Sökning: "kolloider"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet kolloider.

  1. 1. Stability and sorption capacity of montmorillonite colloids : Investigation of size fractional differences and effects of γ-irradiation

    Författare :Karin Norrfors; Susanna Wold; Daniel Kaplan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; montmorillonite; colloids; size effect; γ-irradiation; sorption; colloid stability; radionuclides; montmorillonit; kolloider; storlekseffekt; γ-bestrålning; sorption; kollodial stabilitet; radionuklider; Kemi; Chemistry;

    Sammanfattning : Bentonite clay is intended to form one of the barriers in most repositories of spent nuclear fuel located in granite. One important function of the bentonite barrier is to retard transport of radionuclides in the event of waste canister failure. Bentonite has a high sorption capacity of cations and its main constituent is montmorillonite. LÄS MER

  3. 2. Synthesising colloidal molecules with tunable interactions from soft responsive microgel particles

    Författare :Linda Månsson; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; microgels; polymers; colloids; colloidal synthesis; self-assembly; material scaince; confocal microscopy; light scattering; microgels; polymers; colloids; colloidal synthesis; self-assembly; material science; confocal microscopy; light scattering;

    Sammanfattning : Colloidal self-assembly is an attractive bottom-up approach to new superstructures and materials with new properties. However, the typical spherical shape and isotropic interaction potential limit the repertoire of ordered structures that can be obtained from synthetic colloids. LÄS MER

  4. 3. Fate of riverine iron over estuarine salinity gradients

    Författare :Simon Herzog; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; iron Fe ; Organic matter; boreal rivers; XAS; DLS; Fe isotope;

    Sammanfattning : Rivers have traditionally not been considered important sources of bioavailable iron (Fe) to the marine waters, since most Fe is lost by salinity-induced aggregation and sedimentation during estuarine mixing. However, recent studies from boreal rivers found a remarkably high Fe stability, probably due to the interaction with organic matter. LÄS MER

  5. 4. Weathering and water quality in an area with mineralized till, Liikavaara, northern Sweden

    Författare :Jonas Thunberg; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : Avhandlingen består av tre artiklar som behandlar olika aspekter på vittring och vattenkvalitet i området vid kopparfyndigheten Liikavaara Östra i norra Norrbotten. Moränen i området har naturligt förhöjda metallhalter, särskilt av koppar, och i lic-avhandlingen redovisas med olika metoder att naturligt vittring i detta område kan leda till förhöjda metallhalter i lokalt grundvatten i jämförelse med ett referensområde med låga metallhalter i moränen. LÄS MER

  7. 5. Transvascular exchange and organ perfusion with reference to colloid and hypertonic solutions, and to endotoxaemia

    Författare :Staffan Holbeck; Anestesiologi och intensivvård; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sepsis; mannitol; microdialysis; intestine; hypertonic saline; gut; hydroxyethyl starch; gelatin; endotoxin; fluid therapy; dextran; albumin; capillary filtration coefficient; intensivvård; Anestesiologi; urea; Anaesthesiology; intensive care; SIRS; reflection coefficient;

    Sammanfattning : Changes in vascular permeability can immensely change plasma volume and affect the degree of oedema in the body. In diseases with an increased vascular permeability, adequate fluid therapy is of considerable importance to prevent hypovolaemia. LÄS MER