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Showing 1 to 18 of 18 for “"Molybdenum (Mo)"”.
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The Molybdenum Cofactor: Modeling the Swiss Army Knife of Metabolic Diversity
… ligand (MPT), uniquely found in mononuclear molybdenum (Mo) and tungsten (W) enzymes, continues to intrigue us. The complexity of this ligand has been suggested as a cog in Mo and W enzyme function, and the pterin has been increasingly appreciated for its electronic contributions. …
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Characterization of Residual Mineral Content of Bauxite Stockpiles in Saline County, Arkansas: An XRD Analysis Approach
… uranium (U), thorium (Th), gallium (Ga), molybdenum (Mo), and lanthanides (Ln). This study examines five stockpiles (SP1, Clay, SP2, SP3, and SP4) in Section 20 of the Aluminum Company of America (ALCOA) Saline County bauxite mine, using Xray Diffraction (XRD) on 25 samples to characterize …
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The marine biogeochemistry of molybdenum
… wisdom holds that the vertical distribution of molybdenum (Mo) in the open ocean is conservative, despite Mo's important biological role and association with Mn oxides and anoxic sediments. Mo is used in both nitrogenase, the enzyme responsible for N2 fixation, and nitrate reductase, which …
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R-matrix calculations in support of diagnostics for fusion and astrophysical plasmas
… thesis we develop and systematically analyse models which describe collisional processes involving neutral molybdenum (Mo I), neutral tungsten (W I), singly ionised iron (Fe II), and neutral iron (Fe I). While atomic data for the neutral stages of molybdenum and tungsten finds an important …
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Study of semiconductor and metal surfaces using a novel scanning Kelvin probe.
… a non-contact, non-destructive measurement mode allowing work function measurements at temperatures in the range from (300 - 1100) K. The work function is a multi-parameter variable highly sensitive to changes in surface and interface chemical composition, adsorbate induced surface dipole …
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Influence of molybdenum and sulfate supplementation and withdrawal of diets containing high copper broiler litter on tissue copper levels
… 50% broiler litter with the addition of 25 ppm molybdenum (Mo) and 5 g sulfate/kg feed. The 24 litter fed ewes were allotted to withdrawal times of 0-, 30-, 60- and 120-d. The control (basal) diet contained and the deepstacked broiler litter contained 8 and 257 ppm Cu, dry basis, respectively. …
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The marine biogeochemistry of molybdenum
… wisdom holds that the vertical distribution of molybdenum (Mo) in the open ocean is conservative, despite Mo's important biological role and association with Mn oxides and anoxic sediments. Mo is used in both nitrogenase, the enzyme responsible for Nz fixation, and nitrate reductase, which …
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Produção de hidrocarbonetos renováveis a partir da pirólise do óleo de macaúba (acrocomia aculeata) utilizando AlSBA-15, Mo/AlSBA-15, HBeta e Mo/HBeta
… AlSBA-15 and HBeta catalysts and catalysts with molybdenum (Mo/AlSBA15 and Mo/HBeta), aiming at the production of renewable fuels in the range of aviation biokerosene. The AlSBA-15 catalyst was synthesized by the hydrothermal method and the commercial zeolite HBeta activated by calcination. The …
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Development of Novel Slow-Release Micronutrient Fertilizers Using Mechanochemical Synthesis
… method for the formulation of boron (B) and molybdenum (Mo) fertilizers. More generically, the aim was to combine sustainable engineering and fertilizer manufacturing. The thesis consists of 6 chapters, including an overview of the literature relevant to this project (Chapter 1). Subsequent …
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Fabrication Refinements of Advanced Packaging Techniques for Medium-Voltage Wirebond-less Multi-Chip Power Modules
… higher operating temperatures as components move closer together to improve power densities. Devices that achieve higher switching speeds and lower specific on-state resistances also reduce losses. Wide bandgap devices (WBG) like silicon carbide (SiC) have a higher bandgap, higher electric …
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Theoretical and Experimental Studies of Radiation from High-Z Multiply Ionized L-shell Ions with Emphasis on X-ray Line Polarization
… line polarization, as well as non-local thermodynamic equilibrium kinetic modeling, which is used to understand the radiative properties of HED plasmas. The Electron Beam Ion Trap (EBIT) and a few HED plasma facilities are utilized along with an advanced set of diagnostics. The HED plasma …
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Characterization of the CRM occurrences in ore deposits of Sardinia
… importance and supply risk. This list includes, among others, elements such as Rare Earth Elements (REE) and lithium (Li) but also indium (In), germanium (Ge), tungsten (W), molybdenum (Mo), bismuth (Bi), niobium (Nb), tantalum (Ta), nickel (Ni) and cobalt (Co) whose supply in Europe is almost …
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Application of advanced fuel concepts for use in innovative pressurized water reactors
… resulting in less fissile mass at discharge and more fissile mass burned over an assembly's lifetime. A limited safety comparison was made for two reactivity insertion accidents: (1) highest worth rod ejection accident (REA) and (2) main steam line break (MSLB). The MSLB accident demonstrated a …
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LAYER BY LAYER NANOASSEMBLY OF COPPER INDIUM GALLIUM SELENIUM (CIGS) NANOPARTICLES FOR SOLAR CELL APPLICATION
… the stabilizing agent oleylamine (OLA) was removed through multiple cleaning processes, and in the second method ligand exchange was performed with polystyrene sulfonate (PSS). Zeta potential of CIGS nanoparticles dispersed in water was measured to be +61 mV. The surface charge of the …
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Trace element concentrations in geothermal springs and their impact on soil and vegetation in Siloam and Tshipise
… seasonal variations of the trace element mobility from the geothermal springs to the vegetation (Mangifera indica at Siloam and Acacia robusta at Tshipise) via soil. The geothermal spring water, soil and vegetation samples at both sites were collected from May – July (winter) and September …
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Synthesis, Molecular Structure and Reactivity of Di(1-cyclohepta-2,4,6-trienyl) thioether, S(C7H7)2 and Tri(1-cyclohepta-2,4,6-trienyl) amine, N(C7H7)3
… with one equivalent of 1 lead to the monosubstituted derivative Cr(CO)5[PhCH2S(C7H7)] (7), in which one seven-membered ring has remained unchanged and the other seven-membered ring has been transformed into a benzyl substituent. From the reaction of 1 with a mixture of …
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Dissipative processes in superconducting nanodevices: nanowire-resonators, shunted nanowires, and graphene proximity junctions
… have been used by other groups to make non-demolition measurements of a qubit. The motivation of this thesis will be the merging of the fields of superconducting nanowires and the technique of using superconducting microwave resonators to study junctions by incorporating a nanowire into the …
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Fate of metals in presence of minerals and mineral-organic assemblages
… re-suspension, industrial activities, and atmospheric deposition. Metals pose health and environmental risks at high concentrations due to their potential toxicity and bioaccumulation, but many trace metals also serve as essential micronutrients for biogeochemical processes in natural aquatic …