Gotowe bibliografie tematyczne / Sulfides

Gotowa bibliografia na temat „Sulfides”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 31 lipca 2024

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Artykuły w czasopismach na temat "Sulfides"

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Thériault, Robert D., Sarah-Jane Barnes i Mark J. Severson. "The influence of country-rock assimilation and silicate to sulfide ratios (R factor) on the genesis of the Dunka Road Cu – Ni – platinum-group element deposit, Duluth Complex, Minnesota". Canadian Journal of Earth Sciences 34, nr 4 (1.04.1997): 375–89. http://dx.doi.org/10.1139/e17-033.

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The Dunka Road deposit is one of several Cu – Ni – platinum-group element (PGE) sulfide occurrences found along the northwestern margin of the Duluth Complex, where the host troctolitic rocks are in contact with metasedimentary rocks of the Animikie Group. Magma contamination through assimilation of sulfidic argillaceous country rocks is generally recognized as having played a key role in the genesis of the mineralization. Three main types of disseminated sulfide mineralization have been identified within the Dunka Road deposit: (i) norite-hosted sulfides, (ii) troctolite-hosted sulfides, and (iii) PGE-rich sulfide horizons. The norite-hosted sulfides are found either adjacent to country-rock xenoliths or near the basal contact. The troctolite-hosted sulfides form the bulk of the deposit, and occur throughout the lower 250 m of the intrusion. The PGE-rich sulfide horizons are typically localized directly beneath ultramafic layers. The composition of the different types of sulfide occurrences is modelled using Cu/Pd ratios. It is shown that each type results from the interplay of two main parameters, namely the degree of magma contamination and the silicate magma to sulfide melt ratio (R factor). The norite-hosted sulfides formed at low R factors and high degrees of contamination, as expressed by their PGE-depleted nature, low Se/S ratios, and elevated content in pyrrhotite and arsenide minerals. The troctolite-hosted sulfides formed at moderate R factors and small degrees of contamination, as shown by their moderate PGE content and mantle-like Se/S ratios. Finally, the PGE-rich sulfide horizons are modelled using elevated R factors from an uncontaminated parental magma, which is substantiated by their elevated noble metal content and Se/S ratios, and low pyrrhotite to precious metal sulfide ratio.
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Agarbati, Alice, Laura Canonico, Francesca Comitini i Maurizio Ciani. "Reduction of Sulfur Compounds through Genetic Improvement of Native Saccharomyces cerevisiae Useful for Organic and Sulfite-Free Wine". Foods 9, nr 5 (20.05.2020): 658. http://dx.doi.org/10.3390/foods9050658.

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Sulfites and sulfides are produced by yeasts in different amounts depending on different factors, including growth medium and specific strain variability. In natural must, some strains can produce an excess of sulfur compounds that confer unpleasant smells, inhibit malolactic fermentation and lead to health concerns for consumers. In organic wines and in sulfite-free wines the necessity to limit or avoid the presence of sulfide and sulfite requires the use of selected yeast strains that are low producers of sulfur compounds, with good fermentative and aromatic aptitudes. In the present study, exploiting the sexual mass-mating spores’ recombination of a native Saccharomyces cerevisiae strain previously isolated from grape, three new S. cerevisiae strains were selected. They were characterized by low sulfide and sulfite production and favorable aromatic imprinting. This approach, that occurs spontaneously also in nature, allowed us to obtain new native S. cerevisiae strains with desired characteristics that could be proposed as new starters for organic and sulfite-free wine production, able to control sulfur compound production and to valorize specific wine types.
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Andronikov, Alexandre V., Irina E. Andronikova i Tamara Sidorinova. "Trace-Element Geochemistry of Sulfides in Upper Mantle Lherzolite Xenoliths from East Antarctica". Minerals 11, nr 7 (16.07.2021): 773. http://dx.doi.org/10.3390/min11070773.

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Sulfides in upper mantle lherzolite xenoliths from Cretaceous alkaline-ultramafic rocks in the Jetty Peninsula (East Antarctica) were studied for their major and trace-element compositions using SEM and LA-ICP-MS applied in situ. Modal abundance of sulfides is the lowest in Cpx-poor lherzolites ≤ Spl-Grt lherzolites << Cpx-rich lherzolites. Most sulfides are either interstitial (i-type) or inclusions in rock-forming minerals (e-type) with minor sulfide phases mostly present in metasomatic veinlets and carbonate-silicate interstitial patches (m-type). The main sulfide assemblage is pentlandite + chalcopyrite ± pyrrhotite; minor sulfides are polydymite, millerite, violarite, siegenite, and monosulfide solution (mss). Sulfide assemblages in the xenolith matrix are a product of the subsolidus re-equilibration of primary mss at temperatures below ≤300 °C. Platinum group elements (PGE) abundances suggest that most e-type sulfides are the residues of melting processes and that the i-type sulfides are crystallization products of sulfide-bearing fluids/liquids. The m-type sulfides might have resulted from low-temperature metasomatism by percolating sulfide-carbonate-silicate fluids/melts. The PGE in sulfide record processes are related to partial melting in mantle and intramantle melt migration. Most other trace elements initially partitioned into interstitial sulfide liquid and later metasomatically re-enriched residual sulfides overprinting their primary signatures. The extent of element partitioning into sulfide liquids depends on P, T, fO2, and host peridotite composition.
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Zhang, Ya Hui, Xi Cheng i Qing Wang. "A Low Temperature Precursor Sulfuration Route to Metal Sulfides Nanomaterials". Advanced Materials Research 148-149 (październik 2010): 1404–7. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1404.

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A low-temperature precursor sulfuration route has been established to prepare metal sulfides with different nanostructures during the synthesis of nickel sulfide. The advantages of the low-temperature precursor sulfuration route were testified by the synthesis of different metal sulfides ( lead sulfide, zinc sulfide and cobalt sulfide). It offers a novel path to the preparation of other metal sulfides.
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Brierley, Corale L. "Biohydrometallurgy: What is its Future?" Advanced Materials Research 71-73 (maj 2009): 3–10. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.3.

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Bioleaching/minerals biooxidation and bioremediation have been widely used commercially for heap/dump bioleaching of secondary copper sulfide ores, sulfidic-refractory gold concentrates and treatment of acid rock drainage. Technical and commercial challenges, identified in this paper, remain for bioleaching of primary sulfides and complex ores. New frontiers for the technology exist in processing massive sulfides, silicate-locked minerals and in the more distant future in-situ leaching. Decommissioning of cyanide heap leach operations and stabilizing mine wastes using biotechnology are opportunities requiring intensive and focused research, development and engineering efforts.
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Kharaev, A. M., R. Ch Bazheva i A. S. Borodulin. "Halogenated polyethersulfone sulfides". E3S Web of Conferences 413 (2023): 02038. http://dx.doi.org/10.1051/e3sconf/202341302038.

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This paper presents the results of a study of random copolyethersulfone sulfides based on 4,4-dichlorodiphenylsulfone, 1,1-dichloro-2,2-di(4-hydroxyphenyl)ethylene, and sodium sulfide. The synthesis of copolyethersulfone sulfides with different ratios of polyethersulfone and polyphenylenesulfone sulfide units was carried out by high-temperature polycondensation by the reaction of nucleophilic substitution in N,N-dimethylacetamide medium and using potassium carbonate as an alkaline agent. The effect of the solvent used on the yield and reduced viscosity of polyethersulfone sulfides was studied. It has been shown that polymers with high reduced viscosity can be obtained in N,N-dimethylacetamide and N,N-dimethylformamide. The growth dynamics of the reduced viscosity of polyethersulfone sulfides was also studied depending on the ratio of sulfone and sulfide groups. The solubility of these polymers in various solvents has been studied.
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Wu, Caowei, Changchun Zou, Cheng Peng, Yang Liu, Tao Wu, Jianping Zhou i Chunhui Tao. "Numerical Simulation Study on the Relationships between Mineralized Structures and Induced Polarization Properties of Seafloor Polymetallic Sulfide Rocks". Minerals 12, nr 9 (17.09.2022): 1172. http://dx.doi.org/10.3390/min12091172.

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The induced polarization (IP) method plays an important role in the detection of seafloor polymetallic sulfide deposits. Numerical simulations based on the Poisson–Nernst–Planck equation and the Maxwell equation were performed. The effects of mineralized structures on the IP and electrical conductivity properties of seafloor sulfide-bearing rocks were investigated. The results show that total chargeability increases linearly as the volume content of disseminated metal sulfides increases when the volume content is below 20%. However, total chargeability increases nonlinearly with increasing volume content in vein and massive metal sulfides when the volume content is below 30%. The electrical resistivity of disseminated metal sulfides mainly depends on the conductivity of pore water. The electrical resistivity of vein and massive sulfides mainly depends on the volume content and the length of sulfides. Increase in the aspect ratio (0.36 to 0.93) of seafloor massive sulfides causes relaxation time constants and total chargeability to decrease. Relaxation time constants and total chargeability also decrease with increase in the tortuosity of seafloor vein sulfides from 1.0 to 1.38. This study is of great value for the electrical survey of seafloor polymetallic sulfide deposits.
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Lu, Xian Zhong, Run Wu, Ping Liu i Hai Tao Wu. "Sulfides Precipitation during Transformation of a High Sulfur Alloy Steel". Advanced Materials Research 652-654 (styczeń 2013): 958–62. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.958.

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The morphology of sulfide and abrasive resistance of a high sulfur alloy steel cast at different cooling rate were investigated in this paper. The size, volume fraction and distribution of sulfides was decreased as the solidification rate was increased. After heat treatment, many spherical sulfide were found. Most of sulfides within grains were Cr2MnS4, while sulfides at grain boundaries were mainly FeS. High sulfur alloy steel had strong abrasive resistance.
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Sato, Tomohiro, Shuhei Ishikawa, Kenichi Saitoh, Masanori Takuma i Yoshimasa Takahashi. "Evaluation of Sulfides as Solid Lubricant: Lubricity of Compounded Sulfides". Key Engineering Materials 901 (8.10.2021): 164–69. http://dx.doi.org/10.4028/www.scientific.net/kem.901.164.

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Sulfide was used as solid lubricant, and MoS2 was popular. It was used industry as powder shape. Sulfur as oil additive; ZDDP, MoTDC were also well known. These composites make tribofilm which prevent seizure, scoring and some tribological troubles. In this paper, sulfides were synthesized by powder metallurgy technics. In addition, these sulfides were mixed with bronze powders and sintered as cylindrical specimen. As a result of the friction test in the lubricated condition, tribofilm were covered with specimen surface. By XPS observation, sulfides and oxides were detected on the specimen surface. In the test, additive was not contained in the lubricant because PAO as base oil was adapted. However, sulfide in the specimen affect the making the tribofilm, especially when bornite (Cu5FeS4) was used.
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Wentrup, Curt, i Peter Kambouris. "N-Sulfides. Dinitrogen sulfide, thiofulminic acid, and nitrile sulfides". Chemical Reviews 91, nr 3 (maj 1991): 363–73. http://dx.doi.org/10.1021/cr00003a004.

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Rozprawy doktorskie na temat "Sulfides"

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Jikei, Mitsutoshi. "Formation kinetics of polyarylene sulfides /". Electronic version of summary, 1993. http://www.wul.waseda.ac.jp/gakui/gaiyo/.pdf.

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Manolopoulos, Helen. "Metal sulfides in oxidizing freshwater systems /". *McMaster only, 2001.

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Ratmann, Cristiane Wienke Raubach. "Metal sulfides: photoluminescence and photocatalytic properties". Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/6279.

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Universidade Federal de Minas Gerais
In this work we report an experimental and theoretical study of photoluminescence (PL) and photocatalytic activity of pure metal sulfides and systems furnished prepared by microwave assisted solvothermal (MAS) method. The theoretical model of the decorated system was created in order to analyze the electronic transition, especially in their interfaces. The results show that the system interface decorated (core-shell) produces an electron charge transfer of holes from cadmium sulfide (CdS) to zinc sulfide (ZnS), which helps increase the PL and photocatalytic activity of the system. For the pure systems, was observed the efficacy of the method synthesis employed verified that the process for obtaining the ZnS and calcium sulfide (CaS) was extremely important. Through the theoretical models was possible to evaluate the influence caused by the solvothermal influence caused by the MAS method. The variation in the synthesis parameters shows a direct influence on the PL properties of sulfides obtained which can be attributed to structural organization. The theoretical results how this order and disorder of the system can affect these properties of the obtained materials.
Neste trabalho relata-se um estudo teórico e experimental da atividade fotoluminescente (FL) e fotocatalítica de sulfetos metálicos puros e em sistemas decorados preparados por intermédio do método solvotérmico assistido por micro-ondas. O modelo teórico do sistema decorado foi criado de forma a analisar a transição eletrônica, principalmente nas suas interfaces. Os resultados mostram que a interface do sistema decorado (core-shell) produz uma transferência de carga do elétron do sulfeto de cádmio (CdS) para os buracos do sulfeto de zinco (ZnS), o que ajuda a aumentar a atividade fotoluminescente e fotocatalítica do sistema. Para os sistemas puros, observou-se a eficácia do método de síntese empregado, sendo verificado que o processo de obtenção do ZnS e sulfeto de cálcio (CaS) foi de extrema importância. Por intermédio dos modelos teóricos foi possível avaliar a influência causada pelo método. A variação nos parâmetros de síntese mostra uma influência direta nas propriedades FL dos sulfetos obtidos que pode ser atribuída a organização estrutural. O modelo teórico mostra como essa ordem e desordem do sistema podem afetar essas propriedades dos materiais obtidos.
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Stani´c, Vesha. "Sol-gel processing of metal sulfides". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21641.pdf.

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Senior, James Daniel. "Atropisomerism in biaryl sulfides and sulfones". Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498670.

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The thesis describes research carried out on the synthesis and asymmetric synthesis of atropisomeric biaryl sulfides and sulfones. Chapter one describes synthetic strategies employed in the synthesis of biaryl sulfides and sulfones. A synthetic route that allowed the incorporation ortho substituents of various sizes and the effect of these substitution patterns on barriers to rotation is described. Research towards more direct routes to compounds with the required substitution pattern is then discussed. Having uncovered suitable substitution patterns to achieve atropisomerism in biaryl sulfides and sulfones chapter two goes on to describe methods attempted in the asymmetric synthesis of these compounds. The strategies described include asymmetric cross coupling, kinetic resolution and the use of sulfoxide auxiliaries for dynamic thermodynamic resolution of biaryl sulfones. The first example of an symmetric synthesis of an atropisomeric biaryl sulfone is reported. Chapter three outlines possible applications of biaryl sulfides and sulfones and the synthesis of bis-phosphines based on the biaryl sulfone background using methods described in chapter one.
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Stephens, Ifan Erfyl Lester. "Polysulfide electrocatalysis at transition metal sulfides". Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608910.

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Ramasamy, Karthik. "New molecular precursors for metal sulfides". Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/new-molecular-precursors-for-metal-sulfides(49bcd8c0-4a37-4eb1-892e-7a7973f8f3cd).html.

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Metal sulfide thin films are important class of materials which have applications in photovoltaics, microelectronics and displays. Chemical vapour deposition (CVD) is well known method for the deposition of high quality thin films. Very few classes of single source precursors (eg: dithiocarbamates, xanthates) were successful for the deposition of good quality metal sulfide films by MOCVD. This limited choice was due to the difficulties of finding precursors with suitable physico-chemical properties. Hence, it is important to develop precursors with suitable volatility, solubility and being able to deposit films with little or no contamination. This work describes the synthesis of a series of metal (Fe, Co, Ni, Zn, Cd) complexes of thio- and dithio-biuret ligands, their structural and spectroscopic characterization and thermal decomposition. The complexes were used as single source precursors for the deposition of iron, cobalt, nickel, zinc, cadmium and zinc cadmium sulfide thin films by AACVD. The effect of alkyl groups, coordinating atoms, deposition temperatures on phases and morphology of the films were studied. The deposited films were characterised by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and atomic force microscopy (AFM). The complex [Fe(SON(CNiPr2)2)3] gave hexagonal troilite FeS films with small amount of tetragonal pyrrhotites Fe1-xS at 300 °C, whereas only troilite FeS was deposited at 350, 400 or 450 °C. Complexes [Fe2(µ-OMe)2 (SON(CNEt2)2)2] and [Fe(SON(CNEt2)2)3] deposited a mixture of hexagonal troilite FeS and cubic pyrite FeS2 films at all temperatures. [Fe(SON(CNMe2)2)3] deposited very thin films of FeS at all temperatures as troilite. Complexes [Co(N(SCNMe2)2)3] and [Co(N(SCNEt2)2)3] deposited hexagonal Co1-xS films at all temperatures of 350-500 °C, whereas [Co(SON(CNiPr2)2)2] gave mixture of cubic and hexagonal Co4S3 films at 280-400 °C. Thiobiuret complex [Ni(SON(CNMe2)2)2] gave orthorhombic Ni7S6. Complexes [Ni(SON(CNMe2CNEt2))2] and [Ni(SON(CNEt2)2)2] gave mixtures of hexagonal Ni17S18 and orthorhombic Ni7S6. In contrast, [Ni(SON(CNiPr2)2)2] gave orthorhombic Ni9S8. Dithiobiuret complexes [Ni(N(SCNMe2SCNEt2))2] and [Ni(N(SCNEt2)2)2] gave hexagonal NiS1.03 at 360 and 400 °C, orthorhombic Ni7S6 phase at 440 and 480 °C. The zinc complexes [Zn(N(SCNMe2)2)2] and [Zn(SON(CNiPr2)2)2] deposited cubic ZnS at 300 and 350 °C, whereas at 400 and 450 °C hexagonal ZnS were apparent [Zn(N(SCNEt2)2)2] gave hexagonal ZnS films at all deposition temperatures. Cadmium complexes [Cd(N(SCNMe2)2)2], [Cd(N(SCNEt2)2)2] and [Cd(SON(CNiPr2)2)2] gave hexagonal CdS films at all deposition temperatures.
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Eghbali, Nicolas Dara. "The chemistry of novel cyclic diesters : dialkoxy disulfide, thionosulfite and carbonate". Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103380.

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The synthesis and chemistry of some new cyclic diesters were investigated. The first part of the thesis is concerned with the study of new cyclic diesters derived from thiosulfurous acid, namely cyclic dialkoxy disulfides and their structural thionosulfite isomers. The second part focuses on the development of a new methodology for the synthesis of cyclic carbonates (carbonic acid diesters).
The synthesis of new cyclic dialkoxy-disulfides is described in Chapter 3. Five new molecules have been synthesized and fully characterized. An X-ray structure was obtained for the 2,3-furandimethylene dialkoxy disulfide. The substrates were prepared in an attempt to rationalize some of the existing limitations of the synthetic methodology.
The relationship and possible interconversion between the newly prepared cyclic dialkoxy disulfides and their structural thionosulfite isomers were investigated. Benzene dimethanoate disulfide was successfully converted to its structural thionosulfite isomer under acidic conditions. Further investigations show the existence of a reversible sulfur extrusion process between thionosulfite and sulfoxylate. This sequential transformation brings the first chemical demonstration that branched bond sulfur can indeed be involved in sulfur extrusion as was first predicted by Foss in 1950.
Finally, a highly efficient method to convert alkenes and CO2 into cyclic carbonates directly in water is presented in the second part of the thesis. Using N-bromosuccinimide (NBS) together with 1,8-diazabicyclo [5,4,0] undec-7-ene (DBU) in water, alkenes were converted into cyclic carbonates nearly quantitatively. Cyclic carbonates were also formed efficiently by using a catalytic amount of bromide ion together with aqueous hydrogen peroxide.
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Recatalá, Ferrandis David. "Photoactive Materials Based on Molybdenum Cluster Sulfides". Doctoral thesis, Universitat Jaume I, 2015. http://hdl.handle.net/10803/296561.

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Coordination Chemistry deals with the synthesis and study of the physicochemical properties of metal complexes. Cluster Chemistry is a subfield of Coordination Chemistry, which focuses on the functionalization of complexes in which two or more metal atoms are directly bonded. Over the past few years, Cluster Chemistry has attracted a growing interest among scientists from diverse areas, mainly due to the fascinating properties of these compounds. A historical evolution of the term cluster, as well as an outline of the role of coordinated ligands and structural types in the final properties of metal clusters are provided in Chapter 1.

This PhD Thesis is devoted to the synthesis, characterization and applications of two families of group VI metal clusters containing dithiolene or diimine ligands, as detailed in Chapter 2. The synthetic approaches employed for the preparation of a series of dinuclear M2Q2S2 cluster chalcogenides (M = Mo, W; Q = O, or S) bearing bifunctional dithiolene ligands are described in Chapter 3. These metal clusters present great potential for the design of heterometallic systems.

Chapter 4 is concerned with the preparation of an extensive family of mixed-ligand diimine-halide (or diimine-dithiolene) trinuclear molybdenum sulfides based on the Mo3S7 core. A great number of bipyridine and phenanthroline derivatives have been coordinated to these Mo3S7 units. The most important feature of the resulting cluster complexes of formula Mo3S7X4(diimine), where X = Cl, or Br, is their crystallization as [Mo3S7X4(diimine)·X]- aggregates, in which the sulfur axial atoms participate in non-bonding interactions with halide anions.

The physicochemical properties of both series of metal clusters mentioned above are explored in Chapters 5 and 6. The luminescence properties of bis(dithiolene) M2Q2S2 clusters (M = Mo, W; Q = O, or S), together with those of Mo3S7 clusters functionalized with imidazophenanthroline ligands are detailed in Chapter 5. These diimine Mo3S7 complexes exhibit luminescent anion sensing behavior. The optical limiting capabilities of both series of compounds, namely M2Q2S2- and Mo3S7-based clusters, are also described in Chapter 5 with the aim of finding correlations between molecular structures and third-order nonlinear optical functions.

Chapter 6 examines the electro- and photocatalytic activity of diimine Mo3S7 clusters immobilized on TiO2 nanoparticles toward the hydrogen evolution reaction. This study has been stimulated by the analogy between the structure of Mo3S7 and the catalytic active sites of MoS2 nanoparticles. The electrochemical properties of these TiO2 electrodes are assessed in two different media, that is, aqueous perchloric acid and sulfide-sulfite mixtures. The role of the diimine ligands in the adsorption process is also described in this Chapter.

All experimental procedures employed in this work, together with the characterization of all compounds are presented in Chapter 7. Finally, the general conclusions of this PhD Thesis are provided in Chapter 8.

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Zuo, Yong. "Nanostructured Metal Sulfides for Electrochemical Energy Conversion". Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670925.

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Storing the fluctuating renewable energy into synthetic fuels or in batteries is meaningful due to the emerging energy crisis. In this thesis, four nanostructured catalysts based on two kinds of metal sulfides, namely Cu2S and SnS2, were produced and optimized to improve their performance towards three key electrochemical energy conversion processes, namely electrochemical oxygen evolution, photoelectrochemical water splitting and lithium-ion batteries. Chapter 1 presented a general introduction to explain the motivation of the thesis topic. In chapter 2, a metallic copper substrate was used as current collector and chemical template to produce Cu2S nanorod arrays for electrochemical oxygen evolution reaction (OER). Suitable characterization tools were applied to investigate the chemical, structural and morphological transformation in OER operation, during which the initial Cu2S nanorod arrays would perform as a “pre-catalyst” that in-situ changed to CuO nanowires. Notably, the Cu2S-derived CuO showed significant improved OER performance compared with that of CuO prepared by directly annealing a Cu(OH)2 precursor, in terms of both activity and stability. Thus obtained electrocatalyst can be ranked among the best Cu-based OER catalysts reported so far. To take advantage of the unlimited solar energy, an ultrathin SnS2 NPL with a suitable band gap around 2.2 eV was produced via a hot-injection solution-based process in chapter 3. The unsatisfied photoelectrochemical (PEC) performance of bare SnS2 motivated me to deposit Pt NPs on its surface as cocatalyst via in-situ reduction of a Pt salt. The resulting SnS2-Pt heterostructures with optimal Pt amount showed significant improvement (six fold) towards PEC water oxidation. Mott-Schottky analysis and PEC impedance spectroscopy (PEIS) were used to analyze in more detail the effect of Pt on the PEC performance. The optimal SnS2-Pt heterostructure presented acceptable performance towards PEC water splitting. However, it still suffered from a moderate stability due to the peel-off of the catalyst layer from the FTO surface. To solve this problem, in chapter 4 we detailed a simple, versatile and scalable amine/thiol- based molecular ink to grow nanostructured SnS2 layers directly on conductive substrates such as FTO, stainless steel and carbon cloth. Such layers on FTO were characterized by excellent photocurrent densities. The same strategy was used to produce SnS2-graphene composites, SnS2-xSex ternary coatings and even phase pure SnSe2 layers. Finally, the potential of this precursor ink to produce gram scale amounts of unsupported SnS2 was also investigated. Apart from the application as a photocatalyst, SnS2 can also be a promising anode material for Li-ion batteries (LIB). In chapter 5, nanostructured SnS2 with different morphologies produced in chapter 3 were tested as LIB anodes firstly to find that thin SnS2 NPLs provided the highest performance. Thereafter, a colloidal synthesis strategy to grow the same SnS2 NPLs within a matrix of porous g-C3N4 (CN) and graphite plates (GPs) was developed and the obtained materials were tested for LIB application. Such hierarchical SnS2/CN/GP composites using SnS2-NPL as active materials, porous CN to provide avenues for electrolyte diffusion and ease the volumetric expansion of SnS2, and GP as “highways” for charge transport displayed excellent rate capabilities (536.5 mAh g-1 at 2.0 A g-1) and an outstanding stability (~99.7 % retention after 400 cycles), which were partially associated with a high pseudocapacitance contribution (88.8 % at 1.0 mV s-1). The excellent electrochemical properties of these nanocomposites were ascribed to the synergy created between the three components. Overall, four nanostructured catalysts based on Cu2S and SnS2 were prepared, and proper optimizations/treatments were defined to improve their catalytic performance. The results shown in this thesis demonstrate the promising application of non-toxic, low cost metal sulfides in electrochemical energy conversion technologies.
En esta tesis, se produjeron y optimizaron cuatro catalizadores nanoestructurados basados en Cu2S y SnS2 para mejorar su rendimiento hacia la conversión de energía electroquímica. El Capítulo 1 presentó una introducción general para explicar la motivación del tema de tesis. En el capítulo 2, las matrices de las nanovarillas de Cu2S se sintetizaron in situ sobre un sustrato de cobre metálico para la reacción electroquímica de evolución de oxígeno (OER). Se aplicaron herramientas de caracterización adecuadas para investigar la transformación en la operación OER, durante la cual las matrices iniciales de las nanovarillas Cu2S in situ cambió a nanohilos de CuO. En particular, el CuO derivado de Cu2S mostró un rendimiento de OER significativamente mejor cuando comparado al de CuO preparado mediante el recocido. En el capítulo 3, se detalló un proceso basado en una solución de inyección en caliente para producir nanoplacas ultrafinas SnS2 (NPL). Posteriormente, se cultivóPt en su superficie mediante la reducción in situ de una sal de Pt. Posteriormente se probó el rendimiento fotoelectroquímico (PEC) de los fotoanodes hacia la oxidación del agua. Los fotoanodes de SnS2-Pt optimizados proporcionaron densidades de fotocorriente significativamente más altas que el SnS2 desnudo (seis veces). Se analizó el efecto de Pt. En el capítulo 4, se informó una tinta molecular simple para cultivar capas de SnS2 nanoestructuradas directamente sobre sustratos conductores. Tales capas nanoestructuradas en FTO se caracterizaron por excelentes densidades de fotocorriente. Se utilize la misma estrategia para producir compuestos de grafeno-SnS2, recubrimientos ternarios SnS2-xSex, capas de SnSe2 de fase pura e incluso polvo de SnS2 a gran escala. En el capítulo 5, el SnS2 nanoestructurado con diferentes morfologías se probaron como ánodos LIB en primer lugar para encontrar que los NPL de SnS2 delgados proporcionaban el mayor rendimiento. Posteriormente, se desarrolló una estrategia de síntesis coloidal para cultivar los mismos NPL de SnS2 dentro de una matriz de g-C3N4 (CN) poroso y placas de grafito (GP) y se probaron para la aplicación LIB. Tales compuestos jerárquicos SnS2/CN/GP mostraron excelentes propiedades electroquímicas, lo que se atribuye a la sinergia creada entre los tres componentes como se investigó.
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Książki na temat "Sulfides"

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lantbruksuniversitet, Sveriges, red. On the adsorption of alkylxanthate ions on sulfide mineral and synthetic metal sulfide surfaces. Uppsala: Swedish University of Agricultural Sciences, Dept. of Chemistry, Group of Inorganic and Physical Chemistry, 1990.

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D, Mah Alla, i Watson S. W, red. Thermodynamic properties of sulfides. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1987.

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Hydro-Sulfides 2004 ( 2004 Santiago, Chile). Hydro-Sulfides 2004: International colloquium on hydrometallurgical processing of copper sulfides. Santiago: Departamento Ingenieria de Minas, Universidad de Chile, 2004.

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Donati, Edgardo R., i Wolfgang Sand, red. Microbial Processing of Metal Sulfides. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/1-4020-5589-7.

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Eisenmann, B., i H. Schäfer. Sulfides, Selenides, Tellurides (Part 1). Redaktorzy K. H. Hellwege i A. M. Hellwege. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/b19991.

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Hellwege, K. H., i A. M. Hellwege, red. Sulfides, Selenides, Tellurides (Part 2). Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/b32266.

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Chanturiia, V. A. Ėkologicheskie i tekhnologicheskie problemy pererabotki tekhnogennogo sulʹfidsoderzhashchego syrʹi︠a︡ =: Ecological and Technological Challenges in Processing of Technogenic Sulphidebearing Raw Materials. Apatity: Kolʹskiĭ nauch. t︠s︡entr RAN, 2005.

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Sadovnikov, Stanislav I., Andrey A. Rempel i Aleksandr I. Gusev. Nanostructured Lead, Cadmium, and Silver Sulfides. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-56387-9.

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A, Shaw Christopher, i Geological Survey (U.S.), red. Reliability of [delta]D and [delta]p18sO values of inclusion fluids from sulfides. [Denver, CO?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1987.

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A, Shaw Christopher, i Geological Survey (U.S.), red. Reliability of [delta]D and [delta]℗£ı́O values of inclusion fluids from sulfides. [Denver, CO?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1987.

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Części książek na temat "Sulfides"

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Evarestov, R. A. "Sulfides". W Theoretical Modeling of Inorganic Nanostructures, 611–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44581-5_9.

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Okrusch, Martin, i Hartwig E. Frimmel. "Sulfides, Arsenides and Complex Sulfides (Sulfosalts)". W Springer Textbooks in Earth Sciences, Geography and Environment, 87–104. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-57316-7_5.

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Wold, Aaron, i Kirby Dwight. "Binary Sulfides". W Solid State Chemistry, 171–97. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1476-9_10.

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Towl, A. D. C. "With Sulfides". W Inorganic Reactions and Methods, 161–64. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145159.ch101.

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Towl, A. D. C. "With Sulfides". W Inorganic Reactions and Methods, 174. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145159.ch113.

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Böttcher, P. "Of Sulfides". W Inorganic Reactions and Methods, 336–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145197.ch252.

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Satgé, J., i P. Rivière. "From Sulfides". W Inorganic Reactions and Methods, 39. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145234.ch28.

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Mathiasch, B. "From Sulfides". W Inorganic Reactions and Methods, 75. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145234.ch45.

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Dräger, M., i N. Kleiner. "From Sulfides". W Inorganic Reactions and Methods, 97–98. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145234.ch64.

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Morss, Lester R. "From Sulfides". W Inorganic Reactions and Methods, 5–6. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145296.ch2.

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Streszczenia konferencji na temat "Sulfides"

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Shestakova, Victoria. "Gold in sulfides of quartzed rocks in Ivdelsky placer area". W Проблемы минералогии, петрографии и металлогении. Научные чтения памяти П. Н. Чирвинского. ПЕРМСКИЙ ГОСУДАРСТВЕННЫЙ НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ, 2022. http://dx.doi.org/10.17072/chirvinsky.2022.294.

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The forms of gold occurrence in the sulfides of the Ivdelsky district (the Northern Urals) are considered. The results of electron microscopic examination of a quartz rock sample with sulfide inclusions are presented.
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Au Yong, Hin Cheong, Kortney Tooker, Khanh Van Pham, Richard Arriaga i Amir Mahmoudkhani. "Multifunctional Biosurfactants with Unusual pH Sensitive Interfacial Behavior for Remediation of Iron and Zinc Sulfide Formation Damage". W SPE International Conference on Oilfield Chemistry. SPE, 2023. http://dx.doi.org/10.2118/213799-ms.

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Abstract Metal sulfide scales are found in several fields in onshore and offshore oil and gas wells around the world. Although there has been some success in the development of sulfide scale inhibitors, significantly high concentration of inhibitor is often required specially to mitigate zinc sulfide. Microbial biosurfactants have an inherent affinity towards different mineral surfaces including sulfides. The unique surface and interfacial properties of these naturally derived products make them potential candidates for development of new products for metal sulfide scale management and control. In this work the properties of sophorolipids and rhamnolipids as dispersion and modification agents for iron and zinc sulfide precipitates were investigated. Surface and interfacial tension behaviors of microbial biosurfactants were measured using a drop shape tensiometer. Accelerated dispersion stability testing were used to determine the efficiency of biosurfactants for dispersing field collected and lab-made iron and zinc sulfides. Fourier transform – infrared (FTIR) and ultraviolet – visible (UV-vis) spectroscopy was used to determine the mode of interaction of the biosurfactant active sites with metal sulfide surfaces.
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Harris, William M., Jeffrey J. Lombardo, George J. Nelson, Wilson K. S. Chiu, Barry Lai, Steve Wang, Joan Vila-Comamala, Mingfei Liu i Meilin Liu. "Examining Effects of Sulfur Poisoning on Ni/YSZ Solid Oxide Fuel Cell Anodes Using Synchrotron-Based X-Ray Imaging Techniques". W ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63972.

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Fuel flexibility is widely considered one of the most significant advantages of solid oxide fuel cells (SOFC). However, the presence of small amounts of sulfur or other impurities in the gas stream can have a serious impact on cell performance [1–10]. Under certain conditions, hydrogen sulfide (H2S), even at the ppm level, can lead to the formation of bulk nickel-sulfides within the conventional Ni–yttria-stabilized zirconia (Ni-YSZ) anode of SOFC’s [9]. Understanding the distribution of these sulfides is critical to describing their effects on the electrochemical activity of the cell.
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Nakai, M., Y. Murata, M. Morinaga i R. Hashizume. "Dependence of High-Temperature Steam Oxidation Resistance on the Stability of the Chromium Sulfide in High-Chromium Heat-Resistant Steels". W AM-EPRI 2004, redaktorzy R. Viswanathan, D. Gandy i K. Coleman. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.am-epri-2004p0420.

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Abstract The presence of sulfur at an impurity level in heat resistant steels could improve remarkably the steam oxidation resistance. As is well known, sulfur tends to form sulfides, in particular, chromium sulfides when the steel contains chromium. Therefore, there are two possibilities of sulfur states in the steel. One is in atomic sulfur state as a solid solution, and the other is in sulfide state as a precipitate. However, it still remains unclear which sulfur state contributes largely to the improvement of the steam oxidation resistance of the steels. In order to elucidate the sulfur state operated more effectively in improving the oxidation resistance, the steam oxidation resistance was investigated with high chromium ferritic steels, Fe-10mass%Cr-0.08mass%C-(0~0.015)mass%S, with controlling the sulfur states in them by proper heat treatments. From a series of experiments, it was found that the sulfide state played a more important role in improving the steam oxidation resistance than the atomic sulfur state. Furthermore, this sulfur effect worked significantly in the steam oxidation test performed at the temperatures above 873K which corresponded to the temperature for the chromium sulfide to dissolve and instead for the chromium oxide to form in the steels. This result indicates that the beneficial effect of sulfur in improving the steam oxidation resistance is related closely to the sulfide stability against the oxide in the steels.
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WANG, Kaifeng, Alejandro Fernandez-Martinez, Bin MA, Laurent Charlet, Benoit MADE, Pierre Henocq i Laura Simonelli. "Selenite interactions with iron sulfides". W Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6201.

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Hannington, Mark D., John Jamieson i Sven Petersen. "Seafloor massive sulfide deposits: Continuing efforts toward a global estimate of seafloor massive sulfides". W OCEANS 2015 - Genova. IEEE, 2015. http://dx.doi.org/10.1109/oceans-genova.2015.7271526.

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Nakajima, Yasuharu, Joji Yamamoto, Tomoko Takahashi, Blair Thornton, Yuta Yamabe, Gjergj Dodbiba i Toyohisa Fujita. "Development of Elemental Technologies for Seafloor Mineral Processing of Seafloor Massive Sulfides". W ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96040.

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Abstract Seafloor Massive Sulfides have been expected to be future mineral resources. The grade of valuable metallic elements in ores of Seafloor Massive Sulfides is usually small percentage. If valuable minerals can be extracted from the ores on deep seafloor, the total mining cost can be reduced significantly. The authors proposed Seafloor Mineral Processing, where ores are to be ground into fine particles and separated into concentrates and tailings on seafloor. The Seafloor Mineral Processing system consists of processing units for unit operations such as grinding and separation. To investigate the applicability of flotation, which is a method to separate ore particles by using the difference in wettability of minerals, to the separation unit, measurements of contact angles of sulfide minerals at high pressures were carried out. The results suggested that the contact angles of the minerals would have relationships with pressure in depending on the kind of minerals and solutions. In addition, applying Laser-Induced breakdown Spectroscopy (LIBS), an optical method for elemental analysis, to measurement of metal grade of ore particles handled as slurry in the processing units was also investigated. Signals assigned to copper, zinc, and lead were successfully detected in the spectra obtained from ore particles in slurry flow.
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Mashukov, Anatoly. "VARIATIONS�OF�THE�NATURAL�SULFIDES�COMPOSITION". W SGEM2012 12th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2012. http://dx.doi.org/10.5593/sgem2012/s01.v1046.

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Monçalves, Matias, Mariana M. Bassaco, Marcos A. Villetti i Claudio C. Silveira. "Novel Divinyl Sulfides: Potential Luminescent Compounds". W 14th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0308-1.

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White, William B. "Refractory sulfides as IR window materials". W San Dieg - DL Tentative, redaktor Paul Klocek. SPIE, 1990. http://dx.doi.org/10.1117/12.22484.

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Raporty organizacyjne na temat "Sulfides"

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Propp, W. A., T. E. Carleson, C. M. Wai i S. Huang. Transport of metal sulfides in supercritical carbon dioxide. Office of Scientific and Technical Information (OSTI), maj 1996. http://dx.doi.org/10.2172/274142.

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Tossell, John A. Theoretical Studies on Heavy Metal Sulfides in Solution. Office of Scientific and Technical Information (OSTI), październik 2007. http://dx.doi.org/10.2172/1028651.

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Cawood, T. K., M. J. Polivchuk i J. M. Peter. Electron Backscatter Diffraction Data for Sulfides from the Windy Craggy Volcanogenic Massive Sulfide Deposit, NW British Columbia, Canada. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/p1p7x06dgb.

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Kamil Klier, Jeffery A. Spirko i Michael L. Neiman. Modeling of Syngas Reactions and Hydrogen Generation Over Sulfides. Office of Scientific and Technical Information (OSTI), wrzesień 2002. http://dx.doi.org/10.2172/903345.

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Kamil Klier, Jeffery A. Spirko i Michael L. Neiman. Modeling of Syngas Reactions and Hydrogen Generation Over Sulfides. Office of Scientific and Technical Information (OSTI), wrzesień 2003. http://dx.doi.org/10.2172/903346.

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Kamil Klier, Jeffery A. Spirko i Michael L. Neiman. MODELING OF SYNGAS REACTIONS AND HYDROGEN GENERATION OVER SULFIDES. Office of Scientific and Technical Information (OSTI), październik 2004. http://dx.doi.org/10.2172/836407.

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Franzen, H. F. The metal-rich sulfides and phosphides of the early transition metals. Office of Scientific and Technical Information (OSTI), czerwiec 1996. http://dx.doi.org/10.2172/244545.

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Paradis, S., G. J. Simandl, N. Drage, R J D'Souza, D. J. Kontak i Z. Waller. Carbonate-hosted deposits (Mississippi Valley-type, magnesite, and REE-F-Ba) of the southeastern Canadian Cordillera: a review and isotopic data comparison. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/327995.

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The Mississippi Valley-type, magnesite, and REE-F-Ba deposits in the southeastern Canadian Cordillera are in the weakly deformed/metamorphosed Paleozoic carbonate platform of the Rocky Mountains. Most are hosted in dolostones of the middle Cambrian Cathedral, upper Cambrian Jubilee, and Upper Devonian Palliser formations and spatially associated with hydrothermal dolomite. They occur along structurally controlled facies transitions between the shallow-water carbonate platform and deeper water basin rocks of the Paleozoic continental margin. Their location and morphology reflect episodic rifting along the Paleozoic margin. The carbonate protolith was replaced by fine-grained 'replacive dolomite' followed by several stages of coarser saccharoidal, sparry, and saddle dolomites and sulfides replacing dolostone and filling open spaces. The 87Sr/86Sr, delta-18O, delta-13C, and fluid-inclusion data are consistent with high-temperature fluids interacting with host rocks and show influence of adjacent or underlying siliciclastic rocks. The large range of delta-34S values of sulfides suggests that thermochemical sulfate reduction of seawater sulfate was the main sulfur-reducing process, but bacterial sulfate reduction also occurred locally. Lead isotopes suggest a mixing trend involving highly radiogenic and non-radiogenic end members. These observations are consistent with hydrothermal fluids replacing protoliths, precipitating sulfides, and possibly REE-F-Ba mineralization.
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Kanatzidis, Mercouri, Brian Riley i Jaehun Chun. Novel Metal Sulfides to Achieve Effective Capture and Durable Consolidation of Radionuclides. Office of Scientific and Technical Information (OSTI), styczeń 2016. http://dx.doi.org/10.2172/1333915.

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Gadd, M. G., J. M. Peter i D. Layton-Matthews. Genesis of hyper-enriched black shale Ni-Mo-Zn-Pt-Pd-Re mineralization in the northern Canadian Cordillera. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328013.

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Polymetallic (Ni-Mo-Zn-Pt-Pd-Au-Re) hyper-enriched black shales in the northern Canadian Cordillera consist of thin, semi-massive sulfides interbedded with black shale. We studied HEBS deposits at Nick, Peel River, Monster River, and Moss in northern Yukon, and at a single locality underlying the Cardiac Creek Pb-Zn-Ag deposit in northeastern British Columbia. High-grade mineralization contains up to 7.4 weight per cent Ni, 2.7 weight per cent Zn, 0.38 weight per cent Mo, 400 ppb Pt, 250 ppb Pd, 160 ppb Au, and 58.5 ppm Re. Sulfide mineralization formed during syngenesis to later diagenesis. Analyses by LA-ICP-MS indicate that pyrite is the principal host of platinum-group elements, Au, and Re. Mineralization and sedimentation were coeval based on the overlap between Re-Os geochronology of HEBS at Nick and Peel River (390.7 ± 5.1 and 387.3 ± 4.4 Ma, respectively) and conodont biostratigraphic ages of sedimentary host rocks. Bulk S isotope composition of HEBS is uniformly negative, indicating that bacterial reduction of seawater sulfate generated sulfur to precipitate sulfide minerals. The initial Os ratios at Peel River (0.25 ± 0.07) and Nick (0.32 ± 0.20) overlap with Middle Devonian seawater, suggesting that elemental enrichment was derived from seawater.
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