genetic patterns in marine invertebrates
(2010-09-17)
Abstract:
Systematics based on genetic data has both confirmed and contradicted earlier, morphologically defined species and their relatedness. Morphology does not always correspond to genetic lineages, and this will ...
Systematics of Grania (Clitellata: Enchytraeidae), an interstitial annelid taxon
(2010-02-12)
In between the grains of sand on the ocean floor, there exists a world which few people are aware of. Representatives of almost all animal phyla can be found here. The clitellate family Enchytraeidae is in the marine ...
Land use effects on nitrous oxide emission from drained organic soils
(2010-05-21)
Since industrialisation, the atmospheric concentration of greenhouse gases (GHG) has increased significantly. The most important anthropogenic GHGs are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). N2O is ...
Samarium(II)-mediated reactions in organic synthesis - method development and mechanistic investigation
(2010-04-07)
This thesis describes the development of methods using divalent samarium reagents in organic synthesis. The main focus is placed on functional group reductions, but reductive formation of carbon-carbon bonds has also been ...