Essays about: "carbon isotopes"

Showing result 16 - 20 of 25 essays containing the words carbon isotopes.

  1. 16. Peloponnesian Stalagmites and Soda Straw Stalactites as Climate Archives : Stable Isotopes in New Speleothem Material from Kapsia Cave, Peloponnese, Greece

    University essay from Stockholms universitet/Institutionen för naturgeografi

    Author : Linn Haking; [2017]
    Keywords : Stable Isotopes; Stalagmite; Soda Straw Stalactites; Climate Archive; Climate Variability; The Amount Effect; Isotopic Fractionation; Kapsia Cave; Peloponnese; Greece; Mediterranean;

    Abstract : This study presents results from stable isotope analyses of a modern stalagmite and three soda straw stalactites from Kapsia Cave, the Peloponnese, Greece. The resulting values from the stalagmite are put into context of local meteorological data, as well as previous research from Kapsia Cave. READ MORE

  3. 17. 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

  4. 18. 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

  5. 19. Studying Atomic Vibrations by Transmission Electron Microscopy

    University essay from Uppsala universitet/Materialteori

    Author : Sebastian Cardoch; [2016]
    Keywords : graphene; lammps; molecular dynamic simulations; phonon dispersion; airebo; empirical potential function; carbon isotopes; vibrations; vibrational properties; tem; transmission electron microscopy; msd; mean square displacement; phonons;

    Abstract : We employ the empirical potential function Airebo to computationally model free-standing Carbon-12 graphene in a classical setting. Our objective is to measure the mean square displacement (MSD) of atoms in the system for different average temperatures and Carbon-13 isotope concentrations. READ MORE

  6. 20. Agricultural history and its effect on Lake Ekoln, central Sweden : A study based on historical maps and the use of sediment as a proxy for lake-water phosphorus

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

    Author : Joel Avenius; [2015]
    Keywords : historical maps; sediment inferred phosphorus; eutrophication; agriculture;

    Abstract : Agriculture and the use of arable land have long been assumed to be one of the key drivers behind eutrophication of lakes. However, little is known about how early agriculture has affected lakes in the past. READ MORE