Global ETD Search
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 21 for “"Carbon oxidation"”.
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Kinetic modeling of carbon oxidation
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Laboratory and Mechanistic Studies of Volatile Organic Carbon Oxidation Systems in the Atmosphere
… experiments are often conducted to measure VOC oxidation in a controlled laboratory setting, but these studies are may be complicated by vapor deposition on chamber surfaces and potential VOC decomposition in the Chemical Ionization Mass Spectrometers (CIMS) which are used to measure a broad …
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Iron reduction mediated increases in carbon oxidation and phosphorus precipitation in on-site wastewater systems
… and fermentation is the dominant process driving carbon transformation. Moreover, phosphorus, a major nutrient that causes eutrophication, accumulates in onsite wastewater systems from human and domestic wastes. Phosphate is of particular interest because of its growth limiting effects on microbes …
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Metabolic Studies on 1-Cyclopropyl-4-phenyl-1,2,3,6-tetrahydropyridinyl Derivatives by HPLC and LC-ESI/MS
… any hydroxylation reactions. Since both the a-carbon oxidation and N-descyclopropylation transformations are mediated by a single enzyme (either CYP2D6 or CYP3A4), we propose a common intermediate for both pathways, namely the cyclopropylaminyl radical cation generated by the SET pathway. This …
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Comparison of Biological Aerated Filter (BAF) performance using two granular sunken media at low organic and hydraulic loadings
… BAFs were collected thrice a week to evaluate carbon oxidation, solids removal and nitrification. In order to evaluate system recovery when BAFs are operated intermittently, a drying cycle of eleven days was introduced. Both media performed satisfactorily with respect to carbon oxidation and …
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Investigation of FAD Chemical Models to Study the Monoamine Oxidase Catalyzed Oxidation of Cyclic Tertiary-Allylamines
… of the monoamine oxidase (MAO) catalyzed oxidation of the cyclic tertiary allylamine 1-methyl-4-(2-methyl-1H-pyrrol-2-yl)-1,2,3,6-tetrahydropyridine (TMMP), which is a close analog of the parkinsonian-inducing designer drug 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). MAO-B …
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Investigation of Poultry Litter Bochar as a Potential Electrode for Direct Carbon Fuel Cells
Direct carbon fuel cell (DCFC) is a high temperature fuel cell (around 700 "C) that produces electrical energy from the direct conversion of the chemical energy of carbon. DCFC has a higher achievable efficiency of 80% compared to other fuel cells and the corresponding CO2 emission is very low …
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Element cycling in organic rich sediments on the Pakistan margin
… with measurements of microbiallymediated organic carbon oxidation reactions were determined at sites above, within, and below the oxygen minimum zone (OMZ) on the Pakistan margin of the Arabian Sea.<br/>Sampling was conducted before and during the late-to-post southwest monsoon, with the goal of …
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Black carbon in marine sediments : quantification and implications for the sorption of polycyclic aromatic hydrocarbons
… determining the fate of polycyclic aromatic hydrocarbons (PAHs) in the environment. Here, PAH sorption is proposed as the sum of two mechanisms: absorption into a biogenic, organic carbon (OC) fraction and adsorption onto a combustion-derived, black carbon (BC) fraction. To study BC adsorption, a …
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Distribution and Characteristics of Biomass in an Upflow Biological Aerated Filter
The biomass from a pilot-scale two-stage (carbon oxidation first stage, ammonia oxidation second stage) fixed-film biological aerated filter (BAF) was divided in three fractions depending on their attachment strength to the media: detached, easily detachable and strongly attached. VSS measurement …
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Cellular and acellular assays for measuring oxidative stress induced by ambient and laboratory-generated aerosol
… were identified for SOA precursors whose photooxidation products share similar carbon chain length and functionalities. A significant correlation between ROS/RNS levels and aerosol carbon oxidation state was also observed, which may have significant implications as atmospheric aerosol have an …
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Using Oligonucleotide Probes to Characterize Nitrification in a Two-Stage Pilot Scale Biological Aerated Filter System
A pilot-scale, two-stage (carbon oxidation stage one, ammonia oxidation stage two) fixed film biological aerated filter (BAF) process was operated on-site at a domestic wastewater treatment plant. Over the study period, hydraulic loadings to the system were varied, generating a range of organic and …
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The Influence of Hydraulic Loading Rate on Nitrification Performance in a Two-Stage Biological Aerated Filter Pilot Plant
A two-stage (carbon oxidation stage one, ammonia oxidation stage two) biological aerated filter was operated for 10 months on-site at a domestic wastewater treatment plant. Over the study, the system was operated at different hydraulic loading rates that resulted in a range of applied organic and …
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A Theoretical Approach to Guiding Biotechnological Improvement of Crop Photosynthetic Efficiency
… complete model of photosynthesis. The model of carbon metabolism incorporates the photorespiratory carbon oxidation pathway (PCOP) in addition to the Calvin cycle, starch synthesis, and triose phosphate export. Simulations using this model revealed that enzymes in PCOP are in excess for …
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The Investigation of the Active Sites of Monoamine Oxidase (MAO) A and B and the Study of MAO-A Mediated Neurotoxicity Using 4-Substituted Tetrahydropyridines
… oxidase A and B (MAO-A and MAO-B) catalyze the a-carbon oxidation of a variety of amines including neurotransmitters such as dopamine and serotonin. Although the primary structures of these enzymes have been established from the corresponding gene sequences, relatively little is known regarding …
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THE USE OF GASEOUS METAL OXIDE AS AN OXYGEN CARRIER IN COAL CHEMICAL LOOPING COMBUSTION
… process. To further investigate the mechanism of carbon oxidation by gas-phase MoO3, the adsorption of a gaseous (MoO3)3 cluster on a graphene ribbon and subsequent generation of COx was studied by density functional theory (DFT) method and compared with experimental results. The (MoO3)n -graphene …
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Development of physical models for the mesoscopic simulation of gas-surface interactions
… (reactive) and molecular (non-reactive) with carbon surfaces: flat (vitreous) and complex porous microstructure (FiberForm®) at high temperatures ranging from 500 K to 2000 K. These models may be employed directly in conventional computational fluid dynamics (CFD), kinetic simulation, and …
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Application of scalable and inexpensive modification on carbon in clean technologies
Carbon can be a game-changing material to meet the global challenges in freshwater production and renewable conversion and storage devices due to their versatile nature. However, its hydrophobic characteristics, poor stability, low electrical conductivity, and small number of active sites limit its …
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Iridium oxide supported on graphitized carbon for use as reversal tolerant anodes in pem fuel cells
… of the cell. During cell voltage reversal, carbon oxidation and water electrolysis occur at the anode to maintain the supply of protons and electrons to the cathode. These reactions are nonspontaneous and consume energy from the membrane electrode assembly (MEA), causing irreversible damage …
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Structural and Functional Microbial Ecology of Denitrifying Bacteria Using Different Organic Carbon Sources
… microbial populations grown on different carbon sources. Specific objectives were to: 1) diagnose bacteria specifically assimilating methanol and ethanol and determine denitrification kinetics induced by the two carbon sources; 2) investigate factors leading to nitrous oxide (N₂O) and …
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