Sökning: "diffusion"

Visar resultat 21 - 25 av 1637 avhandlingar innehållade ordet diffusion.

  1. 21. Studies of ionic diffusion in crystalline rock

    Detta är en avhandling från Stockholm : Kemiteknik

    Författare :Yvonne Ohlsson; KTH.; [2001]
    Nyckelord :matrix diffusion; surface diffusion; surface conductivity; nuclear waste; rock; mineral; electrical conductivity;

    Sammanfattning : .... LÄS MER

  2. 22. Modeling of Hindered Diffusion in Gels

    Detta är en avhandling från Department of Chemical Engineering, Lund University

    Författare :Jan Gutenwik; Lund University.; Lunds universitet.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; effective diffusion coefficient; pore size distribution; obstruction; immobilization; modeling; adsorption kinetics; hindered diffusion; simulation program; proteins; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : Hindered diffusion occurs in the most different processes, as has been described in this thesis. It is very important to have an understanding of the influence of hindered diffusion on the mass transfer rate, especially when competing rate processes are acting simultaneously. LÄS MER

  3. 23. Diffusion studies in gels using holographic laser interferometry

    Detta är en avhandling från Chemical Engineering 1, Lund University

    Författare :Charlotte Mattisson; Lund University.; Lunds universitet.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemical potential; ionic strenght; pH; cubic phase; partition coefficient; holographic laser interferometry; holography; pullulan; lysozyme; BSA; macromolecules; diffusion; gel; Poisson-Boltzmann; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : This thesis is an investigation of the potential of holographic laser interferometry for the study of diffusion of both small solutes and macromolecules. An investigation on the importance of errors due to light deflection in refarctive index gradients showed that the magnitude of the refractive index gradients were negligible for the system investigated. LÄS MER

  4. 24. NMR Self-Diffusion Studies and Stability Studies of Emulsions

    Detta är en avhandling från Maj-Lis Larsson, Physical Chemistry 1, Center for Chemistry and Chemical Engineering, P.O. Box 124, S-22100 Lund, Sweden

    Författare :Ingrid Lönnqvist; Lund University.; Lunds universitet.; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coalescence; emulsion stability; size distribution; restricted diffusion; self-diffusion coefficient; self-diffusion PGSE NMR; surfactant; emulsifier; continuous phase; microemulsion; phase diagram; emulsion; multiple emulsion; cream; conductivity; Physics; Fysik; Chemistry; Kemi;

    Sammanfattning : The aim of this study is to characterize emulsion systems by self-diffusion PGSE NMR methods. The specifics of the emulsions studied are all taken from the literature and they are of the W/O or O/W type stabilized with different emulsifiers. LÄS MER

  5. 25. Diffusion of large molecules in steam-exploded wood

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Patric Kvist; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Large Molecules; FRAP; LBM; Wood; Diffusion; Steam Explosion;

    Sammanfattning : The diffusion of large molecules in wood pre-treated with steam explosion is important to understand in the context of the materials biorefinery. Steam explosion is a pretreatment method used to both open up the internal structure of wood and increase the accessibility of the cell walls of the wood with the use of high-pressure steam, and it is considered an energy-efficient method. LÄS MER