Sökning: "Leif Dahl"

Hittade 3 avhandlingar innehållade orden Leif Dahl.

  1. 1. Preparation and characterisation of perovskite and noble metal promoted oxide based catalysts

    Författare :Leif Dahl; Ragnar Larsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : This work concerns efforts to improve or replace noble-metal based catalysts used for car exhaust purification.Various oxide based catalysts have been prepared by impregnating washcoats such as (-Al2O3 and SiO2 with appropriate metal ions, and assemblies calcinated at elevated temperatures have been tested for catalytic activity in the oxidation of CO and C3H6 and reduction of NO. LÄS MER

  3. 2. Stem cell function and organ development : analysis of Lhx2 function in hematopoietic stem cells and eye development

    Författare :Lina Dahl; Leif Carlsson; Jan-Ingvar Jönsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Lhx2; hematopoietic system; hematopoietic stem cell; progenitor; embryonic stem cell; embryoid body; eye development; forebrain; eye field transcription factor; Molecular medicine genetics and pathology ; Molekylär medicin genetik och patologi ; molekylär medicin genetik och patologi ; molecular medicine  genetics and pathology ;

    Sammanfattning : When a multicellular organism suffers damages to tissues/organs it heals itself by either substituting the lost cellular matrix by scar formation or by regenerating the lost tissue. Regeneration likely occurs by a recapitulation of the developmental process that formed the organ. LÄS MER

  4. 3. Studies of the Ribosomal Protein S19 in Erythropoiesis

    Författare :Hans Matsson; Niklas Dahl; Leif Carlsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; RPS19; Rps19; erythropoiesis; erythroblastopenia; Diamond-Blackfan; anemia; Genetik; Genetics; Genetik;

    Sammanfattning : Ribosomal proteins are components of the ribosome, the protein synthesis machinery. The ribosomal protein S19 gene (RPS19) is mutated in Diamond-Blackfan anemia, DBA, which is a rare congenital anemia with absence or reduction of erythroid precursors in bone marrow. In this thesis, the role of RPS19 in erythropoiesis is investigated. LÄS MER