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Visar resultat 1 - 5 av 88 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Adsorption of Metallic Ions onto Chitosan : Equilibrium and Kinetic Studies

    Författare :Martha Benavente; Joaquín Martínez; Olle Wahlberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adsorption; biosorption; chitin; heavy metals; isotherm; kinetic models; mining; speciation; water treatment; Chemical engineering; Kemiteknik;

    Sammanfattning : Equilibrium isotherms and the adsorption kinetics of heavy metals onto chitosan were studied experimentally. Chitosan, a biopolymer produced from crustacean shells, has applications in various areas, particularly in drinking water and wastewater treatment due to its ability to remove metallic ions from solutions. LÄS MER

  3. 2. Microstructure and Gelation Behaviour of High Methoxyl and Low Methoxyl Pectin Gels and their Mixtures

    Författare :Caroline E E Löfgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; rheology; kinetic behaviour; LM pectin; transmission electron microscopy; calcium; microstructure; gel formation; sucrose; HM pectin; pectin mixtures;

    Sammanfattning : The objective of this thesis was to explore the functional behaviour of high methoxyl (HM), low methoxyl (LM) and mixed HM/LM pectin gels of different chemical characteristics with emphasis on microstructure and kinetic rheological behaviour. The rheological properties and the structure of pectin gel networks were investigated for pectins under different sucrose, calcium and pH conditions by the means of oscillatory measurements and transmission electron microscopy (TEM). LÄS MER

  4. 3. Rate Limiting Factors For Protein Folding

    Författare :Maria Berggård Silow; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kinetic competition; transient aggregation; diffusion control; reconfiguration time; collapse; osmolytes; broad barriers; Hammond behaviour; two-state; U1A; CI2; Proteins; enzymology; Proteiner; enzymologi;

    Sammanfattning : Abstract. This thesis describes factors that are rate limiting for the folding of two small proteins, U1A and CI2 which fold without accumulating intermediates. The [GdnHCl] dependencies of the unfolding- and refolding kinetics of U1A display downward curvatures. LÄS MER

  5. 4. Pharmaceutical cocrystals : formation mechanisms, solubility behaviour and solid-state properties

    Författare :Amjad Alhalaweh; Peter York; Luleå tekniska universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; crystal engineering; cocrystal; formation; solubility; pH; dissolution; surface properties; solid-state properties; Health Science; Hälsovetenskap;

    Sammanfattning : The primary aim of pharmaceutical materials engineering is the successful formulation and process development of pharmaceutical products. The diversity of solid forms available offers attractive opportunities for tailoring material properties. LÄS MER

  7. 5. Fluid Dynamics of a Wurster-type Fluidized Bed - A Numerical and Experimental Study

    Författare :Anna Magnusson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; optical probe; frictional stress; fluidized bed; Wurster bed; kinetic theory;

    Sammanfattning : The fluid dynamics of a Wurster bed, a fluidized bed used in the pharmaceutical industry for the coating of small particles or pellets, is investigated numerically and experimentally. The main objective of the thesis is to obtain greater knowledge of the flow properties in the Wurster bed. LÄS MER