Search for dissertations about: "15N stable isotopes"

Found 5 swedish dissertations containing the words 15N stable isotopes.

  1. 1. The Threat to the Baltic Salmon - a Combination of Persistent Pollutants, Parasite and Oxidative Stress

    University dissertation from Chemical Ecology and Ecotoxicology, Department of Biology, Lund University

    Author : Maria Persson; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Salmo salar; Atlantic salmon; polychlorinated biphenyls; Animal ecology; akvatisk ekologi; limnologi; Marinbiologi; limnology; aquatic ecology; marine biology; Hydrobiology; Ekologi; Ecology; lake Vänern; lake Vättern; Baltic Sea; Eubothrium crassum; aryl hydrocarbon receptor; AHR; consumption advice; stable isotopes; astaxanthin; EROD; M74; antioxidants; biomagnification; cestodes; parasites; DDT; Djurekologi; Environmental chemistry; Miljökemi; PCB;

    Abstract : Atlantic salmon (Salmo salar) from the Baltic Sea suffer from a reproduction disease known as the M74-syndrome. Newly hatched fry develop nerve disorders and die between 3-5 days after the first symptoms are seen. This is a maternally transmitted disease that is casued by a thiamine (vitamin B1) deficiency. READ MORE

  2. 2. Herbivores influence nutrient cycling and plant nutrient uptake insights from tundra ecosystems

    University dissertation from Umeå : Umeå University

    Author : Hélène Barthelemy; Olofsson Johan; Ellen Dorrepaal; Ann Milbau; Gough Laura; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Reindeer grazing; large herbivores; nutrient cycling; plant nutrient uptake; soil nutrient availability; arctic plant ecology; soil microbial communities; 15N stable isotopes; plant-soil interactions; plant quality; dung and urine.; Environmental Science; miljövetenskap; biology; biologi;

    Abstract : Reindeer appear to have strong positive effects on plant productivity and nutrient cycling in strongly nutrient-limited ecosystems. While the direct effects of grazing on vegetation composition have been intensively studied, much less is known about the indirect effect of grazing on plant-soil interactions. READ MORE

  3. 3. Population Dynamics, Diet and Migrations of the Únetice Culture in Poland

    University dissertation from Umeå : Umeå University

    Author : Dalia Anna Pokutta; Göteborgs universitet.; Gothenburg University.; [2013]
    Keywords : HUMANIORA; HUMANITIES; palaeodemography; Bronze Age; Central Europe; Únětice culture; stable isotopes analyses; 13C and 15N analyses; 87Sr 86 strontium analyses; radiocarbon dating; palaeopathology; mobility; diet; prehistoric identity; child in prehistory; eldery in prehistory; Únětice tribal elites; prehistoric homicide; fertility; mortality; population growth; Bronze Age transportation; theory of migrations; Silesia; Wrocław; Nebra;

    Abstract : Únětice kulturens roll när det kommer till formandet av bronsåldern i Europa kan inte överskattas. Uppkomsten och existensen av denna originella, utvidgande och dynamiska population markerar en av de mest intressanta tidpunkterna i europeisk förhistoria, tidpunkten då en era avslutas och en ny tar vid. READ MORE

  4. 4. The Nitrogen Cycle in Soil - Climate Impact and Methodological Challenges in Natural Ecosystems

    University dissertation from Umeå : Umeå University

    Author : Anna-Karin Björsne; Göteborgs universitet.; Gothenburg University.; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Nitrogen cycle; 15N tracing experiments; gross N transformation rates; climate change; climate treatments; mineralization; nitrification; forest fertilization; nitrous oxide emissions; boreal forest soil; tree species; soil organic matter; C:N ratio;

    Abstract : Nitrogen (N) is a fundamental element for life, and limiting in many terrestrial ecosystems. In non-N-fertilized ecosystems, the N inputs can be low, and the nutrient availability for plants is determined by the internal cycling of N. READ MORE

  5. 5. Protein structures and protein-solvent interactions : Development and application of methods in high-resloultion nuclear magnetic resonance spectroscopy

    University dissertation from Stockholm : Karolinska Institutet, false

    Author : Hannes Ponstingl; Karolinska Institutet.; Karolinska Institutet.; [1998]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : Nuclear magnetic resonance (NMR) spectroscopy in solution was used for the structural characterization of the proteins glutaredoxin-3 and flavodoxin from E. coli. A new NMR technique for the measurement of three-bond a proton-amide proton scalar coupling constants was developed. READ MORE