Sökning: "Tetrapods"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Tetrapods.

  1. 1. Evolution of the synovial joints in Osteichthyes : Cells displaying functional similarities to synoviocytes in zebrafish Danio rerio

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Sara Gillnäs; [2019]
    Nyckelord :synovial joints; development; zebrafish; synoviocytes;

    Sammanfattning : Synovial joints enable frictionless movement between the adjacent bones. Lubricating fluid enclosed within the joint reduce the pressure to allow free movement. LÄS MER

  3. 2. Late Devonian vertebrates from Siberia: a synchrotron microtomography study of bone bed material

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Étienne Fortier-Dubois; [2016]
    Nyckelord :Siberia; Late Devonian; Megistolepis; paleontology; microtomography; vertebrates; synchrotron; stem tetrapods; fossil;

    Sammanfattning : This is an investigation of new vertebrate fossil material from the Late Devonian locality of Ivanovka, Uryup River, Siberia. This bone bed material, circa 375 million years in age, represents a unique opportunity to fill a gap in our understanding of Late Devonian diversity, biogeography, and vertebrate evolution: Siberia, at the time, was an independent continent, and yet its fauna remains virtually unknown in comparison with the other paleocontinents, Euramerica and Gondwana. LÄS MER

  4. 3. Evaluation of Zinc Oxide Nano-Microtetrapods for Biomolecule Sensing Applications

    Master-uppsats, KTH/Funktionella material, FNM

    Författare :Wei Zhao; [2015]
    Nyckelord :zinc oxide tetrapods; nano-microstructure; glucose oxidase; glucose sensor;

    Sammanfattning : Zinc oxide (ZnO) is a well-known II-VI semiconductor material that has gained renewed interest in the past decade due to the developments of growth technologies and the availability of high-quality ZnO bulk single crystals. Owing to a wide direct band gap (3. LÄS MER

  5. 4. Palaeoenvironments of the Earliest (Middle Devonian) Tetrapod Trackways from the Holy Cross Mountains, Poland; Locomotion in a Terrestrial Setting?

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Martin Qvarnström; [2015]
    Nyckelord :Tetrapods; palaeoenvironment; trackways; paleosols; microfacies; trace fossils; fin-limb transition; Holy Cross Mountains.;

    Sammanfattning : The palaeoenvironment from which early tetrapods emerged is crucial to comprehend in order to understand the mechanisms that drove and allowed the terrestrialization of vertebrates; one of the most important evolutionary ‘events’ in the history of animals. Nevertheless, much of the terrestrialization is shrouded in obscurity, inter alia, due to scarcity of early tetrapods in the fossil record. LÄS MER

  7. 5. Gene expression, phylogenetic and syntenic analyses of pantophysin (Pan I) and synaptophysin-like2 (Sypl2) genes in Atlantic cod (Gadus morhua L.)

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Suzana Stjelja; [2012]
    Nyckelord :Gene expression; fish; evolution; phylogeny;

    Sammanfattning : The pantophysin (Pan I) locus reveals differences between Norwegian coastal cod (NCC) and Northeast Arctic cod (NEAC) populations that are highly significant, temporally stable and larger than for any other genetic marker. However, the biochemical basis for the selection and the functional role of pantophysin in fishes are unknown. LÄS MER