Search for dissertations about: "avian embryo"

Found 3 swedish dissertations containing the words avian embryo.

  2. 1. Environmental pollutants and the reproductive system in birds : Developmental effects of estrogenic compounds

    Author : Cecilia Berg; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Avian embryo; test system; xeno-estrogen; endocrine disruption; reproductive organ differentiation; oviduct; testis; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Ecotoxicology; ekotoxikologi;

    Abstract : A number of environmental pollutants have been shown to mimick the action of the female sex hormone estrogen and are, therefore, suspected to be responsible for reproductive abnormalities seen in wildlife. Test systems which can be used in hazard and risk assessment of chemicals with estrogenic effects are consequently needed. READ MORE

  4. 2. Comparative avian developmental toxicity of PFAAs

    Author : Marcus Nordén; Magnus Engwall; Krister Halldin; Anders Bignert; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; chicken; herring gull; cormorant; PFAA; PFOS; PFOA; toxicity; levels; Biology; Biologi;

    Abstract : Perfluoroalkyl acids (PFAAs) are persistent organic pollutants that can commonly be found in environmental matrixes and wildlife from all over the globe. The PFAAs have been used in applications such as water and dirt repelling treatments for textiles, oil-resistant paper coatings and fire-fighting foams. READ MORE

  5. 3. Bioassay analysis of dioxin-like compounds : response interactions and environmental transformation of Ah receptor agonists

    Author : Helena Olsman; Magnus Engwall; John P. Giesy; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bioassay; dioxin-like; Ah receptor; Biology; Biologi; Biology; Biologi;

    Abstract : Dioxin-like compounds mediate their toxicity by binding to the aryl hydrocarbon receptor (AhR) and through this receptor a cascade of biochemical and toxic events are triggered. Mechanism-specific dioxin bioassays utilise the AhR coupled induction of endogenous CYP1A proteins or reporter gene systems for detection of dioxin-like compounds and other AhR ligands. READ MORE