Search for dissertations about: "carboxylic acids"

Showing result 1 - 5 of 104 swedish dissertations containing the words carboxylic acids.

  1. 1. Calcium Carbonate Precipitation in Presence of Carboxylic Acids

    Author : Karl-Johan Westin; KTH; []
    Keywords : calcium carbonate; precipitation; crystallization; carboxylic acids;

    Abstract : With a metal removal process based on precipitation aimed atthe purification of pulping effluent as a starting point, theinfluence of carboxylic acids on calcium carbonateprecipitation has been studied. The chosen carboxylic acids canact as more or less strong complexing agents for aqueouscalcium, just as many compounds found in pulping liquors. READ MORE

  2. 2. The initial atmospheric corrosion of copper and zinc induced by carboxylic acids : Quantitative in situ analysis and computer simulations

    Author : Harveth Gil; Christofer Leygraf; Johan Tidblad; Stuart Lyon; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Atmospheric corrosion; copper; zinc; carboxylic acids; modeling; GILDES; in situ; quantification;

    Abstract : Degradation of metals through atmospheric corrosion is a most important and costly phenomenon with significant effects on, e.g., the lifespan of industrial materials, the reliability of electronic components and military equipment, and the aesthetic appearance of our cultural heritage. READ MORE

  3. 3. Formation of carboxylic acids in rats and humans given indigestible carbohydrates Effects of monomeric composition, solubility, molecular weight and probiotics

    Author : Ulf Nilsson; Institutionen för livsmedelsteknik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Carboxylic acids; Short-chain fatty acids; Fructo-oligosaccharides; Prebiotics; Probiotics; Näringslära; Nutrition;

    Abstract : There is increasing evidence that fermentation in the large intestine is important for health, and that health-promoting effects are mediated by fermentation products such as butyric and propionic acid. As the formation of carboxylic acids (CAs) from various carbohydrates reaching the colon has been shown to vary, it is of great interest to identify food factors that could be of importance to this process. READ MORE

  4. 4. Quantitative in situ analysis of initial atmospheric corrosion of copper induced by carboxylic acids

    Author : Harveth Gil; Christofer Leygraf; Mark Rutland; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Atmospheric corrosion; carboxylic acids; copper; in situ; IRAS; QCM; coulometric reduction.; Chemistry; Kemi;

    Abstract : The interaction of carboxylic acids with copper is a phenomenon found both outdoors and, more commonly, indoors. The influence on copper of some carboxylic acids (formic, acetic, propionic, and butyric) have so far been studied at concentrations levels at least three or four orders of magnitude higher than actual indoor conditions (< 20 ppb, volume parts per billion), and with only limited emphasis on any mechanistic approach. READ MORE

  5. 5. Exploring Yeast as a Cell Factory for the Production of Carboxylic Acids and Derivatives

    Author : Diogo Portugal-Nunes; Teknisk mikrobiologi; []
    Keywords : Saccharomyces cerevisiae; Poly-3-D-hydroxybutyrate PHB ; Carboxylic acids; Alpha-ketoglutarate AKG ; Xylose assimilation; Weimberg pathway;

    Abstract : Baker’s yeast, Saccharomyces cerevisiae, is a promising cell factory for the sustainable utilization of renewable resources for the formation of products with commercial value. Among these, poly-3-D-hydroxybutyrate (PHB) is an extensively studied biopolymer naturally accumulated in some bacteria and archaea species through the formation of carbon granules. READ MORE