Essays about: "stable isotopes"

Showing result 21 - 25 of 42 essays containing the words stable isotopes.

  1. 21. Trace element analysis based on neutron activation with coincident gamma ray detection

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Author : Jessica Delgado; [2017]
    Keywords : scintillator detectors; gamma ray; gamma radiation; spectrometer; neutron activation analysis; trace element; Physics and Astronomy;

    Abstract : In this work, six soil samples have been analyzed. The samples come from different sedimentary layers on Earth. They were previously studied with the objective to find the trace concentration of iridium, to correlate the increased concentrations of iridium with meteorite impacts that have occurred on Earth. READ MORE

  3. 22. Genetics of bird migration : Study on East Siberian willow warblers (Phylloscopus trochilus)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Kristaps Sokolovskis; [2017]
    Keywords : birds; willow warblers; phylloscopus trochilus; leaf warblers; migration; genetics; stable isotopes; eastern siberia;

    Abstract : Seasonal long-distance bird migration between wintering and breeding grounds is oneof the most remarkable phenomena in the history of life on earth. Migration strategies androutes vary greatly. Some birds migrate in social groups whilst others migrate alone at night,some cross few hundreds of km whilst others cover thousands of km. READ MORE

  4. 23. Neolithic farmers in Poland - A study of stable isotopes in human bones and teeth from Kichary Nowe in the south of Poland

    University essay from Stockholms universitet/Arkeologiska forskningslaboratoriet

    Author : Staffan Lundmark; [2016]
    Keywords : stable isotopic study; archaeological science; Neolithic in southern Poland; Kichary Nowe 2 grave-field; diet study on Neolithic bone material; stabila isotoper studie; laborativ arkeologi; neolitikum i södra Polen; Kichary Nowe 2 gravfält; dietstudie på neolitiskt benmaterial;

    Abstract : The diet of the Stone Age cultures is a strong indicator to the social group, thus farmers and hunters can be distinguished through their diet. There is well-preserved and well excavated Polish skeletal material available for such a study but the material has not previously been subject to stable isotopes analyses and therefore the questions of diets has not been answered. READ MORE

  5. 24. Tracing the source of colourless carbon in an arctic lake on SW Greenland : Insights of organic matter origin from hydrogen isotope analyses of samples prepared using steam equilibration

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Bror Holmgren; [2016]
    Keywords : Søndre Strømfjord; dissolved organic carbon; stable isotopes; steam equilibration;

    Abstract : Lakes play an important role in the global carbon (C) cycle as they process carbon from terrestrial (allochthonous) and within lake (autochthonous) sources and may store C over long periods of time. Some arctic lakes contain high concentrations of dissolved organic carbon (DOC) that does not absorb light and thus remains colourless. READ MORE

  6. 25. The paleoceanography of Kattegat during the last deglaciation from benthic foraminiferal stable isotopes

    University essay from Lunds universitet/Geologiska institutionen

    Author : Yasmin Bokhari Friberg; [2015]
    Keywords : δ13C; δ18O; Kattegat; Baltic Sea; stable isotopes; foraminifera; deglaciation; paleoceanography; Earth and Environmental Sciences;

    Abstract : En borrkärna från Anholt (Kattegatt) togs upp under IODP-expedition 347 i Östersjön. Kärnan är daterad till ~18-14 ka BP och representerar deglaciationen i slutet av Weichselistiden. READ MORE