Search for dissertations about: "air contamination"

Showing result 1 - 5 of 58 swedish dissertations containing the words air contamination.

  2. 1. Some Aspects on Contamination Control in Hospitals- Observations and Measurements

    Author : Catinka Ullmann; Chalmers tekniska högskola; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Source strength; Tissue and cells establishments; Ultraclean air operating rooms; Microbial cleanliness; Autoclaves; Contamination control; Door openings; Airborne contamination risks;

    Abstract : Measurements of the cleanliness level have been performed in operating rooms classified as tissue and cells establishments for bone tissue to compare the results with the requirements given in the Tissue and Cells Directives of the European Union (EUTCD). The results show that the requirements are not always fulfilled. READ MORE

  4. 2. Analysis of quality characteristics of radiotherapeutic photon beams

    Author : Bo Nilsson; Stockholms universitet; []
    Keywords : Photon therapy; lepton contamination; photon contamination; surface dose; perturbation effects;

    Abstract : The lepton and photon contamination of high energy photon beams for radiation therapy has been investigated computationally and experimentally. The contaminating particles will effect the quality of the beam by increasing the surface dose, degrading the uniformity of the beam, broadening the penumbra, and increasing the energy imparted outside the useful beam. READ MORE

  5. 3. Safety and biological aspects of present techniques of haemodialysis

    Author : Per Jonsson; Hans Dietrich Polaschegg; Umeå universitet; []
    Keywords : haemodialysis; safety; leakage current; central dialysis catheter; microbubbles; microemboli; air contamination; transfusion medicine; transfusionsmedicin;

    Abstract : Introduction: Haemodialysis (HD) is a treatment in which blood from the patient is lead through a tubing system into a dialysis device in a extracorporeal circuit. This circuit contains semipermeable membranes (dialyzer). Blood with uraemic toxins flows on one side, and a salt solution flows on the other side. READ MORE

  6. 4. Occurrence and fate of emerging and legacy flame retardants : from indoor environments to remote areas

    Author : Seth Newton; Cynthia de Wit; Ulla Sellström; Matthew MacLeod; Roland Kallenborn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Flame retardant; emerging; legacy; polybrominated diphenyl ethers; PBDE; HBCDD; long range transport; dust; air; soil; atmospheric deposition; Applied Environmental Science; tillämpad miljövetenskap;

    Abstract : Persistent organic pollutants (POPs) are toxic chemicals that can be found in various matrices in all corners of the planet, including remote areas such as the Arctic.  Several POPs are known and monitored but given the abundance of new chemicals in commerce about which little is known, chemicals that may be new POPs are constantly being screened for. READ MORE

  7. 5. Polychlorinated biphenyls (PCB) in a river ecosystem

    Author : Gudrun Bremle; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hydrobiology; dredging; landfill; cleanup; remedial action; air; fish; sediment; Persistent organic pollutants; freshwater; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Abstract : Atmospheric deposition is one source of persistent pollutants such as polychlorinated biphenyls (PCB) in aquatic environments. Other point sources can also contribute to the PCB loadings in the water. READ MORE