Sökning: "dissolved organic carbon"

Visar resultat 26 - 30 av 179 avhandlingar innehållade orden dissolved organic carbon.

  1. 26. Carbon Dioxide Supersaturation in Lakes – Causes, Consequences and Sensitivity to Climate Change

    Författare :Sebastian Sobek; Lars J. Tranvik; Yves Prairie; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; carbon dioxide; boreal lakes; respiration; dissolved organic carbon; climate change; Biologi; Biology; Biologi;

    Sammanfattning : The global carbon cycle is intimately linked with the earth’s climate system. Knowledge about carbon cycling in the biosphere is therefore crucial for predictions of climate change. LÄS MER

  3. 27. The dissolved organic carbon released from lake phytoplankton : biochemical composition and bacterial utilization

    Författare :Ingvar Sundh; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  4. 28. NMR studies of Carbohydrate Structure and Dynamics in Solution

    Författare :Torgny Rundlöf; Thomas Peters; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic Chemistry; organisk kemi;

    Sammanfattning : Methods for studies of the structures of carbohydrates in solution and their dynamics are presented. Approaches employing nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS), force-field computer simulations and chemical methods are described. LÄS MER

  5. 29. Transport, degradation and burial of organic matter released from permafrost to the East Siberian Arctic Shelf

    Författare :Lisa-Marie Bröder; Örjan Gustafsson; Tommaso Tesi; Elizabeth Canuel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organic carbon; marine sediments; East Siberian Sea; Laptev Sea; cross-shelf transport; degradation rate constants; carbon isotopes; terrestrial biomarkers; HMW wax lipids; lignin phenols; compound-specific radiocarbon analysis; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Permafrost soils in the Arctic store large quantities of organic matter, roughly twice the amount of carbon that was present in the atmosphere before the industrial revolution. This freeze-locked carbon pool is susceptible to thawing caused by amplified global warming at high latitudes. LÄS MER

  7. 30. Low Molecular Weight Organic Acids and Their Aluminium Complexes in Forest Soils

    Författare :Patrick van Hees; F. C. Ugolini; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The significance of low molecular weight (LMW) organic acids and their aluminium (Al) complexes in soil solutions of podzolized soils was examined. Methods for the analysis of these compounds and complexes were developed, and the impact of these substances on the weathering and podzolization processes was studied. LÄS MER