Sökning: "Miljökemi"

Visar resultat 1 - 5 av 227 avhandlingar innehållade ordet Miljökemi.

  1. 1. Synthesis of highly brominated diphenyl ethers and aspects on photolysis and indoor spreading

    Detta är en avhandling från Stockholm : Institutionen för miljökemi

    Författare :Anna Christiansson; Stockholms universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : Adding chemicals to materials to decrease flammability can be dated back to as early as 450 BC when the Egyptians used alum to reduce flammability of wood. Almost 2500 years later brominated flame retardants (BFRs) are used to prevent ignition of textiles, electronics and polymers. LÄS MER

  2. 2. Temporal and spatial trends of organohalogens in guillemot (Uria aalge) from North Western Europe

    Detta är en avhandling från Stockholm : Institutionen för miljökemi

    Författare :Hrönn Jörundsdóttir; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic; environmental; monitoring; pollution; time trends; spatial trends; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : The Arctic and sub-Arctic region of the North Atlantic is a remote area, also in relations to environmental contaminants, such as POPs, BFRs and last but not least, PFCs. Both the BFRs and PFCs are considered emerging pollutants of significant environmental concern. LÄS MER

  3. 3. Brominated natural products at different trophic levels in the Baltic Sea Identification of polybrominated dioxins, hydroxylated and methoxylated diphenyl ethers

    Detta är en avhandling från Stockholm : Institutionen för miljökemi

    Författare :Anna Malmvärn; Stockholms universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polybrominated dibenzo-p-dioxins; hydroxylated polybrominated diphenyl ethers; methoxylated polybrominated diphenyl ethers; Baltic Sea; algae; natural production; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; Environmental Chemistry; miljökemi;

    Sammanfattning : Over time, the Baltic Sea has been contaminated by increasing discharges of pollutants from human activities. Persistent organic pollutants (POPs) have caused toxic effects in wildlife and excess of nutrients have led to eutrophication. LÄS MER

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

    Detta är en avhandling från Stockholm : Institutionen för miljökemi

    Författare :Daniel Teclechiel; Stockholms universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi 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. 5. Toxicologically important DDT metabolites Synthesis, enantioselective analysis and kinetics

    Detta är en avhandling från Stockholm : Department of Environmental Chemistry, Stockholm Univerisity

    Författare :Tatiana Cantillana; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; o; p -DDD; 3-Methylsulfonyl-DDE; adrenocorticolytic compounds; chiral; NATURAL SCIENCES Chemistry Environmental chemistry; NATURVETENSKAP Kemi Miljökemi; miljökemi; Environmental Chemistry;

    Sammanfattning : DDT was extensively and globally used as a pesticide in agriculture and for malaria vector control from the 1940’s until the 1970’s. Due to its heavy use, DDT became ubiquitously distributed throughout the environment. DDT and several DDT metabolites are persistent organic pollutants. LÄS MER