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Showing 1 to 18 of 18 for “"NO Oxidation"”.
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Fundamental studies on copper zeolites for catalytic NO x abatement
<p>Stringent regulations in mobile NOx emissions have resulted in the development of Standard Selective Catalytic Reduction (SCR) as the dominant NOx abatement technology in lean burn diesel engines. Standard SCR is a reaction of nitric oxide (NO) with ammonia (NH<sub>3</sub>), in the presence of …
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Understanding and enhancing multi-pollutant control using carbon-based materials
… activated carbons were tested as catalysts for NO oxidation and adsorbents for toxic industrial chemicals, including HCN. The research culminates by investigating the potential for carbon to be used to simultaneously control NO and mercury (Hg) or polychlorinated dibenzo-p-dioxins and -furans …
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A density functional theory study on the rational design of heterogeneous catalysis
… with three adsorbates, atomic oxygen, OH and NO species, on the flat closed-packed alloy surface. Taking the oxygen reduction reaction (ORR) as an example, the mechanisms were investigated in detail using two different pathways, O2 dissociation and OOH formation. The overall volcano surface of …
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Dietary Intake and Bio-activation of Nitrite and Nitrate in Newborn Infants
… of as inert end products of nitric oxide (NO) oxidation, possibly carcinogenic food additives, or well-water contaminants. However, recent studies have shown that nitrate and nitrite play an important role in cardiovascular and gastrointestinal homeostasis through conversion back into NO …
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Dynamic Incompressible Navier-Stokes Model of Catalytic Converter in 1-D Including Fundamental Oxidation Reaction Rate Expressions
… have been effective in the past, they might not work with new versions of catalytic converters and the architectures being proposed. In particular, classical models neglect viscosity, conductivity and diffusion in the bulk gas phase. However, in low flow rate regenerative catalysts, these …
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Adsorption of cobalt on gamma-Fe{u2082}O{u2083}
… a composition near CoFe₂O₄ (cobalt ferrite). No oxidation of Co(II) to Co(III) was observed. Surface analysis also suggests that cobalt-treated γ-Fe₂O₃ prepared using NaOH has a different surface chemistry than cobalt-treated γ-Fe₂O₃ prepared with NH₄OH. Following the adsorption of Co(II) on …
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Controlled delivery of nitric oxide for cytotoxicity studies
Endogenous synthesis of nitric oxide (NO) is essential for many physiological functions, including the immune defense. However, the sustained, high production of NO by immune cells (macrophages) that accompanies chronic inflammation may be cytotoxic, mutagenic and carcinogenic. To better understand …
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Experimental observations of aluminum particle combustion during hypervelocity water impact and penetration
Experiments conducted at the University of Illinois Urbana-Champaign have investigated the reaction between Al shaped charge jets and underwater environments. Although many qualitative and semi-quantitative characteristics are known, including pressure field augmentation, light emission from …
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Adatom Emission From Nanoparticles: Implications for Ostwald Ripening
… used to explore the microstructure of diesel oxidation catalysts (DOCs) in their working state (i.e. under oxidizing conditions). Model catalysts have been used to study the evolution of platinum and palladium nanoparticles. Both a statistical and a microscopic approach have been used to …
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Inkless Soft Lithography: Utilizing Immobilized Enzymes and Small Molecules to Pattern Self-Assembled Monolayers Via Catalytic Microcontact Printing
… pattern transfer in the form of self-assembled monolayers in regions of conformal contact. The resolution in uCP is ultimately limited to the diffusion of ink and the elastomechanical properties of the bulk stamping material. </p> <p>One way to improve resolution is to eliminate diffusion by using …
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Nitrogen oxide delivery systems for biological media
Elevated levels of nitric oxide (NO) in vivo are associated with a variety of cellular modifications thought to be mutagenic or carcinogenic. These processes are likely mediated by reactive nitrogen species (RNS) such as nitrogen dioxide (NO2) and peroxynitrite formed from the respective reactions …
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Nitric oxide reduction by non-thermal plasma and catalysis
… millions of tons of air pollutants such as NOx and SO2. The high cost and operating difficulties of prevailing selective catalytic reduction (SCR) process are driving R&D efforts towards alternative technologies and modifications to the SCR technology. Non-thermal plasma technique has been …
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Isolating, characterizing, and engineering novel Cu-proteins and peroxidases
… of study. I use protein engineering techniques not only to shed light on the mechanisms underlying such changes, but also to design new functionalities within our scaffold proteins and to enhance their properties for specific purposes, such as fuel generation. This work is divided into three …
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Dynamics and Kinetics of Singlet Oxygen Mediated Oxidation of Methionine in the Gas Phase, Hydrated Clusters and Solution
… and concluded with real-time methionine oxidation kinetics determination in aqueous solution. The reaction products, cross sections, and collision energy dependence were measured by ESI-MS. Density functional theory (DFT) calculations, Rice-Ramsperger-Kassel-Marcus (RRKM) statistical …
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Regulation of the nitric oxide receptor, soluble guanylyl cyclase
… the best established receptor for nitric oxide (NO) and regulates a great number of important physiological functions. Surprisingly, despite the wellappreciated roles of this enzyme in regulation of vascular tone, smooth muscle cell proliferation, platelet aggregation, renal sodium secretion, …
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Influence of natural organic matter on the mobility of arsenic in aquatic systems, soils and sediments
… today recognized as one of the most dangerous inorganic contaminants and threats for the world’s water resources. Arsenic is ubiquitious in the earth crust and humans are especially affected through As polluted drinking water supplies. The occurrence of high As groundwater concentrations is …
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Investigation of electrochemical interfaces at the molecular level
… Surface Stress Development during CO and NO Oxidation on Pt: Dynamic processes on the surface can be monitored through the use of in situ electrochemical surface stress measurements. With this technique, electrochemical oxidation of CO and NO on Pt is examined and the experimentally …
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Prediction of concentrations of reactive nitrogen species in aqueous solutions and cells
… species (RNS) derived from nitric oxide (NO) have been implicated in cancer and other diseases, but their intracellular concentrations are largely unknown. To estimate them under steady-state conditions representative of inflamed tissues, a kinetic model was developed that included the …