Sökning: "migration speed"

Visar resultat 16 - 20 av 45 avhandlingar innehållade orden migration speed.

  1. 16. Plasticized Poly (lactic acid) Films - Preparation and Properties

    Författare :Nadia Ljungberg; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase separation; aging; thermal properties; dynamic mechanical properties; processing; film preparation; oligomer synthesis; poly lactic acid ; plasticizers; migration; cold crystallization; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The development of biodegradable polymers from renewable resources is of importance in order to prevent the depletion of fossil fuels and the increasing emissions of carbon dioxide to the atmosphere caused by the commodity plastics of today. However, to be able to replace these non-environmentally friendly materials, production costs of biodegradable polymers have to be decreased and their physical properties need to be enhanced. LÄS MER

  3. 17. Pharmaceutical and Biomedical Applications of Spectroscopy in the Photon Migration Regime

    Författare :Tomas Svensson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Porosimetry; Biomedical optics; Pharmaceutical analysis; Monte Carlo; Scattering media; Photon migration; Laser spectroscopy; High-resolution spectroscopy; Time-resolved spectroscopy; Time-of-flight;

    Sammanfattning : The present thesis is devoted to two different matters: One part is the development of a novel optical technique for characterisation of solid pharmaceutical materials. The other part being the continued development of photon time-of-flight spectroscopy, as well as exploration of new application areas of this method. LÄS MER

  4. 18. Systems microscopy analysis of cell migration

    Författare :Hamdah Shafqat Abbasi; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Single cell migration is heterogeneous and a complicated process. It arises from a hugely complex network of multi-scale interactions between molecular and macromolecular entities. LÄS MER

  5. 19. Flight strategies in migrating birds: when and how to fly

    Författare :Martin Green; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; geese; waders; terns; Animal ecology; Djurekologi; wind tunnel; radio telemetry; satellite telemetry; radar; formation flight; flight speed adjustment; wind drift; energy savings; departure decisions; bird migration; wind;

    Sammanfattning : Wind has a profound influence on migrating birds since it inevitably will influence travel time and energy expenditure. In this thesis I investigate how migrating birds are affected by, and use winds. LÄS MER

  7. 20. Time and energy in long-distance bird migration

    Författare :Thord Fransson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zoologi; Zoology;

    Sammanfattning : Long-distance seasonal migration is energetically demanding and time consuming. For example, some passerine birds are on migration during six months of the year, travel more than 10 000 km and make use of many fuelling sites. Migration requires many different decisions, and an individual bird will face a variety of situations. LÄS MER