Sökning: "birgersson"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet birgersson.

  1. 1. Calculations of Clean and Adsorbate Covered Metal Surfaces and their Core-Level Photoemission Spectra

    Författare :Martin Birgersson; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chemical shifts; density functional theory; Condensed matter:electronic structure; electrical; magnetic and optical properties; supraconductors; magnetic resonance; relaxation; Atomic and molecular physics; spektroskopi; magnetisk resonans; supraledare; magnetiska och optiska ; egenskaper elektriska; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; core-level photoemission; single crystal surfaces; Atom- och molekylärfysik; Fysicumarkivet A:2002:Birgersson; core-hole degeneracies; metal surfaces; adsorption; molecular vibrations;

    Sammanfattning : The present thesis is concerned with the theoretical study of x-ray photoemission spectra from clean and adsorbate-covered metal surfaces. The main tool is ab initio density functional (DFT) total energy calculations. LÄS MER

  3. 2. Maternal investment in male and female offspring in the fallow deer

    Författare :Björn Birgersson; Kjell Wallin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal physiology; Zoofysiologi; zoologi; Zoology;

    Sammanfattning : In this thesis, I investigate whether mothers of the polygynous fallow deer, Dama dama, bias their investment towards male offspring. I aim to answer the specific questions: (i) how is offspring fitness related to maternal investment?; (ii) do male fawns grow faster than female fawns during the period of maternal investment, and if so, why?; (iii) are male fawns more costly to raise than female fawns?; (iv) do fallow deer mothers adjust the sex of their offspring in relation to their ability to invest resources? To answer these questions I have collected and analysed data on reproduction of an enclosed fallow deer population and also performed an experimental study in which the level of investment was controlled for. LÄS MER

  4. 3. Asymmetric synthesis via C2-symmetric aziridines

    Författare :Carin Birgersson; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  5. 4. Development of a regeneration procedure for commercial automotive three-wy catalysts

    Författare :Henrik Birgersson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; deactivation; fouling; sintering; poisoning; palladium; rhodium; regeneration; dispersion; thermal gas treatment; oxy-chlorine; TWC; automotive catalyst; Chemical process equipment; Kemisk apparatteknik;

    Sammanfattning : Car exhaust catalysts were introduced in the early 1980’s, to limit the release of pollutants such as hydrocarbons, carbon monoxides and nitrogen oxides. These catalysts contain noble metals such as palladium (Pd), platinum (Pt) and rhodium (Rh) and are able to simultaneously abate all three of the above-mentioned pollutants, hence the name three-way catalyst (TWC). LÄS MER

  7. 5. Role and mechanism of estrogen receptor beta in the ovary and colon

    Författare :Madeleine Birgersson; Cecilia Williams; Amena Archer; Claudia Kutter; Eduardo Villablanca; David Moore; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicinsk teknologi; Medical Technology;

    Sammanfattning : Estrogen regulates a variety of important physiological functions in both males and females, where the regulation of female reproduction and the development of sexual organs are typical examples. The effects of estrogen are predominantly exerted via signaling through the two nuclear receptors estrogen receptor α (ERα) and β (ERβ), or the membrane G protein-coupled estrogen receptor 1 (GPER1). LÄS MER