Sökning: "toxic substances"

Visar resultat 6 - 10 av 130 avhandlingar innehållade orden toxic substances.

  1. 6. Dietary fatty acids increase the absorption of toxic substances and drugs by modifying different absorption pathways in the intestinal epithelium

    Författare :Bitte Aspenström-Fagerlund; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Dietary fatty acids have surface active properties comparable to substances used as absorption enhancers of poorly absorbed drugs. The intestinal epithelium serves as a gatekeeping barrier for the absorption of toxic substances, nutrients and drugs. LÄS MER

  3. 7. Studies to Avoid Decreased Efficiency in Multiple Stage Biological Wastewater Treatment Plants: Concerning Forests Industry Effluents

    Författare :Maria Sandberg; Ola Holby; Erik Särner; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wastewater treatment; Forest industry; Black liquor; MultiBio; Toxic effluents; Environmental engineering; Miljöteknik; Miljö- och energisystem; Environmental and Energy Systems;

    Sammanfattning : Målet med den här studien är att förhindra effektivitetssänkningar i moderna biologiska reningsanläggningar för skogsindustriella avloppsvatten. Biologiska processer är vanligtvis effektiva när det gäller att reducera lättnedbrytbart organiskt material. Eftersom den utgörs av levande mikroorganismer (MO) är tekniken känslig. LÄS MER

  4. 8. Ecotoxicological assessment by microcosm tests on plankton communities

    Författare :Pardis Pirzadeh; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; limnologi; Marinbiologi; aquatic ecology; limnology; Ecology; Ekologi; Hydrobiology; marine biology; musk substances; brominated flame retardants; structural effects; akvatisk ekologi; Environmental chemistry; Miljökemi; mesocosm;

    Sammanfattning : The aim of this thesis is to present a short-term plankton community toxicity test in laboratory microcosms, with which the effect of the test substance on species abundance and composition of the community is evaluated. This laboratory microcosm is an intermediate between single-species tests and outdoor mesocosm tests. LÄS MER

  5. 9. Waterborne pollution from mining in cold climates : Potential catchment-scale immobilization of substances by microbial sulfate reduction (MSR)

    Författare :Sandra Fischer; Jerker Jarsjö; Gunhild Rosqvist; Carl-Magnus Mörth; Anna-Kaisa Ronkanen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic; abandoned mines; metal pollution; sulfur isotopes; bacterial sulfate reduction BSR ; nature-based solution NBS ; naturgeografi; Physical Geography;

    Sammanfattning : Waterborne pollution from mining is impacting groundwater and surface water resources in many regions of the world. Main problems include acidification and high levels of dissolved toxic metals that adversely affect humans and ecosystems. LÄS MER

  7. 10. Tissue distribution studies and risk assessment of perfluoroalkylated and polyfluoroalkylated substances (PFASs)

    Författare :Daniel Borg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Perfluoroalkylated and polyfluoroalkylated substances (PFASs) represent a large class of man-made chemicals. These substances have emerged as environmental contaminants due to their extraordinary resistance to degradation, potential for bioaccumulation, toxicity and a global presence in humans, wildlife and the environment. LÄS MER