Search for dissertations about: "stable-isotope tracers"
Showing result 1 - 5 of 6 swedish dissertations containing the words stable-isotope tracers.
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1. Mercury species transformations in marine and biological systems studied by isotope dilution mass spectrometry and stable isotope tracers
Abstract : This thesis focuses on the implementation of species-specific isotope dilution (SSID) methodology and stable isotope tracers to determine mercury species occurrence and transformation processes in-situ and during sample treatment. Isotope enriched tracers of methyl-, ethyl- and inorganic mercury were synthesised and applied in different combinations to marine and biological samples. READ MORE
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2. Species interactions and energy transfer in aquatic food webs
Abstract : Food webs are structured by intricate nodes of species interactions which govern the flow of organic matter in natural systems. Despite being long recognized as a key component in ecology, estimation of food web functioning is still challenging due to the difficulty in accurately measuring species interactions within a food web. READ MORE
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3. Liquid Chromatography – Mass Spectrometry Analysis of Short-lived Tracers in Biological Matrices : Exploration of Radiotracer Chemistry as an Analytical Tool
Abstract : Liquid chromatography – mass spectrometry (LC-MS) methods were developed for the analysis of positron emission tomography (PET) radiotracers in biological matrices. Additionally, radiotracer chemistry was explored as an analytical tool for supporting LC-MS method development and imaging molecular interactions in miniaturised chemical analysis systems. READ MORE
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4. Anabolic response to amino acid supplementation in critical illness
Abstract : Background: Critically ill patients suffer from protein catabolism with losses of skeletal muscle and whole-body proteins associated with morbidity and mortality. Catabolism is difficult to overcome, but nutritional supplementation with enteral protein or parenteral amino acids may limit protein losses. READ MORE
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5. Development and Evaluation of Methods in Source Apportionment of the Carbonaceous Aerosol
Abstract : Carbonaceous aerosols are known to affect human health negatively and to affect the climate of Earth. As specific types of aerosols originate from specific sources, it is important to know the amount of aerosols emitted from each source. Aerosol source apportionment is an important tool in mitigating air pollution and improving air quality. READ MORE