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 38 for “"isopropyl alcohol"”.
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Photoreduction of Benzaldehydes in Isopropyl Alcohol
No abstract prepared.
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Isopropyl alcohol to counteract effects of freezing on extended-storage alginates
… was to evaluate the effects of freezing and isopropyl alcohol (IA) on two extended-storage alginates. Impressions were made of a custom stainless steel model of known dimensions and stored for 96 hours at room and freezing temperatures with or without IA and then poured with Type IV gypsum. …
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Biotreatment of waste streams containing isopropyl alcohol and copper from semiconductor manufacturing
… for treating waste streams containing isopropyl alcohol (IPA) and copper. A consortium of bacteria capable of degrading IPA was selected and acclimated. This consortium was immobilized on activated carbon and used as packing for a fluidized-bed reactor. The bioreactor was able to …
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The kinetics of the chromic acid oxidation of acetaldehyde
… between this reaction and the oxidation of isopropyl alcohol in aqueous medium, which other investigators have studied. The main runs were carried out at 25°, at an ionic strength of 0.3. The reaction was followed by the decrease in chromic acid concentration as determined with the Beckman …
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Hydrocyclone fractionation of chickpea flour and measurement of physical and functional properties of flour and starch and protein fractions
… flour was suspended in two different media, isopropyl alcohol or deionized water. In both media, high inlet pressure resulted in smaller geometric mean diameter of particles collected in the overflow and underflow. Isopropyl alcohol as a medium resulted in particles with smaller geometric …
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The operating characteristics of a fifteen plate fractionating column
… plates. The binary — mixtures distilled were isopropyl alcohol — water (distillation rates 157 - 376 gms./min., feed concentrations 3.1 - 10.8 mol per cent isopropyl alcohol, reflux ratio 3:1, and feed rate of 330 gms./min.), and toluene - ethylene dichloride (distillation rates 203 and 196 …
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Autonomous Small Scale Data-logger for Temperature Mapping
… up to 100oC, with exposure to chemicals such as Isopropyl Alcohol, Propylene Glycol, and De-Ionized water for a period of 2 hours with accuracy of ±0.5oC. The hydration process used for contact lens manufacturing is proposed as a target application for the developed system. The developed system …
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Realizing a design for a cloud chamber cooled by thermoelectric modules
… of super-saturated vapors of fluids such as isopropyl alcohol, which is used in this experiment. In order to address the problems with space, storage, and flexibility that typically exist with cloud chambers, this thesis explores the use of thermoelectric coolers (TECs) instead of dry ice to …
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Redesign and recalibration of a bubble-cap column used in the fractionation of isopropanol-water solutions
… in the separation of simple binary mixtures of isopropyl alcohol and water, to recalibrate all measuring devices used in the operation of the column, to develop an analytical method by which the composition of liquid samples from the column could be determined accurately and quickly, and, in …
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A TEST METHODOLOGY FOR MEASURING GASEOUS CONTAMINANT TRANSFER IN ENERGY WHEELS
… energy wheels was applied for ammonia, methanol, isopropyl alcohol, and carbon dioxide. The EATR values due to adsorption/desorption were highest for ammonia, followed by methanol, isopropyl alcohol, and carbon dioxide. The reason for the high adsorption/desorption of ammonia might be because its …
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Synthesis and microstructural characterization of phosphate cathode materials prepared by a polymeric steric entrapment precursor route
… water. A long-chain polymer such as polyvinyl alcohol (–[CH2–CHOH]-n or PVA) having a degree of polymerization corresponding to a molecular weight of 9,000 to 10,000 was used as the organic carrier for the precursors, which served for the physical entrapment of the metal ions in the dried …
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The kinetics and induced decomposition on the thermal decomposition of hydroperoxides /
… hydroperoxide at 120°C to 160°C in three alcohol solvents. These are methanol, ethajiol and isopropyl alcohol. The aim of the project was to examine the process of induced decomposition. Thermal decomposition of t-hutyl hydroperoxide and sec-butyl hydroperoxide indicate that these …
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The kinetics and solvent effects on the thermal decomposition of isopropyl peroxide and 1, 2-dioxane
… been determined for the thermal decomposition of isopropyl peroxide at l30o-l50oC in toluene and methanol and at l400C in isopropyl alcohol and water. Product studies have been carried out at l400C in these solvents. The decomposition of isopropyl peroxide was shown to be unimolecular with …
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The effects of common household cleaning agents and aging on the removal of quantitatively applied food stains from rayon, nylon, and olefin pile upholstery fabrics
… a detergent-vinegar solution, perchloroethylene, isopropyl alcohol, or ammonia water while attached to a simulated chair arm. Soil removal was evaluated by measuring light reflectance and color values on a Hunter Color-Difference Meter®. A consumer panel rated the specimens according to AATCC …
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The Effect of Endodontic Solutions on Resorcinol-Formalin Paste in Teeth
… Endosolv R®, 3% hydrogen peroxide, and 70% isopropyl alcohol. Seven samples per solution were tested and seven samples using water served as controls. One drop of the solution was placed over the set mixture in the canal, and the depth of penetration of a 1.5 mm probe was measured at 2, 5, …
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Synthesis of α, β-Substituted Alkenylphosphonates from α-Phosphonovinyl Triflates: I) Palladium Catalyzed Suzuki-Miyaura Cross-coupling with Aryl Boronic Acids II) Palladium Catalyzed Reduction
… simple reaction conditions, green solvents (isopropyl alcohol/H<sub>2</sub>O), a heterogeneous catalyst with a very low mole loading (0.007%), and a benign base. The 1-aryl-1-alkenyl phosphonates were prepared in 72-98% yield after purification. Part II of this thesis describes the …
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Synthesis of some analogues of n-substituted phthalimide and benzo-tetracyanoquinodimethane
… will also show that the Mitsunobu reaction with isopropyl alcohol give products from both N-alkylation and 0-alkylation. Molecular modelling calculations are in line with this observeration.
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Experimental investigation of a novel sonic hydrogen generator
… W. Various parameters such as temperature and isopropyl alcohol concentration are used to evaluate the hydrogen production process. Presented results indicate a variability in hydrogen production rates under different experimental conditions. For instance, distilled water at 25°C yields a …
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Low Temperature Electrical Transport in 2D Layers of Graphene, Graphitic Carbon Nitride, Graphene Oxide and Boron-Nitrogen-Carbon
… graphene and graphitic carbon nitride samples in isopropyl alcohol. Chemical reduction technique was used to reduce graphene oxide (rGO) by utilizing ascorbic acid (a green chemical) as a reducing agent. Detailed structural and morphology characterization of these samples was performed using state …
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A Computer Simulation of a Laboratory Coreflood , Using TRSl0-80 Surfactant in Berea
… (Looney) which used a TRSl0-80, Nonane, Isopropyl Alcohol, 1.0 wt. % NaCl Brine Slug. Since sodium and calcium concentrations were not measured in the coreflood effluent, and the effect of calcium on the slug was not known, the simulation was conducted on a history matching basis. Using …
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