Sökning: "Stable isotope analysis"

Visar resultat 16 - 20 av 79 avhandlingar innehållade orden Stable isotope analysis.

1. 16. Multiplexed absolute quantification of blood plasma proteins using targeted proteomics

   Författare :David Kotol; Mathias Uhlén; Edfors Fredrik; Roman Zubarev; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mass spectrometry; targeted proteomics; stable isotope standards; recombinant protein standards; absolute quantification; blood plasma; multiplex analysis; plasma profiling; Biotechnology; Bioteknologi;

   Sammanfattning : Proteins are the molecular building blocks of all living organisms. They are the functioning actors in metabolism and communication, and they give specific architecture and purpose to all tissues. Their abundance is dynamic and can be interpreted and associated to different physiological states or diseases. LÄS MER

3. 17. Identification of brominated organic compounds in aquatic biota and exploration of bromine isotope analysis for source apportionment

   Författare :Maria Unger; Örjan Gustafsson; Lillemor Asplund; Per Andersson; Sheryl Tittlemier; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polybrominated dibenzo-p-dioxins PBDDs ; NMR spectroscopy; preparative capillary gas chromatography PCGC ; stable bromine isotope ratio; GC-multiple collector- ICP-MS; Environmental chemistry; Miljökemi; miljökemi; Environmental Chemistry;

   Sammanfattning : Brominated organic compounds (BOCs) of both natural and anthropogenic origin are abundant in the environment. Most compounds are either clearly natural or clearly anthropogenic but some are of either mixed or uncertain origin. LÄS MER

4. 18. Forests, Functions, and Food Webs : Riparian processes through an ecological and molecular lens

   Författare :Jeffery Marker; Eva Bergman; Rolf Lutz Eckstein; Denis Lafage; Rachel E. Bowes; Ann Erlandsson; John S. Richardson; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Riparian systems; functional diversity; stable isotope analysis; metabarcoding; Tetragnathidae; Lycosidae; forestry management; prey subsidies; Biology; Biologi;

   Sammanfattning : Riparian systems are critical ecological interfaces that have a significant impact on the surrounding aquatic and terrestrial ecosystems. The riparian and surrounding systems have significant roles in regulating energy flow, providing essential nutrients, and supporting unique species, making them important for ecosystem function. LÄS MER

5. 19. Exploring the limitations of 14C bomb-pulse dating on human tissue samples

   Författare :Elisavet Georgiadou; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bomb-pulse dating; human tissues; stable isotope analysis;

   Sammanfattning : The aim of this work, which will be part of the PhD work of the author of this report, was to evaluate the precision and accuracy expected from bomb-pulse dating of human tissue, focusing on the uncertainties introduced by variation in 14C in the human diet. Such variations may be caused by releases from nuclear installations, hospitals and laboratories using 14C, use of fossil fuels as well as variations in the type of diet consumed (e. LÄS MER

7. 20. 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

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

   Sammanfattning : 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. LÄS MER