Sökning: "pKa values"

Visar resultat 21 - 25 av 28 avhandlingar innehållade orden pKa values.

1. 21. Use of Switchable Carbamate Surfactants for Design of Reversible Colouring of Cotton

   Författare :Anna-Karin Hellström; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; cotton; pigment; textile colouring; de-colouring; switchable surfactant; carbamate;

   Sammanfattning : Circularity of materials is a global need. However, recycling of cotton often requires many steps involving chemical or mechanical treatments. According to the waste hierarchy, reuse is a more environmentally benign approach than recycling, giving extended lifecycles with only limited processing of materials. LÄS MER

3. 22. On the Local Filtration Properties of LignoBoost lignin: Studies of the influence of xylan and ionic strength

   Författare :Julie Durruty; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acid precipitation.; LignoBoost process; compressible filter cake; particle interactions; xylan; softwood lignin; constitutive relationships; local filtration properties; dead-end filtration;

   Sammanfattning : Kraft pulping technology is currently the most commonly-used method for producing paper pulp from wood. A new and promising opportunity for Kraft pulp mills is to take a step towards becoming biorefineries by implementing technologies able to extract and convert the organic by-products, such as lignin, into a wide range of value-added products and chemicals. LÄS MER

4. 23. Structure-function studies of glutaredoxins and related oxidoreductases

   Författare :Tobias Elgán; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Thiol-disulfide oxidoreductase; thioredoxin; Trx; glutaredoxin; Grx; protein disulfide oxidoreductase; PDO; -C-X-X-C-; specificity; conformational stability; ligandinduced stability; CD spectroscopy; redox potential;

   Sammanfattning : The members of the ubiquitous group of thiol-disulfide oxidoreductases are characterized by a conserved tertiary structure, the thioredoxin (Trx) fold, and by having a consensus -C-X-X-C- active site sequence motif. By utilizing the active site cysteines, these proteins participate in redox reactions by catalyzing reversible disulfide oxidation and reduction. LÄS MER

5. 24. Characterization of aluminum in environmental systems using X-ray absorption and vibrational spectroscopy : The importance of organic matter

   Författare :Kristoffer Hagvall; Torbjörn Karlsson; Per Persson; Lars Lövgren; Dan Berggren Kleja; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The fate and behavior of many metals in the environment are highly dependent on interactions with natural organic matter (NOM), which is abundant in most soils and surface waters. The complexation with NOM can influence the speciation of the metals by affecting their hydrolysis and solubility. LÄS MER

7. 25. Structural and functional studies on glutaredoxins and members of the thioredoxin superfamily

   Författare :Johan Sagemark; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The active site of E.coli glutaredoxin 3 was investigated using a combination of experimental and theoretical techniques. Starting from different conformations, molecular dynamics simulations converged to an active site conformation where the Cys11 thiolate was hydrogen bonded to surrounding amide protons and to the thiol proton of Cys14. LÄS MER