Search for dissertations about: "stable carbon isotope analysis"

Showing result 1 - 5 of 40 swedish dissertations containing the words stable carbon isotope analysis.

  2. 1. Stable chlorine isotope analysis of chlorinated acetic acids

    Author : Milena Edith Ivansson; Henry Holmstrand; Örjan Gustafsson; Teresia Svensson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stable chlorine isotope analysis; chlorinated acetic acids; compound-specific isotope analysis;

    Abstract : Chlorinated acetic acids (CAAs) constitute a group of polar organic compounds that are ubiquitous in the environment. Their environmental occurrence has been extensively studied but their sources are still not well constrained. READ MORE

  4. 2. Early Pottery Use among Hunter-Gatherers around the Baltic Sea

    Author : Vasiliki Papakosta; Sven Isaksson; Ole Stilborg; Åsa Maria Larsson; Stockholms universitet; []
    Keywords : HUMANIORA; HUMANITIES; Early Pottery Use; Hunter-Gatherers; Baltic; Late Mesolithic; Ceramics; Ertebølle; Narva; Early Comb Ware; Lipid Extraction; Lipid Residue Analysis; Molecular Analysis; Stable Carbon Isotope Analysis; Elemental Analysis; Mineralogical Analysis; arkeologi med inriktning mot laborativ arkeologi; Scientific Archaeology;

    Abstract : This thesis aims to provide an understanding of the dynamics underlying the adoption of pottery by pre-agrarian hunter-gatherer cultural groups around the Baltic Sea. The focus is on three approximately contemporaneous early pottery traditions of the region (ca. READ MORE

  5. 3. Intramolecular isotope analysis reveals plant ecophysiological signals covering multiple timescales

    Author : Thomas Wieloch; Jürgen Schleucher; Mats Nilsson; Gerd Gleixner; Lisa Wingate; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NMR spectroscopy; tree ring; isotope ratio; isotope effect; intramolecular 13C 12C signal; carbon allocation; acclimation; plant performance; climate reconstruction; plant ecophysiology;

    Abstract : Our societies' wellbeing relies on stable and healthy environments. However, our current lifestyles, growth-oriented economic policies and the population explosion are leading to potentially catastrophic degradation of ecosystems and progressive disruption of food chains. READ MORE

  6. 4. Towards understanding stable isotope signatures in stressed systems

    Author : Caroline Ek; Elena Gorokhova; Katrine Borgå; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stable isotope analysis; trophic position; chemical exposure; oxidative stress; Daphnia magna; Gammarus spp.; Limecola balthica; Applied Environmental Science; tillämpad miljövetenskap;

    Abstract : Stable isotope analysis (SIA) is a valuable tool in ecotoxicology because δ13C and δ15N may provide insights into the trophic transfer of contaminants in a food web. The relationship between a species’ trophic position (TP, determined from δ15N) and internal concentration of biomagnifying contaminants can be established and used for regulatory purposes. READ MORE

  7. 5. The functional potential of methane producing and consuming microorganisms in a changing world : Den funktionella potentialen hos mikroorganismer som producerar och förbrukar metan i en föränderlig värld

    Author : Joel White; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Methane; Metagenomics; Peatlands; flux; carbon dioxide; chamber measurements; stable isotope analysis; Eriophorum vaginatum; Calluna vulgaris; climate change; Captured metagenomics;

    Abstract : It’s clear that human activities have heated our climate via the release of anthropogenic greenhouse gases. Recent changes within the earth climate are rapid, intensifying, and unprecedented. READ MORE