Sökning: "PCBs"

Visar resultat 36 - 40 av 116 avhandlingar innehållade ordet PCBs.

  1. 36. Effects of Lightning Electromagnetic Pulse and High Power Microwaves on Military Electric Systems

    Författare :Stefan Silfverskiöld; Michel Ianoz; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; LEMP; HPM; electronic warfare; anechoic chamber; reverberation chamber; Teknisk fysik; Engineering physics; Teknisk fysik; Electricity; Esp The Study Of Transients and Discharges; elektricitetslära; ssk studiet av transienter och urladdning;

    Sammanfattning : The awareness of the threat posed by Lightning Electromagnetic Pulse (LEMP) and High Power Microwaves (HPM) against the operational reliability of electric systems is rapidly growing. This has led to an increasing need for reliable tools, experimental as well as theoretical, for design, analysis and verification of system immunity against electromagnetic threats. LÄS MER

  3. 37. Atmospheric transport of persistent organic pollutants to aquatic ecosystems

    Författare :Cecilia Agrell; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Temperature; Latitude; Deposition; PCB; Baltic Sea; Ekologi;

    Sammanfattning : The load of persistent organic pollutants (POPs) is considered high in the Baltic ecosystem. The Baltic Sea spans over 12 latitudes and the regional differences in climate affect the behavior of POPs. LÄS MER

  4. 38. Effects of some Endocrine Disruptors on Human and Grey Seal Uterine Cells

    Författare :Carolina Bredhult; Matts Olovsson; Britt-Marie Bäcklin; Olle Söder; Uppsala universitet; []
    Nyckelord :Obstetrics and gynaecology; Reproductive toxicology; Baltic grey seal; leiomyoma; myometrial cells; endometrial endothelial cells; hormones; endocrine disruptors; Obstetrik och kvinnosjukdomar;

    Sammanfattning : The effects of environmental contaminants in humans and animals are of great concern. Some contaminants are endocrine disruptors that may interfere with the endogenous hormonal signalling and disturb, for example, reproductive organs and functions. LÄS MER

  5. 39. Enantiospecific Analysis and Environmental Behavior of Chiral Persistent Organic Pollutants (POPs)

    Författare :Karin Wiberg; Umeå universitet; []
    Nyckelord :;

    Sammanfattning : Many persistent organic pollutants (POPs) are chiral. These pollutants are generally released into the environment as racemates, but frequently undergo alterations in enantiomeric composition as soon as they are subjected to life chemistry processes. LÄS MER

  7. 40. Long-term changes of mercury, lead and persistent organic pollutants in arctic environments

    Författare :Carola Lindeberg; Ingemar Renberg; Mats Tysklind; Ove Emteryd; Edvard Karlsson; Per Jonsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lake sediment; time trends; chlordane; hexachlorobenzene; mercury; lead; soil; climate changes; Arctic; Greenland; Sweden; Swedish mountains; PCB; PBDE; pesticides; Earth sciences; Geovetenskap;

    Sammanfattning : The Arctic represents a huge area with poor infrastructure contributing to limited possibilities to establish monitoring and research programs. From the investigations that have been performed we know that the arctic environment is affected by anthropogenic emissions from lower latitudes, but knowledge about underlying transport processes, the arctic pollution extent and the rates of changes are limited. LÄS MER