Sökning: "nygren"

Visar resultat 21 - 25 av 180 avhandlingar innehållade ordet nygren.

  1. 21. Evolutionary Consequences of Reproductive Strategies : Testing Theory on Sex and Reproductive Gene Evolution in the Fungal Model Neurospora

    Författare :Kristiina Nygren; Hanna Johannesson; Tatiana Giraud; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : In this thesis, I used the filamentous ascomycete genus Neurospora as a model to test theoretical predictions on the evolutionary consequences of different reproductive strategies and reproductive gene evolution. The genus Neurospora contains taxa representing a diversity of reproductive strategies, and here I constructed a phylogeny by which I was able to show that several independent transitions in reproductive mode have occurred in the evolutionary history of the genus. LÄS MER

  3. 22. Magnetron Sputtering of Nanocomposite Carbide Coatings for Electrical Contacts

    Författare :Kristian Nygren; Ulf Jansson; Peter Leisner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transition metal carbide; amorphous carbon; composite; contact resistance; corrosion; friction; optical properties;

    Sammanfattning : Today’s electronic society relies on the functionality of electrical contacts. To achieve good contact properties, surface coatings are normally applied. Such coatings should ideally fulfill a combination of different properties, like high electrical conductivity, high corrosion resistance, high wear resistance and low cost. LÄS MER

  4. 23. Mantle cell lymphoma : studies of predictive markers, the role of the microenvironment in disease development and identification of new potential targets for therapy

    Författare :Lina Nygren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Mantle cell lymphoma (MCL) is an aggressive B cell lymphoma and accounts for 5-10 % of all non-Hodgkin lymphomas (NHL). In Sweden, the incidence of NHL is 21.6 and 15.3 per 100 000 persons for men and women, respectively, which result in almost 100-200 new MCL cases per year. LÄS MER

  5. 24. Impact of climate variability on dynamic groundwater storage in mid- to high latitude countries

    Författare :Michelle Nygren; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climate change; time series analysis; groundwater statistics; Sweden; drought; cold region hydrogeology; groundwater memory;

    Sammanfattning : Climate change will alter the hydrological cycle, potentially changing dynamic groundwater storage and increasing groundwater drought risk. Climate influences groundwater storage directly via changes in groundwater recharge, but groundwater drought responsiveness further depends on groundwater system characteristics. LÄS MER

  7. 25. Safety management on multi-employer worksites : Responsibilities and power relations in the mining industry

    Författare :Magnus Nygren; Lena Abrahamsson; Mats Jakobsson; Johan Sanne; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Arbetsvetenskap; Human Work Sciences;

    Sammanfattning : The focus of this thesis is on the division of legal responsibilities for occupational safety management on multi-employer worksites in the mining industry. The empirical basis is a study conducted between 2013 and 2016 consisting of interviews and observations focusing on primarily managers, supervisors, coordinators and safety specialists from a Swedish mining company and a number of its contractors. LÄS MER