Essays about: "isotope ratio"

Showing result 16 - 19 of 19 essays containing the words isotope ratio.

  1. 16. Measuring N uptake and transport in Pinus sylvestris to estimate mycorrhizal transfer efficiency : a tracer/fertilicer experiment in northern Sweden

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Nils Henriksson; [2012]
    Keywords : Nitrogen; xylem sap; water transport; mycorrhiza; transfer efficiency; Pinus sylvestris;

    Abstract : In a large-scale field experiment, single trees in a Scots pine stand in Northern Sweden were subjected to different amounts of nitrate fertilizer containing the tracer isotope 15N. This was done on two plots, one control plot and one that had been fertilized during the previous 6 seasons, all trees were about 90 years old. READ MORE

  3. 17. Climate and Environmental Changes in Northeastern Thailand - The Record of Lake Pa Kho.

    University essay from KTH/Mark- och vattenteknik

    Author : Md Al Mamunul Haque; [2012]
    Keywords : Lake Pa Kho; Monsoon variability; Lake sediments; Geochemical variables; 14C dating; Northeastern Thailand;

    Abstract : Lake Pa Kho is a fresh water lake in Northeastern Thailand, where the East Asian summer monsoon prevails. The monsoon climate and associated variability has tremendous impacts on the life and environmental aspects of the region. READ MORE

  4. 18. Stem injection of different nitrogen forms into young Norway spruce

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Anna Petersson; [2010]
    Keywords : kväve; kväve-15; staminjektion; gran; nitrat; glutamin;

    Abstract : This master thesis has been a pilot study preceding a forthcoming project of a larger scale with the long term objective to separate the direct effect of added nitrogen on soil processes from indirect effects via trees. The aim of this study has been to investigate the allocation of nitrogen following direct injection of liquid solutions into the xylem of 40 year old Norway spruce. READ MORE

  5. 19. 90Y-Scintigraphy of small animals A study of imaging parameters

    University essay from Lunds universitet/Sjukhusfysikerutbildningen

    Author : Melinda Joo; [2003]
    Keywords : Nukleärmedicin; Medicine and Health Sciences;

    Abstract : Yttrium-90 is a pure β-emitting radionuclide with a high energy (Emax = 2.28 MeV) and a short half-life (T½ = 64.1 h). It has shown to be a promising isotope to use in radio-immunotherapy. READ MORE