Abstract:
Methods of redirecting carbon flux and increasing C2/C3 or a C4/5/6 carbon chain length carbon-based chemical product yield in an organism, nonnaturally occurring organisms with redirected carbon flux and increased C2/C3 or C4/5/6 carbon chain length carbon-based chemical product yield and methods for using these organisms in production of C2/C3 or C4/5/6 carbon chain length carbon-based chemical products are provided.
Abstract:
La présente invention concerne une souche mutante de levure dans laquelle au moins l'expression ou l'activité de la 2-méthylcitrate déshydratase est inhibée, et l'utilisation de cette souche pour la production de lipides et d'acide citrique.
Abstract:
According to present invention, the lactic acid and other organic acids can be produced in a simple and inexpensive manner, so as to eliminate the disadvantages of the prior processes discussed above. It has been surprisingly found, that if to create such conditions at which growth rate of cells is minimal but sufficient for replacement cells death, in this case decrease of the specific consumption of carbohydrates per unit of lactate is take place. The growth rate of cells can be reduced by increase of temperature and decrease of pH up to critical and supercritical values for each microorganism and as well by decrease of amounts nutrients fed into the fermentor and by use of additives bacteriostatics. Preferably, the optimal growth rate of cells reach by combination of temperature, pH, by amount of used nutrients and bacteriostatics fed into the fermentor.
Abstract:
The present invention relates to newly identified genes that encode proteins that are involved in the (bio)synthesis of citric acid. The invention also features polynucleotides comprising the full-length polynucleotide sequences of the novel genes and fragments thereof, the novel polypeptides encoded by the polynucleotides and fragments thereof, as well as their functional equivalents. The present invention also relates to the use of said polynucleotides and polypeptides as biotechnological tools in the production of citric acid from microorganisms, whereby a modification of said polynucleotides and/or encoded polypeptides has a direct or indirect impact on yield, production, and/or efficiency of production of the fermentation product in said microorganism. Also included are methods/processes of using the polynucleotides and modified polynucleotide sequences to transform host microorganisms. The invention also relates to genetically engineered microorganisms and their use for production of citric acid.
Abstract:
The present invention relates to a general method of enzymatic synthesis of isotopically labeled carbohydrates, sugars and nucleosides. Labeled citric acid cycle intermediates, amino acids and ribose mononucleotides may be rapidly and conveniently synthesized from labeled pyruvate, lactate or L-alanine. The method employs a novel nicotinamide dinucleotide regeneration system which permits use of low NADH levels. The method may be manipulated to allow labeling at a variety of carbon/hydrogen sites.
Abstract:
Um ein Verfahren zur biotechnologischen Herstellung von Carbonsäuren, bei der die säurebildenden Mikroorganismen unsterilin einer Abwässer enthaltenden submersen Phase mit und aller für die Herstellung der Carbonsäuren erforderlichen Kohlenstoff-und Nährmedienkomponenten kultviert werden, bereitzustellen, das die Nachteile bekannter Verfahren vermeidet und das eine hohe Produktkonzentrationen und Produktivitäten bei gleichzeitiger Schonung der Ressourcen Wasser und Energie ermöglicht, wird vorgeschlagen, dass Mikroorganismen, die unter unsterilen Bedingungen in einem Kultivierungsmedium, welches Abwasser enthält, unter Zugabe von kohlenstoffreichen Verbindungen kultiviert werden, eingesetzt werden.
Abstract:
The present invention relates to methods for improving fermentation processes, including increasing product yield, reduced viscosity, and/or reduced foaming.
Abstract:
The invention relates to a method and an apparatus for manufacturing a hydroxycarboxylic acid product from lignocellulose-based raw material. According to the invention,a first effluent (2) used as a raw material is concentrated to provide a concentrate (3), the concentrate (3) is treated by a hydrolysis (11) to form saccharides (4), the saccharides (4) are fermented (12) to form hydroxycarboxylic acid, and the pH of the fermentation (12) is controlled by using a second effluent (16), for forming a hydroxycarboxylic acid product. Further, the invention relates to use of a bleaching filtrate.
Abstract:
This invention provide processes for producing carboxylic acid product, along with useful salts. The carboxylic acid product that is produced according to this invention is preferably a C 2 -C 12 carboxylic acid. Among the salts produced in the process of the invention are ammonium salts.