Search for dissertations about: "freezing"

Showing result 6 - 10 of 205 swedish dissertations containing the word freezing.

  2. 6. Cold Acclimation in oats and other plants: Dissecting low temperature responses using a comparative genomic approach

    Author : Marcus Bräutigam; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cold acclimation; oat; EST; microarray; transcriptome; chilling; freezing; rice; Arabidopsis; TILLING; mutation;

    Abstract : Cold acclimation protects plants from temperate regions of the world from the deleterious effects of low and freezing temperatures. This is through a series of transcriptional, regulatory and metabolic changes that enable continued growth and survival. READ MORE

  4. 7. Unravelling the complexity of cold acclimation in plants

    Author : Aakash Chawade; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bioinformatics; cold acclimation; winter; oat; arabidopsis; stress; freezing; genetic networks; metabolomics;

    Abstract : Many plants respond to low non-freezing temperatures by increasing their freezing tolerance in a process known as cold acclimation. Microarray studies have shown that hundreds of genes are differentially expressed during the cold acclimation process in Arabidopsis. READ MORE

  5. 8. Numerical models for degradation of concrete in hydraulic structures due to long-term contact with water

    Author : Daniel Eriksson; Anders Ansell; Richard Malm; Erik Nordström; Katja Fridh; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; degradation; deterioration mechanisms; hydraulic structures; air-entrained concrete; multiphase model; long-term moisture conditions; pore size distribution; freezing; partially saturated; finite element method; Civil and Architectural Engineering; Byggvetenskap;

    Abstract : The durability of concrete is of major concern in all types of concrete structures where the combined effect of exposure conditions and the type and quality of the concrete material usually determines the rate of degradation. Furthermore, there are synergy effects between different deterioration mechanisms, which means that the combined rate of degradation is higher than the sum of the individual rates of each mechanism. READ MORE

  6. 9. Genetically Engineered Plants: Improved stress tolerance, growth and facilitated protein purification

    Author : Gösta Lilius; Tillämpad biokemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; glycine betaine; gene; freezing; flooding; drought; dicoteledones; desiccation; compatible solutes; cold; choline dehydrogenase; chill; CDH; betaine; betA; alkaloids anoxia; affinity purification; affinity tags; handles; hemoglobin; hypoxia; low temperatu; Biotechnology; Bioteknik;

    Abstract : Heterologous genes were expressed in plants in which the overall goal was to increase the value of the final crop. Various aspects were explored and evaluated, such as improving the stress tolerance, enhancing the availability of oxygen in growing cells and producing rare proteins with increased degrees of purity. READ MORE

  7. 10. The Bentonite Barrier - Swelling Properties, Redox Chemistry and Mineral Evolution

    Author : Daniel Svensson; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; montmorillonite; bentonite; smectite; freezing; thawing; hydration; intercalation; four-water-layer; ethylene glycol; X-ray diffraction; time-resolved; spatial-resolution; XANES; Fe; redox; iron; ABM; TBT; Äspö;

    Abstract : Bentonite is planned for use as a buffer material in high-level radioactive waste repositories, where safety assessment is performed for very long periods (100-1000 ka). This thesis focuses on the swelling of smectites in liquid water, and analysis of bentonite from field experiments at Äspö Hard Rock Laboratory, Sweden. READ MORE