Sulfides: Chemical groups containing the covalent sulfur bonds -S-. The sulfur atom can be bound to inorganic or organic moieties.Allyl CompoundsTransition Elements: Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.Sulfur Compounds: Inorganic or organic compounds that contain sulfur as an integral part of the molecule.Garlic: One of the Liliaceae used as a spice (SPICES) and traditional remedy. It contains alliin lyase and alliin, which is converted by alliin lyase to allicin, the pungent ingredient responsible for the aroma of fresh cut garlic.Hydrothermal Vents: Hot springs on the ocean floor. They are commonly found near volcanically active places such as mid-oceanic ridges.Sulfoxides: Organic compounds that have the general formula R-SO-R. They are obtained by oxidation of mercaptans (analogous to the ketones). (From Hackh's Chemical Dictionary, 4th ed)Iron Compounds: Organic and inorganic compounds that contain iron as an integral part of the molecule.Meteoroids: Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Sulfinic Acids: Any of the monobasic inorganic or organic acids of sulfur with the general formula RSO(OH). (From McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Geologic Sediments: A mass of organic or inorganic solid fragmented material, or the solid fragment itself, that comes from the weathering of rock and is carried by, suspended in, or dropped by air, water, or ice. It refers also to a mass that is accumulated by any other natural agent and that forms in layers on the earth's surface, such as sand, gravel, silt, mud, fill, or loess. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1689)Oxidation-Reduction: A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.Sulfates: Inorganic salts of sulfuric acid.Iron: A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.Stereoisomerism: The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Seawater: The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.Bacteria: One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.

Allyl-containing sulfides in garlic increase uncoupling protein content in brown adipose tissue, and noradrenaline and adrenaline secretion in rats. (1/1610)

The effects of garlic supplementation on triglyceride metabolism were investigated by measurements of the degree of thermogenesis in interscapular brown adipose tissue (IBAT), and noradrenaline and adrenaline secretion in rats fed two types of dietary fat. In Experiment 1, rats were given isoenergetic high-fat diets containing either shortening or lard with or without garlic powder supplementation (8 g/kg of diet). After 28 d feeding, body weight, plasma triglyceride levels and the weights of perirenal adipose tissue and epididymal fat pad were significantly lower in rats fed diets supplemented with garlic powder than in those fed diets without garlic powder. The content of mitochondrial protein and uncoupling protein (UCP) in IBAT, and urinary noradrenaline and adrenaline excretion were significantly greater in rats fed a lard diet with garlic powder than in those fed the same diet without garlic. Other than adrenaline secretion, differences due to garlic were significant in rats fed shortening, also. In Experiment 2, the effects of various allyl-containing sulfides present in garlic on noradrenaline and adrenaline secretion were evaluated. Administration of diallyldisulfide, diallyltrisulfide and alliin, organosulfur compounds present in garlic, significantly increased plasma noradrenaline and adrenaline concentrations, whereas the administration of disulfides without allyl residues, diallylmonosulfide and S-allyl-L-cysteine did not increase adrenaline secretion. These results suggest that in rats, allyl-containing sulfides in garlic enhance thermogenesis by increasing UCP content in IBAT, and noradrenaline and adrenaline secretion.  (+info)

Nitrate removal in closed-system aquaculture by columnar denitrification. (2/1610)

The columnar denitrification method of nitrate-nitrogen removal from high-density, closed system, salmonid aquaculture was investigated and found to be feasible. However, adequate chemical monitoring was found to be necessary for the optimization and quality control of this method. When methanol-carbon was not balanced with inlet nitrate-nitrogen, the column effluent became unsatisfactory for closed-system fish culture due to the presence of excess amounts of nitrite, ammonia, sulfide, and dissolved organic carbon. Sulfide production was also influenced by column maturity and residence time. Methane-carbon was found to be unsatisfactory as an exogenous carbon source. Endogenous carbon could not support high removal efficiencies. Freshwater columns adpated readily to an artificial seawater with a salinity of 18% without observable inhibition. Scanning electron microscopy revealed that the bacterial flora was mainly rod forms with the Peritricha (protozoa) dominating as the primary consumers. Denitrifying bacteria isolated from freshwater columns were tentatively identified as species of Pseudomonas and Alcaligenes. A pilot plant column was found to behave in a manner similar to the laboratory columns except that nitrite production was never observed.  (+info)

Dense populations of a giant sulfur bacterium in Namibian shelf sediments. (3/1610)

A previously unknown giant sulfur bacterium is abundant in sediments underlying the oxygen minimum zone of the Benguela Current upwelling system. The bacterium has a spherical cell that exceeds by up to 100-fold the biovolume of the largest known prokaryotes. On the basis of 16S ribosomal DNA sequence data, these bacteria are closely related to the marine filamentous sulfur bacteria Thioploca, abundant in the upwelling area off Chile and Peru. Similar to Thioploca, the giant bacteria oxidize sulfide with nitrate that is accumulated to +info)

Tetradecylthioacetic acid (a 3-thia fatty acid) impairs secretion of oleic acid-induced triacylglycerol-rich lipoproteins in CaCo-2 cells. (4/1610)

The fatty acid analogue tetradecylthioacetic acid (TTA) has previously been shown to decrease triacylglycerol secretion in CaCo-2 cells (Gedde-Dahl et al., J. Lipid Res. 36 (1995) 535-543). The present study was designed to further elucidate the effect of TTA on lipoprotein production in CaCo-2 cells. TTA did not affect oleic acid-induced triacylglycerol synthesis, but it significantly decreased secretion of newly synthesized triacylglycerol when compared to cells incubated with oleic acid alone or oleic acid in combination with palmitic acid. In contrast, pulse-chase experiments showed no difference in the amount of labeled triacylglycerol secreted from cells exposed to either fatty acid combination during the chase period, indicating that TTA did not affect the secretory process in general. Cells incubated with TTA alone secreted triacylglycerol present at 1.025+info)

Thiolated recombinant human tumor necrosis factor-alpha protects against Plasmodium berghei K173-induced experimental cerebral malaria in mice. (5/1610)

The introduction of reactive thiol groups in recombinant human tumor necrosis factor (TNF) alpha (rhTNF-alpha) by the reagent succinimidyl-S-acetylthioacetate resulted in the formation of a chemically stabilized rhTNF-alpha trimer (rhTNFalpha-AT; as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis). rhTNFalpha-AT showed a substantially enhanced protective efficacy against the development of experimental murine cerebral malaria (ECM) after intravenous injection compared to the protective efficacy of nonmodified rhTNF-alpha. Administration of thiolated rhTNF-alpha with protected thiol groups (rhTNFalpha-ATA; no stabilized trimers in vitro) exhibited the same protective efficacy against ECM, while in vitro bioactivity was reduced. Parasitemia was significantly suppressed in rhTNF-treated mice that were protected against ECM but not in treated mice that developed ECM. Protection against ECM was not related to increased concentrations in plasma of soluble TNF receptor 1 and 2 directly after injection or at the moment of development of ECM in nontreated mice. The results indicate that thiolation of rhTNF-alpha leads to the formation of stable trimers with increased potential in vivo.  (+info)

A fission yeast gene for mitochondrial sulfide oxidation. (6/1610)

A cadmium-hypersensitive mutant of the fission yeast Schizosaccharomyces pombe was found to accumulate abnormally high levels of sulfide. The gene required for normal regulation of sulfide levels, hmt2(+), was cloned by complementation of the cadmium-hypersensitive phenotype of the mutant. Cell fractionation and immunocytochemistry indicated that HMT2 protein is localized to mitochondria. Sequence analysis revealed homology between HMT2 and sulfide dehydrogenases from photosynthetic bacteria. HMT2 protein, produced in and purified from Escherichia coli, was soluble, bound FAD, and catalyzed the reduction of quinone (coenzyme Q2) by sulfide. HMT2 activity was also detected in isolated fission yeast mitochondria. We propose that HMT2 functions as a sulfide:quinone oxidoreductase. Homologous enzymes may be widespread in higher organisms, as sulfide-oxidizing activities have been described previously in animal mitochondria, and genes of unknown function, but with similarity to hmt2(+), are present in the genomes of flies, worms, rats, mice, and humans.  (+info)

Health aspects of the curing of synthetic rubbers. (7/1610)

A commonly used tread rubber formulation was cured in the laboratory under conditions simulating vulcanization in the Bag-O-Matic press. Volatile emissions were collected on charcoal and analyzed by combined GC-mass spectrometry. The compounds identified were either contaminants present in the raw material or reaction products. Some of these compounds were also identified in charcoal tube samples collected in the atmosphere of the industrial operations. Estimates based on the loss of weight of rubber during curing were used to predict airborne concentrations and compared to the concentrations actually found. The literature of the toxicity of raw materials and effluents was reviewed, and no acute or chronic toxicological effects would be anticipated. Information concerning potential carcinogenicity was not available and could not be evaluated.  (+info)

Novel derivatives of phenethyl-5-bromopyridylthiourea and dihydroalkoxybenzyloxopyrimidine are dual-function spermicides with potent anti-human immunodeficiency virus activity. (8/1610)

Sexually active women represent the fastest growing HIV/AIDS (human immunodeficiency virus/acquired immunodeficiency syndrome) risk group. In an effort to develop a vaginal microbicidal contraceptive potentially capable of preventing HIV transmission as well as providing fertility control, we have synthesized novel non-nucleoside inhibitors (NNIs) of HIV-1 reverse transcriptase (RT) and examined them for dual-function anti-HIV and spermicidal activity. Structure-based drug design by use of a computer docking procedure for the NNI binding pocket generated from nine RT-NNI crystal structures led to the synthesis of three novel NNIs: N-[2-(2, 5-dimethoxyphenethyl)]-N'-[2-(5-bromopyridyl)]-thiourea (D-PBT); N-[2-(2-fluorophenethyl)]-N'-[2-(5-bromopyridyl)]-thiourea (F-PBT); and 5-isopropyl-2-[(methylthiomethyl)thio]-6-(benzyl)-pyrimidin-4-(1H)-on e (S-DABO). The anti-HIV activity of these NNIs was compared with that of trovirdine and virucidal/spermicide, nonoxynol-9 (N-9), by measuring viral RT activity and p24 antigen production as markers of viral replication using HTLVIIIB-infected human peripheral blood mononuclear cells (PBMCs). The effects on sperm motion kinematics and sperm membrane integrity were examined by computer-assisted sperm analysis and by confocal laser scanning microscopy (CLSM), respectively. The growth-inhibitory effects of NNI versus N-9 against normal human ectocervical and endocervical epithelial cells were tested using the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide) assay. All three NNIs were potent inhibitors of purified recombinant HIV RT and abrogated HIV replication in PBMCs at nanomolar concentrations (IC50 < 1 nM) when compared with N-9 or trovirdine (IC50 values of 2.2 microM and 0.007 microM, respectively). Two NNIs, F-PBT and S-DABO, also exhibited concentration- and time-dependent spermicidal activity. The drug concentration required to inhibit sperm motility by 50% (EC50 values) for the lead compound F-PBT versus N-9 was 147 microM and 81 microM, respectively. Sperm-immobilizing activity induced by F-PBT and S-DABO was rapid (t1/2 = 7-13 min) and irreversible. Unlike that of N-9, spermicidal activity of F-PBT and S-DABO was not accompanied by loss of acrosomal membrane as detected by fluorescent-lectin binding assay and CLSM. Whereas N-9 was cytotoxic to normal human ectocervical and endocervical cells at spermicidal doses, both F-PBT and S-DABO were selectively spermicidal. We conclude that as potent anti-HIV agents with spermicidal activity and reduced cytotoxicity, F-PBT and S-DABO show unique clinical potential to become the active ingredients of a vaginal contraceptive for women who are at high risk for acquiring HIV by heterosexual vaginal transmission.  (+info)

*Sulfur assimilation

Sulfates taken up by the roots are the major sulfur source for growth, though it has to be reduced to sulfide before it is ... For instance, hydrogen sulfide exposure may result in a decreased activity of APS reductase and a depressed sulfate uptake. ... Sulfide is incorporated into cysteine, catalyzed by O-acetylserine (thiol)lyase, with O-acetylserine as substrate. The ... This differs from the process in yeast, where sulfide must be incorporated first in homocysteine then converted in two steps to ...

*CI chondrite

Iron is present with 25 weight %, but mainly in oxidised form (magnetite). Iron sulfides like pyrrhotite, pentlandite, troilite ... CI chondrite mineralogy is dominated by a fine-grained phyllosilicate matrix, hosting carbonates, sulfates, sulfides, and ...

*Diallyl trisulfide

DATS can be metabolized by glutathione in red blood cells to form hydrogen sulfide (H2S). This conversion occurs at a ... Heart and Circulatory Physiology, 302 (11): H2410-2418 Lavu, M., Bhushan, S., Lefer, D. (2011) Hydrogen Sulfide-Mediated ... Hydrogen Sulfide Mediates the Vasoactivity of Garlic. Proceedings of the National Academy of Sciences of the United States of ... A major topic of research is the impact of hydrogen sulfide on reducing myocardial ischemia-reperfusion injury. Reperfusion ...

*Dimethyl trisulfide

DMTS can be synthesized by the reaction of methanethiol with hydrogen sulfide (in the presence of copper (II)) and with sulfur ... Dimethyl trisulfide along with dimethyl sulfide and dimethyl disulfide have been confirmed as volatile compounds given off by ... Mustapha Nedjma; Norbert Hoffmann (1996). "Hydrogen Sulfide Reactivity with Thiols in the Presence of Copper(II) in ...

*Iron cycle

... and the abiotic reduction of Fe3+ to Fe2+ by iron-sulfide minerals. The iron cycle can also be facilitated by microorganisms, ...

*Sulfide

... sulfide converts to hydrogen sulfide (H2S) and a metal salt. Oxidation of sulfide gives sulfur or sulfate. Metal sulfides react ... molybdenum sulfide), pentlandite (nickel sulfide), realgar (arsenic sulfide), and stibnite (antimony), sphalerite (zinc sulfide ... When a sulfide burns it produces sulfur dioxide (SO2) gas. Hydrogen sulfide, some of its salts, and almost all organic sulfides ... Sulfide (systematically named sulfanediide, and sulfide(2−)) (British English sulphide) is an inorganic anion of sulfur with ...

*Sulphide, Ontario

Sulphide Creek, a tributary of the Moira River, flows through the community. Founded in 1836, the town was named for a series ... Sulphide is a settlement in the municipality of Tweed, Hastings County, Ontario, Canada, about 4.5 kilometres (2.8 mi) west of ... Today, Sulphide is home to country living, with some of the original private houses re-occupied. Still, there are some ... The name of the town "Sulphide" came from the mineral that gave the town its existence. And it was by accident. A failed gold ...

*Lithium sulfide

In air, it easily hydrolyses to release hydrogen sulfide (rotten egg odor). Lithium sulfide is prepared by treating lithium ... 2 Li + S → Li2S The THF-soluble triethylborane adduct of lithium sulfide can be generated using superhydride. Lithium sulfide ... ISBN 0-7506-3365-4. "Webelements - Lithium Sulfide". Retrieved 2005-09-16. Rankin, D. W. H. (1974). "Digermanyl Sulfide". Inorg ... Lithium sulfide is the inorganic compound with the formula Li2S. It crystallizes in the antifluorite motif, described as the ...

*Triphenylphosphine sulfide

... (IUPAC name: triphenyl-λ5-phosphanethione) is the organophosphorus compound with the formula (C6H5) ... Triphenylphosphine sulfide is useful for the conversion of epoxides to the corresponding episulfides: Ph2C2H2O + Ph3PS → ... Codding, P. W.; Kerr, K. A. (1978). "Triphenylphosphine sulfide". Acta Crystallographica Section B. 34 (12): 3785. doi:10.1107/ ... Mayhew, Darrin L.; Clive, Derrick L. J. (Apr 15, 2001). "Triphenylphosphine Sulfide". Encyclopedia of Reagents for Organic ...

*Potassium sulfide

Other alkali metal sulfides behave similarly. Potassium sulfides are formed when black powder is burned and are important ... Potassium sulfide is the inorganic compound with the formula K2S. The colourless solid is rarely encountered, because it reacts ... Sulfide is highly basic, consequently K2S completely and irreversibly hydrolyzes in water according to the following equation: ... the term potassium sulfide refers loosely to this mixture, not the anhydrous solid. It adopts "antifluorite structure," which ...

*Sulphide Glacier

... descends from 8,600 to 5,600 ft (2,600 to 1,700 m). Sulphide Glacier is along the route taken when Mount ... "Sulphide Basin Falls". Northwest Waterfall Survey. Retrieved April 20, 2013. "Sulphide Creek Falls". Northwest Waterfall Survey ... Below these cascades lies Sulphide Lake, which empties over Sulphide Creek Falls, one of the highest waterfalls in North ... Sulphide Glacier is in North Cascades National Park in the U.S. state of Washington, on the south slopes of Mount Shuksan. ...

*Sulphide Lake

... into Sulphide Lake including Sulphide Basin Falls which is from melt off the Sulphide Glacier. After Sulphide Creek drains from ... Sulphide Lake is located in North Cascades National Park, in the U. S. state of Washington. Sulphide Lake lies in a cirque on ... over a series of cascades called Sulphide Creek Falls, which is one of the tallest waterfalls in the U.S. "Sulphide Lake". ... "Sulphide Creek Falls". Northwest Waterfall Survey. Retrieved June 29, 2013. ...

*Sulphide Creek

At this point, the distance from the confluence to Sulphide Creek Falls is roughly 2 miles (3.2 km). The volume of Sulphide ... Sulphide Lake, then as it flows out of the lake, drops down Sulphide Creek Falls, one of the tallest waterfalls in North ... Sulphide Creek is a 2.5-mile (4.0 km) glacial tributary of the Baker River in Whatcom County in the U.S. state of Washington, ... "Sulphide" is the British English spelling of sulphur, although the origin of the name is unknown. After exiting the glaciers, ...

*Phosphorus sulfide

There are several other phosphorus sulfides in addition to P4S3 and P4S10. Six of these phosphorus sulfides exist as isomers: ... "Transfer of Sulfur from Arsenic and Antimony Sulfides to Phosphorus Sulfides. Rational Syntheses of Several Less-Common P4Sn ... Phosphorus sulfides comprise a family of inorganic compounds containing only phosphorus and sulfur. These compounds have the ... All known molecular phosphorus sulfides contain a tetrahedral array of four phosphorus atoms. P4S2 is also known but is ...

*Copper sulfide

... which consist of mixed copper-iron sulfides, are often referred to as "copper sulfides". In chemistry, a "binary copper sulfide ... Copper sulfides (British English spelling: copper sulphide) describe a family of chemical compounds and minerals with the ... Some copper sulfides are economically important ores. Prominent copper sulfide minerals include Cu2S (chalcocite) and CuS ( ... sulfide Copper(II) sulfide J.C.W. Folmer Holes in the valence band of copper chalcogenides Thesis 1981 Groningen State ...

*Cobalt sulfide

In general, the sulfides of cobalt are black, semiconducting, insoluble in water, and nonstoichiometric. Cobalt sulfides occur ... Cobalt sulfide is the name for chemical compounds with a formula CoxSy. Well-characterized species include minerals with the ... Synthetic cobalt sulfides are widely investigated as electrocatalysts. Congiu, M.; Albano, L. G. S.; Decker, F.; Graeff, C. F. ... Binary cobalt sulfide minerals include the cattierite (CoS2) and linnaeite (Co3S4). CoS2 is isostructural with iron pyrite, ...

*Nickel sulfide

It is a black solid that is produced by treating nickel(II) salts with hydrogen sulfide. Many nickel sulfides are known, ... Nonstoichiometric forms of nickel sulfide are known, e.g., Ni9S8 and Ni3S2. Like many related materials, nickel sulfide adopts ... In this structure, nickel is octahedral and the sulfide centers are in trigonal prismatic sites. Nickel sulfide has two ... "Direct Electrical Measurement of the Conversion of Metal Acetates to Metal Sulfides by Hydrogen Sulfide" Inorg. Chem., 2006, 45 ...

*Silver sulfide

... is insoluble in all solvents, but is degraded by strong acids. Silver sulfide is a network solid made up of ... Silver sulfide (Ag 2S) is the sulfide of silver. It is useful as a photosensitizer in photography. This dense black solid ... When combined with silver, hydrogen sulfide gas creates a layer of black silver sulfide patina on the silver, protecting the ... Degrading wooden treasure chests aboard sunken galleons can provide the sulfide needed for certain sulfide ion consuming ...

*Sulfide minerals

The sulfide minerals are a class of minerals containing sulfide (S2−) as the major anion. Some sulfide minerals are ... Sulfide minerals are inorganic compounds. Common or important examples include: Sulfides: Acanthite Ag2S Chalcocite Cu2S ... Webmineral New Dana Classification of Sulfide Minerals Media related to Sulfides at Wikimedia Commons. ... 10 Patronite 02.F Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O 02.FA With As, (Sb), S: 05 ...

*Hydrogen sulfide

... sulfide, which is black. Treating metal sulfides with strong acid often liberates hydrogen sulfide. At pressures above 90 GPa ( ... Hydrogen sulfide is slightly denser than air; a mixture of H 2S and air can be explosive. Hydrogen sulfide burns in oxygen with ... These metal sulfides, such as ferrous sulfide FeS, are often black or brown, leading to the dark color of sludge. Several ... Hydrogen sulfide is used to separate deuterium oxide, or heavy water, from normal water via the Girdler sulfide process. ...

*Sulfide intrusion

In biology, sulfide intrusion refers to an excess of sulfide molecules in the soil interfering with plant growth, often ... 2009), "Sulfide intrusion in the tropical seagrasses Thalassia testudinum and Syringodium filiforme", Estuarine, Coastal and ... Seagrass bed sediment (soil) is typically anoxic, containing a reduced form of sulfur: hydrogen sulfide (H2S). H2S is a ... For example, bivalves (clams) in the family Lucinidae host symbiotic bacteria that oxidize sulfides. Lucinid bivalves' gills ...

*Aluminium sulfide

Aluminum sulfide or aluminium sulphide is a chemical compound with the formula Al2S3. This colorless species has an interesting ... This can begin when the sulfide is exposed to the atmosphere. The hydrolysis reaction generates gaseous hydrogen sulfide (H2S ... Compressing aluminium sulfide to 2-65 kbar results in the δ phase where vacancies are arranged in a superlattice of tetragonal ... Aluminium sulfide is readily prepared by ignition of the elements 2 Al + 3 S → Al2S3 This reaction is extremely exothermic and ...

*Tetramethylthiuram sulfide

... is an organosulfur compound with the formula ((CH3)2NCS)2S. It is a yellow solid that is soluble in ... It is the parent member of a large class of tetraalkylthiuram sulfides. It is prepared by desulfuration of tetramethylthiuram ... 2NCS subunits joined by a sulfide. The dihedral angle between the subunits is close to 90°. Schubart, Rüdiger (2005), " ...

*Strontium sulfide

As expected for a sulfide salt of alkaline earth, the sulfide hydrolyzes readily: SrS + 2 H2O → Sr(OH)2 + H2S For this reason, ... Strontium sulfide is the inorganic compound with the formula SrS. It is a white solid. The compound is an intermediate in the ... Strontium sulfide is produced by the reduction of the sulfate above 1000 °C: SrSO4 + 2 C → SrS + 2 CO2 About 300,000 tons are ... Strontium sulfide, cameochemicals.noaa.gov J. Paul MacMillan, Jai Won Park, Rolf Gerstenberg, Heinz Wagner, Karl Köhler, Peter ...

*Magnesium sulfide

... is formed, which then floats on the molten iron and is removed. MgS is a wide band-gap direct semiconductor ... Magnesium sulfide is an inorganic compound with the formula MgS. It is a white crystalline material but often is encountered in ... MgS is formed by the reaction of sulfur or hydrogen sulfide with magnesium. It crystallizes in the rock salt structure as its ... The chemical properties of MgS resemble those of related ionic sulfides such as those of sodium, barium, or calcium. It reacts ...
Global Dimethyl sulphide market is expected to reach USD XXXX billion in 2022. Global Dimethyl sulphide market is anticipated to grow at a CAGR of XX.XX % between 2017 and 2022. The Dimethyl sulphide market report covers forecast and analysis for the Dimethyl sulphide market on a global and regional level. The study provides Dimethyl sulphide markets historic data of 2014, 2015 and 2016 along with a forecast from 2017 to 2022 based on Dimethyl sulphide market revenue (USD billion). The Dimethyl sulphide market study includes drivers and restraints of the Dimethyl sulphide market along with the impact they have on the demand over the forecast period. Additionally, the Dimethyl sulphide industry report includes the study of opportunities available in the Dimethyl sulphide market on a global level.. The objective of the Report:. Basically, the report focuses on Dimethyl sulphide in the global market. Report on Dimethyl sulphide market also briefs about the factors altering Dimethyl sulphide market ...
Dimethyl trisulfide (DMTS) is an organic chemical compound and the simplest organic trisulfide. It is a flammable liquid with a foul odor, which is detectable at levels as low as 1 part per trillion. Dimethyl trisulfide has been found in volatiles emitted from cooked onion, leek and other Allium species, from broccoli and cabbage, as well as from Limburger cheese, and is involved in the unpalatable aroma of aged beer and stale Japanese sake. It is a decomposition product of bacterial decomposition, including the early stages of human decomposition, and is a major attractant for blowflies looking for hosts. Dimethyl trisulfide along with dimethyl sulfide and dimethyl disulfide have been confirmed as volatile compounds given off by the fly-attracting plant known as dead-horse arum (Helicodiceros muscivorus). These flies are attracted to the odor of fetid meat and help pollinate this plant. DMTS contributes to the foul odor given off by the fungus Phallus impudicus, also known as the common ...
Looking for Sulfide Mineral? Find out information about Sulfide Mineral. A mineral compound characterized by the linkage of sulfur with a metal or semimetal. any of various minerals comprising a class and consisting of sulfur... Explanation of Sulfide Mineral
Business Directory for Sodium Sulfide Suppliers in Delhi - Get contact details of Sodium Sulfide Manufacturers, Wholesale Sodium Sulfide Exporters, Best Sodium Sulfide Traders & Distributors Across the Delhi.
0027] Suitable organosilane polysulfides include, but are not limited to, 3,3-bis(trimethoxysilylpropyl)disulfide, 3,3-bis(triethoxysilylpropyl)disulfide, 3,3-bis(triethoxysilylpropyl)tetrasulfide, 3,3-bis(triethoxysilylpropyl)octasulfide, 3,3-bis(trimethoxysilylpropyl)tetrasulfide, 2,2-bis(triethoxysilylethyl)tetrasulfide, 3,3-bis(trimethoxysilylpropyl)trisulfide, 3,3-bis(triethoxysilylpropyl)trisulfide, 3,3-bis(tributoxysilylpropyl)disulfide, 3,3-bis(trimethoxysilylpropyl)hexasulfide, 3,3-bis(trimethoxysilylpropyl)octasulfide, 3,3-bis(trioctoxysilylpropyl)tetrasulfide, 3,3-bis(trihexoxysilylpropyl)disulfide, 3,3-ibis(tri-2-ethylhexoxysilylpropyl)trisulfide, 3,3-bis(triisooctoxysilylpropyl)tetrasulfide, 3,3-bis(tri-t-butoxysilylpropyl)disulfide, 2,2-bis(methoxydiethoxysilylethyl)tetrasulfide, 2,2-bis(tripropoxysilylethyl)pentasulfide, 3,3-bis(tricycloneoxysilylpropyl)tetrasulfide, 3,3-bis(tricyclopentoxysilylpropyl)trisulfide, ...
Where it comes from: Tetradecylthioacetic Acid (also known-and more easily pronounced-as TTA) is a fatty acid that does not get used for fuel by the body, but instead helps to regulate how much fat the body stores by influencing genes that control the metabolism. Its delivered to the body in supplement form.
The thermodynamics for the first electron transfer step for sulfide and oxygen indicates that the reaction is unfavorable as unstable superoxide and bisulfide radical ions would need to be produced. However, a two electron transfer is favorable as stable S(0) and peroxide would be formed, but the partially filled orbitals in oxygen that accept electrons prevent rapid kinetics. Abiotic sulfide oxidation kinetics improve when reduced iron and/or manganese are oxidized by oxygen to form oxidized metals which in turn oxidize sulfide. Biological sulfur oxidation relies on enzymes that have evolved to overcome these kinetic constraints to affect rapid sulfide oxidation. Here we review the available thermodynamic and kinetic data for H2S and HS• as well as O2, reactive oxygen species, nitrate, nitrite and NOx species. We also present new kinetic data for abiotic sulfide oxidation with oxygen in trace metal clean solutions that constrain abiotic rates of sulfide oxidation in metal free solution and agree with
A major source of air pollution years ago was the metals industry. One common process involved roasting metal sulfides in the air: 2 PbS(s) + 3 O_2(g) --| 2 PbO(s) + 2 SO_2(g) If you heat 2.5 mol of PbS(s) in the air, what.
Lucas C. Ducati.; Matheus P. Freitas.; Cláudio F. Tormena, Roberto Rittner. Conformational and stereoelectronic investigation of chloromethyl methyl sulfide and its sulfinyl and sulfonyl analogs. Journal of Molecular Structure. 2006, 800 (1-3), 45-50.. Akira Hosomi.; Shinji Hayashi.; Koichiro Hoashi.; Shinya Kohra.; Yoshinori Tominaga. Intramolecular cyclization via onium salts: a novel synthesis of 1,3-thiazolidines from chloromethyl (trimethylsilyl)methyl sulfide and nitrogen-containing heteroaromatic compounds. J. Org. Chem. 1987, 52 (19), 4423-4424.. Protects alcohols as their methylthiomethyl (MTM) ethers by reaction, e.g. with NaH/NaI in DME: Tetrahedron Lett., 3269 (1975), or with AgNO3/Et3N: Chem. Lett., 1277 (1979). MTM ethers are relatively stable to acid but can be cleaved selectively with HgCl2 in aqueous acetonitrile or AgNO3/ 2,6-lutidine: Tetrahedron Lett., 3269 (1975), by methylation (MeI) and hydrolysis: Austral. J. Chem., 31, 1031 (1978); Chem. Lett., 715 (1984), or with TMS ...
XIAO-HU LI*, JIAN-QIANG WANG, FENG-YOU CHU, HAO WANG, ZHENG-GANG LI, XING YU, WEI WANG Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, 36 Baochubei Road, Hangzhou 310012, P.R. China (Received December 18, 2016; Accepted July 10, 2017) Abstract: Considerable Cu isotopic fractionation occurs during the formation of mineral deposits and the oxidative weathering processes of modern seafloor hydrothermal sulfides. This report is the first to describe Cu isotopic compositions of Cu-rich and Zn-rich sulfides, and their oxidation products collected from hydrothermal fields along the South Mid-Atlantic Ridge (13-15°S). Results show that the δ65Cu values of these sulfides and their oxidation products are -0.58‰ to +1.36‰, with an average value of 65Cu=+0.30±1.02‰ (n=17, 2 sd). Cu-rich sulfides have slightly lighter Cu isotope compositions, with an average δ65Cu=+0.37±0.16‰ (n=5, 2 sd), whereas Zn-rich sulfides are enriched in heavy Cu ...
mineral - Sulfide Minerals - The sulfides include the majority of ore minerals from which metals are obtained. Thus, lead sulfide forms the mineral galena; silver sulfide, argentite; and zinc sulfide, sphalerite. These minerals are often found together as ores.Two important sulfides of arsenic are realgar and orpiment. Antimony sulfide is called stibnite. Antimony is alloyed with lead for casting the type metal used in printing. The mineral cinnabar is a sulfide of mercury. Molybdenum, a metal…
Lookup HS Codes for China vi 28.13.90 Other non-metallic sulfides, phosphorus trisulfide Goods. Avalara LandedCosts helps determine your duty rates and other import taxes for China.
Sulfide-based luminescent materials have attracted a lot of attention for a wide range of photo-, cathodo- and electroluminescent applications. Upon doping with Ce3+ and Eu2+, the luminescence can be varied over the entire visible region by appropriately choosing the composition of the sulfide host. Main application areas are flat panel displays based on thin film electroluminescence, field emission displays and ZnS-based powder electroluminescence for backlights. For these applications, special attention is given to BaAl2S4:Eu, ZnS:Mn and ZnS:Cu. Recently, sulfide materials have regained interest due to their ability (in contrast to oxide materials) to provide a broad band, Eu2+-based red emission for use as a color conversion material in white-light emitting diodes (LEDs). The potential application of rare-earth doped binary alkaline-earth sulfides, like CaS and SrS, thiogallates, thioaluminates and thiosilicates as conversion phosphors is discussed. Finally, this review concludes with the size
Schönberger, S., Jagdhuber, C., Ascherl, L., Evangelisti, C., Klapötke, T. M. and Karaghiosoff, K. (2014), New Acyclic Neutral Phosphorus Sulfides and Sulfide Oxides. Z. anorg. allg. Chem., 640: 68-75. doi: 10.1002/zaac.201300419 ...
Dioxygenase-catalysed trioxygenation of alkyl phenyl sulfides and alkyl benzenes yields enantiopure cis-dihydrodiol sulfoxides and triols respectively; naphthalene cis-dihydrodiol dehydrogenase-catalysed aromatisation of these diastereoisomers gives enantiopure catechols of either configuration.. ...
Wang, K, OReilly, S, Honda, M et al 2010, Co-rich sulfides in mantle peridotites from Penghu Islands, Taiwan: Footprints of Proterozoic mantle plumes under the Cathaysia Block, Journal of Asian Earth Sciences, vol. 37, no. 3, pp. 229-245. ...
Manivel, P and Khan, Nawaz F and Hatwar, Venkatesha R (2010) Synthesis of Diversified Thioethers,1-Aroylalkylisoquinolin-1-yl Thioethers, by Electrophilic S-Alkylation of 3-Phenyl Isoquinoline-1(2H)-thione. In: Phosphorus, Sulfur, and Silicon and the Related Elements, 185 (9). pp. 1932-1942. Full text not available from this repository ...
sodium sulfide: see also record for sodium bisulfide; actisoufre is the sodium sulfide component of sulfur-containing thermal springs which is also found in Saccharomyces cerevisiae
... The 2013 Import and Export Market for Sodium Sulfide in the Middle - Market research report and industry analysis - 7497510
Sodium Sulfide Spot Test Definition - A sodium sulfide spot test is a localized chemical test to detect any concentration of lead in a coating...
Hesketh, A.H. and Broadhurst, J.L. and Bryan, C.G. and van Hille, R.P. and Harrison, S.T.L. 2010. Biokinetic test for the characterisation of AMD generation potential of sulfide mineral wastes. Hydrometallurgy. 104 (3-4): pp. 459-464 ...
Severson, DL; Hafstad, Anne Dragøy; Khalid, Ahmed Murtaz; Clarke, Kieran; Hagve, Martin; Berge, Rolf; Lund, trine; Larsen, Terje; Aasum, ...
A process for biooxidation of sulfides in a heap of mineral ores by freeing precious metals dispersed or occluded within said ores as pyritic or arsenopyritic sulfides and the like; the process comprises forming particulates from ore particles with an inoculate comprising bacteria capable of attacking, by biooxidation, sulfides and/or elemental sulfur in said ore particles; from these particulates a heap is constructed; and the biooxidation takes place in such heap by adding to or dispersing within the heap a leaching solution, circulating the leaching solution within the heap and recovering the precious metal values from the heap; recovery may be accomplished with a cyanide, thiourea, or a thiosulfate lixiviant.
Frank: Thank you for the comment. It is hard to answer your question because GTAC has not been very forthcoming about what its plans actually are. There are two end-members of a range of possibilities. At one end, it is possible that everything GTAC has said is true, that it has not looked at the cores, that it has no idea what is in they Tyler shale, and that this is an iron mine pure and simple. In that case the mine will uncover pyrite and apatite in the process of recovering the iron, which is a problem that has not been discussed at all by either by GTAC or the legislators. The whole rationale for creating separate laws to cover the mining of iron oxides is that iron oxide mining will not uncover sulfides. The presence of sulfides in the Tyler undermines this rationale. At the other extreme is the possibility that GTAC knows exactly what is in the Tyler and is hiding it, either to prevent the issue of sulfides being raised during debate over a bill that creates an artificial distinction ...
Frank: Thank you for the comment. It is hard to answer your question because GTAC has not been very forthcoming about what its plans actually are. There are two end-members of a range of possibilities. At one end, it is possible that everything GTAC has said is true, that it has not looked at the cores, that it has no idea what is in they Tyler shale, and that this is an iron mine pure and simple. In that case the mine will uncover pyrite and apatite in the process of recovering the iron, which is a problem that has not been discussed at all by either by GTAC or the legislators. The whole rationale for creating separate laws to cover the mining of iron oxides is that iron oxide mining will not uncover sulfides. The presence of sulfides in the Tyler undermines this rationale. At the other extreme is the possibility that GTAC knows exactly what is in the Tyler and is hiding it, either to prevent the issue of sulfides being raised during debate over a bill that creates an artificial distinction ...
The six families we will investigate include the sulfides, sulfates, oxides, halides, carbonates, borates, and silicates. Sulfides and sulfates all have sulfur in the anion. For example galena is a sulfide and its composition is PbS. The sulfides mainly are metallic. The sulfates include the radical SO4 and include minerals that are nonmetallic. These can include gypsum. Some families have an anion that is related to oxygen. Oxides contain a anion that is usually a metal in combination with oxygen. For example, hematite is iron plus oxygen (Fe2O3). Carbonates include the CO3 radical and includes minerals like calcite. Borates contain the BO3 group and include minerals like borax and ulexite. Sulfates also have oxygen within its radical.. Silicates form the largest chemical class among the minerals. They contain various elements in different combination like sodium, potassium, calcium, magnesium, aluminum, and iron in combination with silicon and oxygen. They have very complex chemical structures. ...
73296-91-0 - Phenol, 4-((2,4-dinitrophenyl)amino)-, reaction products with sodium sulfide (Na2(Sx)), oxidized - Searchable synonyms, formulas, resource links, and other chemical information.
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The Global Industry Report North America Sodium Sulfide Market by Manufacturers, Countries, Type and Application, Forecast to 2022 Market - by Manufacturers, States, Countries, Regions (Province), Type and Application, 2017 Forecast to 2022,Analysis, Regional Outlook, Share, Growth By Global Info Reports.
Sulfide Oxidation with Hydrogen Peroxide (H2O2) - Water and Wastewater - Chemical Water Treatment by USP Technologies. Sulfide Odor ControlSulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide ...
A method for treating a heavy metal-containing liquid, such as a wastewater stream, oil for recycling, or other metal-bearing liquid, with a trithiocarbonate, particularly an alkali metal trithiocarbonate, such as sodium trithiocarbonate, to precipitate the metals as insoluble sulfides. The precipitated metal sulfides are recovered as a low volume sludge, which can be processed through standard metallurgical techniques to yield the metals in economically useful forms. Among the most unexpected results produced by this method is the lowering of the selenium content in a naturally occurring body of water from 1.0 ppm to 0.0015 ppm.
Results Exhaled acetone increased with higher expiratory flow rate (805, 838, 898 ppb, p=0.02). Levels of methanol (206 vs 179 ppb, p,0.01), acetaldehyde (26 vs 22 ppb, p,0.01), ethanol (410 vs 208 ppb, p=0.01) and dimethyl sulphide (113 vs 103 ncps, p,0.01) fell significantly following 30s hyperventilation. After 30 second breathold levels of methanol (206 vs 217 ppb, p=0.02), acetone (805 vs 869 ppb, p,0.01), isoprene (348 vs 390 ppb, p=0.02) and dimethyl sulphide (113 vs 136 ncps, p=0.02) increased significantly. Variation in respiratory parameters did not significantly alters the level of acetonitrile, propanol and butyric acid within the breath of healthy subjects. ...
Gratonite is a rare lead sulfide mineral. It forms nice crystals that can be arranged into rosette-like clusters with projecting rhombohedral terminations. Clusters can be attractive and good specimens command large prices, mostly because of the rarity of the mineral. Gratonite is a sulfosalt, a segment of sulfides where the arsenic acts more like a metal than a non-metal and occupies a position where it is bonded to sulfurs. Also, Gratonite is the most common mineral whose symmetry is in the Trigonal Pyramidal Class. ...
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Н.В. Изарова, О.А. Холдеева, М.Н. Соколов, В.П. Федин, Исследование каталитических свойств гигантского полиоксомолибдата в реакциях селективного окисления тиоэфиров, Известия АН, Сер. хим. 2009, № 1, 134-137. (N. V. Izarova, O. A. Kholdeeva, M. N. Sokolov, V. P. Fedin, Catalytic properties of the macromolecular polyoxomolybdate cluster in selective oxidation of sulfides, Russian Chemical Bulletin Int. Ed., 2009, 58, N 1, 134-137 ...
The Rb-Sr dating of sphalerite is a powerful method for evaluating the timing of large-scale crustal fluid flow events and testing hydrological models. The Mississippi Valley-type Zn-Pb deposit at Blendevale, Western Australia, is the largest of several such deposits situated on the northern margin of the Canning basin on the Lennard shelf. It is hosted by the reefal facies of the Devonian (Frasnian) Pillara Limestone, flanked to the south by the Fitzroy trough, a deep half-graben. Rb-Sr isotope analysis of six sphalerites and their fluid inclusion leachares form an isochron indicating an age of 357 + or - 3 Ma (( 87 Sr/ 86 Sr) 0 = 0.7129 + or - 2), in good agreement with the average age, 355 + or - 14 Ma, of the leachate-sphalerite pairs and an isochron consisting of a sphalerite sample, its leachate, and associated host carbonate (362 + or - 12 Ma). This age renders as untenable a recently proposed model calling for basinal brine expulsion in response to a hydrocarbon generation event ...
02.AB.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf ...
Principal Investigator:KONISHI Yasuhiro, Project Period (FY):1998 - 1999, Research Category:Grant-in-Aid for Scientific Research (C), Section:一般, Research Field:資源開発工学
A recently discovered, moderately thermostable Baeyer-Villiger monooxygenase, polycyclic ketone monooxygenase (PockeMO), from Thermothelomyces thermophila has been employed as a biocatalyst in a set of asymmetric sulfoxidations. The enzyme was able to catalyze the oxidation of various alkyl aryl sulfides with good selectivities and moderate to high activities. The biocatalytic performance was able to be further increased by optimizing some reaction parameters, such as the addition of 10% v v−1 of water miscible solvents or toluene, or by performing the conversion at a relatively high temperature (45 °C). PockeMO was found to display an optimum activity at sulfide concentrations of 50 mM, while it can also function at 200 mM. Taken together, the data show that PockeMO can be used as robust biocatalyst for the synthesis of optically active sulfoxides.
Read "Preparation of nanosized sulfur particles from aqueous solutions of calcium and sodium polysulfides, Russian Journal of Applied Chemistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
The field of nanoscience is delivering increasingly intricate yet elegant geometric structures incorporating an ever-expanding palette of materials. Atomic layer deposition (ALD) is a powerful driver of this field, providing exceptionally conformal coatings spanning the periodic table and atomic-scale precision independent of substrate geometry. This versatility is intrinsic to ALD and results from sequential and self-limiting surface reactions. This characteristic facilitates digital synthesis, in which the film grows linearly with the number of reaction cycles. While the majority of ALD processes identified to date produce metal oxides, novel applications in areas such as energy storage, catalysis, and nanophotonics are motivating interest in sulfide materials. Recent progress in ALD of sulfides has expanded the diversity of accessible materials as well as a more complete understanding of the unique chalcogenide surface chemistry. ALD of sulfide materials typically uses metalorganic precursors ...
1. This is the average level found averaged over all samples that were tested. If a sample had no detection, its contribution to the average is zero, even though there might be a small amount of residue present, but below the "detection limit." The units are μg/kg (micrograms per kilogram) which is the same as part per billion (ppb). For liquids the definition is slightly different but for practical purposes equivalent.. 2. The results in this table are for all groups of samples combined: domestic, imported, conventional and organic. Click on "Show Details" to see the levels broken down by group.. 3. The maximum level is the highest level found in a sample. For both the average level and the maximum level, all samples - organic or conventional, domestic or imported - are included.. ...
The observation of "efflorescences," or the flowering of salts, associated with periods of dryness in soils, in closed-basin lakes, in rock outcrops, and in mines and mine wastes has been noted since early antiquity. The formation of metal-sulfate salts, in connection with the mining of metals, was a phenomenon well known to the early Greek and Roman.... ...
stannite: A sulfide mineral, chemical formula Cu 2 FeSnS 4, that is an ore of tin. It is ordinarily found associated with other sulfide minerals in tin veins, as at Cornwall, England; Zeehan,...
Pyrites \Py*rites\, n. [L., fr. Gr. ?, fr. ? fire. See {Pyre}.] (Min.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color. [1913 Webster] Note: The term was originally applied to the mineral pyrite, or iron pyrites, in allusion to its giving sparks when struck with steel. [1913 Webster] {Arsenical pyrites}, arsenopyrite. {Auriferous pyrites}. See under {Auriferous
The detrital pyrite grains are large, much larger than the possible cells in the carbonaceous matter, and are rounded. This suggests that the pyrite is not a product of possible organic activity. There is some pyrite within the carbonaceous matter, but this pyrite is much smaller and angular in shape - as expected if they have been precipitated as a result of organic activity. The detrital pyrite grains are also covered by the silica cement layers. The evidence suggests that the pyrite is primary - that is it was present as an original constituent of the sand - rather then being a product of organic activity. As the pyrite only occurs in the base of the sandstone, primarily in erosive channels in the underlying volcanics, it seems likely that the pyrite grains were formed from the erosion of underlying rocks and have been left behind as a lag deposit as pyrite grains are much heavier that similar sized grains formed from other materials like quartz. The renewed influx of sediment resulted in the ...
The detrital pyrite grains are large, much larger than the possible cells in the carbonaceous matter, and are rounded. This suggests that the pyrite is not a product of possible organic activity. There is some pyrite within the carbonaceous matter, but this pyrite is much smaller and angular in shape - as expected if they have been precipitated as a result of organic activity. The detrital pyrite grains are also covered by the silica cement layers. The evidence suggests that the pyrite is primary - that is it was present as an original constituent of the sand - rather then being a product of organic activity. As the pyrite only occurs in the base of the sandstone, primarily in erosive channels in the underlying volcanics, it seems likely that the pyrite grains were formed from the erosion of underlying rocks and have been left behind as a lag deposit as pyrite grains are much heavier that similar sized grains formed from other materials like quartz. The renewed influx of sediment resulted in the ...
The detrital pyrite grains are large, much larger than the possible cells in the carbonaceous matter, and are rounded. This suggests that the pyrite is not a product of possible organic activity. There is some pyrite within the carbonaceous matter, but this pyrite is much smaller and angular in shape - as expected if they have been precipitated as a result of organic activity. The detrital pyrite grains are also covered by the silica cement layers. The evidence suggests that the pyrite is primary - that is it was present as an original constituent of the sand - rather then being a product of organic activity. As the pyrite only occurs in the base of the sandstone, primarily in erosive channels in the underlying volcanics, it seems likely that the pyrite grains were formed from the erosion of underlying rocks and have been left behind as a lag deposit as pyrite grains are much heavier that similar sized grains formed from other materials like quartz. The renewed influx of sediment resulted in the ...
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Some novel cross-linkable fluorinated poly(arylene ether sulfides) (FPAESI) were synthesized for use in optical waveguide applications. The materials have
Galena is one of the most abundant and widely distributed sulfide minerals. … It is often associated with the minerals sphalerite, calcite and fluorite. … These argentiferous galenas have long been the most important ore of silver in mining. … Selenium substitutes for sulfur in the structure constituting a solid solution series.. »More detailed ...
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
Five stratiform Zn-Pb-Ag deposits are known in Early Cambrian metapelitic rocks along a curvilinear trend in the Anvil Range, central Yukon. The Anvil Range deposits occur along the SW boundary of the Selwyn basin in the stratigraphic transition zone between metapelites of the Mt Mye unit and calcareous phyllites of the overlying Vangorda unit. The massive sulfides are associated closely with anomalously thick graphitic phyllites, apparently related to a second-order basin.-from Authors...
Pyrite triplet Wagnerite is a powerful little stone. It assists in time of fatigue and burn out.. The energy of Pyrite triplet Wagnerite supports the base, sacral and solar plexus chakras, especially if these chakra centres have experienced stressful energy .. ...
Sulfur bridges: The reactions of [LAl(SH)2] (L=HC(CMeNAr)2, Ar=2,6-iPr2C6H3) with LiN(SiMe3)2 in molar ratio 1:2 and 1:1, respectively, lead to species with the formula [{LAl[(SLi)2(thf)3]}2]⋅2 THF and [{LAl(SH)[SLi(thf)2]}2] in high yields. These lithium salts react further with [Cp2MCl2] (M=Ti, Zr; Cp=C5H5) to give unique heterobimetallic sulfides of composition [LAl(μ-S)2MCp2] (see structure; M=Ti). ...
Return to index February 13, 2013 TSX-V DOS. Positive gold in tills and float on Dios 14 Karats. Montreal, QC, Canada - DIOS EXPLORATION regional 2012 & 2011 till sampling programs (54 & 69 glacial sand samples) yielded over 1 gram per ton gold in till: 1010 parts per billion gold (ppb Au), 836 ppb Au, 642 ppb Au, Au, 583 ppb Au, 454 ppb Au, 356 ppb Au, 160 ppb Au, 151 ppb Au, 131 ppb Au, 120 ppb Au, , 115 ppb Au, 113 ppb Au, 109 ppb Au (in heavy mineral concentrates) on its 14 KARATS project. In the vicinities of arsenic in lake sediment anomalies of 11, 17 and 18 parts per million, a metric silicified meta-sedimentary boulder with disseminated sulfides (2-5% arsenopyrite-pyrite-pyrrhotite) returned 2.6 g/t gold, 0.7 g/t silver, over 1% arsenic and 0.3% tungsten. The same area hosts abundant mineralized (1-10% PY-ASPY-PO) Opatica metasedimentary boulders, with several angular floats up to 6 m by 6 m by 3 m large, suggesting a local source. The geological context suggests Eleonore-type ...
Spectra/Por Standard Grade Regenerated Cellulose (RC) is an economical dialysis membrane ideal for applications like desalting, buffer exchange, pH change, sample prep, protein purification, etc. Pre-treated to eliminate trace levels of heavy metals and sulfides, high purity Spectra/Por 7 tubing has good chemical compatibility and high pH and temperature tolerance.
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Kongliga Svenska Vetenskaps-Akademiens Handlingar 23 (1802), 68. Hermann (1846), Journal. pr. Chem. 38, 119.. Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 763-766.. Canadian Mineralogist (1957) 6, 72.. Acta Crystallographica 23, 939-944.. Mineralogical Magazine (1958) 31, 937.. Strunz Mineralogical Tables 9. Edition (2001), 220.. ...
Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent dust cloud. Avoid inhalation of asbestos dust ...
predict the outcome of mixing aqueous solutions of the following reactions. write the ionic equations of each. mercury (ll) nitrate + ammonium iodide manganese (ll) chloride + sodium sulfide lead (ll) nitrate + sodium sulfate barium ...
The Sheehan Disability Scale (SDS) comprises self-rated items designed to measure impairment. The patient rates the extent to which his or her (1) work, (2) social life or leisure activities and (3) home life or family responsibilities are impaired on a 10-point visual analogue scales, on which 0 = normal functioning and 10 = severe functional impairment. The three items may be summed into a single dimensional measure of global functional impairment that ranges from 0 (unimpaired) to 30 (highly impaired). The higher the score, the more severe ...
All participants were asked to take one capsule at the same time each day throughout the study.. This single-center trial was conducted in the United States. The overall time to participate in this study was approximately 7 weeks. Participants made 2 visits to the clinic, including 18 days confinement to the clinic, and were contacted by telephone 1 day and 27 days after leaving confinement for a follow-up assessment. ...
Li-S battery analyzed by UVVis in operando mode ChemSusChem , 2013, 6 , 1177-1181 Manu U. M. Patel, Rezan Demir-Cakan, Mathieu Morcrette, Jean-Marie Tarascon, Miran Gaberscek, Robert Dominko Abstract UVVis spectrophotometry is demonstrated as a powerful analytical method for the insitu study of polysulfides. Through the interactions that occur...
Sulphide (?), n. Chemistry|Chem. A binary compound of sulphur, or one so regarded; -- formerly called sulphuret. Double sulphide Chemistry|Chem., ...
Diallyl trisulfide (DATS), also known as Allitridin, is an organosulfur compound with the formula S(SCH2CH=CH2)2. It is one of several produced by the hydrolysis of allicin, including diallyl disulfide and diallyl tetrasulfide, DATS is one of the most potent. Many health benefits of garlic are attributed in part to DATS. These benefits include anti-cancer effects, platelet aggregation, blood pressure reduction, decreases in cholesterol levels, and increases in levels of reactive oxygen species. DATS has been shown to selectively kill cancerous cells in the prostate and breast, leaving healthy cells unharmed. This effect is attributed to increased reactive oxygen species (ROS) within cancer cells, increased the number of cells that arrest in the G2 phase of mitosis, and promote an increase in caspase-3 activity. These effects appear to contribute to the apoptosis of cancer cells and a decrease in cancer cell proliferation. DATS can be metabolized by glutathione in red blood cells to form hydrogen ...
US EPA PC Code ); 006901 (US EPA PC Code Text ); 12044-79-0 (CAS number); 12044790; 12044790 (CAS number without hyphens); 12344682; 12612214; 1303-33-9 (CAS number); 1303-34-0 (CAS number); 1303339; 1303339 (CAS number without hyphens); 1303340; 1303340 (CAS number without hyphens); 56320220; Arsenic disulfide (CAS 56320-22-0); Arsenic sesquisulfide; Arsenic sesquisulfide (CAS 1303-33-9); Arsenic sulphide; Arsenic trisulfide; Arsenic trisulfide (As2S3); Arsenic trisulfide (CAS 1303-33-9); Arsenic trisulphide; Arsenic yellow; Arsenic yellow (CAS 1303-33-9); Arsenictrisulfide; Arsenone S; Arsenone S (CAS 12344-68-2); Diarsenic pentasulfide; Diarsenic pentasulfide (CAS 1303-34-0); Diarsenic tetrasulfide; Diarsenic tetrasulfide (CAS 12344-68-2); Diarsenic trisulfide; Diarsenic trisulfide (CAS 1303-33-9); Thioxoarsino; Thioxoarsino (CAS 12044-79-0 ...
China Sodium Hydrosulfide supplier, Ammonium Thiocyanate, Sodium Sulfide Manufacturers/ Suppliers - Qixian County Dongfang Chemical Co., Ltd.
China Sodium Sulphide Red Flake (20ppm/30ppm/1500ppm) 1313-82-2, Find details about China Sodium Sulphide, Sodium Sulphide 60 Red Flake from Sodium Sulphide Red Flake (20ppm/30ppm/1500ppm) 1313-82-2 - Zouping Changshan Zefeng Fertilizer Co., Ltd.
Hydrogen sulfide (H2S) is an endogenous gasotransmitter in human physiology and inflammatory disease, however, with limited knowledge of how signal transduction pathways are involved in immune cells. To examine the effects of sulfide on relevant intracellular signaling in human peripheral blood mononuclear cells (PBMCs), we stimulated healthy donor PBMCs with sodium hydrosulfide (NaHS, 1-1000 μM) to mimic H2S stimulation, and analyzed phosphorylation of p38 mitogen activated protein kinase (MAPK) (pT180/pY182), NF-κB p65 (pS529), Akt (pS473) and CREB/ATF1 (pS133/pS63) with flow and mass cytometry. In contrast to transient effects in subsets of lymphocytes, classical monocytes demonstrated sustained phosphorylation of p38, Akt and CREB/ATF1. NaHS induced calcium dependent phosphorylation of p38, Akt and CREB, but not NF-κB, and the phosphorylation of Akt was partly dependent on p38, indicative of p38-Akt crosstalk. Attenuation of these effects by molecules targeting p38 and Hsp90 indicated ...
In this study, cadmium sulfide nanoparticles (CdS NPs) were prepared, characterized and used as a new adsorbent for simultaneous removal of Pb(II) and Cu(II) ions from aqueous solutions. Using a batch adsorption method, the effects of solution pH, contact time, adsorbent dose, and temperature were studied and optimized. Removal efficiencies, higher than 98% were obtained for both the metal ions at the optimum conditions. The adsorption process was rapid, as equilibrium was achieved within 15 min. The kinetic and isotherm experiment data could be well described with the pseudo-second order kinetic model and the Freundlich isotherm model. The maximum adsorption capacities for Pb(II) and Cu(II) ions were 200 mg/g and 166.7 mg/g, respectively. The thermodynamics of adsorption process such as changes in standard free energy, enthalpy and entropy were also discussed. This study revealed that CdS NPs are effective adsorbent for rapid removal of Pb(II) and Cu(II) ions from aqueous solutions.
Aerobic photooxidation of sulfides with the diacids of meso-tetra(phenyl)porphyrin, H2TPP (acid = CF3COOH, Cl2CHCOOH, HClO4 and H2SO4) under sunlight in acetonitrile gave the corresponding sulfoxides as nearly the exclusive product. The photocatalytic activity of the dications decreased as H4TPP(ClO4)2 ≫ H4TPP(Cl2C
Page contains details about zinc sulfide/cadmium sulfide nanocrystals . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
The reaction of H2O2 with thioanisole and p-methoxythioanisole catalysed by lignin peroxidase from Phanerochaete chrysosporium has been studied spectrophotometrically under turnover and single turnover conditions with a stopped-flow apparatus. Pre-formed lignin peroxidase compounds I and II are each able to react with the sulphides to form a sulphide radical cation. The radical cation is then converted into the sulphoxide either by reaction with the medium or by reaction with compound II. This is the first report of a direct reaction between compound II and the substrate radical cation. With thioanisole, significant enantiomeric selectivity and high oxygen incorporation in the sulphoxide are obtained because compound II is preferentially reduced by the enzyme-bound thioanisole radical cation compared with the neutral substrate. By contrast, with p-methoxythioanisole, the data imply formation of an intermediate ternary complex comprising compound II, radical cation and neutral substrate, such ...
ABSTRACT: The ecophysiological differences of 4 sibling species of the Capitella capitata species complex from habitats with different sulfide concentrations were studied: Capitella sp. S (small) from a North Sea intertidal flat, living in the upper sediment layer containing low sulfide concentrations (up to 20 µmol l-1); Capitella sp. L (large), sympatric to Capitella sp. S, but living in deeper sediment layers with high sulfide concentrations (up to 350 µmol l-1); Capitella sp. M from the Mediterranean Sea from highly sulfidic sediments (up to 710 µmol l-1) close to shallow hydrothermal vents; and Capitella sp. I from eutrophicated coastal areas of the North Atlantic. Capitella sp. L, Capitella sp. M and Capitella sp. I are significantly more tolerant to anoxia and 760 µmol l-1 sulfide than Capitella sp. S from the upper North Sea sediments. Respiration rates showed that only Capitella sp. S can be characterized as an oxyconformer. The oxygen consumption of Capitella sp. S becomes ...
Arsenic trisulfide definition, a yellow or red crystalline substance, As 2 S 3 , occurring in nature as the mineral orpiment, and used as a pigment (kings yellow) and in pyrotechnics. See more.
Press Release issued Dec 1, 2017: Market Research Reports Search Engine (MRRSE) has been serving as an active source to cater intelligent research report to enlighten both readers and investors. This research study titled Sodium Hydrosulfide Market
Cadmium Sulfide is a medicine available in a number of countries worldwide. A list of US medications equivalent to Cadmium Sulfide is available on the Drugs.com website.
Hydrothermal sulfide chimneys located along the global system of oceanic spreading centers are habitats for microbial life during active venting. Hydrothermally extinct, or inactive, sulfide deposits also host microbial communities at globally distributed sites. The main goal of this study is to describe sulfide mineral alteration at the seafloor, and examine alteration products for signatures of biological activity using Fe mineralogy and stable isotope approaches. The study includes active and inactive sulfides from the East Pacific Rise 9o50N vent field. First, the mineralogy of Fe(III)-bearing precipitates is investigated using microprobe X-ray absorption spectroscopy (µXAS) and X-ray diffraction (µXRD). Second, laser-ablation (LA) and micro-drilling (MD) are used to obtain samples for Fe stable isotopes by multicollector-inductively couple plasma-mass spectrometry (MC-ICP-MS). Eight Fe-bearing minerals types are present in the samples: oxyhydroxides, secondary phyllosilicates, and sulfides
Find Leading Sodium Sulphide Flakes Manufacturers, Suppliers, Exporters and Traders at one place. Contact Exporters India for more information about Sodium Sulphide Flakes manufacturers
Im trying to do this net ionic equation and i keep getting stuck. ok for a surface sample from a river is suspected of lead(IV) contamination. When 5.00 ml of this sample is combined with 5.00 ml of an .185M aq solution of sodium sulfide a precipitation is formed. when this precipitate is carefully collected and then dried and weighed a mass of 0.653 mg is obtained. so what is the net ionic equation for that? and how do i find the molar concentration for lead(IV) in the original sample? anyone ...
Im trying to do this net ionic equation and i keep getting stuck. ok for a surface sample from a river is suspected of lead(IV) contamination. When 5.00 ml of this sample is combined with 5.00 ml of an .185M aq solution of sodium sulfide a precipitation is formed. when this precipitate is carefully collected and then dried and weighed a mass of 0.653 mg is obtained. so what is the net ionic equation for that? and how do i find the molar concentration for lead(IV) in the original sample? anyone ...
Suppliers of Hydrogen Sulfide Removal, news and case studies about Hydrogen Sulfide Removal on the Desalination & Water Reuse Marketplace
The synthesis of metal sulfide (MS) materials with sizes in the sub-10 nm regime often requires capping agents with long hydrocarbon chains that affect their structures and properties. Herein, this study presents a molten-state synthesis method for a series of transition-MS nanoparticles using thiourea as a reactive precursor without capping agents. This study also reports the synthesis of MS with single metals (Fe, Co, Ni, Cu, and Zn) and quaternary CuGa2In3S8 using the same synthesis protocol. Thiourea first melts to form a molten-state condition to serve as the reaction medium at a relatively low temperature (,200 °C), followed by its thermal decomposition to induce a reaction with the metal precursor to form different MS. This synthesis protocol, owing to its dynamic characteristics, involves the formation of a variety of organic carbon nitride polymeric complexes around the MS particles. Dynamic nuclear polarization surface-enhanced nuclear magnetic resonance spectroscopy is effective to ...
The changes in neurotransmitters biosynthesis in the cerebrum of Coq9R239X mice are not limited to the reduction in L‐glutamate but also to the biosynthesis of serotonin and catecholamines. These alterations might be a consequence of the disruption in hydrogen sulfide metabolism because a dose‐dependent and time‐dependent decrease in glutamate levels and increase in serotonin levels have been described in the cerebrum and frontal cortex of rats chronically exposed to 20 ppm and 75 ppm of hydrogen sulfide (Skrajny et al, 1992; Roth et al, 1995). The same authors reported a decrease in the levels of norepinephrine with the exposure to 20 ppm of hydrogen sulfide and an increase in those levels with the exposure to 75 ppm of hydrogen sulfide (Skrajny et al, 1992). Norepinephrine and epinephrine levels were, however, decreased in isolated porcine iris‐ciliary body exposed to increased concentrations of NaSH, which is a commonly used hydrogen sulfide donor (Kulkarni et al, 2009). The changes ...
The 2nd analytical group of cations consists of ions that form acid-insoluble sulfides. Cations in the 2nd group include: Cd2+, Bi3+, Cu2+, As3+, As5+, Sb3+, Sb5+, Sn2+, Sn4+ and Hg2+. Pb2+ is usually also included here in addition to the first group. Although these methods refer to solutions that contain sulfide (S2−), these solutions actually only contain H2S and bisulfide (SH−). Sulfide (S2−) does not exist in appreciable concentrations in water. The reagent used can be any substance that gives S2− ions in such solutions; most commonly used are H2S (at 0.2-0.3 M), AKT (at 0.3-0.6 M). The test with the sulfide ion must be conducted in the presence of dilute HCl. Its purpose is to keep the sulfide ion concentration at a required minimum, so as to allow the precipitation of 2nd group cations alone. If dilute acid is not used, the early precipitation of 4th group cations (if present in solution) may occur, thus leading to misleading results. Acids beside HCl are rarely used. Sulfuric acid ...
The Global Sodium Sulfide Industry 2015 Market Research Report is a professional and in-depth study on - Market Research Reports and Industry Analysis
Hydrogen sulphide or H2S is responsible for the characteristic "sulphur" smell of Rotorua.. There has long been medical and scientific debate about the health impacts of H2S gas in the workplace and residential areas, and this study is the largest ever of associations between ambient H2S and respiratory health. Concentrations of toxic hydrogen sulphide gas can be produced in factories as a by-product of industrial processes, as well as naturally in volcanic and geothermal regions like Rotorua.. The five year study examined a variety of health effects, including asthma, amongst over 1600 adult Rotorua residents. With a population of nearly 60,000, Rotorua is the largest centre anywhere with long term exposure to hydrogen sulphide and is recognised as an ideal place to research the health effects of H2S.. Exposure to H2S was estimated from measurements taken around Rotorua in summer and winter, and then each persons exposure was estimated from where they lived and worked. H2S exposure was divided ...
Tribotecc supplies a range of metal sulfides mainly based on manganese, molybdenum, bismuth and tungsten sulfides for the manufacturing of sintered parts. Even low concentrations of these functional additives lead to a better machinability and improve the tribological properties of the sintered powder matrix. As a consequence, high numbers of sintered parts can be produced in a cost-efficient way. They have complex geometries, withstand extreme stresses and are therefore eminently suitable for the use in automotive industry and other industries. ...
Contents. 1 Characteristics___________________________________________________4. 1.1 Physical properties_________________________________________4. 1.2 Chemical properties________________________________________5. 1.3 Allotropes________________________________________________5. 1.4 Isotopes__________________________________________________6. 1.5 Natural occurrence_________________________________________7. 2 Production______________________________________________________8. 2.1 Deposit in Kazakhstan______________________________________10. 3 Compounds_____________________________________________________10. 3.1 Sulfides__________________________________________________10. 3.2 Oxides and oxyanions_______________________________________11. 3.3 Halides and oxyhalides______________________________________12. 3.4 Pnictides_________________________________________________12. 3.5 Metal sulfides_____________________________________________12. 3.6 Organic ...
Sediment was collected 10-50 cm below the seawater/sediment interface at the Kai Tak Approach Channel connected to Victoria Harbor in Hong Kong, China. Sewage and industrial effluent had been discharged there for decades until the installation of a new sewage collection system in the late 1990s. The long lasting sulfate-reducing conditions resulted in a high sulfide concentration in the sediment, where an AVS (Acid-Volatile Sulfide) of 198 μmol g-1 had been measured [8]. The pore water after centrifugation at 4,000 rpm for 15 min had a pH of 7.89 and a salinity of 2.9%.. Enrichments were prepared by adding 20 g of wet sediment (32.0% dry matter) to serum bottles containing 70 mL of sterilized seawater, purged with N2 and incubated for at least 24 h at room temperature. Potassium nitrate (1 g L-1) and sodium phosphate, monobasic (0.1 mmol L-1), were then added from sterilized stock solutions. The bottles were incubated at 28°C in a water bath for 72 h. The enrichments were plated onto agar ...
Looking for sulphide? Find out information about sulphide. see sulfide sulfide, chemical compound containing sulfur and one other element or sulfur and a radical. Sulfides may be salts or esters of hydrogen sulfide,... Explanation of sulphide
Butyl methyl trisulfide | C5H12S3 | CID 189722 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
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Onion belongs to the lily group of plants. The other members of this group include leeks, shallots, garlic, etc. There are over 500 species of onion such as yellow onion, green onion, white onion and much more. Each kind of variety has its own unique taste and flavor, ranging from very strong to slightly sweet.. Not only is onion being used for centuries especially in the east to add flavor to foods, but is also known for its ornamental, therapeutic and medicinal effects.. Onion contains sulfides, thiosulfonates, and sulfoxides, which produce the eye-irritating results. The thiosulfonates exhibit anti-microbial qualities that make onion quite efficient at treating infections caused by E.coli, Salmonella and Bacillus subtilis.. Studies have demonstrated that onion is quite useful in avoiding coronary artery disease and cholesterol-reducing levels. The sulfides in onion help lower blood pressure levels and fats as well. Moreover, onion makes an excellent organic dietary source of flavonoids, which ...
Page contains details about dipeptide-coated indium phosphide/zinc sulfide nanoparticles . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
1574 Epidemiological data continues to support the notion that increased consumption of Allium vegetables may reduce the risk for different types of malignancies including cancer of the prostate. Moreover, allium vegetable derived organosulfur compounds, such as diallyl trisulfide (DATS; CH2=CH-CH2-(S)3-CH2-CH=CH2), are highly effective in affording protection against cancer development in animal models. Evidence is mounting to indicate that garlic-derived organosulfur compounds can suppress proliferation of cultured cancer cells by inhibiting cell cycle progression and causing apoptosis induction. Previous studies including those from our laboratory have offered novel insights into the mechanism of apoptosis induction by DATS. For instance we showed previously that DATS-induced apoptosis in PC-3 and DU145 human prostate cancer cells was associated with c-jun N-terminal kinase mediated phosphorylation of Bcl-2, which reduced Bax-Bcl-2 interaction to trigger activation of caspase-9/3. In the ...
Methods are generally provided of sputtering a cadmium sulfide layer on a substrate. The cadmium sulfide layer can be sputtered on a substrate from a target in a sputtering atmosphere, wherein the target comprises about 75% to about 100% by weight cadmium, and wherein the sputtering atmosphere comprises a sulfur-containing source gas. The cadmium sulfide layer can be used in methods of forming cadmium telluride thin film photovoltaic devices.
Water soluble positively charged 2-(dimethylamino) ethanethiol (DAET)-protected core-shell CdSe/ZnS quantum dots (QDs) were synthesized and incorporated within negatively charged Nafion polymer films. The water soluble QDs were characterized using UV-visible and fluorescence spectroscopies. Nafion/QDs composite films were deposited on glassy carbon electrodes and characterized using cyclic voltammetry. The electrochemiluminescence (ECL) using hydrogen peroxide as co-reactant was enhanced for Nafion/QDs composite films compared to films of the bare QDs. Significantly, no ECL was observed for Nafion/QDs composite films when peroxydisulfate was used as the co-reactant, suggesting that the permselective properties of the Nafion effectively exclude the co-reactant. The ECL quenching by glutathione depends linearly on its concentration when hydrogen peroxide is used as the co-reactant, opening up the possibility to use Nafion/QDs composite films for various electroanalytical applications.. ...
Cysteine desulfurases abstract sulfur from the substrate cysteine, generate a covalent persulfide on the active site cysteine of the enzyme, and then donate the persulfide sulfur to various recipients such as Fe-S clusters. In Saccharomyces cerevisiae, the Nfs1p protein is the only known cysteine desulfurase, and it forms a complex with Isd11p (Nfs1p·Isd11p). Both of these proteins are found primarily in mitochondria and both are essential for cell viability. In the present study we show, using the results of experiments with isolated mitochondria and purified proteins, that Isd11p is required for the cysteine desulfurase activity of Nfs1p. Whereas Nfs1p by itself was inactive, the Nfs1p·Isd11p complex formed persulfide and was active as a cysteine desulfurase. In the absence of Isd11p, Nfs1p was able to bind the substrate cysteine but failed to form a persulfide. Addition of Isd11p allowed Nfs1p with bound substrate to generate a covalent persulfide. We suggest that Isd11p induces an ...
Looking for online definition of cystathionine gamma-lyase in the Medical Dictionary? cystathionine gamma-lyase explanation free. What is cystathionine gamma-lyase? Meaning of cystathionine gamma-lyase medical term. What does cystathionine gamma-lyase mean?
TY - JOUR. T1 - Diallyl disulfide potentiates anti-obesity effect of green tea in high-fat/high-sucrose diet-induced obesity. AU - Bae, Jaehoon. AU - Kumazoe, Motofumi. AU - Fujimura, Yoshinori. AU - Tachibana, Hirofumi. PY - 2019/2/1. Y1 - 2019/2/1. N2 - Obesity is a major problem in developed countries and a burden on social health care systems. Several epidemiological studies showed the protective effects of green tea against obesity-related diseases. Cyclic guanosine monophosphate (cGMP) acts as a mediator for the physiological effects of (−)-epigallocatechin-3-O-gallate, the major constituent of green tea. Here, we showed that the level of phosphodiesterase 5, a negative regulator of cGMP, was up-regulated in adipose tissues of high-fat/high-sucrose (HF/HS) diet-fed mice and that this up-regulation was ameliorated by diallyl disulfide (DADS), the major organosulfur in garlic. A green tea extract (GT) and DADS in combination attenuated HF/HS diet-induced adipose increase and triglyceride ...
We report our theoretical investigation onto the shape dependence of two-photon absorption (TPA) in semiconductor nanocrystals (NCs). Based on a four-band model under effective mass approximation, we have developed a simple analytical theory capable of providing a quantitative explanation of the recent TPA measurement on CdS nanorods [Appl. Phys. Lett. 94, 103117 (2009)]. With this theory, we have systematically revealed the characteristics of TPA in CdSe and ZnO NCs with four different shapes: sphere, cube, cylinder and cuboid. Due to the splitting of degenerate energy levels caused by the decreased degree of symmetry, nanocuboids and nanocubes exhibit greater TPA cross-sections than nanocylinders and nanospheres of similar sizes, respectively. Similarly, nanocuboids and nanocylinders possess larger TPA cross-sections than nanocubes and nanospheres of similar lateral dimension, respectively. Given TPA-allowed transitions, nanocuboids show stronger size dependence than nanocylinders. The size ...

Garlic extracts prevent oxidative stress, hypertrophy and apoptosis in cardiomyocytes: a role for nitric oxide and hydrogen...Garlic extracts prevent oxidative stress, hypertrophy and apoptosis in cardiomyocytes: a role for nitric oxide and hydrogen...

We also aim to study whether nitric oxide (NO) and hydrogen sulfide (H2S) has a role in mediating the medicinal properties of ... Yong QC, Hu LF, Wang S, Huang D, Bian JS: Hydrogen sulfide interacts with nitric oxide in the heart: possible involvement of ... Minamishima S, Bougaki M, Sips PY, Yu JD, Minamishima YA, Elrod JW, Lefer DJ, Bloch KD, Ichinose F: Hydrogen sulfide improves ... Pharmacological blockade of nitric oxide (NO) and hydrogen sulfide (H2S) were used to elucidate the mechanism of action of ...
more infohttps://bmccomplementalternmed.biomedcentral.com/articles/10.1186/1472-6882-12-140

2017 Global Dimethyl sulphide Market:- ElringKlinger, Datwyler Group and  Flowserve Corp - TimeGazette2017 Global Dimethyl sulphide Market:- ElringKlinger, Datwyler Group and Flowserve Corp - TimeGazette

Report on Dimethyl sulphide market also briefs about the factors altering Dimethyl sulphide market policy, Dimethyl sulphide ... Global Dimethyl sulphide market is expected to reach USD XXXX billion in 2022. Global Dimethyl sulphide market is anticipated ... Dimethyl sulphide market on the basis of market region:. 1 Asia-Pacific Dimethyl sulphide market (South-east, India, Korea, ... The Dimethyl sulphide market report covers forecast and analysis for the Dimethyl sulphide market on a global and regional ...
more infohttp://timegazette.com/2017/06/2017-global-dimethyl-sulphide-market-elringklinger-datwyler-group-and-flowserve-corp/

Geological and Geophysical data of field activity L-11-81-WF in Juan de Fuca from 09/04/1981 to 09/15/1981Geological and Geophysical data of field activity L-11-81-WF in Juan de Fuca from 09/04/1981 to 09/15/1981

Metal sulfide deposits on the Juan de Fuca Ridge: Woods Hole, MS, Oceanus, v. 25, no. 3, Deep ocean mining, p. 43-48.,BR, ,HR, ... Special issue, Polymetallic sulfides: Marine Technology Society Journal, v. 16, no. 3, p. 46-53. ,BR, ,HR, Delaney, J.R., Koski ... Hayba, D., Bargar, K., Johnson, H.P., and Clague, D., 1981, Hydrothermal vents and sulfide deposits on the southern Juan de ... Active hydrothermal vents and sulfide deposits on the southern Juan de Fuca Ridge: Boulder, CO, Geology, v. 11, no. 3, p. 158- ...
more infohttps://walrus.wr.usgs.gov/infobank/l/l1181wf/html/l-11-81-wf.fmeta.faq.html

Garlic | University of Maryland Medical CenterGarlic | University of Maryland Medical Center

Cao HX, Zhu KX, Fan JG, Qiao L. Garlic-derived allyl sulfides in cancer therapy. Anticancer Agents Med Chem. 2014;14(6):793-9. ...
more infohttps://www.umm.edu/health/medical/altmed/herb/garlic

Carbonyl sulfide - WikipediaCarbonyl sulfide - Wikipedia

Carbonyl sulfide decomposes in the presence of humidity and bases to carbon dioxide and hydrogen sulfide.[2][3][4] ... Carbonyl sulfide is used as an intermediate in the production of thiocarbamate herbicides.[3] Carbonyl sulfide is a potential ... Carbonyl sulfide is readily converted to the gaseous signaling molecule hydrogen sulfide by carbonic anhydrase enzymes in ... the release of carbonyl sulfide from small organic molecules has been identified as a strategy for delivering hydrogen sulfide ...
more infohttps://en.wikipedia.org/wiki/Carbonyl_sulfide

Cadmium sulfide - WikipediaCadmium sulfide - Wikipedia

Cadmium sulfide can be dissolved in acids.[17] CdS + 2 HCl → CdCl2 + H2S. When solutions of sulfide containing dispersed CdS ... Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a green solid.[4] It occurs in nature with ... Zinc sulfide. Mercury sulfide Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 ... Cadmium sulfide has, like zinc sulfide, two crystal forms. The more stable hexagonal wurtzite structure (found in the mineral ...
more infohttps://en.wikipedia.org/wiki/Cadmium_sulfide

Hydrogen Sulfide | NIOSH | CDCHydrogen Sulfide | NIOSH | CDC

Exposure to hydrogen sulfide may cause irritation to the eyes and respiratory system. It can also cause apnea, coma, ... Hydrogen sulfide (H₂S) is a colorless gas with a strong odor of rotten eggs. ... Hydrogen sulfide (H₂S) is a colorless gas with a strong odor of rotten eggs. Exposure to hydrogen sulfide may cause irritation ... EPA Acute Exposure Guideline Levels: Hydrogen Sulfideexternal icon. *EPA Toxicological Review of Hydrogen Sulfidepdf icon ...
more infohttps://www.cdc.gov/niosh/topics/hydrogensulfide/default.html

dimethyl sulfide (CHEBI:17437)dimethyl sulfide (CHEBI:17437)

... has role marine metabolite (CHEBI:76507) dimethyl sulfide (CHEBI:17437) is a aliphatic sulfide ( ... dimethyl sulfide (CHEBI:17437) has role Escherichia coli metabolite (CHEBI:76971) dimethyl sulfide (CHEBI:17437) has role algal ... dimethyl sulfide (CHEBI:17437) has role bacterial xenobiotic metabolite (CHEBI:76976) dimethyl sulfide (CHEBI:17437) has role ... CHEBI:17437 - dimethyl sulfide. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ...
more infohttps://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:17437

dimethyl sulfide (CHEBI:17437)dimethyl sulfide (CHEBI:17437)

... has role marine metabolite (CHEBI:76507) dimethyl sulfide (CHEBI:17437) is a aliphatic sulfide ( ... dimethyl sulfide (CHEBI:17437) has role Escherichia coli metabolite (CHEBI:76971) dimethyl sulfide (CHEBI:17437) has role algal ... dimethyl sulfide (CHEBI:17437) has role bacterial xenobiotic metabolite (CHEBI:76976) dimethyl sulfide (CHEBI:17437) has role ... CHEBI:17437 - dimethyl sulfide. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ...
more infohttps://www.ebi.ac.uk/chebi/searchId.do?chebiId=17437

magnesium sulphidemagnesium sulphide

The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
more infohttps://webbook.nist.gov/cgi/inchi/InChI%3D1S/Mg.S

Iron sulfideIron sulfide

The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...
more infohttps://webbook.nist.gov/cgi/inchi/InChI%3D1S/Fe.S

Cadmium Sulfide - Drugs.comCadmium Sulfide - Drugs.com

A list of US medications equivalent to Cadmium Sulfide is available on the Drugs.com website. ... Cadmium Sulfide is a medicine available in a number of countries worldwide. ...
more infohttps://www.drugs.com/international/cadmium-sulfide.html

Silver(I) Sulfide | Encyclopedia.comSilver(I) Sulfide | Encyclopedia.com

Source for information on Silver(I) Sulfide: Chemical Compounds dictionary. ... sulfide (SILL-ver one SUL-fide) is a grayish-black heavy powder. Most people are familiar with the compound as tarnish, the ... Silver(I) Sulfide. OVERVIEW. Silver(I) sulfide (SILL-ver one SUL-fide) is a grayish-black heavy powder. Most people are ... The sulfide is roasted in air, converting silver(I) sulfide to silver(I) sulfate. The sulfate can then be treated chemically to ...
more infohttps://www.encyclopedia.com/science/academic-and-educational-journals/silveri-sulfide

Selenium Sulfide: MedlinePlus Drug InformationSelenium Sulfide: MedlinePlus Drug Information

Selenium Sulfide: learn about side effects, dosage, special precautions, and more on MedlinePlus ... Selenium sulfide comes in a lotion and is usually applied as a shampoo. As a shampoo, selenium sulfide usually is used twice a ... Selenium sulfide is for external use only. Do not let selenium sulfide get into your eyes, nose, or mouth, and do not swallow ... Before using selenium sulfide,. *tell your doctor and pharmacist if you are allergic to selenium sulfide or any other drugs. ...
more infohttps://medlineplus.gov/druginfo/meds/a682258.html

Hydrogen SulphideHydrogen Sulphide

... www.ferret.com.au showcases products from suppliers of Hydrogen Sulphide and other related products and services. ...
more infohttp://www.ferret.com.au/t/Hydrogen-Sulphide

Hydrogen Sulfide TestingHydrogen Sulfide Testing

Hydrogen sulfide and mercaptan sulfur, IP104, IP103, UOP 163. *Hydrogen sulfide and sulfur dioxide in aromatic hydrocarbons, ... Additional hydrogen sulfide and sulfur related testing methods are available. H2S management and additive treatment solutions ... Hydrogen Sulfide Testing. Hydrogen sufide testing of crude oil, petroleum products, chemicals and gases. ... Hydrogen sulfide testing measures H2S content in hydrocarbon products, including petroleum, fuels, asphalt, gases and chemicals ...
more infohttp://www.intertek.com/petroleum/h2s-test/

ICSC 1047 -    SODIUM SULFIDE (ANHYDROUS)ICSC 1047 - SODIUM SULFIDE (ANHYDROUS)

Other UN number: 1849, sodium sulfide, hydrated with 30% or more water, hazard class 8, packaging group II.. Other melting ...
more infohttp://www.ilo.org/dyn/icsc/showcard.display?p_lang=en&p_card_id=1047&p_version=2

A BACCARAT SULPHIDE WEIGHT 
 | Christies
        	A BACCARAT SULPHIDE WEIGHT | Christie's

View A BACCARAT SULPHIDE WEIGHT on Christies.com, as well as other lots from the The Henry Stern Collection of Antique Glass ... A BACCARAT SULPHIDE WEIGHT The clear glass set with a profile of the Duke of Orleans depicted in uniform, on a dark-green ...
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Sodium sulfide | Sigma-AldrichSodium sulfide | Sigma-Aldrich

Disodium sulfide; Linear Formula: Na2S; find Aldrich-407410 MSDS, related peer-reviewed papers, technical documents, similar ... to study the cytoprotective and anti-inflammatory effects of hydrogen sulfide in macrophages and mice Na2S is widely used as a ... Cubic crystals of sodium sulfide (Na2S) are extremely hygroscopic in nature and discolor on exposure to air. Na2S is soluble in ... obtain aliphatic and alicyclic γ-keto, γ,γ*-diketo, bis sulfides, thiamono-, and thiabicyclanes by alkylthiomethylation of ...
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Hydrogen sulphide analyserHydrogen sulphide analyser

ENVIRORENT has released the Jerome 631-X hydrogen sulphide analyser, designed to display low-level concentrations in seconds. ... Air Preparation Air Quality Monitoring Air Quality Testing Analysers Hydrogen Sulphide Detectors Hydrogen Sulphide Monitors ... Any hydrogen sulphide in the sample is absorbed by the sensor, which registers a proportional change in electrical resistance. ... The hydrogen sulphide concentration is displayed on the LCD, where it remains until the next sample is taken. ...
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Sulfide - AqueousSulfide - Aqueous

Testing Laboratory providing Environmental testing services. Analysis of air, water, dust, soil, hazardous waste and consumer products.
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Reactivity, SulfideReactivity, Sulfide

Testing Laboratory providing Environmental testing services. Analysis of air, water, dust, soil, hazardous waste and consumer products.
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Sulfide - TotalSulfide - Total

Testing Laboratory providing Environmental testing services. Analysis of air, water, dust, soil, hazardous waste and consumer products.
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  • Silver(I) sulfide occurs naturally as the minerals acanthite and argentitde, from which they can be extracted by grinding, crushing, and washing the mineral ore. (encyclopedia.com)
  • In most ordinary sulfides that contain a semi-metal such as antimony, arsenic or bismuth, they substitute in the sulfur positions, but in sulfosalts they substitute for the metal ions and bond with the sulfurs. (galleries.com)
  • Sulfide does not exist in appreciable concentrations even in highly alkaline water, being undetectable at pH (wikipedia.org)
  • Only minerals in the sulfide class that have no appreciable sulfur are included in these subclasses. (galleries.com)
  • Examples of such naming are selenium disulfide and titanium sulfide, which contains no sulfide ions whatsoever. (wikipedia.org)
  • This is a large segment of the sulfide class whose difference from the other sulfides lies in the position of the semi-metal ions. (galleries.com)
  • http://mineral.galleries.com/minerals/sulfides/acanthit/acanthit.htm (accessed on November 5, 2005). (encyclopedia.com)
  • Volcanoes and hot springs emit some H 2 S, where it probably arises via the hydrolysis of sulfide minerals. (newworldencyclopedia.org)
  • The Sulfide Class minerals comprise an economically important class of minerals. (galleries.com)
  • Minerals belonging to the selenide, telluride, antimonide and arsenide subclasses have very similar properties to the more common sulfides and are thus included here. (galleries.com)
  • 8 MgS + 8 I2 → S8 + 8 MgI2 Sulfur can also be prepared from a sulfide and an appropriate oxidizer: 16 HNO3 + 24 H2S → 16 NO + 3 S8 + 32 H2O Aqueous solutions of transition metals cations react with sulfide sources (H2S, NaHS, Na2S) to precipitate solid sulfides. (wikipedia.org)
  • 2 Li + S → Li2S The THF-soluble triethylborane adduct of lithium sulfide can be generated using superhydride. (wikipedia.org)
  • Na 2 S is widely used as a laboratory reagent in both sulfide and non metallic mineral flotation. (sigmaaldrich.com)
  • The majority of sulfides are metallic, opaque, generally sectile, soft to average in hardness and they have high densities, black or dark-colored streaks, and an igneous origin. (galleries.com)