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Showing 1 to 20 of 21 for “"Oxidation Experiments"”.
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Effects of Surface Oxidation on Vacancy Defects in Beta Nickel-Aluminum Alloys
… has been used to make observations of the oxidation process in (beta)-NiAl alloys annealed under controlled conditions of temperature and oxygen partial pressure. Binary Ni-Al alloys, with nominally 47.5, 50.4 and 52.5 at .% Al, were examined. The Auger spectroscopy analysis showed that the …
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Treatability of Dissolved Organic Nitrogen in Truckee Meadows Water Reclamation Facility Using Coagulation or Ozone Treatment
… of ozonation could remove DON effectively. Ozone oxidation experiments were performed on both filter effluent and final effluent samples. Ozonation alone was able to decrease DON levels; however, the total nitrogen level did not decrease since nitrate (NO3-) accumulation was equal to the DON …
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In situ XAS-Untersuchungen zur Partialoxidation von Acrolein an Mischoxidkatalysatoren
… active and selective catalysts for the partial oxidation of unsaturated aldehydes. They are widely used in Megaton-scale industrial processes like the partial oxidation of acrolein to acrylic acid. The macroscopic reaction kinetics of vanadium molybdenum oxide catalysts for partial oxidation …
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The aging of organic aerosol in the atmosphere : chemical transformations by heterogeneous oxidation
… the general understanding of the narrow class of oxidation reactions that occur at the interface between the particle surface and the gas-phase. The heterogeneous oxidation of pure erythritol (C4H1 00 4 ) and levoglucosan (C6H1 00 5) particles by hydroxyl radical (OH) was studied first in order to …
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Synthesis of analogues of nordihydroguaiaretic acid and their oxidative metabolism
… Following synthesis of this compound a series of oxidation experiments is performed consisting of: incubation in rat liver microsomes with and without the trapping agent glutathione (GSH), oxidation with mushroom tyrosinase, oxidation with silver oxide, and oxidation with horseradish peroxidase. …
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The Role of Angiotensin II in Skeletal Muscle Metabolism
… number of effects were investigated. Fatty acid oxidation and lipid synthesis was measured using [1-14C]-palmitate, glucose oxidation and glycogen synthesis were measured using 14C-glucose. In addition,mitochondrial oxidative capacity was measured using an XF 24 Flux Analyzer (Seahorse …
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Chemical reduction and oxidation combined with biodegradation for the treatment of a textile dye wastewater
… Reduction of the dye wastewater followed by oxidation, however, provided positive results (color reduction and biodegradation). A series of reduction/oxidation experiments on the textile wastewater were performed: treatment of 17 percent, 33 percent, 67 percent, and 100 percent of the textile …
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Oxygen isotope systematics of nitrification
… water than expected. A series of lab and field experiments were set up in order to quantify the exchange, and then calculate the [delta]¹⁸O of nitrate with these values. The lab experiments tested the exchange in ammonia oxidation, using ammonia oxidizing bacteria, Nitrosomonas sp. C113a and …
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Studies toward the synthesis of celastrol and the late-stage hydroxylation of arenes mediated by 4,5-dichlorophthaloyl peroxide
… of a phenolic compound entails the direct oxidation of an aryl C-H bond remains to be a difficult synthetic challenge. Following our initial report describing the hydroxylation of arenes using phthaloyl peroxide, new peroxide derivatives were investigated to probe their reactivity in an …
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Surface chemistry and growth of oxide supported metal nanoparticles
… or redesign industrial catalysts. In our experiments, many ultra-high vacuum (UHV) techniques have been employed to investigate the atomic and electronic structure of the surface as well as the interface of the prepared samples. In particular, the surface-sensitive tools such as electron …
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Erosion-oxidation of mild steel in a fluidized bed environment
… at the same metal temperature. Short term oxidation experiments were conducted on mild steel to obtain oxidation kinetics for erosion-corrosion modelling. It was found that the initial apparent parabolic rate constant was an order of magnitude larger than at longer time. Erosion studies …
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Safety of light water reactor fuel with silicon carbide cladding
… is examined with an integrated approach of experiments, modeling, and simulation. High temperature (1100°C~1500°C) steam oxidation experiments demonstrated that the oxidation of monolithic SiC is about three orders of magnitude slower than that of zirconium alloys, and with a weaker impact …
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The Development of Energy Efficient Wastewater Treatment: Electrochemical Oxidation and PFACs liquid-liquid Extraction
… that can oxidize organic compounds by direct oxidation and indirect oxidation (hydroxyl radical HO•) on the anode. The benefits of EAOPs are: 1) They are driven by electric power. The stoichiometric connection between power consumption and pollutant removal in EAOP is almost linear. Therefore, …
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Tellurium, antimony, and selenium isotopes as indicators of elemental mobility
… metal and metalloid mobility, as different oxidation states can exhibit diverse geochemical behavior controlling solubility and adsorption affinity. Elucidating these processes is important in a wide range of geochemical applications, such as contaminant mobility, resource extraction, or the …
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A Computational Thermo-Chemo-Mechanics Framework for the Large-Scale Simulation of Material and Structural Failure in Hypersonic Environments
… this framework to render models of passive oxidation-induced fracture in ultrahigh temperature ceramics computationally tractable. First, a rigorous constitutive theory is shown to capture the molecular diffusion of oxidant through the reaction product layer using only fundamental transport …
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Microstructures and oxidation properties in hafnium-tantalum-nitride ceramics
… chemical inertness, high hardness, and moderate oxidation. These ceramics typically comprise either group IV or V metals bonded with boron, carbon or nitrogen. When in equal atomic ratio, a MX compound will nominally form, where M is the metal species and X the interstitial light element (boron, …
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Synthesis, Characterization, and Mixed-Valence Studies of Conformationally Constrained Bisferrocenyl Complexes for the Study of Through-Space S***π; Interactions
… one electron redox processes. The initial oxidation shows a 62 mV negative shift compared to the sulfide analog 2,6-bis(ferrocenyl)thioanisole, and an increased peak separation for the oxidations of 160 mV. No peak separation is observed in the extended sulfoxide system. No intervalence …
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Dünnschichtsysteme für den Einsatz in magnetischen Tunnelstrukturen
… In the second part, a UV light assisted oxidation process for preparation of MTJs is presented in the Co/Al-oxide/Co trilayer system. Investigations are presented and discussed on two different oxidation systems and the influence of the UV light on the oxidation process is shown. With low …
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Matrix Effects on Electrochemical Oxidation of PFAS in Real Wastewater Systems
… water treatment processes. Electrochemical oxidation has emerged as a promising technique for degrading PFAS, particularly in complex and high-strength wastewater systems. However, the efficiency of electrochemical oxidation is strongly influenced by the chemical composition of the water …
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