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Showing 1 to 20 of 21 for “"Copper sulphate"”.
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Screening for childhood anaemia using copper sulphate densitometry
The objective of this study was to evaluate copper sulphate densitometry as a screening method for anaemia in children. The accuracy of copper sulphate densitometry was also compared to clinical assessment for the presence of pallor and haemoglobin measurement with a BMS-haemoglobinometer. …
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The effect of copper sulphate on froth stability
… 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 platinum group minerals (PGM) flotation operations in …
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Experiments on the electrodeposition of copper from dilute copper sulphate solutions
Made available in DSpace on 2017-11-30T22:46:19Z (GMT). No. of bitstreams: 2 5958662.pdf: 2049071 bytes, checksum: daf700f7f69f4730a2ec5bc4434e7600 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1897
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Investigation into the kinetics, mechanisms and particle characteristics of selenium precipitation from copper sulphate solution.
The removal of selenium from copper sulphate solution prior to the electrowinning of copper is desirable in order to minimise contamination of the copper cathodes by selenium and other impurities. The selenium removal is effected by a precipitation process that takes place under high …
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An investigation into chemical factors that affect the behaviour of Gangue minerals in the flotation of PGM ores
… During flotation of PGM ores, reagents such as copper sulphate and sodium isobutyl xanthate (SIBX) are added to enhance the recovery of valuable minerals. Copper sulphate, although added as an activator for valuable minerals, as the conditions used has been shown to also activate gangue …
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In vitro culture studies of environmental factors and the effects of copper on a fouling alga, Cladophora glomerata (L) Kützing, which occurs in South African freshwater systems
… blooms in South Africa are to apply a dosage of copper sulphate, preceded by sulphuric acid where waters are alkaline, manual removal and draining the canals. For the purpose of this thesis the influence of specific environmental factors on the growth of C. glomerata and the effectiveness of …
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An electrochemical investigation of platinum group minerals
… thiol collectors to create hydrophobicity, and copper sulphate is often used to improve hydrophobicity and therefore recovery. Sodium ethyl xanthate (SEX) and sodium diethyl dithiophosphate (DTP) are commonly used as collectors on PGM concentrators. The erratic mineral variations in the Platreef …
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The role of complexing agents in the flotation of pentlandite-pyroxene mixtures
… of complexing agents and reagents (xanthate, copper sulphate) in the system at pH 9. Microflotation, zeta potential measurements, ToF-SIMS analyses (time of flight secondary ion mass spectrometry) and X-ray photoelectron spectroscopy (XPS) were used as tools in determining the extent of …
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Embryonation and efficacy of treatments on monogenean gill flukes infecting silver kob (Argyrosomus inodorus)
… formalin, freshwater. hydrogen peroxide and copper sulphate. Freshwater was found to be 100% effective on both species of flukes, whereas praziquantel was more effective at a higher concentration. The other treatments were not effective against the flukes and are not recommended for use.
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Electrodeposition of cermets
… and quartz, in contiact with solutions of copper sulphate/ sulphuric acid in terms of the electrokinetic (zeta) potential and also as surface charge density. The methocl used was that of streaming potential and streaming current measurement
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Synergistic effects between thiol collectors used in the flotation of pyrite
… argued in favour of the ratio. The effect of copper sulphate on the flotation performance obtained with pure cyclohexyl DTC and PNBX as well as with the collector mixture was also investigated.
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An in vitro assessment of the effects of feed-grade trace minerals on commercial phytase activity
… five different commercial phytases. Exposure to copper sulphate (ITM) greatly inhibited phytase activity compared to OTMs, at reflective inclusion levels. Similarly, exposure to iron sulphate (ITM) had a greater effect on phytase activity than OTMs, at reflective inclusion rates. The observed …
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Olive leaf spot: epidemiology and control
… the fungicides, boscalid, captan, carbendazim, copper hydroxide, copper sulphate, difenoconazole, dodine, kresoxim-methyl, and a kresoxim-methyllcopper hydroxide mixture, showed that all significantly (P<0.001) reduced OLS severity, with highest efficacy when applied up to 3 days pre- and 3 days …
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Mielių baltymo Sup35 GNNQQNY sekos mutantinių variantų kūrimas ir jų sintezė Saccharomyces cerevisiae ląstelėse /
… to induce the synthesis of target proteins by copper ions in yeast S. cerevisiae cells. To achieve this goal, targeted mutations (N8A, N9A, Q10A and Q11A) were introduced into the SUP35-GFP gene. These mutations were generated by PCR and cloned into vectors to amplify the genes in Escherichia …
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OXIDATIVE STRESS AND THE GUANOSINE NUCLEOTIDE TRIPHOSPHATE POOL: IMPLICATIONS FOR A BIOMARKER AND MECHANISM OF IMPAIRED CELL FUNCTION
… oxidative modification of GTP in the presence of copper and L-ascorbic acid, and evidence of oxo8GTP as an inhibitor of soluble guanylyl cyclase (sGC). A significant induction of oxo8GTP in cell-free preparations as well as in PC12 and HEK 293T cells exposed to physiologically relevant oxidative …
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OXIDATIVE STRESS AND THE GUANOSINE NUCLEOTIDE TRIPHOSPHATE POOL: IMPLICATIONS FOR A BIOMARKER AND MECHANISM OF IMPAIRED CELL FUNCTION
… oxidative modification of GTP in the presence of copper and L-ascorbic acid, and evidence of oxo8GTP as an inhibitor of soluble guanylyl cyclase (sGC). A significant induction of oxo8GTP in cell-free preparations as well as in PC12 and HEK 293T cells exposed to physiologically relevant oxidative …
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Biosynthesis of copper nanoparticles using a bioflocculant from Alcaligenis faecalis, characterization and its application
… in this present study, biosynthesis of copper nanoparticles was successfully achieved by using a bioflocculant from Alcalegenis feacalis and copper sulphate salt. Nanoparticles were characterized using a scanning electron microscope equipped with elementary detector (SEM), UV-visible …
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The sedimentology and diagenesis of copper-bearing rocks of the southern margin of the Damaran Orogenic Belt, Namibia and Botswana
… Damaran Orogenic Belt, and contain stratiform copper ore deposits. This thesis presents sedimentological, diagenetic and isotopic studies of these sediments, defines the controls on copper mineralization and presents a model for ore genesis. The above-mentioned Formations are reclassified into …
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Investigating Early-Stage Process Flow and Reactor Sequencing to Maximise Gold Extraction ln the Thiosulphate Leaching of Waste Printed Circuit Boards
… of WEEE. Waste PCBs contain valuable metals like copper (Cu) and gold (Au) that can be profitably recovered using metallurgical methods like hydrometallurgy, pyrometallurgy, or a combination of the two. Successful implementation of pyrometallurgical technologies have been demonstrated in …
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