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Showing 1 to 20 of 29 for “"Effect of copper"”.
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The effect of copper sulphate on froth stability
… process implemented in the recovery of valuable minerals from unwanted gangue material. Copper sulphate is used as an activator in the flotation of base metal sulphides (BMS) as it promotes interaction of collector molecules with the mineral surfaces. It is also used in certain …
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The effect of copper on the eutectoid transformation in ductile iron
As a result of the shortage in the availability of suitable steel scrap, trace elements are unintentionally added to ductile iron from the scrap available for melting. The effect of some of these trace elements on graphite shape, the resulting microstructure, and the dimensional behavior of the …
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Synergistic precipitation strengthening effect of copper and niobium in high strength steel weld metal
Includes bibliographical references (pages 155-163).
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Visible reflectance spectroscopy to observe the effect of copper embedded socks on erythema in feet
Objective assessment of skin characteristics is necessary to aid in the clinical detection of erythema and debilitating skin conditions. The ability to treat different skin pathologies based on individual patient skin conditions will lead to fewer amputations and complications experienced by …
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The effect of copper on the growth, development and chemical composition of some dryland wheat cultivars
… metal accumulation in arable land as a result of mining activities, pesticides and fertilisers has become a global concern. Steinkopf and Concordia in the Northern Cape are well-known for subsistence farming, but just as well-known for the nearby copper mining industry. Very little research has …
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The effect of copper stress on inter-trophic relationships in a model tri-trophic food chain.
… security for the growing populations. The use of agri-chemical and products containing heavy metals inadvertently threaten both food security and the surrounding ecosystems from contamination, loss of productivity or ecosystem service. In the present study a series of experiments on the toxic …
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The influence of maternal nicotine exposure on development lung as gas exchanger: the protective effect of copper
The influence of tobacco smoking on the developing fetus is well reported. Maternal nicotine exposure during pregnancy and lactation interferes with fetal and neonatal lung growth and development, rendering the lungs more susceptible to damage and disease. interference with the normal developmental …
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Effect of copper and nickel on the performance of an activated sludge system treating cellulose acetate wastewater
This research investigated the effect of copper and nickel on the performance of a laboratory scale activated sludge system. The wastewater used for this research was the influent to the activated sludge process at the Hoechst Celanese cellulose acetate manufacturing plant, located at Narrows, …
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The effect of copper as a chemical promoter on the performance of a cobalt based Fischer-Tropsch synthesis catalyst
In the light of the fact that copper is used as a promoter for the iron catalyst and that the industry is looking at a commercial FT synthesis cobalt catalyst, it is essential to reinvestigate the effect of copper on a cobalt catalyst. Copper has an effect on the overall activity of iron and cobalt …
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Experimental Investigation of the Effect of Copper Nanowires On Heat Transfer and Pressure Drop For A Single Phase Microchannel Heat Sink
… heat transfer and pressure drop characteristics of a shallow rectangular single phase microchannel heat sink with hydraulic diameter of 0.672 mm and whose bottom wall is coated with Cu nanowires (CuNWs) of 200 nm in diameter and 0.050 mm in length. CuNWs are grown on Cu heat sink by …
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Evaluation of a copper lysine complex and copper sulfate in weanling and finishing pigs, and the effect of copper supplementation on circulating growth hormone and IGF-1 levels
The objectives of this research were 1) to evaluate CuS0₄ and a CU lysine complex (CuLys) as growth promotants for weanling pigs, 2) to assess the effects of feeding growth stimulating levels of Cu from both sources on dry matter digestibility (DMO) and mineral balance of finishing pigs, and 3) to …
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The Effect of Copper and Zinc Source on Pre-Weaning Performance of Cows, Health and Performance of Suckling Calves, and Post-Weaning Feedlot Performance, Carcass Composition, and Meat Quality of Calves
<p>During gestation an elevated level of nutrient intake is required by the cow in order to meet the requirements of the maturing fetus and if these requirements are not met, changes in fetal development can occur. However, little is understood about the effects of gestational manipulation of …
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Investigation of the promotional effect of Cu and Ag on iron-based Fischer-Tropsch catalysts using ferrites as model catalysts
… monoxide and monomers formed from the reaction of hydrogen and carbon monoxide. The catalytically active metals for industrial application are cobalt and iron. The commercially used iron-based Fischer-Tropsch catalyst is supported on silica (Si), to improve the dispersion of the active metal and …
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Synergistic effects between thiol collectors used in the flotation of pyrite
… dithiocarbamate (cyclohexyl DTC) when a mixture of these collectors is used in the flotation of pyrite at pH =4 and, secondly, why synergistic effects are observed, if any. The focus of the investigation was a 90:10 mole ratio mixture of PNBX and cyclohexyl DTC, although other collector ratios …
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Dose Determines if Soluble Copper is a Nutrient or an Antimicrobial for Legionella pneumophila in Premise Plumbing
The effect of copper on Legionella pneumophila in potable water plumbing systems is dependent on its dose and water chemistry. For instance, prior research demonstrated that the presence of aluminum hydroxide from anode rods in water heaters can bind copper and render high doses non-toxic. On this …
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ΕΠΙΔΡΑΣΗ ΤΗΣ ΠΑΡΟΥΣΙΑΣ ΤΟΥ ΧΑΛΚΟΥ ΣΤΟΝ ΠΕΡΛΙΤΙΚΟ ΚΑΙ ΜΠΑΙΝΙΤΙΚΟ ΜΕΤΑΣΧΗΜΑΤΙΣΜΟ ΤΩΝ ΧΑΛΥΒΩΝ
THE EFFECT OF COPPER ON THE ISOTHERMALLY PRODUCED BAINITE OR PEARLITE WAS INVESTIGATED, IN COPPER BEARING STEELS, TO GAIN A BETTER UNDERSTANDING OF ROW COMMONSUBSTITUTIONAL SOLUTES INFLUENCE PEARLITIC TRANSFORMATION IT WAS FOUND THAT PRECIPITATES BELONGING TO THE PHASE E-CU EXISTED WITHIN THE …
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Low temperature photoluminescence studies on sputter deposited cadmium sulphide/cadmium telluride heterojunctions and solar cells
… (PL). The PL was studied as a function of temperature (82-295 K) and laser excitation power (0.02-2 mW). The CdS/CdTe junctions were grown on transparent conducting oxide covered soda lime glass using rf-sputter deposition. It was found that the luminescence shifts from being dominated …
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Formation of Copper-Salivary Component Complexes and Its Effect on Sensory Perception
Copper in drinking water elicits a persisting bitter, metallic, or astringent taste. Characteristics and perception mechanisms of copper sensation have not been fully understood. Saliva is assumed to influence copper sensations via binding of salivary electrolytes or proteins with copper. The …
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Oxygenates in iron Fischer-Tropsch synthesis : is copper a selectivity promoter?
… iron catalyst promoted with small amounts of potassium and copper is one of the catalysts used in this reaction. Precipitated iron catalysts are chemically promoted with potassium in order to enhance the product selectivity, while copper is added as a reduction promoter which increases the …
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