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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"organic acid"”.
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Polymeric Chemisorbents for Organic Acid Recovery from Aqueous Solution
The high cost of recovering succinic acid (SA) from fermentation media during bioproduction makes it difficult for bioproduced SA to compete with petrochemically-derived SA. Two new polymeric sorbents and multiple recovery methods that have the potential to reduce bioproduction costs are examined. …
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Application of organic acid functionalized cellulose for batch and aqueous two-phase extraction of sulfonamides from different matrices
… applications in both medicinal and synthetic organic chemistry. While these substances are effective in their intended uses, their negative environmental impact raises serious concerns. Sulfonamides can have toxic effects on aquatic ecosystems, leading to the disruption of microbial …
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Elucidation of weak organic acid resistance mechanisms in non-Saccharomyces yeast: a case study of Zygosaccharomyces parabailii and Kluyveromyces marxianus
… products, including bulk chemicals such as organic acids. However, efficient and economically viable production of organic acids has to face problems related to low productivity/titer and toxicity of the final product. Therefore, the exploration of yeast biodiversity to exploit unique native …
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Isolating genes for a quantitative trait: A case study involving total and soluble solids in tomatoes
… paste. Fresh market tomatoes with high sugar and organic acid content are preferred by consumers.
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Profiling of urinary metabolites in human pregnancy
Maternal urinary metabolites (organic acids and steroids) in human pregnancy were profiled by gas-chromatographic methods. Urine specimens were collected from pregnant women at two time intervals in gestation (12½-15½ weeks and 24½-27½ weeks). A group of nonpregnant women was also investigated. The …
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ΣΥΝΘΕΣΗ, ΔΟΜΗ ΚΑΙ ΤΕΧΝΟΛΟΓΙΚΗ ΕΦΑΡΜΟΓΗ ΝΕΩΝ ΜΙΚΤΩΝ ΣΥΜΠΛΟΚΩΝ ΒΟΡΙΟΥ ΜΕ Β-ΔΙΚΕΤΟΝΕΣ ΚΑΙ ΟΡΓΑΝΙΚΑ ΔΙΚΑΡΒΟΝΙΚΑ ΟΞΕΑ Η ΥΔΡΟΞΕΑ
… THREE NEW BORON COMPLEXES WITH B-DIKETONES AND ORGANIC HYDROXYACIDS AND SIXTEEN NEW BORON COMPLEXES WITH B-DIKETONES AND ORGANIC DICARBOXYLIC ACIDS WERE PREPARED. THEIR STRUCTURE WAS DEFINED WITH ANALYTICAL, SPECTROSCOPIC AND X-RAY METHODS. IT WAS CONFIRMED THAT THE BORON ATOM IS CONJUCTED …
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Recovery of rare earth elements (REE) from waste printed circuit boards (WPCBs) through heterotrophic bioleaching
… which included the analysis of microbial organic acid production. The study explored the kinetics aspect of the bioleaching process, examining both biotic and abiotic settings to identify distinctions between these approaches and provide an understanding of the microbial mechanisms driving …
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Synthesis of Higher Molecular Weight Poly(D-glucaramides) and Poly(aldaramides) as Novel Gel Forming Agents
… form ion exchange resin to give D-glucaric acid, which was then reacted with a diamine. The glucarate portion of the salt was activated for polymerization through esterification in HCl/methanol. Polymerization was initiated by basification of the resulting mixture. The molecular weights of …
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Synthesis of Higher Molecular Weight Poly(D-glucaramides) and Poly(aldaramides) as Novel Gel Forming Agents
… form ion exchange resin to give D-glucaric acid, which was then reacted with a diamine. The glucarate portion of the salt was activated for polymerization through esterification in HCl/methanol. Polymerization was initiated by basification of the resulting mixture. The molecular weights of …
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Pyruvate Cycling Pathways and Glucose-Stimulated Insulin Secretion in Pancreatic Beta Cells
… secretion (GSIS), pyruvate cycling, and NADPH. Organic acid profiling revealed that decreased pyruvate cycling was compensated by an increase in lactate and stable pyruvate levels. This work established an important role for ICDc in maintaining GSIS through pyruvate-isocitrate cycling. MEc …
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Antibacterial Activity of Hydrogen Peroxide Against Escherichia Coli O157:H7 and Salmonella Spp. in Fruit Juices, Both Alone and in Combination With Organic Acids
… with ~ 6.4 log CFU/ml of a five strain, acid adapted, nalidixic acid resistant E. coli O157:H7 cocktail. Orange juice was inoculated with a comparable Salmonella spp. cocktail. In the first study, 0.017% and 0.012% H₂O₂ was added in combination with 0.1% and 0.3% of the dominant organic …
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Poultry Performance and Food Safety Impacts of Selected Organic Acids and Probiotics
… was conducted to evaluate the use of selected organic acids in controlling foodborne pathogens and improving poultry performance. Then, the characterization and application of lactic acid bacteria and <em>Bacillus</em> spp. based probiotics in poultry, and their combination, along with early …
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Regional dolomitization of Early Ordovician, Upper Knox Group, Appalachians
… dissolution event attributed to migration of organic acid-rich fluids through the Knox carbonates. Regional dolomitization occurred coeval with Late Paleozoic deformation and was closely associated with MVT mineralization and hydrocarbon migration. The δ¹⁸O values and trace element contents of …
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Recovery of copper from low-grade ores by Aspergillus niger
… good potential in generating varieties of organic acids effective for metal solubilization. Organic acid effectiveness was enhanced when sulphuric acid was added to the medium. Different agricultural wastes were evaluated and the maximum solubilization of 68%, 46% and 34% was achieved for …
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Novel Separation Methods using Electrodialysis/Electrodeionization for Product Recovery and Power Generation
… focused on the development of high purity organic acids purification with low power requirements. Work resulted in the development of a new type of electrodialysis process, specifically the use of ionic liquids as a secondary solvent for the development of dual solvent electrodialysis. …
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Characterizing uronate dehydrogenase from P. syringae as a step towards expressing a retro-biosynthetically derived glucaric acid pathway in E. coli
… group specificity and reactivity of enzymes) and organic chemistry. Using this method, several novel pathways have been designed in this laboratory for the microbial production of glucaric acid. In addition to design, efforts have been made in order to express these pathways inside E. col. For the …
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Binding, activation, and transformation of carbon dioxide mediated by anionic metal complexes
… complex with typical dehydrating reagents, e.g organic acid anhydrides, is shown to proceed cleanly when cobaltocene, acting as an in situ reductant, is present to form the vanadium(IV) isocyanate complex (OCN)V(N['Bu]Ar) 3. The synthesis and structure of the bimetallic complex …
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Antibody-Based Detection of 3-Methylglutaconic Acid
The organic acid, 3-methylglutaconic acid (3MGA), is known to accumulate in urine of patients with disorders associated with compromised mitochondrial energy metabolism. Although the biochemical basis for this excretion is currently under investigation, there is evidence this metabolite can serve …
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