Sökning: "relative response factor"

Visar resultat 1 - 5 av 98 avhandlingar innehållade orden relative response factor.

  1. 1. Properties and analysis of dioxin-like compounds in marine samples from Sweden

    Författare :Kjell Lundgren; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; planar dioxin-like compound; polychlorinated dibenzofuran; polychlorinated biphenyl; polychlorinated naphthalene; alkylated polychlorinated dibenzofuran; high-performance liquid chromatography; PX-21 carbon column; biomagnification factor; biota to sediment accumulation factor; fluxes; relative retention time; mass spectrometry; relative response factor; ultra-violet spectroscopy; Miljökemi; Environmental chemistry; Miljökemi; analytisk kemi; Analytical Chemistry;

    Sammanfattning : Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (PCBs) have been assigned toxic equivalency factors (TEFs). These compounds are today routinely analysed with sophisticated analytical techniques. LÄS MER

  3. 2. Composite Likelihood Estimation for Latent Variable Models with Ordinal and Continuous, or Ranking Variables

    Författare :Myrsini Katsikatsou; Fan Yang-Wallentin; Irini Moustaki; Karl Gustav Jöreskog; Ruggero Bellio; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; latent variable models; factor analysis; structural equation models; Thurstonian model; item response theory; composite likelihood estimation; pairwise likelihood estimation; maximum likelihood; weighted least squares; ordinal variables; ranking variables; lavaan; Statistics; Statistik;

    Sammanfattning : The estimation of latent variable models with ordinal and continuous, or ranking variables is the research focus of this thesis. The existing estimation methods are discussed and a composite likelihood approach is developed. LÄS MER

  4. 3. Studies of the pathogenesis of hemolytic uremic syndrome and thrombotic thrombocytopenic purpura

    Författare :Diana Karpman; Lund Pediatrik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pediatri; Pediatrics; tumor necrosis factor; interleukin 6; von Willebrand factor; apoptosis; lipopolysaccharide; shiga-like toxin; Escherichia coli O157:H7; Hemolytic uremic syndrome; thrombotic thrombocytopenic purpura; Urology; nephrology; Urologi; nefrologi;

    Sammanfattning : This study investigated the pathogenesis of hemolytic uremic syndrome (HUS) and thrombotic thrombocytopenic purpura (TTP). (1) The relative roles of lipopolysaccharide and Shiga-like toxin-2 were studied in a mouse model of Escherichia coli O157:H7 infection. LÄS MER

  5. 4. The complement system in stherosclerosis and arthritis

    Författare :Linda Persson; Göteborgs universitet; []
    Nyckelord :complement; C3; factor B; ASP; atherosclerosis; hyperlipidemia; arthritis;

    Sammanfattning : The complement system plays an essential role in the humoral immune response. Activated complement has diverse functions, including the initiation of inflammation, recruitment of leukocytes, clearance of immune complexes, neutralization of pathogens, regulation of antibody responses and disruption of cell membranes. LÄS MER

  7. 5. Malignancies in Sweden after the Chernobyl accident in 1986

    Författare :Martin Tondel; Bodil Persson; Lennart Hardell; Bengt Järvholm; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Epidemiology; Environmental; Chernobyl; ionising radiation; geographical information systems GIS; 8-OHdG; Malignancies; Low dose; Dose-response; Latency; Causalty; Epidemiology; Epidemiologi;

    Sammanfattning : On 26 April 1986 an accident occurred in the Chernobyl nuclear power plant resulting in the release of large amount of radionuclides. Almost five percent of the total released caesium-137 was deposited in Sweden. The incidence of malignancies in the most affected counties in Sweden was investigated in three epidemiological studies. LÄS MER