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 47 for “"Co-solvent"”.
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Effect of a co-solvent feedstock on the synthesis of biodiesel via heterogeneous catalysis
Research has been conducted regarding a single phase feedstock solution to produce biodiesel. Biodiesel production usually uses a two-phase feedstock which causes several issues. The two different feed stocks have been compared using several methods. The single phase feedstock, consisting of …
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Impact of mixed solvent on co-crystal solubility, ternary diagrams and crystallisation scale-up. Crystallisations of Isonicotinamide ¿Benzoic Acid Co-crystals from Ethanol ¿Water Co-solvent System.
… the pharmaceutical industry and the challenge to control the desired active pharmaceutical ingredient (API) with the specific chemical and physical properties has led to more development in the drug industry. Increasing the solubility and the dissolution of the drug will increase its …
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Biofuels from Liquefaction of Marine Microalgae: Production, Upgrading, and Environmental Impacts
… production as it grows rapidly even in adverse conditions, and fixes carbon dioxide from the atmosphere by photosynthesis. Hydrothermal liquefaction (HTL) of microalgae is a promising conversion technology in which algal biomass is treated as an aqueous slurry under high temperature and …
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Formation of Cyclodextrin-Drug Inclusion Compounds and Polymeric Drug Delivery Systems using Supercritical Carbon Dioxide
… engineering and drug delivery. Scaffolds with controlled pore morphologies have been generated which incorporate cyclodextrin-drug inclusion complexes as the drug delivery component. Supercritical CO2 was explored as the main processing fluid in the complex formation and in the foaming of the …
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Synthesis and Characterization of Disulfonated Poly(Arylene Ether Sulfone) Random Copolymers as Multipurpose Membranes for Reverse Osmosis and Fuel Cell Applications
… several disulfonated poly(arylene ether) random copolymer membranes in fuel cell and reverse osmosis applications. Poly(arylene ether)s were prepared by direct step copolymerization using a third monomer 3,3–-disulfonated 4,4–-dichlorodiphenylsulfone. The membrane properties of a …
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An investigation of direct C-alkylation of 2,4-oxazolidinedione and 5-phenyl-2,4-oxazolidinedione utilizing dialkali salt intermediates
The effects of solvent, base strength, nature of halide, number of equivalents of base, and number of equivalents of halide on the course of C-alkylation of 2,4-oxazolidinedione and 5-phenyl-2,4-oxazolidinedione were investigated. The highest isolated yield (49%) of …
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Nanoscale Thermal Transport at Solid -Liquid Interfaces
… measurement to probe thermal transport in Au-core polymer-shell nanoparticles. The addition of an organic co-solvent to the suspension causes the polystyrene component of the polymer shell to swell and this change in the microstructure of the shell increases the effective thermal conductivity …
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Investigating the Interaction of Chitin in Organic Electrolyte Solutions Using Molecular Dynamics
… to disrupt and dispersion forces to overcome, all of which make it insoluble in most common organic solvents and water under moderate conditions. Much work has been devoted to improving the dissolution of biopolymers, via alternative solvents or by developing new ground-breaking …
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A multi-functional electrolyte for lithium-ion batteries
… pack. Current TMSs employ single-phase liquid cooling to the exterior surfaces of every cell, decreasing the volumetric and gravimetric energy density of the pack. In the present study, a novel, internal TMS that utilizes a multi-functional electrolyte (MFE) is investigated, which contains a …
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Polymeric Nanocarriers And Their Oral Inhalation Formulations For The Regional Delivery Of Nucleic Acids To The Lungs
… metered-dose inhalers (pMDIs), are the most commonly used OI in treatment of lung diseases and are thus promising OI devices to be used for the delivery of nucleic acids to the lungs. However, progress in the development of pMDI formulations for the delivery of DNA and siRNA to the lungs has …
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Capillary supercritical fluid chromatography
… to characterize the performance of capillary columns manufactured specifically for SFC applications. The columns were tested for inertness, efficiency, and immobilization before and after extraction with the supercritical CO₂ solvent. Stable deactivation layers were obtained with polyethylene …
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Bioavailability of organic contaminants in sediments.
… is largely dependent on the freely dissolved concentration of these pollutants. However, measuring these is challenging, due to the low concentrations of lipophilic contaminants in the environment and their strong affinity for particles and for traditional sampling (filtration and …
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A novel route to fluoroarenes from trifluoroethanol
… of fluoroarenes using a palladium-catalysed coupling/electrocyclisation methodology. Difluoroenolzinc coupling partners, 1-(N,N-diethylcarbamoyloxy)-2,2-difluoro-1-zinc chloride and 2,2-difluoro-1-(2'-methoxy-ethoxymethoxy)-1-zinc chloride were prepared from trifluoroethanol at near ambient …
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SYNTHESIS AND CHARACTERIZATION OF BIODIESEL FUELS FROM FURFURYL ALCOHOL AND SPENT COFFEE GROUNDS
… using several different triacylglycerides, alcohols, and catalysts. In this study, fatty acid methyl esters (FAMEs) and fatty acid ethyl esters (FAEEs) were produced from their respective alcohols and coffee oil, using either a basic (K<sub>2</sub>CO<sub>3</sub>) catalyst or an acidic catalyst …
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The drying of foods using supercritical carbon dioxide
… was dried using this technique. Addition of a co-solvent (ethanol) to the supercritical fluid was used as a method to increase the water solubility in the supercritical fluid and therefore aid drying. Analysis of the dried and rehydrated product structure, rehydration properties and mechanical …
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Fate and remediation of emerging organic contaminants in aquatic and soil environments
… poses significant risks to human health and ecosystems. While past research has improved our understanding of the processes controlling the fate and treatment of some classes of synthetic organic chemicals, the fate of many emerging and unregulated micropollutants of concern remain largely …
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Self-assembly and selective swelling in Lamellar block copolymer photonic gels
Materials with responsive structural color have broad applications ranging from sensing to smart coating. Nature provides inspirations for the design of such materials. Mimicking the structure of the skin elements responsible for cephalopod's fast camouflage, we made photonic gels using lamellar …
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Part I: Mechanistic Insight in Alkyl-Alkyl and Aryl-Aryl Negishi Cross-Coupling Part II: Large Scale Synthesis of NHC Precursors: 2,6-DI(3-Pentyl) Aniline and 2,6-DI (4-Heptyl) Aniline
… efficient method for alkyl-alkyl Negishi cross-coupling reaction of unactivated primary alkyl halides with higher-order zincate species (synthesized from dialkylzinc and a non-coordinating halide salt in situ) using Pd-PEPPSI-IPent (Pyridine-Enhanced Pre-catalyst Preparation Stabilization and …
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Retro-Diels-Alder routes to 4,5 disubstituted cyclopentenones
… of 4,5-disubstituted cyclopentenones was conducted in light of recent interest on cyclopentenone prostaglandins (PGs) as a new class of anti-viral and anti-inflammatory agents. The strategy involved conjugate addition of various organocuprates to tricyclodecadienone derived from …
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