Sökning: "Rekombination"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet Rekombination.

  1. 1. Untersuchung der prozessabhängigen Ladungsträgerrekombination an Versetzungen in Siliziumsolarzellen

    Författare :Markus Rinio; Hans Joachim Möller; Deutschland der Technischen Universität Bergakademie Freiberg Fakultät für Chemie und Physik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dislocations; silicon; solar cell; LBIC; Solarzelle; Versetzung; Silicium; Rekombination; Getterung; Kurzschlussstrom; Blockguss; Physics; Fysik;

    Sammanfattning : Die Dissertation demonstriert ein Verfahren zur Messung der normalisierten Rekombinationsstärke (Gamma) von Versetzungen in blockerstarrten Siliziumsolarzellen. Es basiert auf der topografischen Messung der internen Quanteneffizienz IQE und der Versetzungsdichte. LÄS MER

  3. 2. Environmental Contaminants, Recombination and Cancer : Investigations on the molecular mechanisms of spontaneous and induced recombination in the hprt gene of Chinese hamster cells

    Författare :Thomas Helleday; Mark Meuth; Stockholms universitet; []
    Nyckelord :toxikologisk genetik; Genetic Toxicology;

    Sammanfattning : Recombination results in rearrangement of the genetic material contained in the chromosomes inherited from the mother and father and this process is also involved in repairing damage to the genome. Occasionally, the machinery that performs recombination malfunctions and this may lead to illegitimate recombination events which inactivate tumor suppressor genes or activate protooncogenes. LÄS MER

  4. 3. Asymptotics, weak convergence and duality in population genetics

    Författare :Martina Favero; Henrik Hult; Alison Etheridge; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis consists of four papers on asymptotic results and stochastic duality for some processes in mathematical population genetics. The focus is on Wright-Fisher diffusions and coalescent processes, which model, respectively, the evolution of frequencies of genetic types and genealogies in a population,and play a key role in inference on genetic data sets. LÄS MER

  5. 4. Reconciling gene family evolution and species evolution

    Författare :Joel Sjöstrand; Jens Lagergren; Nicolas Lartillot; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computational biology; Bioinformatics; Phylogenetics; Phylogenomics; Comparative genomics; Evolutionary biology; datalogi; Computer Science;

    Sammanfattning : Species evolution can often be adequately described with a phylogenetic tree. Interestingly, this is the case also for the evolution of homologous genes; a gene in an ancestral species may – through gene duplication, gene loss, lateral gene transfer (LGT), and speciation events – give rise to a gene family distributed across contemporaneous species. LÄS MER

  7. 5. Excitonic and charge carrier transport in organic materials and device applications

    Författare :Qingzhen Bian; Olle Inganäs; Feng Gao; Ergang Wang; Guglielmo Lanzani; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : With the potential for future commercial use, organic electronics have been intensively studied for the last few decades. To exploit the next generation of high-performance devices, detailed study of the underlying physics is essential. LÄS MER