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Showing 1 to 20 of 52 for “"cupric"”.
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The relationship between cupric ion activity and the toxicity of copper to phytoplankton
… is to quantify the relationship between cupric ion activity and the toxicity of copper to phytoplankton and further to study the effect on copper toxicity of naturally occurring organic ligands. Culture experiments with an estuarine diatom Thalassiosira pseudonana (clone 3H) in highly …
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The relationship between cupric ion activity and the toxicity of copper to phytoplankton
Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Evaporative drying of cupric-chloride droplets in a thermo-chemical cycle of hydrogen production
… correlations that predict the behaviour of Cupric-Chloride droplets undergoing spraying and drying processes are developed. Cupric-Chloride is a chemical compound with the formula CuCl2 that is present as slurry or aqueous solution within the Copper-Chlorine (Cu-Cl) thermo-chemical cycle for …
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Evaporative drying of cupric-chloride droplets in a thermo-chemical cycle of hydrogen production
… and numerical solutions that predict behavior of Cupric-Chloride droplets undergoing spraying and drying processes. Cupric-Chloride (CuCl2) is present as molten salt and slurry within the Copper-Chlorine thermo-chemical cycle for generation of hydrogen. Utilizing low-grade heat from nuclear or …
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The Precise Determination of Equilibrium Constants by Constant Current Coulometry. The Copper - Cuprous - Cupric System
Made available in DSpace on 2014-12-05T19:37:54Z (GMT). No. of bitstreams: 1 6200651.pdf: 3523975 bytes, checksum: 56f374c0144be3a420f64efc560992e0 (MD5) Previous issue date: 1961
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Thermal performance of a Nam-Ju nanostructured copper oscillating heat pipe
… from thermal damage. The surface application of cupric oxide nanostructures to the interior heat pipe channel leads to a reduction of temperatures in the evaporator region of the oscillating heat pipe assembly by as much as 59.1%. The application of cupric oxide nanostructures to the oscillating …
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Interactions Between Copper and Chlorine Disinfectants: Chlorine Decay, Chloramine Decay and Copper Pitting
… and copper pitting corrosion. Sparingly soluble cupric hydroxide catalyzed the rapid decay of free chlorine, which in turn, led to production of less soluble and more crystalline phases of cupric hydroxide. The catalytic activity of the cupric hydroxide was retained over multiple cycles of …
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Electrochemically-mediated amine regeneration for carbon dioxide separations
… of a copper metal anode, which generates cupric ions that compete for the amine binding sites. For many amines, the complexation with cupric ions is more favorable than the complexation with CO₂. Reduction of the cupric ions from the amine sorbent onto a separate copper metal cathode …
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Electron spin-lattice relaxation in two heme iron and two blue-copper proteins at liquid helium temperatures
… azide, bovine ferri-hemoglobin azide, cupric azurin (P. aeruginosa) and cupric spinach plastocyanin were measured at 9.5 GHz using the pulse-saturation recovery method. Measurements covered a temperature range of 1.4 K to as high as 22 K, with corresponding relaxation rates up to …
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The mechanisms of melt stabilisation of polyolefins
… one (galvinoxyl), iodine, nitroxyl radicals and cupric stearate were found to be very efficient melt stabilisers particularly when processed in a restricted amount of air. The mechanisms of their melt stabilising action have been investigated and a common cyclical regenerative mechanism involving …
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Production of Copper-Complexing Ligands in Response to Elevated Concentrations of Copper in Marine <i>Synechococcus</i> spp.
… unknown structure which form complexes with free cupric ion. These ligands may contribute to the biological control of the levels of free cupric ions in surface seawater. <em>Synechococcus</em> spp. are known to produce metallothioneins (MT) in response to cadmium and zinc stress. In the present …
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The effect of mass transport on deposit quality in copper electrowinning
… characterized. The effective diffusivity of cupric ion was measured with a rotating disk electrode in CuSO<sub>4</sub>-H<sub>2</sub>SO<sub>4</sub> electrolytes at temperatures relevant to electrowinning, with and without additives. Adding 20 mg L<sup>-1</sup> of chloride ion increased the …
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Modeling and design for electrochemical carbon dioxide capture systems
… which manipulates the concentration of a cupric competitive complexing agent. Oxidizing copper results in a cupric-amine complex at the anode, releasing CO₂. Reducing this complex at the cathode regenerates amines for capture. This approach is more energy efficient than traditional thermal …
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The collectorless flotation of sphalerite
… recoveries above 35%, an excessive addition of cupric ions may result in a decrease in floatability. Batch flotation experiments conducted using Elmwood Mine sphalerite ore have shown that in addition to copper-activation, the addition of sodium sulfide was required to obtain high grades and …
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Analysis of hydrodynamic phenomena in a fluidized bed for thermochemical hydrogen production
This thesis examines transport phenomena of cupric chloride (CuCI2) hydrolysis within a fluidized bed. Conversions of CuCi2 and steam as a fluidizing gas are numerically investigated using a new non-catalytic gas-solid reaction model, proposed in the literature but here updated for the purposes of …
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The reaction of monochloromethyl ether with organometallic compounds
… by heating a mixture of zinc dust and powdered cupric citrate under an atmosphere of nitrogen. 5. This method gave a couple superior in laboratory use to the zinc-copper couples how generally employed.
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Effect Of Source Water Blending On Copper Release In Pipe Distribution System: Thermodynamic And Empirical Models
… underneath corrosion layer and tenorite (CuO), cupric hydroxide (Cu(OH)2) on the top surface. In terms of dissolution/precipitation mechanism controlling the copper concentration in bulk solution, cupric hydroxide thermodynamic model was developed. (2) Theoretical thermodynamic models were …
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Organisch-geochemische Untersuchungen der Oberflächengewässer aus dem Einzugsgebiet der Sielacht Esens (Ostfriesland)
… are compared with the oxidative degradation by cupric oxide (CuO). Ratios of lignin-derived compounds are indicative of the extent of oxidative degradation and suggest a highly degraded state of the lignin compounds in all samples. Samples from different locations show largely uniform molecular …
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