Sökning: "Evolution"

Visar resultat 1 - 5 av 2759 avhandlingar innehållade ordet Evolution.

  1. 1. Biased Evolution : Causes and Consequences

    Författare :Gerrit Brandis; Diarmaid Hughes; Erik Böttger; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Evolution; Codon usage bias; Post-transcriptional regulation; Recombination; Inversion; EF-Tu; Frameshift suppression; Antibiotic resistance; Rifampicin; Ciprofloxacin; Compensatory evolution; Drug efflux; RNA polymerase; DNA gyrase; Mikrobiologi; Microbiology;

    Sammanfattning : In evolution alternative genetic trajectories can potentially lead to similar phenotypic outcomes. However, certain trajectories are preferred over others. These preferences bias the genomes of living organisms and the underlying processes can be observed in ongoing evolution. LÄS MER

  2. 2. Encountering Evolution : Children's Meaning-Making Processes in Collaborative Interactions

    Författare :Johanna Frejd; Magnus Hultén; Karin Stolpe; Konrad Schönborn; Christina Siry; Linköpings universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Meaning-making processes; Science Education; Evolution; Multimodality; Collaborative Interaction; Exploratory studies; Meningsskapandeprocesser; Naturvetenskapsundervisning; Evolution; Multimodalitet; Interaktion; Explorativa studier;

    Sammanfattning : This thesis explores preschool class children’s meaning making processes when they encounter evolution. By adopting social semiotic and sociocultural perspectives on meaning making, three group-based tasks were designed. Video data from the activities were analysed using a multimodal approach. LÄS MER

  3. 3. Modelling Evolution : From non-life, to life, to a variety of life

    Författare :Yu Liu; David J. T. Sumpter; Peter Dittrich; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; NATURAL SCIENCES; Mathematical biology; Biocomplexity; Artificial chemistry; Ecosystem evolution; Origin of life; Self-replication; Prebiotic evolution; Collectively-catalytic; Golden ratio; Tillämpad matematik och statistik; Applied Mathematics and Statistics;

    Sammanfattning : Life is able to replicate itself, e.g., a microorganism is able to divide into two identical ones, and a single plant is able to forest a whole island. LÄS MER

  4. 4. Open Government Data as a Reform and Ecosystem : A conceptual framework for evolution and health

    Författare :Jonathan Crusoe; Ulf Melin; Gustaf Juell-Skielse; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Open Government Data; Reform; Ecosystem; Health; Evolution; Impediment; Barrier; Risk; Enricher; User; Seeker; Provider; Publisher; Öppna data; ekosystem; reform; hälsa; evolution; hinder; barriär; risk; berikare; användare; sökare; medborgare; tillgängliggörare; publicerare;

    Sammanfattning : Introduction: This doctoral thesis in Information Systems disentangles the interplay of an OGD reform and an OGD ecosystem. Open government data (OGD) refers to data shared by public organizations, in the role of providers, following certain principles for anyone to reuse. LÄS MER

  5. 5. Experimental Evolution : and Fitness Effects of Mutations

    Författare :Anna Knöppel; Dan I Andersson; Stanley Maloy; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Experimental evolution; Fitness effects; mutations; S20; fis; ribosome; horizontal gene transfer; adaptation; synonymous mutations; Mikrobiologi; Microbiology;

    Sammanfattning : Bacteria have small, streamlined genomes and evolve rapidly. Their large population sizes allow selection to be the main driver of evolution. With advances in sequencing technologies and precise methods for genetic engineering, many bacteria are excellent models for studying elementary questions in evolutionary biology. LÄS MER