Sökning: "Environmental Chemistry miljökemi"

Visar resultat 11 - 15 av 139 avhandlingar innehållade orden Environmental Chemistry miljökemi.

  1. 11. Metabolism of some polychlorinated biphenyl and polybrominated diphenyl ether congeners in the rat

    Författare :Anna Sandholm; Bert-Ove Lund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : For the understanding of the metabolic fate of xenobiotics, in vivo studies are needed. In this thesis the metabolism of CB-28 and CB-77 and BDE-209 in the rat are determined. In addition, pharmacokinetic studies of CB-28 and BDE- 209 are included. The compounds were radiolabelled and their excretion and tissue distribution determined. LÄS MER

  3. 12. Identification and origin of potential background carcinogens : endogenous isoprene and oxiranes, dietary acrylamide

    Författare :Eden Tareke; Rafter Joseph; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : The primary aims of this thesis are to discover carcinogens in the general population by identification of products of reaction with hemoglobin (Hb adducts) in blood from humans without known exposure, and tracing the origin of the adducts. Chemicals and/or their metabolites forming Hb adducts mostly also react with DNA and may thus cause mutations, a key event in carcinogenesis. LÄS MER

  4. 13. Synthesis and characterization of highly polybrominated diphenyl ethers

    Författare :Daniel Teclechiel; Göran Marsh; Vladimir Nikiforov; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : Polybrominated diphenyl ethers (PBDEs) make up an important class of brominated flame retardants. The present production is mainly concentrated to DecaBDE but until recently also a significant production of PentaBDE and OctaBDE took place, leaving us with a large number of different PBDE congeners. LÄS MER

  5. 14. Environmental levels of thallium : influence of redox properties and anthropogenic sources

    Författare :Ulrika Karlsson; Stefan Karlsson; Anders Düker; Roger Herbert; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; thallium; Tl I ; Tl III ; separation; ion chromatography; fresh water; sediment; mine waste; fly ash; redistribution; ICP-MS; Environmental chemistry; Miljökemi; Kemi; Chemistry;

    Sammanfattning : Thallium is a highly toxic element that humans are exposed to mainly by consumption of drinking water and vegetables grown in soil with high thallium content but also through inhalation of particles in the air. Thallium is also present in fossil fuels, alloys, and in electronic utilities. LÄS MER

  7. 15. Identification of brominated organic compounds in aquatic biota and exploration of bromine isotope analysis for source apportionment

    Författare :Maria Unger; Örjan Gustafsson; Lillemor Asplund; Per Andersson; Sheryl Tittlemier; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polybrominated dibenzo-p-dioxins PBDDs ; NMR spectroscopy; preparative capillary gas chromatography PCGC ; stable bromine isotope ratio; GC-multiple collector- ICP-MS; Environmental chemistry; Miljökemi; miljökemi; Environmental Chemistry;

    Sammanfattning : Brominated organic compounds (BOCs) of both natural and anthropogenic origin are abundant in the environment. Most compounds are either clearly natural or clearly anthropogenic but some are of either mixed or uncertain origin. LÄS MER