Sökning: "sulfur"

Visar resultat 11 - 15 av 292 avhandlingar innehållade ordet sulfur.

  1. 11. Industrial Application of Sulfur Concrete An Environment-friendly Construction Material

    Författare :Amon Raphael Makenya; KTH; []
    Nyckelord :Sulfur binder; Chempruf modifyer; Sulfur Concrete SC ; Durability; SC market survey; SC Applications; Environment.;

    Sammanfattning : Sulfur Concrete (SC) is a thermoplastic constructionmaterial, of mineral aggregates and modified sulfur as binder.Elemental sulfur has now a low smelting point (120oC) and appears in two solid allotropic forms,separated by considerable contraction. Hence, the need formodification to delay the transition. LÄS MER

  3. 12. Sulfur in polar ice and snow : Interpretations of past atmosphere and climate through glacial archives

    Författare :Ulf Jonsell; Margareta Hansson; Mark Curran; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ice cores; aerosols; sulfate; methanesulfonate; sulfur isotopes; climate; glacial cycles; Antarctica; Greenland; Physical geography; Naturgeografi;

    Sammanfattning : Snow contains information on the atmosphere it is deposited from. This information is stored in polar ice sheets (Antarctica and Greenland), which are unique geochronological archives of past climate and atmospheric composition. On time scales from annual to glacial cycles, this thesis deals with the signals of sulfur compounds in these archives. LÄS MER

  4. 13. Sulfur in the troposphere : a global three-dimensional model study

    Författare :Joakim Langner; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  5. 14. The Arctic sulfur aerosol : influences of transport and boundary layer processes

    Författare :Douglas Nilsson; Michael Tjernström; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Meteorologi; meteorologi; Meteorology;

    Sammanfattning : .... LÄS MER

  7. 15. Structure and bonding of sulfur-containing molecules and complexes

    Författare :Emiliana Damian Risberg; Magnus Sandström; Ingmar Persson; Tsun-Kong Sham; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sulfur species; x-ray absorption and vibrational spectroscopy; TP-DFT calculations; Chemistry; Kemi; strukturkemi; Structural Chemistry;

    Sammanfattning : Synchrotron-based spectroscopic techniques enable investigations of the many important biological and environmental functions of the ubiquitous element sulfur. In this thesis the methods for interpreting sulfur K-edge X-ray absorption near edge structure (XANES) spectra are developed and applied for analyses of functional sulfur groups. LÄS MER