Sökning: "sulphur isotope"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden sulphur isotope.

  1. 1. Formation of Sulphides in the Canadian High Arctic Large Igneous Province; Testing the Influence of Sedimentary Rocks

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Erika Hagerfors; [2018]
    Nyckelord :LIPs; HALIP; SIMS; sulphur isotopes; Ni-Cu-PGE ores; environmental deterioration; LIPs; HALIP; SIMS; svavelisotoper; Ni-Cu-PGE malmer; klimatförändring;

    Sammanfattning : Large Igneous Provinces (LIPs) form during short-lived pulses of extensive magmatic activity. LIPs are known for their ability to affect global climate as well as for their Ni-Cu-PGE ore potential. LÄS MER

  3. 2. Tidigkristen diet : En XRF-analys av strontium på skelettmaterial från Varnhems gårdskyrka

    Kandidat-uppsats, Stockholms universitet/Arkeologiska forskningslaboratoriet

    Författare :Fanny Bengtsson; [2018]
    Nyckelord :Archaeology; Archaeological Science; XRF; Strontium; Strontium concentration; Viking age; Medieval; Skeleton; Varnhem; Varnhems estate church; diet; prehistoric diet; Arkeologi; Laborativ Arkeologi; XRF; Strontium; Strontiumkoncentration; Vikingatid; Medeltid; Skelett; Varnhem; Varnhems gårdskyrka; diet; förhistorisk diet;

    Sammanfattning : The aim of this thesis is to study 31 individuals from an early christian cemetery in Varnhem, Sweden and through the use of XRF, study the strontium concentrations and the strontium to calcium ratios in bone and use that as an indicator for diet. The material consists of femurs and teeth and through analyzing this I will compare previous dietary studies using stable carbon, nitrogene and sulphur isotope analyses to see wether quantitative strontium analysis can be used as a way to study diet in prehistoric societies. LÄS MER

  4. 3. Development of a multi-collector inductively coupled plasma massspectrometry method for measurement of stable sulphur isotope ratios in aerosol sulphate

    Master-uppsats, Uppsala universitet/Analytisk kemi

    Författare :Katerina Rodiouchkina; [2018]
    Nyckelord :Sulphate aerosol; isotope ratio; sulphur isotope; δ34S and δ33S measurements; MC-ICP-MS; method development; inter-laboratory comparison;

    Sammanfattning : Sulphur stable isotope ratios are useful tracers in geological and environmental studies. They can for example be used to trace the origin of atmospheric sulphate aerosols, because anthropogenic sulphate and natural sulphate have distinguishable δ34S-values (δ34S value of approximately +0 to +8 ‰ for anthropogenic and approximately +12 to +19 ‰ for natural). LÄS MER

  5. 4. Changes in Arsenic Levels in the Precambrian Oceans in Relation to the Upcome of Free Oxygen

    Master-uppsats, Paleobiologi

    Författare :Emma Arvestål; [2013]
    Nyckelord :Arsenic; Precambrian; ocean chemistry; Great Oxygenation Event; GOE; evolution of multicellularity;

    Sammanfattning : Life on Earth could have existed already 3.8 Ga ago, and yet, more complex, multicellular life did not evolve until over three billion years later, about 700 Ma ago. LÄS MER

  7. 5. Varnhems tidiga kyrka och kyrkogård : Isotopanalys av skelettmaterialet i området

    Kandidat-uppsats, Arkeologiska forskningslaboratoriet

    Författare :Emma Roman; [2013]
    Nyckelord :laborativ arkeologi; Varnhem; Västergötland; medeltid; isotopanalys; diet; skelett;

    Sammanfattning : This paper deals with stable isotope analysis on the children of the early Christian cemetery in Varnhem, Västergötland. Human bone and tooth material from the cemetery has been analysed for stable carbon, nitrogen and sulphur isotopes. LÄS MER