Sulfur Compounds: Inorganic or organic compounds that contain sulfur as an integral part of the molecule.Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.Halitosis: An offensive, foul breath odor resulting from a variety of causes such as poor oral hygiene, dental or oral infections, or the ingestion of certain foods.Thiosulfates: Inorganic salts of thiosulfuric acid possessing the general formula R2S2O3.Sulfides: Chemical groups containing the covalent sulfur bonds -S-. The sulfur atom can be bound to inorganic or organic moieties.Sulfonium Compounds: Sulfur compounds in which the sulfur atom is attached to three organic radicals and an electronegative element or radical.Sulfur Isotopes: Stable sulfur atoms that have the same atomic number as the element sulfur, but differ in atomic weight. S-33, 34, and 36 are stable sulfur isotopes.Acidithiobacillus: A genus of gram-negative rod-shaped bacteria in the class GAMMAPROTEOBACTERIA. They are obligately acidophilic and aerobic, using reduced SULFUR COMPOUNDS to support AUTOTROPHIC GROWTH.Tetrathionic Acid: A sulfuric acid dimer, formed by disulfide linkage. This compound has been used to prolong coagulation time and as an antidote in cyanide poisoning.Garlic: One of the Liliaceae used as a spice (SPICES) and traditional remedy. It contains alliin lyase and alliin, which is converted by alliin lyase to allicin, the pungent ingredient responsible for the aroma of fresh cut garlic.Hydrogen Sulfide: 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)Thiotrichaceae: A family of colorless sulfur bacteria in the order Thiotrichales, class GAMMAPROTEOBACTERIA.3-Mercaptopropionic Acid: An inhibitor of glutamate decarboxylase. It decreases the GAMMA-AMINOBUTYRIC ACID concentration in the brain, thereby causing convulsions.Thiobacillus: A genus of gram-negative, rod-shaped bacteria that derives energy from the oxidation of one or more reduced sulfur compounds. Many former species have been reclassified to other classes of PROTEOBACTERIA.Sulfites: Inorganic salts of sulfurous acid.Sulfates: Inorganic salts of sulfuric acid.Volatilization: A phase transition from liquid state to gas state, which is affected by Raoult's law. It can be accomplished by fractional distillation.Epsilonproteobacteria: A group of proteobacteria consisting of chemoorganotrophs usually associated with the DIGESTIVE SYSTEM of humans and animals.Sulfur Dioxide: A highly toxic, colorless, nonflammable gas. It is used as a pharmaceutical aid and antioxidant. It is also an environmental air pollutant.Sulfhydryl Compounds: Compounds containing the -SH radical.Amino Acids, SulfurAllyl CompoundsSulfinic Acids: Any of the monobasic inorganic or organic acids of sulfur with the general formula RSO(OH). (From McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Sulfite Dehydrogenase: An enzyme that catalyzes oxidation of sulfite to sulfate along with the reduction of FERROCYTOCHROME C to FERRICYTOCHROME C.Petroleum: Naturally occurring complex liquid hydrocarbons which, after distillation, yield combustible fuels, petrochemicals, and lubricants.Oxidation-Reduction: A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).Sulfite Reductase (NADPH): A NADPH-dependent oxidase that reduces hydrogen sulfite to HYDROGEN SULFIDE. It is found in many microoganisms.Oxidoreductases Acting on Sulfur Group Donors: Oxidoreductases with specificity for oxidation or reduction of SULFUR COMPOUNDS.Onions: Herbaceous biennial plants and their edible bulbs, belonging to the Liliaceae.Cysteine: A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.Hydrogensulfite Reductase: An enzyme found primarily in SULFUR-REDUCING BACTERIA where it plays an important role in the anaerobic carbon oxidation pathway.Methionine: A sulfur-containing essential L-amino acid that is important in many body functions.Petroselinum: A plant genus of the family APIACEAE used for flavoring food.Chemoautotrophic Growth: Growth of organisms using AUTOTROPHIC PROCESSES for obtaining nutrients and chemotrophic processes for obtaining a primary energy supply. Chemotrophic processes are involved in deriving a primary energy supply from exogenous chemical sources. Chemotrophic autotrophs (chemoautotrophs) generally use inorganic chemicals as energy sources and as such are called chemolithoautotrophs. Most chemoautotrophs live in hostile environments, such as deep sea vents. They are mostly BACTERIA and ARCHAEA, and are the primary producers for those ecosystems.Chromatiaceae: A family of phototrophic purple sulfur bacteria that deposit globules of elemental sulfur inside their cells. They are found in diverse aquatic environments.Cheese: A nutritious food consisting primarily of the curd or the semisolid substance formed when milk coagulates.Seawater: The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.Sulfonic Acids: Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.SulfatasesMustard Gas: Severe irritant and vesicant of skin, eyes, and lungs. It may cause blindness and lethal lung edema and was formerly used as a war gas. The substance has been proposed as a cytostatic and for treatment of psoriasis. It has been listed as a known carcinogen in the Fourth Annual Report on Carcinogens (NTP-85-002, 1985) (Merck, 11th ed).Brevibacterium: A gram-positive organism found in dairy products, fresh and salt water, marine organisms, insects, and decaying organic matter.Gas Chromatography-Mass Spectrometry: A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.ThiophenesMolecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Rhodococcus: A bacterial genus of the order ACTINOMYCETALES.Ferrous Compounds: Inorganic or organic compounds that contain divalent iron.Biodegradation, Environmental: Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.Bacteria: One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Atmosphere: The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)Culture Media: Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.Anaerobiosis: The complete absence, or (loosely) the paucity, of gaseous or dissolved elemental oxygen in a given place or environment. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)Oxidoreductases: The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)RNA, Ribosomal, 16S: Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.Sulfur Oxides: Inorganic oxides of sulfur.Sequence Analysis, DNA: A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.Carbon-Sulfur Lyases: Enzymes that catalyze the cleavage of a carbon-sulfur bond by means other than hydrolysis or oxidation. EC 4.4.Disulfides: Chemical groups containing the covalent disulfide bonds -S-S-. The sulfur atoms can be bound to inorganic or organic moieties.Phylogeny: The relationships of groups of organisms as reflected by their genetic makeup.Water Microbiology: The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.Alphaproteobacteria: A class in the phylum PROTEOBACTERIA comprised mostly of two major phenotypes: purple non-sulfur bacteria and aerobic bacteriochlorophyll-containing bacteria.Geologic Sediments: A mass of organic or inorganic solid fragmented material, or the solid fragment itself, that comes from the weathering of rock and is carried by, suspended in, or dropped by air, water, or ice. It refers also to a mass that is accumulated by any other natural agent and that forms in layers on the earth's surface, such as sand, gravel, silt, mud, fill, or loess. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1689)DNA, Ribosomal: DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.Odors: The volatile portions of substances perceptible by the sense of smell. (Grant & Hackh's Chemical Dictionary, 5th ed)Phytotherapy: Use of plants or herbs to treat diseases or to alleviate pain.Bacterial Proteins: Proteins found in any species of bacterium.Chlorobi: A phylum of anoxygenic, phototrophic bacteria including the family Chlorobiaceae. They occur in aquatic sediments, sulfur springs, and hot springs and utilize reduced sulfur compounds instead of oxygen.Glutathione: A tripeptide with many roles in cells. It conjugates to drugs to make them more soluble for excretion, is a cofactor for some enzymes, is involved in protein disulfide bond rearrangement and reduces peroxides.
Crude oil is a mixture of many varieties of hydrocarbons and most usually have many sulfur-containing compounds. The oil ... Raw natural gas also may contain gaseous hydrogen sulfide and sulfur-containing mercaptans, which are removed in natural-gas ... In fact, the vast majority of the 64,000,000 metric tons of sulfur produced worldwide in 2005 was byproduct sulfur from ... Sulfur production report by the United States Geological Survey Discussion of recovered byproduct sulfur ISO 20815. ...
The roaster is the main source of gaseous pollutants, including alcohols, aldehydes, organic acids, and nitrogen and sulfur ... Particulate matter (PM), volatile organic compounds (VOC), organic acids, and combustion products are the principal emissions ... Gaseous emissions from roasting operations are typically ducted to a thermal oxidiser or thermal catalytic oxidiser following ... volatile organic compounds, and water (in the form of steam). There are several traditional variations in bean roasting in ...
"Molecular Spectra of Sulfur Molecules and Solid Sulfur Allotropes". Elemental Sulfur and Sulfur-Rich Compounds II. Topics in ... Gaseous disulfur has been detected emanating from the surface of Jupiter's moon Io, from the vicinity of Pele volcano. S2 ... Steudel, Ralf; Eckert, Bodo (2003). "Solid Sulfur Allotropes". Elemental Sulfur and Sulfur-Rich Compounds I. Topics in Current ... Singlet S2 is also formed when sulfur compounds such as H2S, PSF3 or COS are photolyzed. S2 can be generated by heating various ...
The major biological source of sulfur containing compounds is dimethyl sulfide. Nitric acid in rainwater is an important source ... Electrical power generation using coal is among the greatest contributors to gaseous pollutions that are responsible for acidic ... The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as electricity generation, factories ... and limited sulfur dioxide emissions from 110 of the largest power plants to a combined total of 8.7 million tons of sulfur ...
The refining process converts most of that sulfur into gaseous hydrogen sulfide. Raw natural gas also may contain gaseous ... is a mixture of many varieties of hydrocarbons and most usually has many sulfur-containing compounds. ... In fact, the vast majority of the 64,000,000 metric tons of sulfur produced worldwide in 2005 was byproduct sulfur from ... Sulfur production report by the United States Geological Survey Discussion of recovered byproduct sulfur "Legal and Policy ...
The remarkable NMD signals are tied to photochemical reactions at short wavelengths involving gaseous sulphur compounds ... The most notable examples of mass-independent fractionation in nature are found in the isotopes of oxygen and sulfur. The first ... Mass-independent fractionation of sulfur can be observed in ancient sediments, where it preserves a signal of the prevailing ... Halevy, I.; Johnston, D.; Schrag, D. (2010). "Explaining the structure of the Archean mass-independent sulfur isotope record". ...
... the first step in the process entails removal of sulfur compounds from the feedstock, because sulfur deactivates the catalysts ... Ammonia Production: SOC's ammonia-producing plant first converts natural gas (i.e. methane) into gaseous hydrogen. Starting ... This product is vital for the production of many chemical compounds and is also used as fuel for some machinery in addition to ...
Biological Interactions of Sulfur Compounds. CRC Press. p. 14. ISBN 0-7484-0245-4. "Sulfur Pentaflu". 1988 OSHA PEL Project. ... ISBN 981-238-153-8. Christophorou, L. G.; Sauers, I. (1991). Gaseous Dielectrics VI. Plenum Press. ISBN 0-306-43894-1. ... Disulfur decafluoride is produced primarily by the decomposition of sulfur hexafluoride: 2 SF6 → S2F10 + F2 This compound ... In the presence of excess chlorine gas, S 2F 10 reacts to form sulfur chloride pentafluoride (SF 5Cl): S 2F 10 + Cl 2 → 2 SF ...
... two gaseous compounds of sulfur comproportionate in the presence of a catalyst to give elemental sulfur: 2 H2S + SO2 → 3/8 S8 ...
Sulfur removal requires catalytic hydrogenation to convert sulfur compounds in the feedstocks to gaseous hydrogen sulfide: H2 ... The first step in the process is to remove sulfur compounds from the feedstock because sulfur deactivates the catalysts used in ... compounds can be tolerated in the synthesis (hydrogen and nitrogen mixture) gas. Relatively pure nitrogen can be obtained by ... RSH → RH + H2S(gas) The gaseous hydrogen sulfide is then adsorbed and removed by passing it through beds of zinc oxide where it ...
By contrast, the term "assimilatory" would be used in relation to the biosynthesis of organo-sulfur compounds. Barton, Larry L ... The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment. Metal Ions in Life Sciences. 14. Springer. pp. 237- ... Hydrogen Sulfide: A Toxic Gas Produced by Dissimilatory Sulfate and Sulfur Reduction and Consumed by Microbial Oxidation". In ... insights from dissimilatory sulfur metabolism". Biochim. Biophys. Acta. 1827 (2): 145-60. doi:10.1016/j.bbabio.2012.09.001. ...
... oxidizers can use as energy sources reduced sulfur compounds, including hydrogen sulfide, elemental sulfur, sulfite, ... solid and gaseous sulfur. On Earth, elemental sulfur can be found near hot springs and volcanic regions in many parts of the ... The element sulfur is used in matches, insecticides, and fungicides. Many sulfur compounds are odoriferous, and the smells of ... They use sulfur as the electron acceptor, and reduce various oxidized sulfur compounds back into sulfide, often into hydrogen ...
... (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. In the gaseous form, ... The electrical dipole moment of gaseous sulfur trioxide is zero. This is a consequence of the 120° angle between the S-O bonds ... Sulfur dioxide, which in turn is produced by the burning of sulfur or iron pyrite (a sulfide ore of iron). After being purified ... Sulfur trioxide is generated in situ from sulfuric acid or is used as a solution in the acid. Sulfur trioxide will cause ...
... sulfur oxides (SOx), volatile organic compounds (VOCs) [4-8], and absorbed toxic pollutants (polycyclic aromatic hydrocarbons ... The study found gaseous aliphatic aldehydes, which are carcinogenic and mutagenic, in incense smoke. A survey of risk factors ... The formula for the charcoal-based incense is superficially similar to black powder, though it lacks the sulfur. Natural plant- ... link) Lin, J M; L H Wang (September 1994). "Gaseous aliphatic aldehydes in Chinese incense smoke". Bulletin of Environmental ...
... the mechanism for this includes DNA damage and degradation of iron sulfur centers into iron ions and iron-nitrosyl compounds. ... Study Terminated - Company decision ) Liu, D.; Jin, H; Tang, C; Du, J (2010). "Sulfur dioxide: a novel gaseous signal in the ... The role of sulfur dioxide in mammalian biology is not yet well understood. Sulfur dioxide blocks nerve signals from the ... Gaseous signaling molecules are gaseous molecules that are either synthesised internally (endogenously) in the organism, tissue ...
... is a gaseous chemical compound of fluorine, sulfur, and nitrogen. It is unusual in having a ... The axial fluorine to sulfur distance is 1.556 Å. Nitrogen sulfur distance is about 1.696 Å. The fluorine-nitrogen bond is the ... Difluoroamino sulfur pentafluoride has been prepared by irradiating a mixture of dinitrogen tetrafluoride and sulfur ... Another way to make difluoroamino sulfur pentafluoride is by heating dinitrogen tetrafluoride and sulfur. This results in the ...
... carbonyl compounds, alkyl halides, and others. Sulfur tetrafluoride is a gaseous reagent that may be used to fluorinate a ... Fluorination by sulfur tetrafluoride produces organofluorine compounds from oxidized organic compounds, including alcohols, ... Gaseous reagents are introduced into the shaker by condensation and gaseous products are usually vented when the reaction is ... 6) Carbonyl compounds generally react with SF4 to yield geminal difluorides. Reaction times tend to be on the order of hours ...
... is an inorganic compound with formula SO. It is only found as a dilute gas phase. When concentrated or ... O bond in gaseous S2O (146 pm), SO2 (143.1 pm) and SO3 (142 pm). The molecule is excited with near infrared radiation to the ... In the laboratory sulfur monoxide can be produced by treating sulfur dioxide with sulfur vapour in a glow discharge. It has ... This compound is also highly flammable (similar flammability to methane) and when burned produces sulfur dioxide, a poisonous ...
... are a group of chemical compounds with the formula SO3+x where x lies between 0 and 1. They contain peroxo ... The favoured structure is: Colourless polymeric condensates are formed in the reaction of gaseous SO3 or SO2 with O2 in a ... O−O) groups and the oxidation state of sulfur is +6 as in SO3. Monomeric SO4 can be isolated at low temperatures (below 78 K) ... As such these compounds are non-stoichiometric. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed ...
Fresh domestic sewage entering a wastewater collection system contains proteins including organic sulfur compounds oxidizable ... sulfides are emitted in the gaseous phase. Temperature. The higher the temperature, the faster the kinetics of H2S production. ... In other word, bacteria will stop oxidizing the sulfur from H2S to produce acid, and the pH will stop decreasing. A mortar made ... AH3 is a stable compound down to a pH of 4 and it will form an acid-resistant barrier as long as the surface pH is not lowered ...
The particles are hygroscopic due to the presence of sulfur, and SO2 is converted to sulfate when high humidity and low ... Wet scrubbers pass the dirty air through a scrubbing solution (usually a mixture of water and other compounds) allowing the ... gaseous). The precursors for these aerosols-i.e. the gases from which they originate-may have an anthropogenic origin (from ... Secondary particles derive from the oxidation of primary gases such as sulfur and nitrogen oxides into sulfuric acid (liquid) ...
Sursulf has a sulfur compound in the salt bath to create surface sulfides which creates porosity in the workpiece surface. This ... The process works to achieve the same result as the salt bath and gaseous process, except the reactivity of the media is not ... The surface formed from the reaction has a compound layer and a diffusion layer. The compound layer consists of iron, nitrogen ... ICI called their process "the cassel" due to the plant where it was developed or "Sulfinuz" treatment because it had sulfur in ...
In industrial production dry ethylene and gaseous sulfur trioxide are reacted in a mixing ratio of 1:2.2 to 1.2,4 at 115 to 140 ... Carbyl sulfate is an organosulfur compound. The white solid is the product of the reaction of sulfur trioxide and ethylene. It ... Carbyl sulfate is produced in the highly exothermic (about 800 kcal/kg) reaction of ethylene and sulfur trioxide in the vapor ... Regnault and Heinrich Gustav Magnus reported first in the years 1838 to 1839 on the compound as reaction product of anhydrous ...
... catalyses the hydrogenation of double bonds and is useful because it tolerates sulfur compounds, which poison noble metal ... 2 Gaseous perrhenic acid is tetrahedral, as suggested by its formula HReO 4. Perrhenic acid or the related anhydrous oxide Re ... Perrhenic acid is the chemical compound with the formula Re 2O 7(OH 2) 2. It is obtained by evaporating aqueous solutions of Re ...
... the mechanism for this includes DNA damage and degradation of iron sulfur centers into iron ions and iron-nitrosyl compounds. ... NO is one of the few gaseous signaling molecules known and is additionally exceptional due to the fact that it is a radical gas ... So-called NONOate compounds are also used for nitric oxide generation. Nitric oxide reacts with all transition metals to give ... The most common compound is 4,5-diaminofluorescein (DAF-2). From a thermodynamic perspective, ·NO is unstable with respect to ...
Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium ... Compounds with the group 13 elementsEdit. The intermetallic compounds of the alkali metals with the heavier group 13 elements ( ... The liquid or gaseous product (the alkali metal) then undergoes fractional distillation for purification.[66] Most routes to ... CompoundsEdit. The alkali metals form complete series of compounds with all usually encountered anions, which well illustrate ...
SbBr3 H2CS Carbonyl sulfide and other organic sulfur compounds have been separated from gaseous carbon dioxide by treating with ... A compound containing a carbonyl group is often referred to as a carbonyl compound. Department of Chemistry, Harvard University ... It is a linear molecule consisting of a carbonyl group double bonded Carbonyl sulfide is the most abundant sulfur compound ... Carbonyl sulfide is used as an intermediate in organic compound synthesis. 85 Debye as compared to H 2 S with a dipole moment ...
... sulfur compounds, odorants, Odorants, Flame photometry, Fuel sulfur, Gas chromatography (GC)--gaseous fuels, Gaseous fuels, ... 10 Standard Test Method for Determination of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatography and Flame ... D5287 Practice for Automatic Sampling of Gaseous Fuels. D5504 Test Method for Determination of Sulfur Compounds in Natural Gas ... Standard Test Method for Determination of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatography and Flame ...
14 Standard Test Method for Online Measurement of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatograph and ... Electrochemical Detection , electrochemical detection, gas chromatography, odorants, on-line measurement, sulfur compounds, ... contain sulfur compounds that are naturally occurring or that are added as odorants for safety purposes. These sulfur compounds ... Gaseous fuels are analyzed for sulfur compounds and odorant levels to assist in pipeline integrity surveillance and to ensure ...
... Results Gaseous sulfur-containing compounds such as methanethiol and hydrogen sulfide were produced when glucose was allowed to ... Generation of gaseous sulfur-containing compounds in tumour tissue and suppression of gas diffusion as an antitumour treatment ... Conclusions Gaseous sulfur-containing compounds are the main products in tumours and preventing the diffusion of these ...
... manganous salt in an aqueous solution having a pH in the range from about 8.0 to about 13.5 with an oxygen-containing gaseous ... A process for removing Total Reduced Sulfur compounds from a gaseous stream such as those containing natural gas, industrial ... "Total Reduced Sulfur compounds".. The term "Total Reduced Sulfur compounds" herein refers in general to sulfur compounds with ... The term "Total Reduced Sulfur compounds" herein refers in general to sulfur compounds with the redox state of the sulfur atom ...
... sulfur by first treating the gaseous steam with hydrogenation and hydrolysis to convert substantially all of the sulfur ... Then reducing the water content of the gaseous stream to optimize chemical equilibrium. Thereafter, the gaseous steam is ... The product gas leaving the oxidation reactor is cooled to separate elemental sulfur by condensation. The acid catalyst is a ... A process for reducing sulfur content in a gaseous stream with the production of elemental ...
ASTM® D5504 (Sulfur Compounds in Natural Gas and Fuels by GC) EPA 18 (Gaseous Organic Compounds; VOCs by GC) ... Tedlar is recommended in several US EPA methods for sampling VOCs and sulfur compounds. Our Tedlar is made from a high-quality ... suitable for EPA TO-12 (Non-Methane Organic Compounds (NMOC)) suitable for EPA TO-14A (Volatile Organic Compounds (VOCs) by GC/ ... suitable for ASTM® D5504 (Sulfur Compounds in Natural Gas and Fuels by GC) ...
Difluoroamino sulfur pentafluoride is a gaseous chemical compound of fluorine, sulfur, and nitrogen. It is unusual in having a ... The axial fluorine to sulfur distance is 1.556 Å. Nitrogen sulfur distance is about 1.696 Å. The fluorine-nitrogen bond is the ... Difluoroamino sulfur pentafluoride has been prepared by irradiating a mixture of dinitrogen tetrafluoride and sulfur ... Another way to make difluoroamino sulfur pentafluoride is by heating dinitrogen tetrafluoride and sulfur. This results in the ...
Gaseous Ammonia; Sulfur compounds; Nitrogen oxides; Carbon monoxide; Carbon dioxide. Quantity. 1L. ...
Gaseous sulfur compounds (expressed as sulfur dioxide). $539.79 Particulate matter. $539.79 Toxic Air Contaminants Dollars Per ...
... gaseous sulfur compounds (expressed as sulfur dioxide), total organic gases, oxides of nitrogen (expressed as nitrogen dioxide ... Gaseous sulfur compounds (expressed as sulfur dioxide). $3.00 Particulate matter. $52.00 3.. The Air Pollution Control Officer ...
Asphalt is a complex mixture consisting of paraffinic and aromatic hydrocarbons and heterocyclic compounds containing sulfur, ... Fumes are small particles created by condensation from the gaseous state after volatilization. Fumes are typically in the size ... Sulfur hexafluoride (SF6) was released as a tracer gas to quantify the capture efficiency and exhaust volume of each ...
Moreover, the system removes more odorant chemicals, including other sulfur and nitrogen compounds. "We did extensive research ... These bacteria absorb and degrade gaseous pollutants. After the bacteria begin to multiply, their efficiency at converting ... When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move ...
Gaseous pollutants include sulfur compounds such as SO2 and sulfur trioxide; carbon monoxide; nitrogen compounds such as nitric ... Much of the secondary pollutants PM2.5 consists of created by the condensation of gaseous pollutants-for example, sulfur ... Volatile organic compounds are released from burning fuel (gasoline, oil, coal, wood, charcoal, natural gas, and so on); ... Motor vehicles emit PM, nitric oxide and NO2 (together referred to as NOx), carbon monoxide, organic compounds, and lead. Lead ...
Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. In the gaseous form, ... The electrical dipole moment of gaseous sulfur trioxide is zero. This is a consequence of the 120° angle between the S-O bonds ... Sulfur dioxide, which in turn is produced by the burning of sulfur or iron pyrite (a sulfide ore of iron). After being purified ... Sulfur trioxide is generated in situ from sulfuric acid or is used as a solution in the acid. Sulfur trioxide will cause ...
This solution is dedicated to the measurement of impurities (e.g hydrocarbons, sulfur compounds...) in gaseous carbon dioxide. ...
The major climate influence from volcanic eruptions is caused by gaseous sulfur compounds, chiefly sulfur dioxide, which reacts ... Volcanoes usually produce sulfur and you say sulfur compounds can increase cloud formation. Dont forget that lightning or ... Do gaseous sulfur compounds have any electric properties?. It seems to have magnetic properties; http://iopscience.iop.org/1009 ... Sulfur (and nitrogen) compounds are critical components in the Earths atmosphere for a different reason than electric plasma ...
Oxygenated volatile organic compounds (OVOCs) Sulfur dioxide Ozone Mediterranean Sea Principal component analysis (PCA) Marine ... and other gaseous pollutants. ... These two compounds were also present at levels above the ... An overview on the marine boundary layer (MBL) concentration levels of carbonyl compounds, ozone (O3), and sulfur dioxide (SO2 ... Feng Y, Wen S, Chen Y, Wang X, Lü H, Bi X, Sheng G, Fu J (2005) Ambient levels of carbonyl compounds and their sources in ...
To remove the undesired sulfur-containing substances in the form of H 2 S and mercaptan from crude gas, it is proposed in ... which is contaminated with sulfur in the form of H 2 S and mercaptans as well as CO 2 . ... C01B17/02-Preparation of sulfur; Purification * C01B17/04-Preparation of sulfur; Purification from gaseous sulfur compounds ... including gaseous sulfides * C01B17/0404-Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous ...
Sulfur removal requires catalytic hydrogenation to convert sulfur compounds in the feedstocks to gaseous hydrogen sulfide: ... The first step in the process is to remove sulfur compounds from the feedstock because sulfur deactivates the catalysts used in ... Formation of other compounds. In reactions with organic compounds, ammonia can act as a nucleophile in substitution reactions. ... It also forms explosive compounds with compounds of gold, silver, mercury, germanium or tellurium, and with stibine. Violent ...
Meteorological and Chemical Behavior of Gaseous Sulfur Compounds in and around an Urban Valley ...
The pollutants may be composed of gaseous and solid material, including particulate matter, nitrogen oxides ("NOx"), and sulfur ... and sulfur compounds exhausted to the environment has been to remove these pollutants from the exhaust flow of an engine with ... sulfur compounds, particulate matter, and/or other pollutants known in the art. Such catalyst materials may include, for ... It is understood that the connection between the flow receiving device 24 and the boss 21 may have gaseous and mechanical ...
Results for sulfur dioxide (so2) from leading brands for air and climate. Compare and contact a supplier near you on (air and ... Removal of halogenated and sulfur bearing gaseous compounds from high temperature thermal oxidizers and drilling platforms ... Sulfur Dioxide (SO2) monitoring. Sulfur Dioxide (SO2) is the product of the combustion of sulfur compounds and causes ... EDXRF spectrometers for ultra low sulfur. Compliance with the ASTM method at low concentrations sulfur. Sulfur is a major ...
Sulfur cycling in the biosphere is tightly interwoven with the cycling of carbon and nitrogen, through various biological and ... In: The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment. Springer Netherlands. 279-313Google Scholar ... Transformation of sulfur compounds by an abundant lineage of marine bacteria in the α-Subclass of the class proteobacteria. ... Sulfur cycling Sulfur oxidation Heterotrophic bacteria Metabolic pathway This is a preview of subscription content, log in to ...
  • Many sources of natural gas and petroleum gases contain varying amounts and types of sulfur compounds, which are odorous, corrosive to equipment, and can inhibit or destroy catalysts used in gas processing. (astm.org)
  • These sulfur compounds are odorous, corrosive to equipment, and can inhibit or destroy catalysts employed in gas processing and other end uses. (astm.org)
  • Sulfur trioxide will cause serious burns on both inhalation and ingestion because it is highly corrosive and hygroscopic in nature. (wikipedia.org)
  • For example, while the main constituent, methane, is very clean, some of the compositions of digester gas or biogas contain significant hydrogen sulphide levels even after sulphur scrubbing, from which highly corrosive compounds are formed during the combustion process. (sae.org)
  • Catalytic poisoning by adsorbed sulfur compounds and corrosive decay produced by surface sulfidation have been reported as the two main mechanisms that reduce membrane performance [ 11 ]. (hindawi.com)
  • The fluorine atoms attached to the sulfur are attached at close to 90° from each other, and the four around the equator are also at 90° from the nitrogen sulfur bond. (wikipedia.org)
  • The distance between sulfur and the four equatorial fluorine atoms is 1.545 Å. (wikipedia.org)
  • Under normal conditions , sulfur atoms form cyclic octatomic molecules with a chemical formula S 8 . (wikipedia.org)
  • It turned out that there were actually two things going on in their original laser production process: ablation, which was responsible for creating the surface cones, and rapid melting combined with resolidification, which trapped doped sulfur atoms in a nanocrystalline structure of the silicon. (technologyreview.com)
  • Now the laser breaks down the material and lets it recrystallize with 1 to 2 percent sulfur atoms trapped inside-highly doped for a semiconductor-but the surface remains smooth and flat. (technologyreview.com)
  • The scarcity of silicon-sulfur compounds in the reaction products is undoubtedly due to the instability of these compounds and to the affinity of SiF2 for atoms other than sulfur. (rice.edu)
  • Identify the primary species (atoms, molecules, or ions) present in an aqueous solution of each of the following compounds. (bartleby.com)
  • The column, with low bleed and exceptional inertness, provided good resolution and peak shape to these reactive sulfur com - pounds. (boekhandeldeoorsprong.nl)
  • This paper describes the results of the experiment in which crystallization of protein of reactive center purified from the photosynthetic film of thermophilic purple sulfur photosynthetic bacterium Chromatium tepidum whose hyrogen donor in photosynthesis is H2S instead of H2O was attempted. (osti.gov)
  • Tainetsusei kogosei saikin ni yuraisuru kogosei hanno chushin no kozo kaimei to kino kaihatsu} author = {Nozawa, T, Morishita, Y, Kobayashi, M, and Kanno, S} abstractNote = {This paper describes the results of the experiment in which crystallization of protein of reactive center purified from the photosynthetic film of thermophilic purple sulfur photosynthetic bacterium Chromatium tepidum whose hyrogen donor in photosynthesis is H2S instead of H2O was attempted. (osti.gov)
  • These bacteria absorb and degrade gaseous pollutants. (innovations-report.com)
  • Sulfur-oxidizing bacteria have evolved diverse phylogenetic and metabolic characteristics to fill an array of ecological niches in various marine habitats. (springer.com)
  • Delineating the metabolic enzymes and pathways of sulfur-oxidizing bacteria not only provides an insight into the microbial sulfur metabolism, but also helps us understand the effects of changing environmental conditions on marine sulfur cycling and reinforces the close connection between sulfur and carbon cycling in the ocean. (springer.com)
  • These are the oldest reported fossil sulfur bacteria to date," says Andrew Czaja, UC assistant professor of geology. (wattsupwiththat.com)
  • The 2.52 billion-year-old sulfur-oxidizing bacteria are described by Czaja as exceptionally large, spherical-shaped, smooth-walled microscopic structures much larger than most modern bacteria, but similar to some modern single-celled organisms that live in deepwater sulfur-rich ocean settings today, where even now there are almost no traces of oxygen. (wattsupwiththat.com)
  • These early bacteria likely consumed the molecules dissolved from sulfur-rich minerals that came from land rocks that had eroded and washed out to sea, or from the volcanic remains on the ocean's floor. (wattsupwiththat.com)
  • There is an ongoing debate about when sulfur-oxidizing bacteria arose and how that fits into the earth's evolution of life, Czaja adds. (wattsupwiththat.com)
  • But these fossils tell us that sulfur-oxidizing bacteria were there 2.52 billion years ago, and they were doing something remarkable. (wattsupwiththat.com)
  • Alternate embodiments can include a third zone containing a second substantially uniform electric field as well as coating the porous surface with a catalyst to convert undesirable compounds. (google.com)
  • Plants use substantial quantities of sulfur for the formation of proteins, as a catalyst in chlorophyll production and in other processes, but are unable to absorb it in elemental form. (gardenguides.com)
  • 1.3 This test method does not intend to identify all individual sulfur species. (astm.org)
  • 5.3 This method offers an on-line technique to continuously identify and quantify individual target sulfur species in gaseous fuel with automatic calibration and validation. (astm.org)
  • In the gaseous form, this species is a significant pollutant, being the primary agent in acid rain. (wikipedia.org)
  • A process testing a flue gas, off gas, combustible gas, or other gaseous composition for a particular claimed or solely disclosed species should be classified with that species. (uspto.gov)
  • The primary species present in an aqueous solution of given compound has to be identified and the species either Bronsted acid or Bronsted base and strong or weak should be identified. (bartleby.com)
  • Various processes have been proposed for reducing the content of sulfur compounds in gaseous streams such as those containing natural gas, industrial gases, and digester gas. (google.com)
  • Sulfur cycling in the biosphere is tightly interwoven with the cycling of carbon and nitrogen, through various biological and geochemical processes. (springer.com)
  • Particularly those absorption processes have gained commercial importance, in which the gas is scrubbed in one or more stages with liquid absorbents, which depending upon their dissolving power absorb the impurities from the gas simultaneously or in succession and are thereafter regenerated to release the gaseous constituents they have absorbed and are recycled to the scrubbing treatment. (google.co.uk)
  • As part of FSEC's work on photocatlytic processes, researchers developed a UV-photochemical method for decomposing H2S into its constituent elements, hydrogen and sulfur. (ucf.edu)
  • A. Processes which involve a chemical reaction for determining qualitatively or quantitatively the presence of a chemical element, compound or complex in a composition or a chemical compound, or an element or radical in a compound. (uspto.gov)
  • The CO 2 , CH 4 , N 2 O and H 2 O are both produced and utilized in many biological processes, although the major source of gaseous water is evaporation from the oceans. (nap.edu)
  • There is speculation that this reaction produces gaseous sulfur-containing compounds in tumour tissue. (bmj.com)
  • There are prepared reaction products of a. 4,4-bis-(hydroxymethyl)-cyclohexene compounds of the formula ##EQU1## where R1, R2 and R4 are the same or different and are hydrogen, methyl or phenyl and there is also present either (1) X as the bridging member methylene or ethylene or (2) X is absent and. (google.ca)
  • The reaction between SiF2 and sulfur produced both linear and cyclic fluorosilthianes. (rice.edu)
  • Mass spectrometry , also called mass spectroscopy , analytic technique by which chemical substances are identified by the sorting of gaseous ions in electric and magnetic fields according to their mass-to-charge ratios . (britannica.com)
  • Now that advances in system and component technologies enable advanced combustion strategies like Miller or Atkinson cycles and higher cylinder pressures, [gaseous-fueled engines] can reach a thermal efficiency closer to a diesel," says Gian Maria Olivetti, Chief Technology Officer, Federal-Mogul Powertrain. (sae.org)
  • Natural gas or alternative gaseous fuels include a wide range of variations from different geological regions and derived from alternative sources, leading to considerable differences in composition that can have a major influence on combustion and consequently on spark plug design. (sae.org)
  • In some embodiments a dielectric barrier discharge surface can be provided to convert harmful compounds to more desirable substances. (google.com)
  • Studies were conducted on fuels containing three different levels of sulfur, covering the range of 6 to 340 parts per million, for a light-duty application. (sae.org)
  • Boilers combusting unprocessed natural gas may have higher SO2 emissions due to higher levels of sulfur in the natural gas. (boekhandeldeoorsprong.nl)
  • It is well known that the catalytic activity of platinum and of most transition metals is drastically reduced when the reagents contain even small quantities of sulfur. (hindawi.com)