Sökning: "Chemostat"

Visar resultat 16 - 20 av 22 avhandlingar innehållade ordet Chemostat.

  1. 16. Analysis and Control of Continuous Microaerobic Ethanol Production by Yeast

    Författare :Carl Johan Franzén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nitrogen limitation; ethanol; Saccharomyces cerevisiae; glycerol; metabolic flux analysis; oxygen limitation; stoichiometric model; yeast physiology; RQ control;

    Sammanfattning : Glucose fermentation by Saccharomyces cerevisiae, and xylose fermentation by Candida utilis and Pichia stipitis, were investigated under microaerobic conditions. A dynamic experimental method named oxygen programmed fermentation (OPF), and a method for microaerobic RQ control in continuous culture have been developed. LÄS MER

  3. 17. On-line Monitoring Techniques for the Study of Yeast Physiology. Some Studies on the Yeasts Pichia stipitis and Saccharomyces cerevisiae

    Författare :Gunnar Lidén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : On-line monitoring techniques have been used with the goal of optimizing fermentation processes involving the yeasts Saccharomyces cerevisiae (Baker's yeast) and Pichia stipitis (a xylose fermenting yeast), and a highly equipped fermentor system has been developed for these studies. The fed-batch growth of S. LÄS MER

  4. 18. Engineering central carbon metabolism with phosphoketolase pathways in Saccharomyces cerevisiae

    Författare :John Hellgren; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; precursor supply; transcriptomics; sustainability; non-oxidative glycolysis; Carbon-conservation; metabolic engineering; platform strain; GATHCYC; proteomics;

    Sammanfattning : We need more efficient biocatalysts to make sustainable microbial production of chemicals and fuels more profitable before they can replace petroleum-based sources. Rewiring the metabolic pathways in the biocatalysts to avoid the loss of carbon as CO2 can aid in improving product yields and thereby the profitability of the process. LÄS MER

  5. 19. Investigation of a Biofilm Reactor Model with Suspended Biomass

    Författare :Alma Masic; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wall attachment; suspended growth; substrate removal; reactor; biofilm; CSTR; mathematical model; MBBR; nitrification; optimization;

    Sammanfattning : Biofilms are compact, sessile microbial communities that attach to surfaces in aqueous environments. In wastewater treatment, they are especially important for removal of phosphorus and nitrogen, which, if released into a receiving water body, can cause severe eutrophication. LÄS MER

  7. 20. Metabolic engineering and random mutagenesis for improved xylose utilisation of Saccharomyces cerevisiae

    Författare :Fredrik Wahlbom; Teknisk mikrobiologi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biokemisk teknik; Biochemical technology; mykologi; virologi; bacteriology; Microbiology; Kemiteknik och kemisk teknologi; Chemical technology and engineering; ethanol; Saccharomyces; xylose; virology; mycology; Mikrobiologi; bakteriologi;

    Sammanfattning : In this thesis I have summarised my work on the analysis and improvement of xylose utilisation by recombinant S. cerevisiae. A metabolic flux model was developed and used to analyse the intracellular fluxes in the recombinant xylose utilising S. cerevisiae TMB 3001 cultivated in chemostat at various dilution rates and xylose/glucose concentrations. LÄS MER