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Showing 1 to 20 of 46 for “"Chemical reduction"”.
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Chemical reduction and oxidation combined with biodegradation for the treatment of a textile dye wastewater
… the reducing agents. Although there was color reduction, the reduced wastewater was inhibitory to biological degradation. Additional tests were conducted with sodium hydrosulfite. These included reductions followed by pH adjustment, nutrient addition, pH adjustment and nutrient addition, and …
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The role of chemical reduction in decreasing uranium concentrations in natural groundwaters: A case study from India
The student, Perry Akrie, accepted the attached license on 2022-04-23 at 17:34.
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Recovery of Xylitol from Fermentation of Model Hemicellulose Hydrolysates Using Membrane Technology
… xylose or hemicellulose hydrolysates by either chemical reduction or microbial fermentation. Current technology for commercial production is based on chemical reduction of xylose or hemicellulose, and xylitol is separated and purified by chromatographic methods. The resultant product is very …
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Reduction of Solid Uranium Dioxide in Calcium Salts
… and voloxidation of spent oxide fuel, (3) oxide reduction of spent fuel, and then depending on the fuel structure and composition for the MSR, it continues by one or two of the following; – electrorefining, – chlorination, and – fluorination. The subject of this study focused on oxide reduction …
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Exploring Photocatalytic and Electrocatalytic Reduction of CO2 with Re(I) and Zn(II) Complexes and Attempts to Employ a Novel Carbene Ligand to this Endeavor
… there is a motivation to target the efficient chemical reduction of CO2. Re(I) integrated photosensitizers and catalysts, synthesized from commercially available ligands, are introduced with the selective CO2 reduction of formic acid, making for a unique class of Re(I) catalysts typically …
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Impurity-induced layer disordering of quantum well heterostructures by silicon diffusion from aluminum-reduced silicon dioxide and silicon nitride
… layer disordering (IILD) utilizing the chemical reduction of SiO$\sb2$ by Al (from high-percentage Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As) is employed to produce Si and O to effect layer disordering. This diffusion process is examined using secondary ion mass spectroscopy (SIMS) for both …
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Development of enclosed life support system for underground rescue employing a photocatalytic metal oxide thin film to generate oxygen from water and reduce carbon dioxide
… to generate oxygen from water and provides chemical reduction, or "fixation", of carbon dioxide. Oxygen is generated through a photolytic reaction involving the interaction of UV light and a titanium dioxide thin film, resulting in the generation of oxygen gas at a rate of 0.0507 L 02 / min …
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Monitoring for sulfonated azo dyes and their degradation products in industrial and municipal wastewater
… the dyes resulting from several biological and chemical treatment processes. Results indicate that chemical reduction and anaerobic biological treatment of the dyes both result in cleavage of the azo bonds and formation of aromatic amines such as p-(2-hydroxyethylsulfone)-aniline, a reduction …
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Asymmetric reduction using enzymes and Chiral chemical reagents
This thesis is concerned with the asymmetric reduction of achiral substrates to chiral products on a preparative scale. In the first case dihydrofolate reductase was used to catalyse the conversion of 7,8-dihydrofolic acid into (6S)- 5,6,7, B-tetrahydrofolic acid. The required coenzyme,NADPH, was …
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Low Temperature Electrical Transport in 2D Layers of Graphene, Graphitic Carbon Nitride, Graphene Oxide and Boron-Nitrogen-Carbon
… (BNC) were grown using thermal catalytic chemical vapor deposition (CVD) method. Liquid phase exfoliation technique was utilized to exfoliate graphene and graphitic carbon nitride samples in isopropyl alcohol. Chemical reduction technique was used to reduce graphene oxide (rGO) by …
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One pot synthesis of metal, carbides and polymeric aerogels
… (from fibrous to particulate, depending on the chemical identity and the concentration of the monomer), extremely high mechanical strength and they are flame retardant.</p> <p>Smelting dates to 3000 B.C. and is used to produce metal from the ore via chemical reduction with carbon. Carbon …
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The Fabrication of Thermoelectric Materials Using Functionalised Silicon Nanoparticles
… of methods. A one-pot synthesis based on the chemical reduction of inverse micelles has been used to produce SiNPs with ligands of varying alkyl chain length. These particles were characterised to determine how the chain length affects the surface functionalities and particle size. The …
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Isotopic study of uranium: determining the isotopic fractionation of uranium during abiotic reduction with iron(II)
… uranium (U(IV)) by microbial or abiotic chemical reactions. Unfortunately, due to uranium’s complex geochemistry, measuring concentrations does not reliably give an accurate indicator of the efficiency of removal. However, uranium isotope ratios can provide a direct way to track the …
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Metal-insulator transition in yttrium- and neodymium-doped lanthanum nickelates
… isostructural infinite-layer RNiO₂. Recently, chemical reduction of RNiO₃/STO thin films (R =Nd₀.₈Sr₀.₂) using CaH₂ into the RNiO₂ infinite-layer phase was found to have a zero-resistivity measurement below T [subscript C]= 9 − 15 K³. This study re-invigorated the SC community while leaving …
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Modeling and Simulation of High-Density Spray Combustion
… of state for the gas phase and cost-effective chemical kinetic modeling. Fuel injected as liquid must break up into droplets, evaporate, and mix with air before combusting. Models for these processes have been developed and need to be tested against experiments. As for the gas phases, the ideal …
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Molecular Sensing using Surface-Sensitised Plasmonic Nanogaps
… via reintroduction of a scaffold molecule and chemical reduction of the gold surface. The high signal enhancement enables the study of water monolayers trapped in nominally dry, sub-nm MLagg nanogaps, even in ambient conditions. These water monolayers can only be removed from the nanoparticle …
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Synthesis, Characterization, and Applications of Group 13 and 14 Complexes of Chelating Formazanate Ligands
… and their conversion to stable radicals via chemical reduction. The radicals were stabilized by geometric and electronic effects, due to the square-pyramidal coordination geometry adopted by the group 14 atom within the heteroatom-rich framework of the formazanate ligand. The results …
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Comprehensive Characterization of Nickel-Based Metallic Foams and Their Applications as Electrocatalyst Materials
… and includes the analysis of their structural, chemical, and electrochemical properties. Several materials and surface science techniques as well as electrochemical methods are used to examine the structural characteristics, surface morphology, and surface-chemical composition of these …
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