Search for dissertations about: "Solvent interaction"

Showing result 1 - 5 of 109 swedish dissertations containing the words Solvent interaction.

  2. 1. Enzyme substrate solvent interactions : a case study on serine hydrolases

    Author : Linda Fransson; Karl Hult; Jürgen Pleiss; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lipase; esterase; specificity; Bioengineering; Bioteknik;

    Abstract : Reaction rates and selectivities were measured for transacylation of fatty acid esters in solvents catalysed by Candida antarctica lipase B and by cutinase from Humicola insolens. With these enzymes classical water-based enzymology can be expanded to many different solvents allowing large variations in interaction energies between the enzymes, the substrates and the surrounding. READ MORE

  4. 2. The influence of solvent composition on crystal agglomeration of paracetamol

    Author : Eva Ålander; KTH; []
    Keywords : paracetamol; solvent composition; agglomeration; image analysis; principal component analysis; agglomerate strength; interfacial energy;

    Abstract : This thesis deals with the influence of solvent compositionon crystal agglomeration of paracetamol. Much work has beendone on characterisation of the crystalline product.Interfacial energies have also been determined for large singlegrown crystals. READ MORE

  5. 3. On the Solubility of Wood Hemicelluloses in Water and its Influence on the Adsorption at Cellulose/Water Interfaces

    Author : Saina Kishani; Lars Wågberg; Bernard Cathala; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wood; Hemicellulose; Solubility; Adsorption; Interaction; Cellulose; Size distribution;

    Abstract : Hemicelluloses are a group of natural polysaccharides and one of the main components of wood. The availability and biodegradability of these polymers have created a great interest in developing new bio-based materials or composites from these materials for different end-use purposes. READ MORE

  6. 4. New tools for sample preparation and instrumental analysis of dioxins in environmental samples

    Author : Lan Do; Peter Haglund; Staffan Lundstedt; Eric Reiner; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; PCDD Fs; dioxins; pressurized liquid extraction; PLE; selective SPLE; modular M-PLE; soil; sediment; sludge; gas chromatography; new stationary phases; multivariate data analysis; selectivity; interaction; Environmental Science; miljövetenskap;

    Abstract : Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), two groups of structurally related chlorinated aromatic hydrocarbons, are of high concern due to their global distribution and extreme toxicity. Since they occur at very low levels, their analysis is complex, challenging and hence there is a need for efficient, reliable and rapid alternative analytical methods. READ MORE

  7. 5. Theoretical Reflections of Solvation in Polar Media

    Author : Daniel Hagberg; Beräkningskemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; kvantkemi; Teoretisk kemi; quantum chemistry; Theoretical chemistry; Coordination; Water; Uranyl; Intermolecular forces; Simulation; Dielectric; Cluster; Hofmeister series; Ion; Interaction; Dipole;

    Abstract : Using experiments it is rather easy to measure things on the macroscopic length scale, while it is much harder to measure something in the microscopic world like molecular structure. The opposite is true in theoretical chemistry. READ MORE