Global ETD Search
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 55 for “"Thiocyanate"”.
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Thiocyanate complexes of osmium
… in attacking the structure of the osmium thiocyanate complex. Preliminary investigations showed that the red complex could be prepared by the direct action of osmium tetroxide on solutions of sodium thiocyanate in perchloric acid. Complex colors developed in great excess of thiocyanate …
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Solvent extraction of cobalt from thiocyanate solutions
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Metallurgy, 1957
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Bisphosphonates and Aryloxyethyl Thiocyanate Derivatives: New Drugs Against Trypanosomatid Parasites
All together, this work represents a new approach to chemotherapy of important and difficult to treat diseases with a group of safe and well understood compounds not previously thought to be useful in infectious diseases.
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Biooxidation and Thiocyanate Leaching of Refractory Gold Ore in One-Step
… attracted attention. Among different reagents, thiocyanate has been selected as the promising alternative to cyanide. Compared to cyanide, thiocyanate is less toxic to humans and aquatic organisms, and safer for the environment. First, a feasibility study on gold extraction from an oxide ore by …
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Formation of thiocyanate in bioleaching residues and its effect in PGM recovery
… metal recoveries; however, the production of thiocyanate during the cyanide leach raised concerns in terms of significant cyanide loss but also whether thiocyanate contributed positively to PGM recovery. Cyanide present in processing liquors is known to react with various sulphur species, …
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The microbiological destruction of thiocyanate in activated sludge plants treating coke oven effluent
… of species of micro-organisms which destroy thiocyanate. The composition, production, toxicity and treatment of coke oven effluent at Corby steelworks are described. A review is presented which follows the progress made towards identifying and monitoring the species of bacteria which destroy …
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A review of the pharmacology and use of thiocyanate in the treatment of hypertension
Thesis (M.D.)--Boston University
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Structural and electrical characterisation of silicon and other semiconducting nanoparticle networks for use in sensor and photovoltaic applications
… metal recoveries; however, the production of thiocyanate during the cyanide leach raised concerns in terms of significant cyanide loss but also whether thiocyanate contributed positively to PGM recovery. Cyanide present in processing liquors is known to react with various sulphur species, …
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An investigation into the fundamental understanding of an activated sludge bioremediation process and optimisation of thiocyanate and cyanide destruction
… cyanidation process results in the formation of thiocyanate (SCN), often at relatively high concentrations (> 5 000 mg/L). The SCN and residual free CN are deported with the tailings as components of the liquid fraction. The concentration of SCN often exceeds the legislated discharge …
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The electrolytic reduction of osmium tetroxide in perchloric acid solution
… from a seminar report on the ruthenium III thiocyanate complex ion which was studied in perchloric acid solution. The seminar report given by Craig Townsend discussed how a spectrophotometric study by Yaffe and Voight (1951) was made of the ruthenium III thiocyanate complex ion, Similar …
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A study of chemolithoautotrophic bacterial rhodanese, and its potential contribution to cyanide wastage during cyanidation of biooxidized concentrates
… proportion of cyanide wastage is attributed to thiocyanate formation. Thiocyanate can be formed by spontaneous chemical reactions between reactive sulfur species and cyanide. The enzyme rhodanese (thiosulfate: cyanide sulfurtransferase EC 2.8.1.1) is also able to catalyze the formation of …
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The Toxicokinetic Behavior of Cyanide, Thiocyanate and 2-Amino-2-Thiazoline-4-Carboxylic Acid Following Cyanide Exposure in Multiple Animal Models Utilizing Novel Methods of Detection
… analysis of other cyanide markers (such as thiocyanate (SCN-) and 2-amino-2-thiazoline-4-carboxylic acid (ATCA)) has been proposed. Novel methods of simultaneous detection of cyanide and thiocyanate were developed utilizing chemical-ionization gas-chromatography mass-spectrometry (CI-GC-MS) …
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Dioxygen Electroreduction on Electrode Surfaces
Finally, thiocyanate (SCN) adsorption on Au electrode is examined. Both the calculations and the spectroscopy show that three different geometries are adopted by SCN in the potential region studied (0.0 V ≤ E ≤ 1.2 V vs. NHE). At low potential both N-bound and S-bound forms are found, at …
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Smoking Addiction Scale for Pregnant Women
… questionnaires and provided saliva samples for thiocyanate assay at the first prenatal visit, four to six weeks into prenatal care, and at the end of pregnancy. The SAI was developed from items on the baseline questionnaire on smoking beliefs and practices and were selected during a content …
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Studies of Some Co-Ordination Compounds of Iron and Cobalt
… species has been isolated, Iron III as the thiocyanate formed a spin-free violet black complex of stoichiometry Fel 1.5 (SCN)3. Ion exchange studies excluded the presence of [ Fe(SCN)6]3- species and Mossbauer data showed the presence of two definite iron sites, Tripyridylamine reacted with …
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Effect of addition agents on the properties of aluminum deposited from an aluminum chloride-sodium chloride melt
… lead chloride, 0.5 and 1.0 per cent; aluminum thiocyanate, 0.5 and 1.0 per cent; chromic oxide, 0.5 per cent; sodium cyanide, 0.1 and 0.5 per cent; and vanadium pentoxide, 0.1 per cent. The electrolysis was carried out in a 1000-millimeter beaker in a furnace heated by a 1000-watt element. The …
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An exploratory study of the possibility of using certain inorganic fused salts as electrolytes for the deposition of aluminum
… were chloride, fluoride, cyanide, sulfide, thiocyanate, formate and fluoborate. No electrolyte was found that gave a compact, adherent aluminum deposit. Investigation of a fused electrolyte containing 66 mol per cent aluminum chloride, 20 mol per cent sodium chloride and 14 mol per cent …
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PART I PREPARATION OF NOVEL LACTONES AND THEIR PRECURSORS DERIVED FROM METHYL SALICYLATE PART II NUCLEOPHILIC AROMATIC SUBSTITUTION IN A DINITROSALICYLIC LACTONE WITH RING OPENING AND ELIMINATION VIA MEISENHEIMER INTERMEDIATES
… methoxide, thiophenoxide, thiosulfate, sulfides, thiocyanate, cyanide, and several enolates. Reaction with a nucleophile was accompanied by the consistent loss of the (beta)-hydroxyethoxy unit. In several of these experiments, the isolation and characterization of Meisenheimer complexes was …
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A polarographic investigation of the reduction mechanism of certain cobalt (III) complex ions
… dithiocyanato-bis-(ethylenediamine) cobalt (III) thiocyanate and oxalato-bis-(ethylenediamine) cobalt (III) chloride both give irreversible waves, thereby complicating any proposal of a mechanism. The observed second reduction wave, though, appears to be caused by the formation of …
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