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Visar resultat 6 - 10 av 42 avhandlingar som matchar ovanstående sökkriterier.

  1. 6. Nanospintronics with Molecular Magnets - Tunneling and Spin-Electric Coupling

    Författare :Javier Francisco Nossa Márquez; Fasta tillståndets fysik; []
    Nyckelord :Molecular magnets; spin exchange; spin-orbit interaction; magnetic anisotropy; spin frustration; spin chirality; spin-electric control; quantum transport; Coulomb blockade; density functional theory; quantum master equation.;

    Sammanfattning : This dissertation investigates theoretically electric control of the magnetic properties of molecular magnets. Two classes of magnetic molecules are considered. The first class consists of molecules that are spin frustrated. LÄS MER

  3. 7. Molecular Evolution of the Vertebrate Genome

    Författare :Kiwoong Nam; Hans Ellegren; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis, I studied molecular evolution of the vertebrate genome, focusing on sex chromosomes, protein coding genes, and genome size variation. The evolutionary history of avian sex chromosomes was analyzed by comparing substitution rate among 12 gametologous gene pairs on the Z and W chromosomes. LÄS MER

  4. 8. New insights into the regulation of stomatal movements by red light, carbon dioxide and circadian rhythms

    Författare :Anastasia Matrosova; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Stomata are small adjustable pores formed by pairs of guard cells that enable gas exchange between leaves and the atmosphere, thus directly affecting water loss and CO₂ uptake in plants. The current work focuses on the regulation of stomatal movements by red light, carbon dioxide and the circadian system and attempts to uncover molecular mechanisms that control guard cell function. LÄS MER

  5. 9. Structure/function relationships of inorganic phosphate transporters

    Författare :Dieter R. Samyn; Bengt Persson; Hanna Sychrová; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic phosphate; transporters; Saccharomyces cerevisiae; Biochemistry; Biokemi; Biokemi; Biochemistry;

    Sammanfattning : Of the many nutrients that make the metabolic clock tick, inorganic phosphate fulfills an essential role in all yeast (and other organisms), being necessary for both structural and metabolic purposes. In order to transport phosphate into the cell interior, Saccharomyces cerevisiae makes use of two systems, comprising high- or low-affinity transporters, which are responsible for the cellular accumulation of inorganic phosphate. LÄS MER

  7. 10. Changes in the transcriptome and metabolome during the initiation of growth cessation in hybrid aspens

    Författare :Daniel Hoffman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : At 9 550 years of age, Old Rasmus, a Norway spruce (Picea abies), located in the Dalarna province in Sweden is recognized as the oldest surviving tree in the world. Old Rasmus exemplifies a robust capacity to survive in changing conditions, making trees a unique and fascinating subject for study. LÄS MER