Chemical groups containing the covalent sulfur bonds -S-. The sulfur atom can be bound to inorganic or organic moieties.
Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.
Inorganic or organic compounds that contain sulfur as an integral part of the molecule.
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.
Hot springs on the ocean floor. They are commonly found near volcanically active places such as mid-oceanic ridges.
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)
Organic and inorganic compounds that contain iron as an integral part of the molecule.
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)
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)
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)
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).
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.
Inorganic salts of sulfuric acid.
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.
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)
The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.
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.
Inorganic compounds that contain zinc as an integral part of the molecule.
A flammable, poisonous gas with a characteristic odor of rotten eggs. It is used in the manufacture of chemicals, in metallurgy, and as an analytical reagent. (From Merck Index, 11th ed)
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Exclusive legal rights or privileges applied to inventions, plants, etc.
NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.
A multifunctional pyridoxal phosphate enzyme. In the final step in the biosynthesis of cysteine it catalyzes the cleavage of cystathionine to yield cysteine, ammonia, and 2-ketobutyrate. EC
Inorganic oxides of sulfur.
Inorganic and organic derivatives of sulfuric acid (H2SO4). The salts and esters of sulfuric acid are known as SULFATES and SULFURIC ACID ESTERS respectively.
The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Frozen water crystals that fall from the ATMOSPHERE.
Methods, procedures, and tests performed to diagnose disease, disordered function, or disability.
Shortened forms of written words or phrases used for brevity.
An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals.
Published materials which provide an examination of recent or current literature. Review articles can cover a wide range of subject matter at various levels of completeness and comprehensiveness based on analyses of literature that may include research findings. The review may reflect the state of the art. It also includes reviews as a literary form.
A systematic statement of policy rules or principles. Guidelines may be developed by government agencies at any level, institutions, professional societies, governing boards, or by convening expert panels. The text may be cursive or in outline form but is generally a comprehensive guide to problems and approaches in any field of activity. For guidelines in the field of health care and clinical medicine, PRACTICE GUIDELINES AS TOPIC is available.
An approach of practicing medicine with the goal to improve and evaluate patient care. It requires the judicious integration of best research evidence with the patient's values to make decisions about medical care. This method is to help physicians make proper diagnosis, devise best testing plan, choose best treatment and methods of disease prevention, as well as develop guidelines for large groups of patients with the same disease. (from JAMA 296 (9), 2006)
Procedures concerned with the remedial treatment or prevention of diseases.
Inorganic compounds that contain cadmium as an integral part of the molecule.
An element with atomic symbol Cd, atomic number 48, and atomic weight 114. It is a metal and ingestion will lead to CADMIUM POISONING.
Poisoning occurring after exposure to cadmium compounds or fumes. It may cause gastrointestinal syndromes, anemia, or pneumonitis.
A cadmium halide in the form of colorless crystals, soluble in water, methanol, and ethanol. It is used in photography, in dyeing, and calico printing, and as a solution to precipitate sulfides. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
Unstable isotopes of cadmium that decay or disintegrate emitting radiation. Cd atoms with atomic weights 103-105, 107, 109, 115, and 117-119 are radioactive cadmium isotopes.
Discussions, descriptions or catalogs of public displays or items representative of a given subject.
An imagined sequence of events or mental images, e.g., daydreams.
A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.

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)

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
Buy sodium sulfide from marketplace. Also knows as sodium sulfide (na2s),disodium monosulfide,na2s,disodium sulphide,sodium sulfide (van),hsdb 772,sodium sulfide\\, anhydrous (dot),ai3-09342,sodium sulfide\\, 90+%\\, pure,sodum sulfuret,na2-s
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.
Tetradecylthioacetic acid (TTA) is a synthetic fatty acid used as a nutritional supplement. TTA acts as a peroxisome proliferator-activated receptor alpha (PPARα) agonist and increases mitochondrial fatty acid oxidation in vitro.[1] In rodent studies, TTA has been reported to have other activities such as reducing inflammation[2] and preventing high fat diet induced adiposity and insulin resistance.[3] In human clinical study, there have been mixed observations in preliminary studies. One Phase I study showed no significant changes in the blood lipids or free fatty acids[4] and another showed that TTA attenuates dyslipidemia in patients with type 2 diabetes mellitus.[1] ...
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, ...
A facile synthesis of structurally diverse 1-chloro-2,2,2-trifluoroethyl sulfides from readily available 1-bromo-1-chloro-2,2,2-trifluoroethane (Halothane®) and various aliphatic and aromatic thiols in the presence of sodium dithionite/sodium bicarbonate is described. The synthetic utility of the prepared sulfides is illustrated by the synthesis of biologically potent heterocycles and by their electrophilic reactions with thiophene.. ...
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
Nanoscopic investigation of the self-assembly process of dialkyl disulfides and dialkyl sulfides on Au(111). Variable energy x-ray photoemission studies of alkylsilane based monolayers on gold
With the development of science and technology, new applications about nanoparticles should be explored to achieve full-scale knowledge. Therefore, in this work, the toxicity and potential application of raw cadmium sulfide nanoparticles (CdS) in vivo were further studied through ICP-OES and CTs. Surprisingly, CdS exhibited an excellent photographic property, except for finding the accumulation of CdS in the lungs, liver, spleen, and kidney with a strong dependence on time; it is also found that there were a significant uptake in the pancreas for an obvious CT imaging. And the following investigations showed that the raw CdS could damage the tissues accumulating nanoparticles. Through this work, it can be seen that the raw CdS being modified might be an excellent photographic developer for detecting cancers or other diseases.
Sodium sulfide nonahydrate, ACS, 98.0% min, Alfa Aesar™ 250g Sodium sulfide nonahydrate, ACS, 98.0% min, Alfa Aesar™ Inorganic Sodium Compounds
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 ...
Studies on Biological Methylation; A Precursor of the Dimethyl Sulphide Evolved by Polysiphonia Fastigiata; dimethyl-2-carboxyethylsulphonium Hydroxide and Its Salts
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.
TY - JOUR. T1 - Fungal pretreatment of sulfides in refractory gold ores. AU - Ofori-Sarpong, G.. AU - Osseo-Asare, Kwadwo Asare. AU - Tien, Ming. PY - 2011/5/1. Y1 - 2011/5/1. N2 - This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores. The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation solutions, and for sulfide sulfur in the residual solids. The results were then expressed as percentages of the initial weights. For arsenopyrite, 1.5 wt.%, 7.2 wt.% and 10.3 wt.% of iron, arsenic and sulfur respectively were present as soluble constituents in the incubation solution within 21 days of fungal treatment, whereas for pyrite, there was 1.2 wt.% iron and 6.0 wt.% sulfur. For the same processing period in the case of the flotation concentrate, 1.8 wt.%, 6.1 wt.% and ...
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 ...
TY - JOUR. T1 - Catalysis by Mo-based Monometallic and Bimetallic Carbides and Sulfides for Simultaneous Hydrodesulfurization, Hydrodenitrogenation, and C-C Hydrogenolysis. AU - Song, Chunshan. AU - Wang, Weilin. AU - Wei, Boli. AU - Oyama, S. Ted. AU - Schwartz, Viviane. PY - 2003/3. Y1 - 2003/3. N2 - Molybdenum based sulfide catalysts are widely used in hydroprocessing of petroleum fractions in refining industry. Multi-probe molecular reactions for simultaneous HDS, HDN, and C-C hydrogenolysis over Mo-based monometallic and bimetallic carbide and sulfide catalysts, in conjunction with the work on single-probe molecular reactions were presented. A multi-component model-feedstock was used to test catalytic functions. These reactions were precisely those involved in the conversion and processing of heavy hydrocarbon resources such as heavy oil, coal, and other residual materials. The multi-component feed includes 4-(1-naphthylmethyl)bibenzyl, dibenzothiophene, quinoline, pyrene, and eicosane. ...
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.. ...
Get Sulfides Spectrum Chemical. carries a full line of fine chemicals, lab appliances and lab supplies. Spectrum Chemical offers fine chemicals in lab and production sizes.
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. ...
Dive into the research topics of Transport Properties of Bi,sub,2,/sub,S,sub,3,/sub, and the Ternary Bismuth Sulfides KBi,sub,6.33,/sub,S,sub,10,/sub, and K,sub,2,/sub,Bi,sub,8,/sub,S,sub,13,/sub,. Together they form a unique fingerprint. ...
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 East 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...
A mixed kinetics dump leaching model for ores containing a variety of copper sulfide minerals / by B.W. Madsen and M.E. Wadsworth ...
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. ...
lments of pyrite fes_Mineralogy of Sulfides ElementsMineralogy of Sulfides ... a general formula A m T n X p and in which the common elements are A = Ag ... along the c-axis direction in pyrite (FeS 2 ...Iron disul
The study procedure was based on OECD Guideline No. 218 (2004). The batch of TPS 32 (polysulfides, di-tert-dodecyl) tested was a clear yellow liquid. Based on the results of the range-finding test, a final test was performed with concentrations ranging from 100 to 1000 mg/kg d.w., increasing with a factor of 1.8. Furthermore, a blank-control and a solvent-control were included. The test concentrations were prepared by mixing spiked sand, after evaporation of the solvent, with sediment. A bulk amount was prepared and distributed over the replicates. In total 80 larvae per group (20 per replicate/4 replicates) were exposed to the controls (blank and solvent-control) and theTPS 32 (polysulfides, di-tert-dodecyl) concentrations. The total test period was 28 days. On days 0 and 28 samples for analysis were taken from overlying water, pore water and sediment from the concentrations. The results of analysis at the start and at the end of the final test showed that the measured concentrations in ...
The potential toxicity of Di-tert-butyl polysulfides (TPS 44) was evaluated following daily oral administration (gavage) to rats for4 weeks. On completion of the treatment period, designated animals were held fora 2-week treatment-free period in order to evaluate the reversibility of any findings. The study was performed according to OECD(No. 407, 03 October 2008) and Commission Regulation (EC) (No. 440/2008, B.7, 30 May 2008)guidelines and in compliance with the principles of Good Laboratory Practice Regulations. One group of ten male and ten female Sprague-Dawley rats received Di-tert-butyl polysulfides (TPS 44) daily by gavage at dose-level of 300 mg/kg/day for 4 weeks. Two other groups of five males and five females received TPS 44 at 33 or 100 mg/kg/day under the same experimental conditions. A further group of ten males and ten females received the vehicle alone (0.5% carboxymethylcellulose in purified water) under the same experimental conditions, and acted as a control group.The dosage ...
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.
Send Inquiry to Goodtime Clock (yantai) Co. Ltd. - We are leading Manufacturer of Sodium Sulfide, Clock, Watches, barite powder coating, thermosetting powder coating from YANTAI China.
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.
Shaanxi Fuhua Trading Co., Ltd - Because sodium sulfide is used in a wide range of applications, and each industry pays attention to
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. ...
Close The Infona portal uses cookies, i.e. strings of text saved by a browser on the users device. The portal can access those files and use them to remember the users data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser. ...
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 ...
d25 1 .0583 4 1-1n 28.04 (found); 28.34 (calc.) C 45.52 (.found); 46.12 (calc.) % H 8 .07 (found); 7 .74 (cal e.) b Synthesis er l-ethylthio2,3-epo x y prop ne (~) A solution of 19 grams of 85% potassium hydroxide in 40 ml. of water was placed in a 200 ml.,, thre e -necke d round-ottomed f lask, equi ped with thermometer, stirrer, and drOfPing funnel. To the vj_gorously stirred, cooled solution was added tlropwise 0.11 mole (17 g.) or l -ethylthio3 -chloro2 -propanol. A fter stir-:ring for t1to hours following ddition of the chlorohydroxysulfide, the mixture was extracted twice with ethyl ether, the combined extracts dried over a!)hydrous calcium sulfate, nd the dried ethereal solution distilled; 7 grams (54~) of 1 -ethylthio-2 3 -epoxypropane was obtained. (2) A solution of two les (82 g.) of s o ium hydro x ide in 300 ml. of water was p laced in a one 1., three-necke d round-bottomed flask, e uipped with stirrer, re~lux conden ser, and dropping funnel. The flas was eooled in ice slush and ...
Regioselective cyclocondensation reactions of 1,3-bis(silyl enol ethers) with different electrophiles provide a convenient approach for the synthesis of 5-chlorosalicylates, arylphosphonates, 5-cyanosalicylates, 5-arylthio- and 5-benzylthio-6-phenylsalicylates, benzo[c]chromen-6-ones and chromeno[3,4-b]pyrrol-4(3H)-ones.
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 ...
Diallyl sulfide (DAS), diallyl disulfide (DADS) and diallyl trisulfide (DATS) are major oil-soluble organosulfur compounds of garlic responsible for most of its pharmacological effects. The present study investigated the influence of repeated intraperitoneally (ip) administration of DAS, DADS and DATS on the total level of sulfane sulfur, bound sulfur (S-sulfhydration) and hydrogen sulfide (H2S) and on the activity of enzymes, which catalyze sulfane sulfur formation and transfer from a donor to an acceptor in the normal mouse kidney, i.e., γ-cystathionase (CSE) and rhodanese (TST). The activity of aldehyde dehydrogenase (ALDH), which is a redox-sensitive protein, containing an -SH group in its catalytic center, was also determined. The obtained results indicated that all tested compounds significantly increased the activity of TST. Moreover, DADS and DATS increased the total sulfane sulfur level and CSE activity in the normal mouse kidney. ALDH activity was inhibited in the kidney after DATS
There are comments on PubPeer for publication: Diallyl trisulfide (DATS) abrogates arsenic induced testicular oxidative stress in rats (2014)
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 ...
Epigenetic upregulation of metallothionein 2A by diallyl trisulfide enhances chemosensitivity of human gastric cancer cells to docetaxel.
China Sodium Hydrosulfide supplier, Ammonium Thiocyanate, Sodium Sulfide Manufacturers/ Suppliers - Qixian County Dongfang Chemical Co., Ltd.
Good-Rite® Sodium Hydrosulfide (NaSH) is a clear, aqueous solution that is used as a depilotory (de-hairing) agent in the tanning industry.
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.
The large sulfur isotope fractionations are best explained by a combination of mechanisms. First, a pH-dependent isotope effect can partially explain the observation with DA. It has been shown that the light [sulfur-32 (32S)] and heavy (34S) isotopes of sulfur quickly exchange between the two major sulfide species, dihydrogen sulfide (H2S) and monohydrogen sulfide (HS−), in the pH range of the experiment and reach an isotope equilibrium where H2S is +6‰ enriched relative to HS− (12, 13). Since MSO uses H2S as a substrate as opposed to HS− (14), the relative speciation of sulfide, which is pH dependent [pKa (where Ka is the acid dissociation constant) = 6.89], will have an important consequence on the resulting sulfur isotope enrichment. For example, at pH 7 where H2S accounts for 50% of the sulfide, phototrophic sulfide oxidizers consume H2S and produce elemental sulfur (S0). The H2S is +6‰ enriched in 34S relative to HS− but is only +3‰ enriched relative to the bulk sulfide. Thus, ...
The report presented here provides a detailed and an accurate account of each aspect of the global Liquid Sodium Hydrosulfide market to help players to better face market challenges and gain a competitive edge over other market participants.
UAB Public Health Specialist, Dr. Lisa McCormick said the vapors from sodium hydrosulfide can be toxic and irritating to your respiratory system and can cause burns to your skin and eyes.
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
David I. Groves, Trudi Marchant, S. Maske, R. Grant Cawthorn; Compositions of ilmenites in Fe-Ni-Cu sulfides and host rocks, Insizwa, southern Africa; proof of coexisting immiscible sulfide and silicate liquids. Economic Geology ; 81 (3): 725-731. doi: Download citation file:. ...
Page contains details about zinc sulfide/cadmium sulfide nanocrystals . It has composition images, properties, Characterization methods, synthesis, applications and reference articles :
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 ...
Science and Education Publishing, publisher of open access journals in the scientific, technical and medical fields. Read full text articles or submit your research for publishing.
A convenient one-pot approach for the synthesis of aryl sulfides through the coupling of thiols with Grignard reagents in the presence of N-chlorosuccinimide is described. The sulfenylchlorides were formed when thiols were treated with N-chlorosuccinimide, and the resulting sulfenylchlorides were then directly reacted with Grignard reagents to provide aryl sulfides in good to excellent yields under mild reaction conditions. Functional groups including ester, fluoro and chloro are tolerated by the reaction conditions employed. It is important to note that this method has a short reaction time (30 min in total), and represents an alternative approach for the synthesis of aryl sulfides over the existing protocols ...
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 ...
This topic has 2 study abstracts on Diallyl sulfide indicating that it may have therapeutic value in the treatment of Androgen Deficiency, Cadmium Poisoning, and Testicular Diseases
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 website.
Colorless when pure; isometric; ZnS; mol wt, 97.43; sp gr, 4.102 at 25 degrees C, and ranges from 3.90 to 4.11; Mohs hardness, 3.5 to 4.0; luster, resinous to adamantine; transformation temperature to alpha zinc sulfide, 1,020+ or -5 degrees C; sublimes at 1,180 degrees C or 1,185 degrees C; melting point, 1,850 degrees C (at 150 atm or 15.2 MPa); insoluble in water; and very soluble in acids. Occurs as the mineral sphalerite, which is nearly colorless, white, yellow, red, green, brown, and black; has perfect dodecahedral cleavage; and is soluble in hydrochloric acid. Sphalerite is the principal ore of zinc, a source of cadmium, and a source of sulfur for manufacturing sulfur dioxide, sulfuric acid, and other sulfur compounds. Also called sphalerite; zinc blende; zincblende; blende; black jack. See also:sphalerite; alpha zinc sulfide CCD, 2; Handbook of Chemistry and Physics, 2; Dana, 2 Source: Dictionary of Mining, Mineral, and Related Terms ...
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
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 ...
A series of 6-endo-(methylthio)-bicyclo[2.2.1]heptane-2-endo-proline amides was synthesized to study the neighboring proline amide participation in electron transfer from thioethers. The thioether with endo-pyrrolidine amide formed a two-center three-electron SO bond after one electron oxidation and the oxidation potential of the thioether was lowered by 530 mV and 330 mV compared to the corresponding exo-pyrrolidine amide and the primary amide analogues, respectively. The thioether with a proline methyl ester showed the oxidation potential of 410 mV higher than that of the pyrrolidine amide. The basis for this surprising result was revealed by an X-ray crystallographic structure study of the diastereomerically pure proline methyl ester which showed amide carbonyl n → methyl ester π* interaction which removes electron density from the neighboring amide which results in less effective neighboring amide participation in thioether oxidation. This accounts for the electrochemical result. A potent ...
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.
Carbonates are known as rock-forming minerals, while the remaining groups are often ore minerals. Calcite and dolomite are two of the most important carbonates. Pyrite is the only sulfide that commonly occurs in rocks. Sulfides are significant economic minerals that provide the main source of elements such as zinc, mercury, nickel, lead, molybdenum, copper and arsenic.. Non-silicate minerals constitute less than 10 percent of the Earths crust. Carbon is found in diamond and graphite form. The carbonates, sulfides and oxides are the most common non-silicates. A few elements exist in pure form, such as gold, silver, lead, arsenic, copper, tellurium and bismuth. Many of the non-silicates are considered economically important, particularly those that include valuable metals. Some non-silicates are valued as gems due to their beauty, color and hardness.. ...
Higher dissolved ion yields and higher SO4:Na and Ca:Na ratios together suggest that sulfide and carbonate dissolution rates are enhanced in association with glacial weathering. To first order, glaciation thus appears to act as a CO2 source, by maintaining total solute fluxes while shifting weathering toward reactions that release rather than consume CO2.. In principle, glacially enhanced Ca and SO4 fluxes could derive from preferential dissolution of sulfate-bearing evaporites or weathering of Ca-bearing silicates by sulfuric acid, reactions that would not act as CO2 sources. We have no a priori reason to expect that such effects dominate globally. Nonetheless, fully understanding the net effect of glaciation on the carbon cycle depends on quantifying (i) the proportion of the dissolved sulfate derived from sulfide mineral oxidation, and (ii) the extent to which this oxidative flux of protons (Eq. 4) is balanced by alkalinity generation from silicate and carbonate weathering (Eqs. 1 and 2). To ...
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 gold-deposited cadmium sulfide nanorods . It has composition images, properties, Characterization methods, synthesis, applications and reference articles :
article{2ddc0b78-97f7-4941-99e6-756e9186aa01, abstract = {,p,The Lower to Middle Ordovician Tøyen Shale in southern Sweden, a biostratigraphically well-dated siliciclastic mudstone unit, shows 18 distinct authigenic cements that include sulfides, carbonates, silicates, clays, and phosphates. Marcasite, sphalerite, galena, and six texturally distinct types of pyrite characterize the sulfides whereas only one type of dolomite and three different generations of calcite are observed in this unit. Quartz, phosphate, and organic matter occur as only one generation each. Authigenic clay minerals are represented by chlorite and kaolinite. The paragenetic sequence of cements is subdivided into the two pre-burial carbonates, succeeded by ten relatively early burial cements, and six late burial cements, the kaolinite being the latest of them all and potentially being of Cretaceous age. Based on textural relationships, the paragenetic sequence of alterations started with dolomite precipitation followed by ...
Transition Metal Sulfides (TMS), such as molybdenum disulfide (MoS.sub.2), are the petroleum industrys workhorse catalysts for upgrading heavy petroleum feedstocks and removing sulfur, nitrogen and other pollutants from fuels. We have developed an improved synthesis technique to produce SLTMS catalysts, such as molybdenum disulfide, with potentially greater activity and specificity than those currently available. Applications for this technology include heavy feed upgrading, in-situ catalysis, bio-fuel conversion and coal liquefaction.
Ag2S/Ag hetero-nanostructure has been produced by a simple one-stage chemical deposition from aqueous solutions of silver nitrate, sodium sulfide, and sodium citrate with the use of monochromatic light irradiation. For simultaneous synthesis of Ag2S and Ag nanoparticles, deposition has been performed from reaction mixtures with reduced sodium sulfide concentration. The formation of Ag2S/Ag nanocomposite structures is confirmed by X-ray analysis, high-resolution electron microscopy, energy dispersion analysis and dynamic light scattering methods. It is established that in the contact layer between silver sulfide and silver, non conducting α-Ag2S acanthite transforms into superionic β-Ag2S argentite under the action of external electric field. The scheme of the operation of a resistive switch based on an Ag2S/Ag hetero-nanostructure is proposed.
A sulfoxide, R−S(O)−R, is the S-oxide of a sulfide ("sulfide oxide"), a sulfone, R−S(O)2−R, is the S,S-dioxide of a sulfide, a ... Sulfides[edit]. Sulfides, formerly known as thioethers, are characterized by C−S−C bonds[3][4] Relative to C−C bonds, C−S bonds ... Thiocarbonyl ylides (RR′C=S+−C−−RR′) can form by ring-opening of thiiranes, photocyclization of aryl vinyl sulfides,[23] as ... Sulfides are typically prepared by alkylation of thiols. They can also be prepared via the Pummerer rearrangement. In one named ...
Best known perhaps is nominally iron(II) sulfide (the mineral pyrrhotite) with a composition Fe(1-x)S (x = 0 to 0.2). The rare ... At high temperatures (1000 °C), titanium sulfides present a series of non-stoichiometric compounds.[1]:679 ... Many metal oxides and sulfides have non-stoichiometric examples; for example, stoichiometric iron(II) oxide, which is rare, has ...
"Sulfides." Simon & Schuster's Guide to Rocks and Minerals. New York: Simon & Schuster, 1977. Entry 44. Print. Mineralienatlas ... Boulangerite is a sulfosalt mineral, lead antimony sulfide, formula Pb5Sb4S11. It was named in 1837 in honor of French mining ...
... sulfide, Bi. 2S. 3, occurs naturally in bismuth ores.[45] It is also produced by the combination of molten bismuth and ... Oxides and sulfides[edit]. At elevated temperatures, the vapors of the metal combine rapidly with oxygen, forming the yellow ... I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 978-0-9622097-0-3. . Retrieved 5 ... Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. The free element is 86% ...
Hydrogen sulfide emissions[edit]. A severe anoxic event at the end of the Permian would have allowed sulfate-reducing bacteria ... Evidence for widespread ocean anoxia (severe deficiency of oxygen) and euxinia (presence of hydrogen sulfide) is found from the ... Models also show that anoxic events can cause catastrophic hydrogen sulfide emissions into the atmosphere (see below).[138] ... Upwelling of this water may have released massive hydrogen sulfide emissions into the atmosphere and would poison terrestrial ...
... "the sulfides of titanium are unstable and tend to hydrolyze to the oxide with release of hydrogen sulfide. ... Oxides, sulfides, and alkoxides. The most important oxide is TiO2, which exists in three important polymorphs; anatase, ... Titanium forms a variety of sulfides, but only TiS2 has attracted significant interest. It adopts a layered structure and was ...
Sulfides, Polysulfides, and Sulfanes" in Ullmann's Encyclopedia of Industrial Chemistry Ludwig Lange and Wolfgang Triebel, 2000 ... D. R. Brush (2000). "Sodium Sulfides". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1915040902211908 ... it is converted to hydrogen sulfide and elemental sulfur. Treatment with alkylating agents gives organic polysulfides. In one ...
The Limonene Sulfides". Journal of the American Chemical Society. 81 (13): 3430-3434. doi:10.1021/ja01522a069. Mann, J. C.; ...
ETS Laboratories (15 May 2002). "Sulfides in Wine". Archived from the original on 19 February 2008. Gómez-Míguez, M. José; ... hydrogen sulfide). Some varieties can also exhibit a mineral flavor due to the presence of water-soluble salts as a result of ...
Determination of sulfides and hydrogensulfides[edit]. Although the sulfide content in sample can be determined straight ... Note that for the best results, the sulfide solution must be dilute with the sulfide concentration not greater than 0.01 M. [2] ... The reducing agent used does not necessarily need to be thiosulfate; stannous chloride, sulfites, sulfides, arsenic(III), and ...
Sulfide minerals[edit]. The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest ... usually by microbial action on sulfide ores), or by damaging aquatic wildlife that rely on clear water (vs suspensions).[10] ... environmental liability of the mining industry".[2] These tailings contain large amounts of pyrite (FeS2) and Iron(II) sulfide ...
Many iron sulfide minerals may exist in the transition between poorly ordered mackinawite and crystalline pyrite such as ... Cahill, C.L.; Benning, L.G.; Barnes, H.L.; Parise, J.B. (2000). "In situ time-resolved X-ray diffraction of iron sulfides ... Wuensch, B.J.; Prewitt, C.T.; Rajamani, V.; Scott, S.D.; Craig, J.R.; Barton, P.B. (1974). Sulfide Mineralogy: Short Course ... Mackinawite is an iron nickel sulfide mineral with the chemical formula (Fe,Ni) 1+xS (where x = 0 to 0.11). The mineral ...
Pankratz, L. B.; A. D. Mah; S. W. Watson (1987). "Thermodynamic Properties of Sulfides". U. S. Bureau of Mines Bulletin. 689. ...
Scheele's analysis showed that the chemical compounds molybdenum sulfide (molybdenite), lead(II) sulfide (galena) and graphite ... I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 978-0962209703. Sutphin, David M ...
Sulfide Minerals". Mineralogy Database. Retrieved 2019-09-21. "Nickel-Strunz Classification - Sulfides". Mineralogy Database. ... Arsenides are grouped with the sulfides in both the Dana and Strunz mineral classification systems. algodonite Cu6As domeykite ...
I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 978-0-9622097-0-3. Retrieved ... Mercury occurs in deposits throughout the world mostly as cinnabar (mercuric sulfide). The red pigment vermilion is mostly ... Elemental bismuth may occur naturally uncombined, although its sulfide and oxide form important commercial ores. The free ...
... is an iron sulfide mineral with the chemical formula Fe2+ Fe3+ 2S 4. It is the sulfur equivalent of the iron oxide ... I (Elements, Sulfides, Sulfosalts). Chantilly, VA, US: Mineralogical Society of America. ISBN 0962209708. Retrieved December 5 ... Vaughan, D. J.; Craig, J. R. "Mineral Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978. ISBN 0-521- ... silts and arkosic sand often in varved sulfide rich clays. It is also found in hydrothermal veins. Greigite is formed by ...
doi:10.1016/0022-4596(90)90273-Z. Vaughan, David J.; Craig, James R. (1978). Mineral chemistry of metal sulfides. Cambridge ...
Other low shear strength materials: fluorides of calcium, lithium, barium, and rare earths; sulfides of bismuth and cadmium; ...
It is also has a Strunz classification of 02.CB.05a, as a metal sulfide with gold, silver, iron, copper and other metals. The ... Volume I: Elements, Sulfides, Sulfosalts. Mineral Data Publishing. Tucson, Arizona. p. 105. ISBN 0962209708. Coloradoite. ...
Wolfgang Sand; Edgardo R. Donati (2007). Microbial processing of metal sulfides. Berlin: Springer. ISBN 978-1-4020-5589-8. " ... Mineral-Sulfide-Oxidizing Acidophiles". Applied and Environmental Microbiology. 73 (13): 4294-4299. doi:10.1128/AEM.02658-06. ...
Synthetic iron sulfide was used with copper sulfide to create the photovoltaic material. More recent efforts are working toward ... By Georgius Agricola's time, c. 1550, the term had become a generic term for all of the sulfide minerals. Pyrite is usually ... The mineral pyrite (/ˈpaɪraɪt/), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2 ( ... At the time when the term became common in jewelry making, "marcasite" referred to all iron sulfides including pyrite, and not ...
It can be prepared by the reaction of 1,5-dibromopentane with sodium sulfide: Br-(CH2)5-Br + Na2S → (CH2)5S + 2NaBr E. V. ... Cyclic Sulfides" J. Am. Chem. Soc., 1951, volume 73, pp 3632-3635. doi: 10.1021/ja01152a022 v t e. ...
X. Sulfides and ox\-sulfides". Acta Crystallographica. 2 (5): 291-6. doi:10.1107/s0365110x49000758. Charvillat, J. P.; Benedict ... Chalcogenides A wide variety of neptunium sulfide compounds have been characterized, including the pure sulfide compounds NpS, ... All of the neptunium sulfides except for the β and γ forms of Np2S3 are isostructural with the equivalent uranium sulfide and ... Of these, Np2S3, prepared by reacting NpO2 with hydrogen sulfide and carbon disulfide at around 1000 °C, is the most well- ...
Selenium sulfide is also known to reduce dryness of scalp and folliculitis. Systemic toxicity can appear if it is applied to ... Selenium sulfide slows down epidermal proliferation. It is fungicidal to Pityrosporum ovale. It also acts as an anti- ... Like selenium sulfide, zinc pyrithione (a zinc complex with two chelating pyrithione anions) also reduces epidermal turnover ... "Selenium Sulfide". Mediline Plus. Retrieved 9 August 2012. CS1 maint: discouraged parameter (link) Sheldon, Lynne. "Uses of ...
According to electron diffraction, the C-C and C-S distances in ethylene sulfide are respectively 1.473 and 1.811 Å. The C-C-S ... Thiirane, more commonly known as ethylene sulfide, is the cyclic chemical compound with the formula C2H4S. It is the smallest ... Thiirane is also used to describe any derivative of the parent ethylene sulfide. ... "Ethylene Sulfide". Encyclopedia of Reagents for Organic Synthesis. John Wiley & Sons. doi:10.1002/047084289X.re079.pub2.CS1 ...
Selenium sulfide is also used to treat tinea versicolor, a fungal infection of the skin. Deep Cleansing was launched by Chattem ... More specifically, selenium sulfide, an anti-infective agent, relieves itching and flaking of the scalp and removes the dry, ... "Selenium Sulfide". PubMed Health. National Center for Biotechnology Information, U.S. National Library of Medicine. Retrieved ... Over the counter Selsun Blue contains 1% selenium sulfide as its active ingredient in its most popular version (the word " ...
Instead, they can use sulfur in the form of sulfide, or thiosulfate (as well, some species can use H2, Fe2+, or NO2−) as the ... This anoxic environment with light and sufficient sulfide availability is ideal for purple sulfur bacteria. A study done at the ... Harmful compounds such as methane, a greenhouse gas, and hydrogen sulfide, a pungent, toxic compound, can be found in ... If sufficient sulfate is present to support sulfate reduction, the sulfide, produced in the sediments, diffuses upward into the ...
This produces zinc sulfide, together with large amounts of hot gas, heat, and light. Zinc sheet metal is used to make zinc bars ... Zinc sulfide (ZnS) is used in luminescent pigments such as on the hands of clocks, X-ray and television screens, and luminous ... Sulfides formed as the crust solidified under the reducing conditions of the early Earth's atmosphere. Sphalerite, which is a ... This may refer to small quantities of zinc that is a by-product of smelting sulfide ores. Zinc in such remnants in smelting ...
Zinc sulfide (or zinc sulphide) is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found ... Cadmium sulfide. Mercury sulfide Except where otherwise noted, data are given for materials in their standard state (at 25 °C [ ... Zinc sulfide is a common pigment, sometimes called sachtolith. When combined with barium sulfate, zinc sulfide forms lithopone. ... Wikimedia Commons has media related to Zinc sulfide.. *Zinc and Sulfur at The Periodic Table of Videos (University of ...
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 ...
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 ...
... lead sulfide and dimethyl sulfide. Hydrogen sulfide (H2S) and bisulfide (SH−) are the conjugate acids of sulfide. The sulfide ... 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 ... Examples of such naming are selenium disulfide and titanium sulfide, which contains no sulfide ions whatsoever. "sulfide(2−) ( ...
... 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. ...
This produces toxic gas (hydrogen sulfide). Formula: CdS. Molecular mass: 144.5 Sublimation point: 980°C Density: 4.8 g/cm³. ... Welding and soldering of surfaces treated with cadmium sulfide release highly toxic cadmium oxide which may cause acute lung ...
Carbonyl sulfide can also be called carbon oxide sulfide and carbon oxysulfide. ... Carbonyl sulfide is a colorless gas with a sulfur odor; it does not have an odor when it is free from impurities. ... What is carbonyl sulfide? Carbonyl sulfide is a colorless gas with a sulfur odor; it does not have an odor when it is free from ... Carbonyl sulfide can remain in the air for 2-10 years. * Carbonyl sulfide reacts with water to form carbon dioxide and hydrogen ...
hydrogen sulfide, chemical compound, H2S, a colorless, extremely poisonous gas that has a very disagreeable odor, much like ... hydrogen sulphide Colourless, poisonous gas (H2S) with the smell of bad eggs. It is produced by decaying matter, found in crude ... ... ...
Just a few breaths of air containing high levels of hydrogen sulfide gas can cause death. Lower, longer-term exposure can cause ... Hydrogen sulfide occurs naturally and is also produced by human activities. ... What is hydrogen sulfide? Hydrogen sulfide is a flammable, colorless gas that smells like rotten eggs. People usually can smell ... What happens to hydrogen sulfide when it enters the environment?. * Hydrogen sulfide can be released into air, water, and soil ...
Hydrogen sulfide. CAS No: 7783-06-4. NOTE:. (1) Efficacy of Medical Tests has not been evaluated.. (2) NIOSH references include ... Hydrogen sulfide. Editor(s). /Author(s). Specific Medical Test(s) or Examination(s). Reference(s). ...
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. CS1 maint: discouraged parameter (link) "Sulphide ... 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. ...
The amount of diethyl sulfide produced can be controlled by varying the ratio of hydrogen sulfide to ethylene. Diethyl sulfide ... Diethyl sulfide is a Lewis base, classified as a soft ligand (see also ECW model).Its relative donor strength toward a series ... Diethyl sulfide is a by-product of the commercial production of ethanethiol, which is prepared by the reaction of ethylene with ... Diethyl sulfide is an organosulfur compound with the chemical formula (C 2H 5) 2S. It is a colorless, malodorous liquid. ...
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. ...
Other UN number: 1849, sodium sulfide, hydrated with 30% or more water, hazard class 8, packaging group II.. Other melting ...
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 ...
A list of US medications equivalent to Cadmium Sulfide is available on the website. ... Cadmium Sulfide is a medicine available in a number of countries worldwide. ...
Hydrogen sulphide; Hydrogen sulfide (H2S); Acide sulfhydrique; Hydrogene sulfure; Idrogeno solforato; Rcra waste number U135; ... Other names: Dihydrogen monosulfide; Dihydrogen sulfide; Hydrosulfuric acid; Stink damp; Sulfur hydride; Sulfureted hydrogen; ...
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 ...
... copper sulfide. Students will also get the chance to see some of the allotropes of sulfur. ... copper sulfide. Students will also get the chance to see some of the allotropes of sulfur. ... copper sulfide. Students will also get the chance to see some of the allotropes of sulfur. ...
View A BACCARAT SULPHIDE WEIGHT on, 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 ...
Hydrogen Sulfide in Industry. This document describes the dangers of hydrogen sulfide (H2S) in the workplace, and how to avoid ... Hydrogen sulfide. Hydrogen sulfide is a dangerous toxic gas found in many industries. At low concentrations it causes health ... Hydrogen sulfide is a by-product in many different industries. Some common sources of the gas are: Sewage systems *Anywhere ... Hydrogen sulfide is heavier than air and will settle into low areas. In confined spaces it can quickly reach lethal ...
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 ...
Sulfides can also be removed from slurries, such as oil field drilling muds, and analyzed by the use of the gas train. This ... The method of sulfide analysis by selective ion electrode is examined, and an additional step which can be applied to all ... Sample pretreatment with a gas train following careful sampling methods improves the reliability of all the sulfide methods and ... sulfide methods is described. This additional step removes interferences to the iodine titration and, at the same time, places ...
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 ...
... a sulfide of sodium; especially : a crystalline compound Na2S usually obtained by heating sodium sulfate with coal or hydrogen ... Resources for sodium sulfide. Time Traveler: Explore other words from the year sodium sulfide first appeared Time Traveler! ... Comments on sodium sulfide. What made you want to look up sodium sulfide? Please tell us where you read or heard it (including ... Post the Definition of sodium sulfide to Facebook Share the Definition of sodium sulfide on Twitter ...
Hydrogen sulfide definition, a colorless, flammable, water-soluble, cumulatively poisonous gas, H2S, having the odor of rotten ... Words nearby hydrogen sulfide. hydrogen ion, hydrogenize, hydrogenolysis, hydrogenous, hydrogen peroxide, hydrogen sulfide, ... Hydrogen sulfide is used in the petroleum, rubber, and mining industries, and in making sulfur. Chemical formula: H2S. ... Vents in the rocks and ground were releasing more than 500 parts per million of hydrogen sulfide - levels that could cause ...
Hydrogen sulfide (H2 S) is a colorless, flammable gas that has strong odor of rotten eggs. H2 S poisoning is a rarity, mainly ... encoded search term (Hydrogen Sulfide Toxicity) and Hydrogen Sulfide Toxicity What to Read Next on Medscape ... and sulfur springs also produces hydrogen sulfide. In nature, hydrogen sulfide can be found in caves, sulfur springs, ... Hydrogen Sulfide Toxicity. Updated: Nov 16, 2019 * Author: Chip Gresham, MD, FACEM; Chief Editor: Michael A Miller, MD more... ...
  • Just a few breaths of air containing high levels of hydrogen sulfide can cause death. (
  • Workers on farms with manure storage pits or landfills can be exposed to higher levels of hydrogen sulfide. (
  • On the other hand, low levels of hydrogen sulfide are associated with high blood pressure, Parkinson's disease and Alzheimer's disease, it said. (
  • A proposed ASTM International standard will protect worker's healthby monitoring the levels of hydrogen sulfide gas in workplace air. (
  • How might I be exposed to hydrogen sulfide? (
  • You might be exposed to hydrogen sulfide from breathing contaminated air or drinking contaminated water. (
  • There is very little information on possible health problems in children who have been exposed to hydrogen sulfide. (
  • The silver present in electric contacts exposed to hydrogen sulfide gas may begin to grow long filaments known as silver whiskers . (
  • Zinc sulfide (or zinc sulphide ) is an inorganic compound with the chemical formula of ZnS. (
  • In its dense synthetic form, zinc sulfide can be transparent , and it is used as a window for visible optics and infrared optics. (
  • Zinc sulfide, with addition of few ppm of suitable activator , exhibits strong phosphorescence (described by Nikola Tesla in 1893 [3] ), and is currently used in many applications, from cathode ray tubes through X-ray screens to glow in the dark products. (
  • Copper-doped zinc sulfide ("ZnS plus Cu") is used also in electroluminescent panels. (
  • Zinc sulfide is also used as an infrared optical material, transmitting from visible wavelengths to just over 12 micrometers . (
  • It is made as microcrystalline sheets by the synthesis from hydrogen sulfide gas and zinc vapour, and this is sold as FLIR -grade (Forward Looking Infrared), where the zinc sulfide is in a milky-yellow, opaque form. (
  • Zinc sulfide is a common pigment , sometimes called sachtolith. (
  • When combined with barium sulfate, zinc sulfide forms lithopone . (
  • Mixed with zinc sulfide , cadmium sulfide acts as a phosphor with long afterglow. (
  • Organic decomposition of sulfur compounds in sewers, barns, liquid manure pits, ships' holds, and sulfur springs also produces hydrogen sulfide. (
  • However, it's now emerging that the body actually produces hydrogen sulfide by specific enzymes and, as more researchers become interested in this gas, we are finding changes in hydrogen sulfide synthesis or changes in how hydrogen sulfide is used by the body. (
  • Bis(trimethylsilyl) Sulfide, also known as Hexamethyldisilathiane, is a chemical compound used as an aprotic source of sulfide ion in chemical synthesis. (
  • J. Gaur, S. Jain, S. Chand and N. Kaushik, "Tin Sulfide Nanoparticle Synthesis from Waste Waters," American Journal of Analytical Chemistry , Vol. 5 No. 2, 2014, pp. 50-54. (
  • Other UN number: 1849, sodium sulfide, hydrated with 30% or more water, hazard class 8, packaging group II. (
  • Cubic crystals of sodium sulfide (Na 2 S) are extremely hygroscopic in nature and discolor on exposure to air. (
  • What made you want to look up sodium sulfide ? (
  • The sulfide ion is a salt with a strong base, and any sodium sulfide is extremely corrosive and damaging to the skin. (
  • Sodium Sulfide is a moderately water and acid soluble Sodium source for uses compatible with sulfates. (
  • Sodium Sulfide is generally immediately available in most volumes. (
  • The method involves generation of hydrogen sulfide in an evolution-absorption apparatus by addition of sulfuric acid and subsequent trapping of the generated hydrogen sulfide in sodium hydroxide solution. (
  • Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. (
  • For example, the thioether dimethyl sulfide is CH3-S-CH3. (
  • Hydrogen sulfide (H₂S) is a colorless gas with a strong odor of rotten eggs. (
  • Hydrogen sulfide is a flammable, colorless gas that smells like rotten eggs. (
  • Hydrogen sulphide (H2S) is a colorless gas with the characteristic foul odor of rotten eggs. (
  • Selenium sulfide, an anti-infective agent, relieves itching and flaking of the scalp and removes the dry, scaly particles that are commonly referred to as dandruff or seborrhea. (
  • Selenium sulfide comes in a lotion and is usually applied as a shampoo. (
  • As a shampoo, selenium sulfide usually is used twice a week for the first 2 weeks and then once a week for 2, 3, or 4 weeks, depending on your response. (
  • For skin infections, selenium sulfide usually is applied once a day for 7 days. (
  • Use selenium sulfide exactly as directed. (
  • Avoid getting selenium sulfide in your eyes. (
  • Do not leave selenium sulfide on your hair, scalp, or skin for long periods (e.g., overnight) because it is irritating. (
  • selenium sulfide may damage it. (
  • If you are using selenium sulfide before or after bleaching, tinting, or permanent waving your hair, rinse your hair with cool water for at least 5 minutes after applying selenium sulfide to prevent discolored hair. (
  • tell your doctor and pharmacist if you are allergic to selenium sulfide or any other drugs. (
  • If you become pregnant while using selenium sulfide, call your doctor. (
  • Selenium sulfide may cause side effects. (
  • Ketoconazole and selenium sulfide are antifungal agents used to treat itching , flaking, scaling, and dry skin on the scalp due to dandruff . (
  • Ketoconazole and selenium sulfide are also used for treating seborrhea (a red, itchy rash ) and tinea versicolor , a fungal infection of the skin. (
  • Brand names for selenium sulfide include Head & Shoulders, Selsun Blue , SelRx, and Selsun Rx. (
  • Side effects of ketoconazole and selenium sulfide that are similar include hair loss (rare), and scalp tingling. (
  • What are ketoconazole and selenium sulfide? (
  • Selenium sulfide is a chemical agent commonly used for treating dandruff . (
  • What are the side effects of ketoconazole and selenium sulfide? (
  • What is the dosage of ketonazole vs. selenium sulfide? (
  • What drugs interact with ketonazole and selenium sulfide? (
  • There are no drug interactions listed for topical selenium sulfide. (
  • Are ketoconazole and selenium sulfide safe to use while pregnant or breastfeeding? (
  • What is the most important information I should know about selenium sulfide topical? (
  • Selenium sulfide is an antifungal medication. (
  • Selenium sulfide topical (for the skin) is used to treat dandruff, seborrhea, and tinea versicolor (a fungus that discolors the skin). (
  • Selenium sulfide topical may also be used for purposes not listed in this medication guide. (
  • What should I discuss with my healthcare provider before using selenium sulfide topical? (
  • You should not use this medicine if you are allergic to selenium sulfide. (
  • FDA pregnancy category C. It is not known whether selenium sulfide topical will harm an unborn baby. (
  • It is not known whether selenium sulfide topical passes into breast milk or if it could harm a nursing baby. (
  • Selenium sulfide topical should not be used on a child younger than 2 years old without a doctor's advice. (
  • How should I use selenium sulfide topical? (
  • Shake the selenium sulfide foam, lotion , or shampoo well just before each use. (
  • Selenium sulfide topical shampoo is generally not for daily use. (
  • Call your doctor if your symptoms do not improve, or if they get worse while using selenium sulfide topical. (
  • An overdose of selenium sulfide topical is not expected to be dangerous. (
  • What should I avoid while using selenium sulfide topical? (
  • Stop using selenium sulfide and call your doctor if you have unusual or severe blistering, itching, redness, peeling, dryness, or irritation of treated skin. (
  • What other drugs will affect selenium sulfide topical? (
  • Avoid using other topical medications at the same time you apply selenium sulfide topical, unless your doctor approves. (
  • Other skin medications may affect the absorption or effectiveness of selenium sulfide topical. (
  • Your pharmacist can provide more information about selenium sulfide topical. (
  • What do I need to tell my doctor BEFORE I take Selenium Sulfide Foam? (
  • If you have an allergy to selenium sulfide or any other part of selenium sulfide foam. (
  • What are some things I need to know or do while I take Selenium Sulfide Foam? (
  • Tell all of your health care providers that you take selenium sulfide foam. (
  • If selenium sulfide foam is swallowed, call a doctor or poison control center right away. (
  • How is this medicine (Selenium Sulfide Foam) best taken? (
  • Use selenium sulfide foam as ordered by your doctor. (
  • Very bad irritation where selenium sulfide foam is used. (
  • What are some other side effects of Selenium Sulfide Foam? (
  • How do I store and/or throw out Selenium Sulfide Foam? (
  • In doing so, selenium sulfide can effectively help to regulate the skin flora, and reduce flaking and skin discomfort caused by certain microorganisms. (
  • The biological activity of selenium sulfide. (
  • Diethyl sulfide has been found to be a constituent of the odor of durian fruit and as a constituent found in volatiles from potatoes. (
  • Hydrogen sulfide (H 2 S) is a colorless, flammable gas that has strong odor of rotten eggs. (
  • Hydrogen sulfide is a chemical compound with the formula , H 2 S. It is a colorless, toxic , and flammable gas , and is responsible for the foul odor of rotten eggs and flatulence. (
  • Sulfides are characterized by their strong odors, which are similar to thiol odor. (
  • This odor limits the applications of volatile sulfides. (
  • The odor threshold range for hydrogen sulfide is 0.0005 to 0.3 ppm (0.5 to 300 ppb). (
  • ABSTRACT This paper discusses the use of the Sycamore Continuous Emissions Monitor (CEM) for monitoring Hydrogen Sulfide Gas concentrations within odor control systems. (
  • This paper discusses hydrogen sulfide limits for various states that have recently updated their limits or whose limits demonstrate a distinction between health and odor-based limits. (
  • Odor discussions often focus on hydrogen sulfide because it has a low odor threshold and it is easily detected and recognized. (
  • Methane and hydrogen sulfide , both highly flammable and potentially explosive gases, are also constant hazards. (
  • ENMET's Wet Well Monitoring System is specifically designed for monitoring Methane (CH4), Oxygen (O2) and Hydrogen Sulfide (H2S) in a hazardous wastewater treatment plant environment. (
  • Hydrogen sulphide and methane emissions on the central Namibian shelf. (
  • Families can be exposed to more carbonyl sulfide than the general population if they live near natural or industrial sources of carbonyl sulfide, such as wetlands, volcanos, or coal combustion. (
  • David Schleheck: "To better understand the human microbiome and the effects of hydrogen sulfide, it is essential to know all the pathways that can lead to hydrogen sulfide production. (
  • Severe hypoxia leads to excess production of hydrogen sulfide in marine environments. (
  • In a doctoral research project conducted at the Department of Biology, the degradation of the dietary sugar sulfoquinovose by anaerobic bacteria to toxic hydrogen sulfide was described for the first time - increased production of hydrogen sulfide in the human intestinal system has been associated with inflammatory bowel disease and colon cancer. (
  • We want to investigate if these degradation pathways can also be found in the intestine and how much they contribute to the overall production of hydrogen sulfide, depending on the diet", says David Schleheck, whose research team has been supported by the Heisenberg Programme of the German Research Foundation (DFG). (
  • The production of hydrogen sulfide in general can contribute to inflammatory bowel disease and colon cancer. (
  • Exposure to low concentrations of hydrogen sulfide may cause irritation to the eyes, nose, or throat. (
  • Respiratory distress or arrest has been observed in people exposed to very high concentrations of hydrogen sulfide. (
  • Exposure to low concentrations of hydrogen sulfide may cause headaches, poor memory, tiredness, and balance problems. (
  • Brief exposures to high concentrations of hydrogen sulfide can cause loss of consciousness. (
  • Workers can't always rely on their nose to detect the gas: concentrations of hydrogen sulfide numb the sense of smell, so workers may not notice any odour. (
  • Carbonyl sulfide is the chemical compound with the linear formula OCS. (
  • Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. (
  • Polyphenylene sulfide (see below) has the empirical formula C6H4S. (
  • Diethyl sulfide is an organosulfur compound with the chemical formula (C 2H 5) 2S. (
  • This demonstration involves some fantastic chemistry and makes an excellent introduction to the use of quantitative calculations to find the formula of a reaction product, copper sulfide. (
  • What Is the Sulfide Ion Formula? (
  • Barium dierbium(III) tetra-sulfide, BaEr 2 S 4 , crystallizes with four formula units in the ortho-rhom-bic space group Pnma in the CaFe 2 O 4 structure type. (
  • Studies in humans suggest that the respiratory tract and nervous system are the most sensitive targets of hydrogen sulfide toxicity. (
  • Hydrogen sulfide forms a complex bond to the ferric moiety causing inhibition of mitochondrial cytochrome oxidase (iron-containing protein), thereby arresting aerobic metabolism in an effect similar to cyanide toxicity. (
  • [ 1 ] The petroleum industry is responsible for most cases of hydrogen sulfide toxicity in North America. (
  • Low-level exposures to hydrogen sulfide usually produce local eye and mucous membrane irritation, while high-level exposures rapidly produce fatal systemic toxicity. (
  • Based on the similarities in cyanide and hydrogen sulfide toxicity, induced methemoglobinemia may be used in hydrogen sulfide toxicity. (
  • Hydrogen Sulfide-Mechanisms of Toxicity and Development of an Antidote. (
  • Brouwer H, Murphy T (1995) Volatile sulfides and their toxicity in freshwater sediments. (
  • Hydrogen sulfide (H2S) gas is normally heavier than air, but when agitated, it can erupt from the confines of the pipe in levels of toxicity which paralyze the lungs. (
  • Diallyl sulfide and curcumin effectively reduced Thallium acetate induced liver toxicity. (
  • Exposure to hydrogen sulfide may cause irritation to the eyes and respiratory system. (
  • Workers may be harmed from exposure to hydrogen sulfide. (
  • The following resources provide information about occupational exposure to hydrogen sulfide. (
  • Contains a standard for mitigation of exposure to hydrogen sulfide to prevent adverse effects over a working lifetime. (
  • NIOSH Criteria Documents: Criteria for a Recommended Standard: Occupational Exposure to Hydrogen Sulfide -DHHS (NIOSH) Publication No. 77-158. (
  • Exposure to carbonyl sulfide occurs mainly by breathing low levels of this chemical in the air. (
  • Exposure can also occur if you consume products such as wheat, oats, barley, and canola shortly after they have been fumigated with carbonyl sulfide to increase insect resistance. (
  • The health effects of carbonyl sulfide appear to depend on how much you are exposed to and the length of that exposure. (
  • Exposure to carbonyl sulfide can damage areas of the brain that control movement and process sound information. (
  • No human or animal studies have examined whether exposure to carbonyl sulfide can cause cancer. (
  • Whether children are more sensitive to carbonyl sulfide exposure than adults is not known. (
  • It is not known if exposure to carbonyl sulfide will cause birth defects in humans. (
  • How can families reduce the risk of exposure to carbonyl sulfide? (
  • the general population will have some exposure to carbonyl sulfide. (
  • All can limit the risk of hydrogen sulfide exposure. (
  • Have you developed a written exposure control plan for hydrogen sulfide? (
  • Exposure to hydrogen sulfide and ammonia during the production and handling of mushroom compost can be deadly. (
  • In the United States from 1999 to 2007, 45 deaths from hydrogen sulfide exposure occurred, all of them unintentional. (
  • In 2017, 646 single exposures to hydrogen sulfide exposure were reported to Poison Control Centers in the United States. (
  • Occurrence of long-term neurologic sequelae from hydrogen sulfide exposure is unknown but appears to be linked to longer sublethal exposures. (
  • Initial treatment of hydrogen sulfide exposure requires immediate removal of the victim from the contaminated area into a ventilated/fresh-air environment. (
  • Chronic low-level hydrogen sulfide exposure and potential effects on human health: a review of the epidemiological evidence. (
  • While there are no regulatory exposure limits outside of the workplace for hydrogen sulfide (H 2 S), there are exposure guidelines to which our monitoring data will be compared. (
  • Whereas the sulphide generated in the sewage can cause a shock effect on EBPR, the continuously exposure to sulphide potentially generated in WWTP can cause the acclimatization and adaptation of the biomass. (
  • ANSI/ASSE Z390.1-2017, Accepted Practices for Hydrogen Sulfide Training Programs , is intended to help organizations with potential H 2 S exposure put training in place to protect workers. (
  • [3] Carbonyl sulfide is a potential alternative fumigant [14] to methyl bromide and phosphine . (
  • For example, methyl sulfide can mean CH3-SH. (
  • A methyl sulfide in which the sulfur atom is substituted by two methyl groups. (
  • For example, C 6 H 5 SCH 3 is methyl phenyl sulfide, but is more commonly called thioanisole , since its structure is related to that for anisole , C 6 H 5 OCH 3 . (
  • Microbially-induced corrosion (MIC) or biogenic sulfide corrosion are also caused by sulfate reducing bacteria producing sulfide that is emitted in the air and oxidized in sulfuric acid by sulfur oxidizing bacteria. (
  • The Bechtel hydrogen sulfide production unit produces a high-quality hydrogen sulfide product from hydrogen and liquid sulfur. (
  • Bechtel offers licensing and a process design license package for the hydrogen sulfide production unit. (
  • The hydrogen sulfide production unit consists of the sulfur storage and feed section, the reactor section, and the hydrogen sulfide cleanup section. (
  • Sulfide compounds can be prepared in several different ways: Direct combination of elements: Example: Fe(s) + S(s) → FeS(s) Reduction of a sulfate: Example: MgSO4(s) + 4C(s) → MgS(s) + 4CO(g) Precipitation of an insoluble sulfide: Example: M2+ + H2S(g) → MS(s) + 2H+(aq) Many metal sulfides are so insoluble in water that they are probably not very toxic. (
  • For instance, it is used to prepare organosulfur compounds (sulfur-containing organic compounds) and various metal sulfides and hydrosulfides. (
  • Like many other sulfur-containing compounds, volatile sulfides have foul odors. (
  • Thiophenes are a special class of sulfide-containing heterocyclic compounds . (
  • Petroleum contains many organosulfur compounds, including sulfides. (
  • The compounds and their derivatives are useful, for example, as hydrogen sulfide and mercaptan scavengers for use in both water and petroleum products. (
  • The catalytic method allows the determination of sulfide without any interference from other sulfur compounds present in blood. (
  • The chemical compound Al2S3 is named aluminum sulfide or aluminum sulphide. (
  • hydrogen sulphide Colourless, poisonous gas (H 2 S) with the smell of bad eggs. (
  • Grieshaber MK, Völkel S (1998) Animal adaptations for tolerance and exploitation of poisonous sulfide. (
  • Alberta's energy regulator has laid charges against three oil and gas companies after a release of poisonous hydrogen sulphide that affected human health. (
  • A catalytic method, based on the iodine-azide reaction, of the determination of sulfide in whole human blood is described. (
  • The hydrogen sulphide concentration is displayed on the LCD, where it remains until the next sample is taken. (
  • The facility recently saw a higher concentration at one of their fence line monitors that led to the identification of a potential source of hydrogen sulfide. (
  • The proposed standard will use direct-reading electrochemical detectors to identify whether the concentration of hydrogen sulfide gas exceeds the maximum allowable concentration (MAC) or other limits. (
  • These detectors are designed so that the current value change in the sensor is related to the concentration of hydrogen sulfide under conditions of sampling speed specified by the manufacturer," says ASTM International member Wei Xinming, of Qingdao Safety Engineering Institute, SINOPEC, in Qingdao, China. (
  • This produces toxic gas (hydrogen sulfide). (
  • Welding and soldering of surfaces treated with cadmium sulfide release highly toxic cadmium oxide which may cause acute lung injury (see ICSC 0117 - cadmium monoxide). (
  • Hydrogen sulfide is a dangerous toxic gas found in many industries. (
  • Both methods oxidize sulfides to less toxic sulfates . (
  • So, when I saw a bunch of hits starting yesterday with search terms like "hydrogen sulfide," I feared the worst: that another young person had committed suicide by mixing household chemicals to release the toxic and potentially fatal gas and search engines were driving traffic to one of my earlier hydrogen sulfide posts. (
  • Hydrogen sulfide - maligned for its toxic and explosive properties - may slow aging and block damaging chemical reactions inside cells, according to scientists in China, who reviewed studies on the malodorous gas and its effects on the cardiovascular and nervous systems. (
  • Precisely how hydrogen sulfide does its business is not clear, and that's also exciting," Whiteman said, adding that early research on hydrogen sulfide focused on its toxic effects. (
  • Another bacterium, Desulfovibrio, utilizes this intermediate for anaerobic respiration and produces toxic hydrogen sulfide (H2S). (
  • In future studies, the researchers will have to examine whether sulfoquinovose in the intestine is indeed metabolized to hydrogen sulfide, which is a toxic compound for humans. (
  • Ammonium sulfide is a very toxic chemical. (
  • Realgar is a monoclinic arsenic sulfide mineral with a brilliant red color and a chemical composition of As 4 S 4 . (
  • Orpiment is a monoclinic arsenic sulfide with a yellow-orange color and a chemical composition of As 2 S 3 . (
  • Re: Does cadmium sulphide possess property of superconductivity? (
  • [6] Some carbonyl sulfide that is transported into the stratospheric sulfate layer is oxidized to sulfuric acid. (
  • The sulfide is roasted in air, converting silver(I) sulfide to silver(I) sulfate. (
  • Some evidence suggests that hydrogen sulfide produced by sulfate-reducing bacteria in the colon may cause or contribute to ulcerative colitis. (
  • Other anthropogenic sources of hydrogen sulfide include coke ovens, paper mills (using the sulfate method), and tanneries . (
  • At concentrations of 135 micrograms per cubic meter (µg/m 3 ) (0.055 ppm), people may be able to smell carbonyl sulfide in air. (
  • People usually can smell hydrogen sulfide at low concentrations in air ranging from 0.0005 to 0.3 parts per million (ppm). (
  • If workers smell the distinctive rotten egg odour of hydrogen sulfide, they should leave the area immediately and contact a supervisor. (
  • P. K. Moore, M. Bhatia, and S. Moochhala, "Hydrogen sulfide: from the smell of the past to the mediator of the future? (
  • Grote J, Schott T, Bruckner CG, Glockner FO, Jost G, Teeling H, Labrenz M, Jurgens K (2012) Genome and physiology of a model Epsilonproteobacterium responsible for sulfide detoxification in marine oxygen depletion zones. (
  • Instead sulfide converts to hydrosulfide: S2− + H2O → SH− + OH− Upon treatment with an acid, sulfide salts convert to hydrogen sulfide: S2− + H+ → SH− SH− + H+ → H2S Oxidation of sulfide is a complicated process. (
  • Oxidation of sulfide can also form thiosulfate (S 2O2− 3) an intermediate species responsible for severe problems of pitting corrosion of steel and stainless steel while the medium is also acidified by the production of sulfuric acid when oxidation is more advanced. (
  • Compared with nonglacial weathering, glacial weathering is more likely to yield alkalinity/DIC ratios less than 1, suggesting that enhanced sulfide oxidation as a result of glaciation may act as a source of CO 2 to the atmosphere. (
  • Almgren T, Hagström I (1974) The oxidation rate of sulphide in sea water. (
  • A sulphide ( sulfide in US English ) is an anion of sulphur in its lowest oxidation number of -2. (
  • Such inorganic sulfides typically have very low solubility in water, and many are related to minerals with the same composition (see below). (
  • 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. (
  • (accessed on November 5, 2005). (
  • A number of metals are separated from their ores by treating the minerals with hydrogen sulfide. (
  • Volcanoes and hot springs emit some H 2 S, where it probably arises via the hydrolysis of sulfide minerals. (
  • Our analysis supports the theory that glacial weathering is characterized predominantly by weathering of trace sulfide and carbonate minerals. (
  • Future work on glaciation-weathering-carbon cycle feedbacks should consider weathering of trace sulfide minerals in addition to silicate minerals. (
  • The goal of both the EPA and DHEC Orders is for the site to continue to identify sources of hydrogen sulfide emissions and ways to reduce them. (
  • Investigation into Testing and Controlling Emissions of Hydrogen Sulfide from Gasoline Vehicles," SAE Technical Paper 2001-01-3530, 2001, . (
  • In organic chemistry, "sulfide" usually refers to the linkage C-S-C, although the term thioether is less ambiguous. (
  • An organic sulfide ( British English sulphide ) or thioether is a functional group in organosulfur chemistry with the connectivity C-S-C as shown on right. (
  • In analogy to their easy alkylation, sulfides bind to metals to form thioether complexes . (
  • Elucidation of the Sulfide Corrosion Mechanism in Piston Pin Bushings," SAE Technical Paper 2020-01-1079, 2020, . (
  • TORONTO , Aug. 20, 2020 /PRNewswire/ - Canada Nickel Company Inc. (TSXV: CNC) (' Canada Nickel ' or the ' Company ') today announced additional encouraging results from infill drilling on the Main Zone at its Crawford Nickel-Cobalt Sulphide project. (
  • The compound can also be prepared synthetically by passing hydrogen sulfide (H 2 S) gas through an aqueous solution of silver nitrate . (
  • Sulphide is also a term for thioethers , a common type of compound which are known for their bad odours (example: H 2 S = hydrogen sulphide). (
  • 7. A method for removing sulfide from a water comprising the step of contacting the gas with an amount of aromatic imine compound, thereby removing sulfide from the gas via reaction with the aromatic imine compound. (
  • Below these cascades lies Sulphide Lake, which empties over Sulphide Creek Falls, one of the highest waterfalls in North America with a nearly 2,200 ft (670 m) drop. (
  • The Department of Health and Human Services (DHHS), the International Agency for Research on Cancer (IARC) and the EPA have not classified carbonyl sulfide as to its carcinogenicity. (
  • Antioxidant mechanism of diallyl sulfide in inhibiting leucopenia in peripheral blood induced by benzene. (
  • Sulfur-reducing bacteria (such as Salmonella ) and some archaea obtain their energy by oxidizing organic matter or hydrogen with elemental sulfur , also producing H 2 S. Other anaerobic bacteria liberate hydrogen sulfide when they digest sulfur-containing amino acids , for instance during the decay of organic matter. (
  • Solutions of sulfide salts are corrosive. (
  • or an acidic or corrosive agent such as hydrogen sulfide, .Stress Corrosion Cracking (Corrosion Fatigue) 11. (
  • Hydrogen sulfide (H2S) and bisulfide (SH−) are the conjugate acids of sulfide. (
  • Hydrogen sulfide occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. (
  • Hydrogen sulfide is used in the petroleum, rubber, and mining industries, and in making sulfur. (
  • Hydrogen sulfide most often is encountered as a byproduct of the petroleum, viscose rayon, rubber, and mining industries. (
  • Small amounts of hydrogen sulfide occur in crude petroleum, but natural gas can contain up to 90 percent. (