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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 50 for “"potassium hydroxide"”.
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The electrochemical behaviour of zinc-cadmium based anode materials in potassium hydroxide
A review is presented on the historical background to the development of primary cells, their performance characteristics and their fundamental electrochemistry.
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Quartz solubility in potassium hydroxide solutions under elevated pressures and temperatures with some geological applications
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology, 1954.
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A Contribution to the Knowledge of the Reimer Tiemann Reaction. The Role of the Potassium Hydroxide
University of Minnesota Masters thesis. 1915. 1 computer file (PDF); 42 pages.
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The oxidation of secondary alcohols by dipotassium tetraoxoferrate (VI) In concentrated and dilute potassium hydroxide solutions
<p>Potassium ferrate of known purity was used to oxidize three alcohols (propanol-2, 1,1,1-trifluoropropanol-2, and 1,1,1,3,3,3- hexafluoropropanol-2) in 8 ~ potassium hydroxide, and a series of substituted phenyltrifluoromethyl carbinols (m-nitrophenyl-, m-bromophenyl-, p-methylphenyl-, and …
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Electrochemical NOx reduction using a carbon nanospiked catalyst
… with three different electrolytes, Lithium hydroxide, Sodium hydroxide, and Potassium hydroxide has been compared. Identification and quantification tests for nitrate, nitrite, and ammonia indicated that nitrite is an intermediate product during nitrate reduction. The final product with …
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The characterization of starches and maltodextrins by proton nuclear magnetic resonance spectroscopy
… starches. Two methods were developed using 0.6 N potassium hydroxide-d/deuterium oxide (KOD) (Method I) and dimethyl sulfoxide-d$\sb6$ (DMSO-d$\sb6$) (Method II) as the solvents. A 90 degree pulse width for the (1,4) and (1,6) protons and minimal recycle time were used to eliminate interference …
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A study of the anodic behaviour of aluminium alloys in alkaline electrolytes
… consisted of, a 1: 1 mixture of 50% (w%v) sodium hydroxide and 30% (w/v) potassium hydroxide, improvements in performance were observed when compared to the results obtained from discharge in the traditionally used 30-40%. (w/v) potassium hydroxide. Firstly, in full cell discharge ( where the …
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Syntheses of tetrasubstituted azo- and azoxybenzenes
… diethoxynitrobenzenes with (a) ethanolic sodium hydroxide and zinc dust, (b) methanolic sodium hydroxide and zinc dust, (c) ethnolic potassium hydroxide, and (d) lithium aluminim hybride. A second aim was the synthesis of new dihalodialkosy-, dimethoxydimethyl-, and tetra-alkoxy-azo- and …
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Electrolytic production of hydrogen peroxide
… and activated carbon electrodes in 5 N sodium hydroxide, 0.1018 N sodium hydroxide, and 0.01018 N potassium hydroxide, saturated ammonium chloride and 0.043 N phosphoric acid were studied.
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Surface chemistry and material integration of metal oxide nanocrystals
… indium oxide nanocrystals are stripped with potassium hydroxide in order to transfer them into water, where it is mixed with the conductive polymer PEDOT:PSS in order to create conductive films with enhanced transparency over more opaque films containing just the polymer. Following the mixed …
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Investigating the effects of AC voltage signals on micro-channels machined with the Spark Assisted Chemical Engraving process
… quality and channel morphology. Sodium and potassium hydroxide solutions were used, and the combined effects of electrolyte type and waveform were mapped to show how they affected machining efficiency. The study also examined temperature in SACE by comparing heat-assisted and non-heated …
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Koh etching of silicon
… on silicon wafers have been carried out using potassium hydroxide (KOH) for different experimental etching conditions for concentration, temperature and time on (100) orientation p-type silicon wafers. Besides the basic etching conditions, the position of the immersed wafer also has …
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Analysis of T-2 Toxin in Feed and Animal Specimens
… the benzene fraction, which was washed with 1% potassium hydroxide to remove acidic compounds. Other extraneous materials were removed by silica gel column chromatography using acetonitrile as an elutant. The acetonitrile was removed by evaporation and heptafluorobutyryl imidazole (HFBI) was …
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A piezo-tunable gigahertz cavity microelectromechanical resonator
… inductor cavity formed by etching silicon in potassium hydroxide. Frequency tuning is performed by compressing the cavity to close the capacitor gap. Testing was done with a piezoelectric actuator for this task. The match between the modeled and measured impedance is extremely good up to and …
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A Study on the Nature of Anomalous Current Conduction in Gallium Nitride
… Atomic Force Microscopy (AFM), Defects, Molten Potassium Hydroxide (KOH) etching, Silvaco, Atlas, and Illumination.
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Synthesis and properties of lignin epoxide
… and epichlorohydrin using a catalyst system of potassium hydroxide and a phase transfer catalyst in toluene. The parameters studied were different epichlorohydrin level and temperature. The reaction was followed by HPLC and the structure of the product was identified with IR, ¹H and ¹³C NMR …
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Nanoporous carbon from corn cobs and its application
… activation of corn cobs using phosphoric acid or potassium hydroxide can lead to nanoporous carbon having surface area in excess of 3800 m²/g and pore volume of 2.5cc/g. Dried, crushed, corn cobs were carbonized at temperatures between 450- 900⁰C and chemically activated using H₃PO₄ and KOH. The …
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The synthesis and properties of selected transition metal-pyrazole complexes and their application towards homogeneous catalysis
… towards bases, specifically; triethylamine, potassium hydroxide and 1, 8-bis (dimethylamino)napthalene, has also been explored. Whilst deprotonation of a Ni(II) pyrazole complex, trans-[NiCl 2 (pzH)4], has been found to result in the polymeric [Ni(pz) 2. H 20]^ deprotonation of the analogous …
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Enhancing Gas Absorption with Nanoengineered Surfaces for Bubble Manipulation
… captive bubbles when using a moderately alkaline potassium hydroxide as an absorbent solution for carbon dioxide gas. While the average reaction rates of non-spreading bubbles typically decrease with bubble size, the surface-enhanced absorption of spreading bubbles reverses this trend, enabling …
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Enhanced Fabrication of Microdroplet Generator Nozzle Arrays: Optimizing KOH Etching for Microfluidic Applications
… wet etching of pyramidal nozzles using a basic potassium hydroxide (KOH) solution. Given the integral role of nozzle geometry in device operation, high-precision techniques including Reactive Ion Etching (RIE), Deep Reactive Ion Etching (DRIE), and KOH wet etching were employed. A tapering …
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