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Topic: Sulfur hexafluoride

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sulfur dioxide

iron sulfur cluster

green sulfur bacteria

purple non sulfur bacteria

Sulfur hexafluoride

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Sulfuric acid, peroxymono

green sulfur

green non sulfur bacteria

Sulfur nitride

purple sulfur bacteria

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	Sulfur - Wikipedia, the free encyclopedia
		Sulfur is also used in batteries, detergents, the vulcanization of rubber, fungicides, and in the manufacture of phosphate fertilizers.
		This sulfuric acid is a component of acid rain, which lowers the pH of soil and freshwater bodies, resulting in substantial damage to the natural environment and chemical weathering of statues and architecture.
		Sulfur mined in Alberta, prepared for shipment at Vancouver, B. Common naturally-occurring sulfur compounds include the metal sulfides, such as pyrite (iron sulfide), cinnabar (mercury sulfide), galena (lead sulfide), sphalerite (zinc sulfide) and stibnite (antimony sulfide); and the metal sulfates, such as gypsum (calcium sulfate), alunite (potassium aluminium sulfate), and barite (barium sulfate).
	en.wikipedia.org /wiki/Sulfur (2153 words)

	Sulfur hexafluoride - Wikipedia, the free encyclopedia
		Sulfur hexafluoride (SF) is a gas whose molecules consist of one sulfur atom and six fluorine atoms.
		However, because its mixing ratio in the atmosphere is lower than that of CO (about 0.005 ppm versus 365 ppm), its contribution to global warming is accordingly low.
		Sulfur hexafluoride can affect the sound of a person's voice if it is inhaled in small quantities.
	en.wikipedia.org /wiki/Sulfur_hexafluoride (598 words)

	Sulfur Hexafluoride Gas Description (Site not responding. Last check: 2007-10-22)
		Sulfur Hexafluoride is a colorless, odorless, nontoxic, nonflammable gas that is used as an insulating gas in electrical equipment.
		Sulfur Hexafluoride is used for leak detection and as a gaseous dielectric for transformers, condensers and circuit breakers.
		Sulfur Hexafluoride is highly effective as an etchant in the semiconductor industry.
	www.spectra-gases.com /PureGases/sf6/SulfurHex.htm (152 words)

	Online Publication - SIR 2004-5190 - USGS Water Resources of Maryland, Delaware, and D.C. Area (WRD MD-DE-DC)
		Bromide and sulfur hexafluoride tracers (0.139 liter of solution containing 100,000 milligrams per liter of bromide ion and 23.3 milligrams per liter of sulfur hexafluoride) were co-injected and monitored to generate a dataset that could be used to evaluate solute transport in three dimensions.
		During the tracer test, the fluorescein dye, bromide, and sulfur hexafluoride were transported predominantly in the upward direction, although all three tracers also moved outward in all directions from the injection point, and it is likely that some tracer mass moved beyond the lateral edges of the array.
		The mass of bromide and sulfur hexafluoride tracers within the array was estimated from the mean concentrations during each of four major sampling episodes that took place between 103 and 375 days after tracer injection.
	md.water.usgs.gov /publications/sir-2004-5190 (1062 words)

	Mitigating Greenhouse Gas Emissions: Voluntary Reporting (Site not responding. Last check: 2007-10-22)
		U.S. emissions of HFCs grew by nearly 60 percent between 1990 and 1995, emissions of perfluorocarbons by 24 percent, and emissions of sulfur hexafluoride by 29 percent.
		Sulfur hexafluoride is used as an insulator for circuit breakers, switch gear, and other electric equipment and as a cover gas in magnesium smelting.
		Annual U.S. emissions of sulfur hexafluoride are estimated to have remained steady in the neighborhood of 1,000 to 1,500 metric tons since 1990, with about three-quarters attributable to electrical equipment and one-quarter to magnesium smelting.
	www.eia.doe.gov /oiaf/1605/vr96rpt/chap7.html (1819 words)

	Research Abstract: 1991-10 Analysis Of The 1987 Southern California Air Quality Study (SCAQS) Sulfur Hexafluoride ... (Site not responding. Last check: 2007-10-22)
		The sulfur hexafluoride tracer releases done near downtown Los Angeles reveal aspects of the complexity of the atmospheric emission transport from this location.
		The residence time for the sulfur hexafluoride tracer released from Vernon CA is 10 hours in the summer, and exceeds 24 hours for the fall.
		The primary exit route of the sulfur hexafluoride tracer during the summer releases was the San Fernando Valley to the northwest of downtown.
	www.arb.ca.gov /research/abstracts/a932-051.htm (232 words)

	Fluorides and Fluoridation - Sulfur Hexafluoride (Site not responding. Last check: 2007-10-22)
		The electric power industry uses sulfur hexafluoride (SF 6) to insulate high voltage lines, circuit breakers, and other equipment used in electricity transmission and distribution.
		Sulfur hexafluoride is extremely stable and long-lasting, with an estimated atmospheric lifetime of 3,200 years.
		The Intergovernmental Panel on Climate Change, an international group of scientists set up by the United Nations, has calculated the global warming potential of SF 6 to be 23,900 over 100 years.
	www.rvi.net /~fluoride/000063.htm (177 words)

	Physics Demonstrations - Sound
		An especially instructive demonstration is to breathe a mixture of helium and sulfur hexafluoride in a proportion such that its density is close to the density of air.
		Sulfur hexafluoride has the additional property that, since it is a high density gas, it tends to remain in the lungs for a long time, and thus the effect on the voice persists much longer.
		Helium and sulfur hexafluoride are two of a very small number of gases with which this demonstration can be safely done.
	sprott.physics.wisc.edu /demobook/chapter3.htm (7341 words)

	Paradoxical helium and sulfur hexafluoride single-breath washouts in short-term vs. sustained microgravity -- Lauzon et ...
		Paradoxical helium and sulfur hexafluoride single-breath washouts in short-term vs. sustained microgravity -- Lauzon et al.
		Paradoxical helium and sulfur hexafluoride single-breath washouts in short-term vs. sustained microgravity
		Multiple-breath washin of helium and sulfur hexafluoride in sustained microgravity
	jap.physiology.org /cgi/content/abstract/82/3/859 (555 words)

	Sulfur Hexafluoride Scott Specialty Gases for semiconductor and electronic applications
		Sulfur Hexafluoride (SF) is a colorless, odorless, nonflammable, nonreactive, relatively nontoxic gas which acts as a simple asphyxiant by displacing air.
		Sulfur Hexafluoride is used for plasma etching prior to chemical vapor deposition (CVD).
		Sulfur Hexafluoride gas, which is itself inert, disassociates in the presence of an RF field to form reactive fluoride ions.
	www.scottsemicon.com /pures/sulfur.html (121 words)

	Sulfur Hexafluoride Gas Tracer Studies in Streams (Site not responding. Last check: 2007-10-22)
		The air-water mass transfer coefficients, dispersion coefficients, and mean residence times in two experimental streams and one natural stream are measured using a variation of the standard volatile tracer-dye technique.
		Sulfur hexafluoride (SF) is used as the volatile tracer and rhodamine WT is used as the conservative tracer.
		The low limit of quantitative of SF makes it possible to inject SF -rich water into many streams and avoid complications with dosing a stream with a gaseous tracer.
	www.pubs.asce.org /WWWdisplay.cgi?9803600 (163 words)

	VA Aquifer Susceptibility-Chlorofluorocarbons
		Sulfur hexafluoride (SF is a nontoxic and extremely stable gas that is found in trace amounts in the atmosphere.
		Busenberg, Eurybiades, and Plummer, L.N., 1997, Use of sulfur hexafluoride as a dating tool and as a tracer of igneous and volcanic fluids in ground water.
		Busenberg Eurybiades, and Plummer, L.N., 2000, Dating young ground water with sulfur hexafluoride: Natural and anthropogenic sources of sulfur hexafluoride: Water Resources Research, v.
	va.water.usgs.gov /va123/3age-C.html (276 words)

	Articles - Helium (Site not responding. Last check: 2007-10-22)
		Helium can form unstable compounds with tungsten, iodine, fluorine, sulfur and phosphorus when it is subjected to an electric glow discharge, through electron bombardment or is otherwise a plasma.
		This is due to the rapid and large increases in pressure and, if allowed, volume that occur when helium gas at that temperature is warmed to room temperature.
		Sulfur hexafluoride has the opposite effect on the speed of sound as helium.
	www.1-generator.com /articles/Helium (4920 words)

	JAWMA Paper: Sulfur Hexafluoride (SF 6 ): Global Environmental Effects and Toxic Byproduct Formation (Site not responding. Last check: 2007-10-22)
		This work provides information concerning possible glo-bal environmental implications and personnel safety aspects that should be considered during the commercial uses of sulfur hexafluoride (SF 6).
		New system design rules (i.e., hermetically sealed gas compart-ments, gas recycling or disposal in the field area) and dif-ferent handling policies-both during maintenance and final disposal-now should be considered globally to pro-vide for environmental and personnel safety.
		In this work the environmental impact of sulfur hexafluo-ride, either in a global scale or in the station working envi-ronment is emphasized.
	www.awma.org /Journal/ShowAbstract.asp?Year=&PaperID=24 (257 words)

	Helium and Sulfur Hexafluoride (Site not responding. Last check: 2007-10-22)
		Sulfur hexafluoride on the other hand, is a really heavy gas (five times heavier than air), resulting in a lower frequency.
		Your lungs can supply nitrogen, and cylinders of sulfur hex and helium connected by rubber tubing for the others.
		Sulfur hex might contain toxic impurities, but you can show its weight by creating the proverbial 'lead balloon'.
	fas.harvard.edu /~scidemos/OscillationsWaves/HeandSFl6/HeandSFl6.html (167 words)

	Sulfur Hexafluoride : SF6 : Chemically Pure - Electronic and Supercritical Fluid - Properties, Purity and Packaging - ...
		Sulfur Hexafluoride : SF6 : Chemically Pure - Electronic and Supercritical Fluid - Properties, Purity and Packaging - Sulfur hexafluoride is used as a gaseous insulator in power breakers.
		Used as a trace gas and an oxygen asyphxiant in aluminum foundry application in reduction of porosity, replacing corrosive and toxic chlorine processes.
		Sulfur also forms oxyhalides, in which the sulfur atom is bonded to both oxygen and halogen atoms.
	www.c-f-c.com /gaslink/pure/sulfurhex_sf6.htm (222 words)

	SULFUR HEXAFLUORIDE - SF6
		Sulfur Hexafluoride(SF6) is a kind of colorless, odorless, non-toxic, and non-inflammable gas matter, with strong chemical stability, It has excellent, arc quenching properties and high electric strength, It is a sort of Super-high pressure insulation material.
		Sulfur Hexafluoride is widely used in electric equipment such as circuit breaker, airsealed combination capacitor, transformer.
		GIT cable, mutual inductor and lightning arrested etc. SF6 is also widely used in particle accelerator, tracer analyses, X-ray machine, nonferrous smelt and so on.
	www.gtamart.com /mart/products/chemical/gsf6.html (221 words)

	Sulfur Hexafluoride (Site not responding. Last check: 2007-10-22)
		In humans, exposure to 80% sulfur hexafluoride and 30% oxygen for 3 minutes produces peripheral tingling and a mild excitement stage with some altered hearing in most subjects.
		Repeated or prolonged exposure to fluorides may cause fluorosis with weight loss, brittle bones, anemia, weakness, general ill health, stiff joints, and discoloration of teeth when exposure occurs during tooth formation.
		Sulfur: (reacts with vapor at 400ºC) Chemical Index
	www.camd.lsu.edu /msds/s/sulfur_hexafluoride.htm (562 words)

	Concorde Gas
		It is a superior quality Sulfur Hexafluoride which features the lowest moisture content and least amount of impurities of any SF6 gas in its class.
		Super SF6 (Sulfur Hexafluoride) is an inert, non-toxic gas with excellent physical properties, including dielectric, cooling, insulating and arc quenching capabilities.
		Super SF6 gas, a superior quality Sulfur Hexafluoride which features the lowest moisture content and least amount of impurities of any SF6 gas in its class.
	www.concordegas.com /sf6.html (147 words)

	Trends Online - Other Atmospheric Trace Gases (Site not responding. Last check: 2007-10-22)
		Trifluoromethyl Sulfur Pentafluoride (SF) and Sulfur Hexafluoride (SF) from Dome Concordia - W.
		(2000) identified trifluoromethyl sulfur pentafluoride (SF) as a previously unreported gas that is long-lived (an atmospheric residence of several hundred to several thousand years) and with significant GWP (perhaps 18,000 times that of CO on a unit-mass basis).
		The database included here quantifies atmospheric concentrations of SF and sulfur hexafluoride (SF another greenhouse gas, from 1965 through 1999, based on samples obtained from firn (deep consolidated snow) at Dome Concordia (eastern Antarctica).
	cdiac.esd.ornl.gov /trends/otheratg/otheratg.htm (358 words)

	Helium and sulfur hexafluoride bolus washin in short-term microgravity -- Dutrieue et al. 86 (5): 1594 -- Journal of ...
		Helium and sulfur hexafluoride bolus washin in short-term microgravity -- Dutrieue et al.
		Helium and sulfur hexafluoride bolus washin in short-term microgravity
		Anomalous behavior of helium and sulfur hexafluoride during single-breath tests in sustained microgravity.
	jap.physiology.org /cgi/content/full/86/5/1594 (5308 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		Sulfur Hexafluoride CP Size 300 Customer owned CGA 590 Batch Analyzed
		Sulfur Hexafluoride CP Grade 2.8 Size 200 Certs Required
		Sulfur Hexafluoride CP Grade 2.8 Size 200 Batch Analyzed (Cert Required)
	www.airgas.com /browse/product_list.aspx?catID=91 (247 words)

	Sulfur Hexafluoride, SF6 (Site not responding. Last check: 2007-10-22)
		Hurly, D. Defibaugh and M. Moldover, "Thermodynamic Properties of Sulfur Hexafluoride", Int.
		Verdelli, H. Miller, J. Gall, "Some Physical Properties of Sulfur Hexafluoride"; Ind.
		Strehlow and E. Vogel, "Temperature Dependence and Initial Density Dependence of the Viscosity of Sulphur Hexafluoride", Physica A, 1989, 161, 101.
	properties.nist.gov /semiProp/gases/sf6.html (89 words)

	JAWMA Paper: Abatement of Sulfur Hexafluoride Emissions from the Semiconductor Manufacturing Process by ... (Site not responding. Last check: 2007-10-22)
		JAWMA Paper: Abatement of Sulfur Hexafluoride Emissions from the Semiconductor Manufacturing Process by Atmospheric-Pressure Plasmas
		Sulfur hexafluoride (SF6) is an important gas for plasma etching processes in the semiconductor industry.
		SF6 is mainly converted to SOF2, SO2F4, sulfur dioxide (SO2), oxygen difluoride (OF2), and fluoride (F2).
	www.awma.org /Journal/ShowAbstract.asp?Year=&PaperID=1256 (357 words)

	Bulk Process Gases - Sulfur Hexafluoride (Site not responding. Last check: 2007-10-22)
		Sulfur Hexafluoride is used by the Semiconductor industry for plasma etching prior to chemical vapor deposition (CVD).
		Oxygen can be injected into the SF inlet gas stream to react with the Sulfur in the plasma to form volatile Sulfur/Oxygen gases that will also exit the process equipment in the exhaust gas.
		BOC Edwards and the stripe symbol are trade marks of The BOC Group plc.
	www.bocedwards.com /process_gases/bulk/n_sulfur_hexaflouride.html (185 words)

	SF6 Gas, Sulfur Hexafluoride supply - Concorde Science
		Sulfur Hexafluoride (SF Highest quality based on new technology
		Concorde Specialty Gas, Inc. is a prime supplier of high quality virgin SF gas exceeding industry standards.
		The minimum specifications for delivery of Sulfur Hexafluoride (SF follows:
	www.sf6gas.com /sf6.html (240 words)

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