Search for dissertations about: "dioxins"

Showing result 1 - 5 of 51 swedish dissertations containing the word dioxins.

  1. 1. Polybrominated dibenzo-p-dioxins Natural formation mechanisms and biota retention, maternal transfer, and effects

    University dissertation from Umeå : Umeå Universitet

    Author : Kristina Arnoldsson; Umeå universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; polybrominated dibenzo-p-dioxins; PBDDs; Baltic Sea; uptake; retention; maternal transfer; metabolism; bioavailability; natural formation; precursor; bromoperoxidase; bromophenol; photochemical transformation; oxidative coupling; hydroxylated polybrominated diphenyl ethers; MEDICINE Chemistry; MEDICIN Kemi; Analytical Chemistry; analytisk kemi;

    Abstract : Polybrominated dibenzo-p-dioxins (PBDD) and dibenzofurans (PBDF) are a group of compounds of emerging interest as potential environmental stressors. Their structures as well as toxic responses are similar to the highly characterized toxicants polychlorinated dibenzo-p-dioxins. READ MORE

  2. 2. New tools for sample preparation and instrumental analysis of dioxins in environmental samples

    University dissertation from Umeå : Umeå universitet

    Author : Lan Do; Umeå universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; PCDD Fs; dioxins; pressurized liquid extraction; PLE; selective SPLE; modular M-PLE; soil; sediment; sludge; gas chromatography; new stationary phases; multivariate data analysis; selectivity; interaction; Environmental Science; miljövetenskap;

    Abstract : Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), two groups of structurally related chlorinated aromatic hydrocarbons, are of high concern due to their global distribution and extreme toxicity. Since they occur at very low levels, their analysis is complex, challenging and hence there is a need for efficient, reliable and rapid alternative analytical methods. READ MORE

  3. 3. Trace analysis of dioxins and dioxin-like PCBs using comprehensive two-dimensional gas chromatography with electron capture detection

    University dissertation from Umeå : Kemi

    Author : Conny Danielsson; Umeå universitet.; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Comprehensive two-dimensional gas chromatography; GC × GC; µECD; PCDDs; PCDFs; dioxins; dioxin-like PCBs; Pressurized liquid extraction; PLE; PLE-C; food; feed; fly ash; soil; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi;

    Abstract : Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), two groups of struc-turally related chlorinated aromatic hydrocarbons, generally referred to as “dioxins” are of great concern due to their extreme toxicity and presence in all compartments of the environment. Since they occur at very low levels, their analysis is complex and challenging, and there is a need for cost-efficient, reliable and rapid analytical alternatives to the expensive methods in-volving use of gas chromatography high-resolution mass spectrometry (GC-HRMS). READ MORE

  4. 4. Protein isolation from herring (Clupea harengus) using the pH-shift process - Protein yield, protein isolate quality and removal of food contaminants

    University dissertation from Chalmers University of Technology

    Author : Sofia Marmon; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Persistenta organiska föreningar; Persistent organic compounds; Övrig kemi; Other chemistry; Livsmedelsvetenskap; Food science; Livsmedelsteknik; Food technology; pH; acid; alkaline; solubilization; precipitation; herring; protein; dioxins; lipids; salt solubility; gelation; transmission electron microscopy; in vitro digestion;

    Abstract : Herring (Clupea harengus) contain valuable proteins but is difficult to process into high-quality foods due to its small size and high content of bones, heme-proteins and lipids. Herring is among the most abundant fish species in the world, but is currently utilized largely for fish meal and oil production. READ MORE

  5. 5. Fertility and female dietary exposure to persistent organochlorine compounds

    University dissertation from Anna Axmon, Dept of Occupational and Environmental Medicine, University Hospital, SE-221 85 Lund, Sweden

    Author : Anna Axmon; Lunds universitet.; Lund University.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; industrial medicine; Yrkesmedicin; arbetsmiljömedicin; Public health; epidemiology; Folkhälsa; epidemiologi; Occupational health; DDE; DDT; dioxins; polychlorinated biphenyls; persistent organochlorine compounds; stillbirths; miscarriages; Fertility; time to pregnancy;

    Abstract : Popular Abstract in Swedish Polyklorerade bifenyler (PCB) är ett samlingsnamn för ett antal kemiska föreningar. De utmärker sig genom att de har en god elektrisk isoleringsförmåga och tålighet för höga temperaturer, och de har därför använts i bl.a. transformatorer och kondensatorer men även som mjukgörare i plaster och färger. READ MORE