Search for dissertations about: "carboxylic acid"

Showing result 11 - 15 of 139 swedish dissertations containing the words carboxylic acid.

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

   Author : Harveth Gil; Christofer Leygraf; Mark Rutland; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; 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

4. 12. 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

5. 13. Engineering short-chain carboxylic-acid metabolism in the model microorganism Escherichia coli

   Author : Gustav Sjöberg; Antonius J. A. van Maris; Solange Mussatto; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metabolic engineering; R -3-hydroxybutyrate; volatile fatty acids; bioprocess design; Escherichia coli; bacterial artificial chromosome; Bioteknologi; Biotechnology;

   Abstract : The ever-increasing concern about carbon dioxide emissions has created an urgent need to develop alternative methods to cheaply and renewably produce materials, chemicals and fuels. The biorefinery is uniquely suited to deliver these products from sustainable biomass. READ MORE

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

   Author : Ulf Nilsson; Avdelningen för livsmedel och läkemedel; []
   Keywords : 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

7. 15. Multidimensional engineering for the production of fatty acid derivatives in Saccharomyces cerevisiae

   Author : Yating Hu; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; protein engineering; Saccharomyces cerevisiae; fatty acid derivatives; metabolic engineering; tolerance; transporter;

   Abstract : Saccharomyces cerevisiae , also known as budding yeast, has been important for human society since ancient time due to its use during bread making and beer brewing, but it has also made important contribution to scientific studies as model eukaryote. The ease of genetic modification and the robustness and tolerance towards harsh conditions have established yeast as one of the most popular chassis in industrial-scale production of various compounds. READ MORE