Sökning: "Thomas Z"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Thomas Z.

  1. 1. Genetics and the Origin of Two Flycatcher Species

    Författare :Thomas Borge; Glenn-Peter Saetre; Staffan Bensch; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; reinforcement; reproductive isolation; Z chromosome; hybridization; mate-choice; single nucleotide polymorphism; sequence variation; sexual selection; recombination; Biologi; Biology; Biologi;

    Sammanfattning : In this thesis, different genetic tools are used to investigate pre- and postzygotic barriers to gene exchange and their role in speciation in the pied flycatcher (Ficedula hypoleuca) and the collared flycatcher (F. albicollis). This species complex consists of four genetically distinct clades that apparently diverged in allopatry (I). LÄS MER

  3. 2. Observational Studies of the Chemical Evolution in the Galactic Thin and Thick Disks

    Författare :Thomas Bensby; Astronomi - Genomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomi; Fysicumarkivet A:2004:Bensby;

    Sammanfattning : The origin and evolution of the thin and thick disks in the Galaxy have been studied by means of detailed stellar abundances. High-resolution spectra of 102 F and G dwarf stars have been obtained with the spectrographs on the ESO 3.6-m and ESO 1. LÄS MER

  4. 3. New aspects of voltage-gated calcium channel regulation in pancreatic beta-cells - Relevance for insulin release and type 2 diabetes

    Författare :Thomas Reinbothe; Diabetes - öpatofysiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; voltage-gated calcium channels; L-type; insulin secretion; type 2 diabetes;

    Sammanfattning : Voltage-gated Ca2+ channels are essential transducers of cellular signals in many electrically excitable cells. In the pancreatic beta-cell they mediate controlled Ca2+ influx, which is the final trigger for Ca2+ dependent release (exocytosis) of the blood glucose lowering hormone insulin. LÄS MER

  5. 4. Interaction between Electromagnetic Waves and Localized Plasma Oscillations

    Författare :Jan-Ove Hall; Thomas Leyser; Jan Trulsen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; space physics; plasma physics; radio waves; ionospheric modification; density depleations; field-aligned irregularities; lower hybrid solitary structures; lower hybrid cavities; Z mode waves; magnetosonic waves; scattering; mode conversion; Rymd- och plasmafysik; Space physics; Rymdfysik;

    Sammanfattning : This thesis treats interaction between electromagnetic waves and localized plasma oscillations. Two specific physical systems are considered, namely artificially excited magnetic field-aligned irregularities (striations) and naturally excited lower hybrid solitary structures (LHSS). LÄS MER

  7. 5. Children's Social Emotional Competence : Advances in assessment and practice

    Författare :Sarah Thomas; Laura Ferrer-Wreder; Lilianne Eninger; Petra Lindfors; Kyle Eichas; Kim Schonert-Reichl; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; social and emotional competence; empathy; moral development; early childhood care and education; Preschool and Kindergarten Behaviour Scales PKBS ; Sweden; Pakistan; Social Competence Scale - teacher version SCS-T ; Structural Equation Modeling; Bayesian factor analysis; psykologi; Psychology;

    Sammanfattning : The overall aim of this dissertation was to examine associations between different facets of children’s social emotional competence in culturally diverse samples. Specifically, I explored associations between relationship skills (i.e., cooperation, listening skills, turn-taking, seeking help), social awareness (i. LÄS MER