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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 57 for “"Solution (Chemistry)"”.
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Effect of Solution Chemistry on Schwertmannite Formation
… the effect of formation conditions, specifically solution chemistry, on its physico-chemical characteristics. Previous studies indicate schwertmannite has highly variable bulk sulfate (Fe/S molar from 3-15) and water contents (Caraballo et al., 2013). In addition, both natural and synthetic …
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Polyoxoniobates: How Solution Chemistry Helps to Understand the Solid State
A structural model is proposed for the chemical B-site ordering in relaxor ferroelectric Pb3ZnNb2O9 and Pb3MgNb 2O9. The basis for this model is the imposition of order using a divalent cation nearest-neighbor exclusion algorithm on a random cubic lattice with 2:1 Nb:(Mg/Zn) occupancy. The ordered …
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Deposition of Metal Oxides and Metal Carbonyls on Silicon Surfaces Using Solution Chemistry
… the H-Si(111) surface and Co2(CO)8 in n-heptane solution reacted to form a well defined submonolayer coverage of Co(CO)4 above the surface plane of Si(111). Transmission Fourier-transform infrared spectroscopy analysis of (OC) 4Co-Si(111) yielded structural and geometric information about the …
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Spectroscopic investigations on the molecular motions and solution chemistry of the medicinal pigment curcumin.
… and the sodium dodecyl sulphate (SDS) micellar solution. The fluorescence quenching results show that curcumin forms both 1:1 and 1:2 Cu(II)−curcumin complexes and the binding constants are on the order of 10⁵ – 10⁸ M⁻¹, which indicate a strong binding between curcumin and Cu(II). The transient …
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A predictive flotation model based on adsorption, contact angle, coagulation, and solution chemistry in the alkylamine-quartz flotation system
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1984.
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Assessing the Role of Solution Chemistry and Organic Matter in the Genesis of the Dengying Formation Dolostones at Sichuan Basin, China
… clarify the role of organic matter abundance and solution chemistry in a putative microbial dolomite: the Neoproterozoic dolomite of the Dengying Formation, Sichuan Basin, China. Researchers debate the origin of dolomite with different data supporting a microbial model conflicting with late-state …
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Investigation of the solution chemistry and dermal absorption of novel copper (II) chelating agents that can serve as potential anti-inflammatory drugs
This study describes the investigation of the solution chemistry of the copper (II) complexes of homopiperazine and an adamentane derivative of homopiperazine (PCU.homo) using glass electrode potentiometry, UV/VIS spectroscopy, speciation modeling, nuclear magnetic resonance spectroscopy, blood …
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Gross N turnover and soil solution chemistry as influenced by fluctuations of soil water potential and water table in a Podzol and a fen soil
… table level on gross N turnover rates and soil solution chemistry in two different ecosystems in South-Eastern Germany. In a Norway spruce forest, the effects of decreasing water potential and prolonged periods of summer drought on soil gross N turnover were investigated by laboratory and field …
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Characterization of Poly(ethyleneimines) by Electrohydrodynamic Ionization Mass Spectrometry and Investigations of the Mechanism of Surfactant-Sensitization of Metal-Chrome Azurol S Complexes (Sampling, Transport, Spectroscopy, Micelle)
… effect of both the chemical structure and the solution chemistry of the polymer on its sampling behavior from glycerol.
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Kinetics of Nesquehonite Nucleation
… by many factors including temperature, solution chemistry, ion absorptions, and shape/size of nuclei. Previous research studied the effect of solution stoichiometry on the surface energy between nesquehonite and aqueous solution, which strongly relied on simple assumptions (including …
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Direct printing of lead zirconate titanate thin films
… ink jet printing. Included are details of the solution chemistry developed, printing conditions required for MEMS quality films, and thermal processing parameters that enable a strong piezoelectric response.
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Experimentally Derived Sticking Efficiencies of Microparticles using Atomic Force Microscopy: Toward a Better Understanding of Particle Transport
… Force data were measured in buffered aqueous solutions of varying pH and ionic strength to determine the influence of solution chemistry on particle removal from solution. Zeta-potentials were measured to determine the impact of particle and collector surface charge on force measurements. The …
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Effects of solution complexation on crystallization processes
… high-purity solid products. The impact of solution chemistry on the kinetics and thermodynamics of crystallization processes is neither well understood nor properly characterized. Therefore, there exists a need for research to develop chemistry that can exploit the effect of impurities, …
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A study on organic fouling of reverse osmosis membrane
… (such as pH, ionic strength, ion type) of solution chemistry had significant impacts on the fouling potential of organic solution. Additionally, apart from feed solution properties, more variables affected the organic fouling development in a long RO membrane channel, where it was found …
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The potentiometric determination of the formation constants of a novel class of macrocyclic polyaminocarboxylic acid ligands and the formation constants of the mercury(II)-glutathione complexes
… undergo a change in geometry when the pH of the solution is changed from acidic to basic. Electron spin resonance and UV-visible spectra confirmed these changes. The formation constants of the mercury(II)-glutathione complexes were also determined by potentiometric titrations. It was found that …
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DEVELOPMENT OF MATERIALS AND ELECTRODES FOR MICROBIAL BIOELECTROLYSIS SYSTEMS AND MONITORING OF MICROBIOLOGICALLY INFLUENCED CORROSION
… corrosion mitigation was governed primarily by solution chemistry, particularly carbonate and phosphate availability, rather than by microbial activity itself, highlighting the transition from microbiologically influenced corrosion to microbially mediated corrosion inhibition. The third part …
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Effect of Various Saturation Levels, Leaching Solution pH, and Leaching Cycle on Electrical Conductivity from Coal Mine Spoil Leachate
… the effects of column saturation, leaching solution chemistry, and leaching cycle on the release of TDS and associated elements from an unweathered sandstone. Treatments evaluating potential saturation, leaching solution pH, and leaching cycle included saturated, standard method, vacuum, and …
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Turnover and fluxes of carbon and nitrogen in a spruce forest under natural and extreme meteorological conditions
… (A/W) and freezing/thawing (G/A) events on solution chemistry and leaching losses of soils is barely known. This thesis aimed to study the effects of A/W and G/A events on soil solution chemistry and solute fluxes, in particular, of dissolved organic carbon (DOC) and inorganic nitrogen …
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Chemical vapor deposition and functionalization of fluorocarbon-organosilicon copolymer thin films
… been explored by using the techniques of CVD and solution chemistry in combination. Chains of poly(acrylamide) have been grafted onto fluorocarbon-organosilicon films as a first step towards the design of bioactive coatings that could potentially enhance the performance of medical implants.
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