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Showing 1 to 20 of 27 for “"Gluconic acid"”.
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Glucose oxidase induction and the modelling of gluconic acid production using Aspergillus niger
… understand the production of glucose oxidase and gluconic acid using the Aspergillus niger bioprocess and predict its response to operating conditions. Glucose oxidase and gluconic acid are produced by a wide range of microbes and have a variety of applications. In this study Aspergillus niger was …
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The production of oxalic, citric, and gluconic acids from plantation molasses
… of developing a process for producing citric and gluconic acids from plantation molasses.</p><p>There is an evident need for such a process. At the present time, these acids are being produced by processes in which refined sugar is the principal raw material. If molasses could be used in place of …
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Synthesis and characterisation of carbon supported gold catalysts prepared by ion-exchange
… friendly processes. Glucose yielding gluconic acid is an industrially important reaction (Biella et aI., 2002). Gluconic acid and its salts are used as water-soluble cleansing agents or as additives in food and beverages which makes these products important in industrial applications …
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Flow Injection Determination of Sugars by Combining Immobilized Enzyme Reactors and Chemiluminescence Detection
… in the presence of glucose oxidase to produce gluconic acid and hydrogen peroxide and subsequent detection of the hydrogen peroxide produced by chemiluminescent reaction with luminol has been widely used.
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Polianilino ir pilipirolo, aukso nanodalelių bei įvairių elektronų pernašos tarpininkų taikymas gliukozės biologiniuose jutikliuose /
… which spontaneously hydrolyzes to gluconic acid reaction, was proposed in this work. Catalytic glucose oxidase activity was used for pyrrole and aniline polymerization. It is shown that the solution of glucose, oxygen and dissolved enzyme - catalyzed reaction that formed a strong …
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Polianilino ir polipirolo, aukso nanodalelių bei įvairių elektronų pernašos tarpininkų taikymas gliukozės biologiniuose jutikliuose /
… which spontaneously hydrolyzes to gluconic acid reaction, was proposed in this work. Catalytic glucose oxidase activity was used for pyrrole and aniline polymerization. It is shown that the solution of glucose, oxygen and dissolved enzyme - catalyzed reaction that formed a strong …
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The transcription factor, fixK, plays a central role in carbon source metabolism and cellulose synthesis in Komagataeibacter species
… its role in cellular metabolism. Growth, pH, gluconic acid, and cellulose yield were measured in static and agitated cultures grown in the presence of glucose, fructose or sucrose. BcsZ (formerly CmcAx) was found to be carbon-source regulated. K. hansenii was dependent on fixK for growth in …
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The development and application of a multi-objective optimization technique for chemical processes and controller design
… operating conditions for the production of gluconic acid and for determining optimum tuning parameters for PID controllers. The optimization strategy developed is performed in two steps: the approximation of the set of feasible solutions called the Pareto domain using the Dual Population …
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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 the …
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Metabolic basis for the preferential utilization of disaccharide, by the cellulose-decomposing bacterium, cellvibrio gilvus (nov. sp.)
… required for growth. Volatile and non-volatile acids, volatile neutral compounds, and carbon dioxide constituted the fermentation products. A preference for cellobiose was shown by a 30 to 46% greater growth rate than resulted on glucose. An investigation was conducted to explain this …
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Catalytic Conversion of Cellulose to Carboxylic Acids through Aqueous Phase Partial Oxidation
… through oxidation reactions to carboxylic acids with high selectivity. Noble metal loaded metal oxides and metal oxides were tested for their catalytic activity in the process. Gold nanoparticle loading was found to promote a yield of 12% by carbon weight of lactic acid as a result of Lewis …
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The enzymatic release of glycosidically-bound terpenes in must
… in the above mentioned cultivars was oxidised to gluconic acid by glucose oxidase, prior to attempting monoterpene release by Rohapect C. Although no marked increase in the release of total terpenes occured, a significant increase in the concentrations of some individual terpenes could be …
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Growth and metabolism of Aquaspirillum gracile
… A. gracile is one of the few spirilla that yield acid reactions from sugars, but its sugar catabolism has not been previously investigated. Only D-glucose, D-galactose, and L-arabinose are attacked. The soluble portion of extracts of glucose-grown cells was found by spectrophotometric methods to …
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The polymerization of lactic acid anhydrosulphite by anionic initiators
… 2-dioxathiolan-4-one-2-oxide (lactic acid anhydrosulphite (LAAS)) using anionic initiators under various conditions. Poly(lactic acid) is a biodegradable polymer which finds many uses in biomedical applications such as drug-delivery and wound-support systems. For such applications it …
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Maize β-glucosidase substrate specificity and natural substrates
… The best competitive inhibitors were D-gluconic acid lactone, dhurrin, and 2,4- dihydroxy-7-methoxy-2H-1, 4-benzoxazin-3(4H)-one (DIMBOA) (K<sub>i</sub>'s< 1 mM). The enzyme had broad substrate specificity and could cleave many glycosides with hydrophobic aglycones. One major substrate, …
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ENZYMATIC PRODUCTION OF PURIFIED ISOMALTOOLIGOSACCHARIDES PREBIOTIC PREPARATIONS AND THEIR FULL QUALITATIVE AND QUANTITATIVE CHARACTERIZATION
… saccharides, present in IMO preparations, into gluconic acid which presents various advantageous techno-functional properties as well as nutritional properties, in particular, prebiotic.
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Honey as a Source of Natural Antioxidants
… and quantified, including phenolics, proteins, gluconic acid, enzymes, hydroxymethylfuraldehyde and ascorbic acid. A linear correlation was observed between ORAC activity of the investigated honeys and their phenolic and protein content. In addition, the first evidence for an ex vivo antioxidant …
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Dynamic regulation of pathways by down-regulating competing enzymes
… Hxk1 enzyme resulted in a 50-fold increase in gluconic acid and a 3-fold improvement in isobutanol yields from glucose. Extending this concept to other microorganisms, engineering downregulation of competing enzymes is dependent upon the ability to deplete a protein of interest in an inducible …
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Catalytic conversion of biomass-derived molecules into mono- and dicarboxylic acids and esters
… of fuels and chemicals. Mono- and dicarboxylic acids and esters are key intermediates to chemical products, especially for biodegradable polymers. This thesis has addressed the challenges in chemocatalytic synthesis of mono- and dicarboxylic acids and esters, including gluconic acid, succinic …
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Development and evaluation of glucose-responsive biomaterials as self-regulated insulin delivery systems
… as a glucose sensor, which converts glucose to gluconic acid and reduces the pH of the microenvironment when glucose levels are high. This change in pH acts as a trigger to release insulin on demand The first system uses the pH-responsive polymer acetalated-dextran to formulate nanoparticles …
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