Sökning: "sealing system"

Visar resultat 11 - 15 av 38 avhandlingar innehållade orden sealing system.

  1. 11. Dermal exposure to pesticides in Nicaragua : a qualitative and quantitative approach

    Författare :Aurora Aragón; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Dermal exposure; developing country; pesticides; subsistence farmers; fluorescent tracer; visual scoring system; skin wipes; pesticide residues.;

    Sammanfattning : Background: Pesticide use continues to be a serious public health problem in developing countries, despite decades of safe pesticide use strategies. In Nicaragua, organophosphate insecticides, in particular chlorpyrifos and methamidophos are responsible for about half of the acute pesticide poisonings. LÄS MER

  3. 12. Grease lubrication mechanisms in bearing seals

    Författare :Pieter Baart; Richard F. Salant; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Rolling bearings contain seals to keep lubricant inside and contaminants outside the bearing system. These systems are often lubricated with grease; the grease acts as a lubricant for the bearing and seal and improves the sealing efficiency. In this thesis, the influence of lubricating grease on bearing seal performance is studied. LÄS MER

  4. 13. Rock mass response during high pressure grouting

    Författare :Rikard Gothäll; Håkan Stille; Johan Andersson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building engineering; Byggnadsteknik;

    Sammanfattning : The sealing of hard jointed rock by grouting involves several complicated mechanical systems. The result is a complex coupled system of hydro- logical and mechanical precesses. In order to determine the higher order effects of the resulting system the fracture deformations must be assessed. LÄS MER

  5. 14. µPIV Measurement of Grease Velocity Profiles

    Författare :Jinxia Li; Henrik Åström; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Lubricating grease is commonly applied to lubricate e.g. rolling bearings, seals and gears. Grease has some clear advantages over lubricating oil. LÄS MER

  7. 15. MEMS Interfaces for Bioanalysis Systems

    Författare :Thomas Frisk; Göran Stemme; Andreas Hierlemann; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microfluidic interfacing; microfluidics; µTAS; sample transfer; biosensor; electronic nose; surface tension; quartz crystal microbalance; QCM; narcotics detection; Electronic measurement and instrumentation; Elektronisk mät- och apparatteknik;

    Sammanfattning : This thesis deals with various aspects of using open microfluidic interfaces. Three specific areas of application are studied. The first is air-to-liquid interfacing in biosensors with possibilities for component inte­gration. A micromachined interface for airborne sample-to-liquid and droplet-to-liquid adsorption is discussed. LÄS MER