Sökning: "relative retention time"

Visar resultat 16 - 20 av 24 avhandlingar innehållade orden relative retention time.

  1. 16. Storage of Hydrogen Peroxide Bleached Mechanical Pulp : Reduction in Reflectance over the Visible Spectrum

    Författare :Sofia Enberg; Per Engstrand; Magnus Paulsson; Mats Rundlöf; Patrik Axelsson; Øyvind Eriksen; Yonghao Ni; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The objective of this thesis is to determine possible causes of the darkening of hydrogen peroxide bleached mechanical pulp over the visible spectrum and their relative contributions. It focuses on both process conditions and the composition of the pulp and the dilution water, including additions or losses of material along the process line from the bleach tower to the paper machine. LÄS MER

  3. 17. Acquired Epilepsy with a Focus on Stroke: Treatment and Prognosis

    Författare :David Larsson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; epilepsy; seizure; stroke; cerebrovascular disease; antiseizure medication;

    Sammanfattning : The relationship between epilepsy and stroke is complicated. While stroke is a major cause of epilepsy after middle age, there is also evidence that the risk of stroke is increased in persons with epilepsy. The overall aim of this dissertation is to elaborate on the prognosis and treatment of epilepsy in older adults and its association to stroke. LÄS MER

  4. 18. Computational patient models for simulation of dynamic gamma-camera imaging : Application to renography and peptide receptor radionuclide therapy

    Författare :Gustav Brolin; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nuclear medicine; Gamma camera; Renography; Radionuclide therapy; Internal dosimetry; Pharmacokinetics;

    Sammanfattning : Many nuclear medicine investigations rely on gamma-camera imaging to study and quantify the distribution of radiopharmaceuticals or radionuclides in the patient as a function of time. This is typically used for diagnostic studies of physiological functions or for calculation of absorbed doses following radionuclide therapy. LÄS MER

  5. 19. Macronutrient cycling in surface waters : large-scale patterns and assessment of global change

    Författare :Maria Khalili; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The levels and relative proportions of macronutrients set the conditions for life in surface waters. Man-made disturbances to macronutrient cycling have caused environmental problems such as eutrophication, acidification and global change. LÄS MER

  7. 20. Weathering kinetics of sulphidic mining waste

    Författare :Bo Strömberg; KTH; []
    Nyckelord :;

    Sammanfattning : The leaching of soluble metal contaminants from mining wasteis of great environmental concern, since it represents a threatto the surrounding aquatic environment. In this thesis,geochemical processes that contribute to the release of acidicmine drainage from waste rock are investigated. LÄS MER