Sökning: "Mattias Persson"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Mattias Persson.

  1. 1. Lipases as Biocatalysts in Organic Media. Influence of Enzyme Preparation and Reaction Conditions on Activity and Selectivity

    Författare :Mattias Persson; Avdelningen för klinisk kemi och farmakologi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biochemical technology; Bioteknik; Biotechnology; water activity; temperature; enantioselectivity; immobilisation; organic solvents; lyophilisation; Lipases; Accurel EP-100; Biokemisk teknik; Proteins; enzymology; Proteiner; enzymologi;

    Sammanfattning : The discovery that enzymes can function in organic solvents has broadened the scope of biocatalysis, making enzymes highly useful tools for organic chemists. The widespread use of enzymes as catalysts in organic solvents has, however, been limited by the low activity obtained for enzymes in organic solvents compared to aqueous solutions. LÄS MER

  2. 2. Portfolio Selection and the Analysis of Risk and Time Diversification

    Författare :Mattias Persson; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economic policy; economic systems; economic theory; econometrics; Economics; Lower Partial Moment; Portfolio Selection; Parameter Uncertainty; Time Diversification; Bootstrap; Downside Risk; Estimation Risk; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik; Financial science; Finansiering;

    Sammanfattning : This thesis is devoted to the analysis of three important issues in financial economics in general and portfolio selection in particular: the risk measure, estimation risk and time diversification. Besides a short introductory chapter the thesis consists of four empirical essays. LÄS MER

  3. 3. Economic Evaluation of Mental Health Interventions for Children and Adolescents : the Case of Sweden

    Författare :Mattias Persson; Mikael Svensson; Lars Hultkrantz; Ivar Sønbø Kristiansen; Örebro universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Children; adolescents; mental health; bullying; economic evaluation; intellectual disability; transition; Economics; Nationalekonomi;

    Sammanfattning : The focus of this thesis is economic evaluations of programs and interventions regarding children and adolescents with mental health issues, victimization, and intellectual disabilities (ID). The first paper examines a potential link between mental health issues among adolescent and the class-size of the school class they are enrolled in. LÄS MER

  4. 4. Frequency response by wind farms in power systems with high wind power penetration

    Författare :Mattias Persson; Chalmers University of Technology; []
    Nyckelord :inertia estimation; frequency control; power system stability; wind power integration; Power system; synthetic inertia;

    Sammanfattning : The integration of variable speed wind turbines (VSWT) in power systems is increasing in order to reduce the emission of green house gases. This increase of power electronic converter interfaced generation causes a decrease of power system inertia, increasing the risk of load shedding and system frequency instability. LÄS MER

  5. 5. Development of Salt-Sensitive Hypertension in Hydronephrosis

    Författare :Mattias Carlström; Erik Persson; Nils Wåhlin; Russell Brown; Göran Bergström; Uppsala universitet; []
    Nyckelord :Physiology; blood pressure; nephrectomy; nitric oxide; oxidative stress; renal function; renin angiotensin system; salt-sensitivity; telemetry; tubuloglomerular feedback; ureteral obstruction; Fysiologi;

    Sammanfattning : Hydronephrosis, due to ureteropelvic junction obstruction, is a common condition in infants with an incidence of approximately 0.5-1%. During the last decade, the surgical management of non-symptomatic hydronephrosis has become more conservative, and the long-term physiological consequences of this new policy are unclear. LÄS MER