Sökning: "Organic contaminants"

Visar resultat 1 - 5 av 128 avhandlingar innehållade orden Organic contaminants.

  1. 1. Bioavailability of organic contaminants in a changing climate

    Författare :Matyas Ripszam; Peter Haglund; Roland Kallenborn; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; climate change; organic contaminants; sorption; dissolved organic carbon; bioavailability;

    Sammanfattning : The effects of predicted future climate change was investigated with special emphasis on the association of organic contaminants with dissolved organic carbon (DOC) in the Baltic Sea.An automated method was developed for the measurements of DOC - water distribution constants at realistic DOC concentrations in brackish water. LÄS MER

  3. 2. Limitations and possibilities for microbial degradation of organic contaminants in aquifers

    Författare :Christel Carlsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ekologi; mycology; Mikrobiologi; Hydrobiology; biodegradation; Organic contaminants; redox conditions; sorption; DOM; cometabolism; biomass; microbial activity; microbial community composition; Ecology; Microbiology; bacteriology; virology; bakteriologi; mykologi; virologi; aquatic ecology; marine biology; limnology; Miljökemi; Environmental chemistry; akvatisk ekologi; Marinbiologi; limnologi;

    Sammanfattning : Many factors can influence the rate of microbial degradation of organic contaminants in aquifers. Some of these factors, e.g. LÄS MER

  4. 3. Optimizing nontarget workflows for identification of organic contaminants in various matrices

    Författare :Florian Dubocq; Anna Kärrman; Thanh Wang; Juliane Hollender; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nontarget analysis; workflow optimization; statistical analysis; mass defect plot; organic contaminants; environmental matrices;

    Sammanfattning : Since year 2000, production of chemicals around the world has more than doubled. Chemicals are used in many and diverse applications in our everyday life and even if their properties are useful, some can have a negative impact on environment and humans. LÄS MER

  5. 4. Simplifying complex models : Application of modeling tools in exposure assessment of organic pollutants

    Författare :Emma Undeman; Michael McLachlan; Kathrin Fenner; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mass balance model; environmental modeling; exposure modeling; bioaccumulation; organic contaminants; emission estimate; plant model; steady state; poly parameter linear free energy relationship; PPLFER; ecosystem susceptibility; Environmental chemistry; Miljökemi; Persistent organic compounds; Persistenta organiska föreningar; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Thousands of chemicals are used in society, but the exposure to humans and other organisms has been measured only for a small number of compounds. Modeling tools constitute low-cost and effective alternatives to measurements for the assessment of exposure. LÄS MER

  7. 5. Catalytic Amide Reductions under Hydrosilylation Conditions

    Författare :Alexey Volkov; Hans Adolfsson; Andrei K. Yudin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrosilylation; amides; reduction; chemoselectivity; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis covers the development of catalytic methodologies for the mild and chemoselective reductions of amides. The first part of the thesis describes the use of a Fe(II)/NHC catalyst for the deoxygenation of aromatic tertiary amides to corresponding amines. LÄS MER