Sökning: "Sigfridsson"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet Sigfridsson.

  1. 1. Theoretical studies of porphyrin proteins

    Författare :Emma Sigfridsson; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecular mechanics; quantum chemical calculations; electrostatic potential charges; atomic charges; ferrochelatase; cytochrome; myoglobin; Porphyrin; haem; QM MM; reorganisation energy; Theoretical chemistry; quantum chemistry; Teoretisk kemi; kvantkemi;

    Sammanfattning : Different aspects of porphyrin proteins have been studied with theoretical methods. For example, we have studied: - The importance of hydrogen bonds for the discrimination between carbon monoxide and molecular oxygen by myoglobin, the oxygen carrier in muscles, modelling the active site both in vacuum and in the protein matrix - The inner-sphere reorganisation energy during electron transfer for cytochromes compared to other electron-transfer proteins, such as blue copper proteins and Fe-S clusters - The role of porphyrin distortions in the reaction mechanism of ferrochelatase, the enzyme that inserts an iron ion into protoporphyrin IX to make haem - The interaction between different metal sites in ferrochelatase In these studies we have used density functional theory, classical force field methods, and a combination of quantum chemistry and molecular mechanics. LÄS MER

  3. 2. Strategisk ekonomistyrning i tidningsföretag : aktionsforskning i ekonomisk ledningsinformation

    Författare :Jan Sigfridsson; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ekonomistyrning-- Tidningsföretag;

    Sammanfattning : .... LÄS MER

  4. 3. Självklara drycker? : kaffe och alkohol i social samvaro

    Författare :Ingegerd Sigfridsson; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES;

    Sammanfattning : Gemenskap och samhörighet kan visas genom att dricka en dryck tillsammans. Det kan innebära att gemenskapen tillsammans är så mycket viktigare än själva drycken, vilket i sig kan medföra att man dricker en dryck trots att man inte egentligen inte tycker om den. ”Den första är alltid värst”, säger en ung man som är intervjuad. LÄS MER

  5. 4. Multidimensional MRI of Cardiac Motion : Acquisition, Reconstruction and Visualization

    Författare :Andreas Sigfridsson; Hans Knutsson; Stefan Skare; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MRI; cardiac; motion; reconstruction; Image analysis; Bildanalys;

    Sammanfattning : Methods for measuring deformation and motion of the human heart in-vivo are crucial in the assessment of cardiac function. Applications ranging from basic physiological research, through early detection of disease to follow-up studies, all benefit from improved methods of measuring the dynamics of the heart. LÄS MER

  7. 5. Multidimensional MRI  of Myocardial Dynamics : Acquisition, Reconstruction and Visualization

    Författare :Andreas Sigfridsson; Hans Knutsson; Sebastian Kozerke; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MRI; Cardiac motion; myocardial dynamics; strain; tensor; deformation; DENSE; k-t BLAST; Medical engineering; Medicinsk teknik;

    Sammanfattning : Methods for measuring deformation and motion of the human heart in-vivo are crucial in the assessment of cardiac function. Applications ranging from basic physiological research, through early detection of disease to follow-up studies, all rely on the quality of the measurements of heart dynamics. LÄS MER