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Showing 1 to 20 of 57 for “"Thiosulfate"”.
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Thiosulfate oxidation in a fluidized bed
… the possibilities of biologically oxidizing thiosulfate in a fluidized bed. A laboratory scale, autotrophic fluidized bed was continuously operated using a synthetic thiosulfate waste. The reactor was maintained at a hydraulic loading rate of 16.1 gpm/ft² and an influent thiosulfate …
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Electrochemical study of gold thiosulfate extraction process
Thiosulfate has received a specific attention in gold extraction industry as a non-toxic alternative lixiviant for cyanidation process. Barrick Gold Corporation has commercialized thiosulfate gold leaching process in Goldstike mine in Nevada, USA. However, there is still potential for technical …
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Hydrogenase and Thiosulfate Reductase From Desulfovibrio Vulgaris
Made available in DSpace on 2014-12-09T22:04:19Z (GMT). No. of bitstreams: 1 6915316.pdf: 3269181 bytes, checksum: b920d3815a77bc82f7b7e97e54f1ee61 (MD5) Previous issue date: 1969
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The X-Ray Structural Analysis of Barium Thiosulfate Monohydrate
Made available in DSpace on 2014-12-05T19:37:36Z (GMT). No. of bitstreams: 1 6100172.pdf: 2588850 bytes, checksum: ad54dec9f53638d277182ed7cd2e8c14 (MD5) Previous issue date: 1960
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Investigations of the Therman Treatment of Sodium Thiosulfate in Gas Streams for the Removal of I2
… this work was to study the performance of sodium thiosulfate in several systems. Sodium thiosulfate decomposition and SO2 conversion were analyzed using thermogravimetric analysis combined with chromatographic techniques. Thermogravimetric analysis (TGA) measurements determined the decomposition …
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In situ and ex situ surface investigations of thiosulfate, sulfate and chloride accumulation on stainless steel and aluminum
In the United States alone it is estimated that annual corrosion-related damages cost approximately 100 billion dollars. Clearly, much effort is needed to reduce the detrimental efforts of corrosion. One approach to accomplishing this task is to understand fundamental corrosion mechanisms. …
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Experimental and Numerical Studies of Single Manganese Sulfide Inclusions in Stainless Steel During Initiation of Pitting Corrosion
… pit initiation based a critical concentration of thiosulfate which results in depassivation of the stainless steel. The model supported the view that local acidification occurs after the initiation of pitting rather than trigger initiation. In addition, the model supported the hypothesis that pit …
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The evolution of hydrogen sulfide by Gluconobacter species
… 1% yeast extract, and 1% peptone) containing thiosulfate. This finding is puzzling, since the microbial evolution of H₂S is characteristic of anaerobic or facultative bacteria. The goal of this research was to determine the physiological role of H₂S evolution for the gluconobacters. A …
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Experimental and Theoretical Study of Inclusions During Initiation of Crevice Corrosion
… oxidation reaction were elemental sulfur and thiosulfate. Spectroelectrochemical cell experiments on MnS quantified the electrochemical production of thiosulfate. This finding linked the metallurgical and solution phases and suggested a depassivation mechanism based on a critical crevice …
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Metabolic and Kinetic impacts of the auxiliary energy source in model chemolithoheterotrophic Bacteria
… from the auxiliary electron donor, in this case thiosulfate, enter the respiratory chain. The data presented <br/>adds to the evidence that the main pathway of thiosulfate supported oxidative phosphorylation is through the terminal cytochrome-c oxidase via oxidation by thiosulfate dehydrogenase …
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Oxidation of aqueous sulfides in the presence of manganese dioxide
… product and the ratio is equal to 1. Above pH 8 thiosulfate is farmed and the ratio is higher. When oxygen is present, the major product at the lower pH values is still elemental sulfur, and at pH 9, thiosulfate and sulfate anions are j jfound. In the presence of oxygen and high pH, the Mn ions …
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A study of chemolithoautotrophic bacterial rhodanese, and its potential contribution to cyanide wastage during cyanidation of biooxidized concentrates
… species and cyanide. The enzyme rhodanese (thiosulfate: cyanide sulfurtransferase EC 2.8.1.1) is also able to catalyze the formation of thiocyanate using thiosulfate and cyanide as substrates. Therefore, the most relevant members of the microbial consortium responsible for biooxidation of …
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Assimilatory sulfur metabolism in marine microorganisms
… two marine bacteria, notably in the effect of thiosulfate on sulfate uptake. P. halodurans transports thiosulfate with a ten-fold higher affinity than sulfate. Sulfate and thiosulfate are mutually competitive inhibitors of transport, and the half-saturating concentration of thiosulfate for …
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Nutritional capability of and substrate suitability for Pseudogymnoascus destructans, the causal agent of bat white-nose syndrome
… by medium alkalinization, the reduction of thiosulfate generated hydrogen sulfide gas, chitinase and manganese dependent peroxidase activity were not visually demonstrated within eight weeks, and keratinase activity was not evident at pH 8 within eight weeks. We demonstrate that all P. …
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Develop a Sulfur-driven Autotrophic Denitrification Process for The Treatment of Industrial Wastewater Containing High Levels of Salinity in an Alkaline Environment
… Autotrophic Denitrification (SbAD) and Thiosulfate-based Autotrophic Denitrification (TbAD), under different salinities (0.1%, 3.5%, and 6%). The SbAD process was initially assessed, revealing that after 186 extensive enrichments, consistent nitrogen removal was achieved. The results …
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RECYCLING OF PRECIOUS METALS FROM WASTE PRINTED CIRCUIT BOARDS VIA A COMBINATION OF PYRO AND HYDROMETALLURGICAL PROCESSES
… on metal recovery. Then, instead of thiourea, thiosulfate was used, and various parameters were studied, including ammonia concentration, Cu (II) concentration, temperature, and solid-to-liquid ratio. In addition to these two reagents, glycine and sodium bromide were tested as sustainable …
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Biochemical and genetic characterization of mercaptopyruvate sulfurtransferase and paralogous putative sulfurtransferases of Escherichia coli
… the transfer of sulfur from mercaptopyruvate and thiosulfate, respectively, to sulfur acceptors such as thiols or cyanide. There is evidence to suggest that rhodanese can mobilize sulfur from thiosulfate for in vitro formation of iron-sulfur clusters. Additionally, primary sequence analysis …
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Characterization of PspE, a Secreted Sulfurtransferase of Escherichia coli
… acids) and catalyzes the transfer of sulfur from thiosulfate to cyanide forming thiocyanate and sulfite. Cation exchange chromatography of a freeze-thaw extract of a PspE-overexpressing strain yielded two major peaks of active, homogeneous PspE. The two peaks contained two forms of PspE (PspE1 and …
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