Search for dissertations about: "Large strains"

Showing result 11 - 15 of 306 swedish dissertations containing the words Large strains.

  2. 11. Cyanobacterial Hydrogen Metabolism : Transcriptional Regulation of the Hydrogenases in Filamentous Strains

    Author : Rikard Axelsson; Peter Lindblad; Tomás Ruiz-Argüeso; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; Molekylärbiologi; Molecular biology; Molekylärbiologi;

    Abstract : Cyanobacteria are a heterogeneous group of phototrophic microorganisms. Many cyanobacteria have the capacity to fix atmospheric nitrogen. During the process of nitrogen fixation, molecular hydrogen is produced. Three enzymes are directly involved in hydrogen metabolism in cyanobacteria. READ MORE

  4. 12. Colonization, persistence and virulence factors in Escherichia coli strains in the human intestinal microflora

    Author : Forough Nowrouzian; Göteborgs universitet; []
    Keywords : Escherichia coli; large intestine; infant; newborn; bacterial adhesins; hemolysins;

    Abstract : Escherichia coli is a member of the normal intestinal microflora of man and many animals. In this thesis, various aspects of the E. coli colonization pattern were studied, especially the role of so called virulence factors for persistence of E. coli in the gut microflora. READ MORE

  5. 13. Fatigue crack growth experiments and analyses - from small scale to large scale yielding at constant and variable amplitude loading

    Author : Pär Ljustell; Fred L. Nilsson; Bo Alfredsson; Gunnar Härkegård; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fracture mechanics; fatigue crack growth; finite elements analysis; small scale yielding SSY ; large scale yielding LSY ; low cycle fatigue LCF ; crack tip opening displacement CTOD ; crack closure; potential drop method; constant amplitude load; variable amplitude load; inconel 718; stainless steel 316L;

    Abstract : This thesis is on fatigue crack growth experiments and assessments of fatigue crack growth rates. Both constant and variable amplitude loads in two different materials are considered; a nickel based super-alloy Inconel 718 and a stainless steel 316L. READ MORE

  6. 14. Susceptibility to Acute Decompensated Heart Failure in Two Common Mouse Strains

    Author : Mediha Becriovic-Agic; Michael Hultström; Lena Jonasson; Uppsala universitet; []
    Keywords : ;

    Abstract : Heart failure is a clinical syndrome characterized by an inability of the heart to meet oxygen demands of the body. During the initial stage of heart failure development compensatory mechanisms are activated to help the heart sustain proper function. Over time these compensatory mechanisms become inadequate resulting in decompensation. READ MORE

  7. 15. Manufacturihng of heavy rings and large copper canisters by plastic deformation

    Author : Hamzah Ssemakula; KTH; []
    Keywords : pores; grain size; low forginnig load; effective strain;

    Abstract : Plastic deformation processes transform material fromas-received state to products meeting certain requirements inproperties, microstructure and shape. To achieve thistransformation, the relationship between material response andprocess conditions should be understood. READ MORE