Sökning: "solvent replacement"

Visar resultat 11 - 15 av 16 avhandlingar innehållade orden solvent replacement.

  1. 11. Associative Polymer-Polymer and Polymer-Surfactant Systems: Phase Behaviour and the Influence of Chemical Reactions

    Författare :Salome Santos; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Aqueous mixtures of two non-ionic polymers, poly(acrylic acid) (PAA) and the amphiphilic triblock copolymer, (EO)27(PO)67(EO)27, known by its trade name Pluronic® P104, showed an associative phase separation (miscibility gap), which decreased with the decrease of PAA length. It was found that PAA is a much less selective “solvent” to P104 molecules than water. LÄS MER

  3. 12. On Thallium (III) and binuclear platinum-thallium complexes with N-donor ligands in solution and in solid

    Författare :Guibin Ma; KTH; []
    Nyckelord :thallium; platinum; cyanide; n-donor ligand; metal-metal bond multinuclear NMR; raman spectroscopy;

    Sammanfattning : This thesis describes the synthesis, structure, equilibriaand other properties of novel thallium(III) monomeric andplatinum-bonded complexes with nitrogen donor ligandsethylenediamine, diethylenetriamine, triethylenetetramine,porphyrin, 2,2'-bipyridine and 1,10-phenanthroline in solutionand in solid.The existence of three complexes withthe general formula[Tl(en)n]3+(n = 1-3) and their overall stability constantshave been established in pyridine. LÄS MER

  4. 13. Crystallographic studies on redox enzymes containing the thioredoxin fold

    Författare :Bin Ren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Three-dimensional structure; the thioredoxin fold; glutathione peroxidase; protein disulfide oxidoreductase; protein crystallography;

    Sammanfattning : Three-dimensional structures of two redox enzymes, glutathione peroxidase from human plasma and a protein disulfide oxidoreductase from the archaeon Pyrococcus furiosus, have been determined by X-ray crystallography. Glutathione peroxidases constitute a family of antioxidant seleno-enzymes that catalyze the reduction of a variety of hydroperoxides. LÄS MER

  5. 14. Risk factors for the development of chronic renal failure : epidemiological studies on the role of analgesic use, occupational exposures and socioeconomic background

    Författare :Michael Fored; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Kidney failure; chronic; Analgesics; non-narcotic; Case-control study; Risk factors; Acetaminophen; Paracetamol; Aspirin; Acetylsalicylic acid; Bias epidemiology ; Education; Socioeconomic factors; occupations; Occupational exposure; Solvents; Metals; heavy; Silicon compounds; Dust.;

    Sammanfattning : Chronic renal failure is a severe condition that reduces life expectancy and typically progresses to end-stage renal disease and a need for renal replacement therapy. In a large proportion of cases, chronic renal failure evolves from known renal or systemic diseases, but in some cases the pathogenesis remains unknown. LÄS MER

  7. 15. Potential of Organosolv Lignin Nanoparticles as a Sustainable Flotation Reagent : Towards a Low-Carbon Footprint Mining Industry

    Författare :Katerina Hruzova; Ulrika Rova; Saija Luukkanen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organosolv lignin particles; Nanoparticles; Flotation reagent; Copper recovery; Biokemisk processteknik; Biochemical Process Engineering;

    Sammanfattning : The green transition is driving a steep increase in the demand for minerals, which has put the focus on more responsible and sustainable mining practices as there is a growing pressure on mining operations to minimise their environmental footprint, mitigate risks in neighbouring communities, and decrease the consumption of natural resources. In 2022, mineral froth flotation was used to recover 18 million tonnes of copper from copper ore, accounting for 80% of total copper mine output. LÄS MER