Nitrogenase
Nitrogen Fixation
Alkynes
Tungsten
Tungsten. A metallic element with the atomic symbol W, atomic number 74, and atomic weight 183.85. It is used in many manufacturing applications, including increasing the hardness, toughness, and tensile strength of steel; manufacture of filaments for incandescent light bulbs; and in contact points for automotive and electrical apparatus.
Azotobacter
Nitrosomonas
Hydrocarbons, Acyclic
Ethylenes
Molybdoferredoxin
Nitrous Oxide
Hydrogen
The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.
Deltaproteobacteria
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).
Azotobacter vinelandii
A species of gram-negative, aerobic bacteria first isolated from soil in Vineland, New Jersey. Ammonium and nitrate are used as nitrogen sources by this bacterium. It is distinguished from other members of its genus by the ability to use rhamnose as a carbon source. (From Bergey's Manual of Determinative Bacteriology, 9th ed)
Methane
Molybdenum
Spirillum
Ammonia
Comparative phylogeny of rrs and nifH genes in the Bacillaceae. (1/323)
The rrs (16S rDNA) gene sequences of nitrogen-fixing endospore-forming bacilli isolated from the rhizosphere of wheat and maize were determined in order to infer their phylogenetic position in the Bacillaceae. These rhizosphere strains form a monophyletic cluster with Paenibacillus azotofixans, Paenibacillus polymyxa and Paenibacillus macerans. Two of them (RSA19 and TOD45) had previously been identified as Bacillus circulans (group 2) by phenotypic characterization (API 50CH). Evidence for nitrogen fixation by P. azotofixans, P. polymyxa, P. macerans and putative B. circulans strains RSA19 and TOD45 was provided by acetylene-reduction activity, and confirmed by amplifying and sequencing a nifH fragment (370 nt). The phylogenetic tree of nifH-derived amino acid sequences was compared to the phylogenetic tree of rrs sequences. All Paenibacillus nifH sequences formed a coherent cluster distinct from that of related nitrogen-fixing anaerobic clostridia and Gram-positive high-G+C-content frankiae. The nifH gene was neither detected in the B. circulans type strain (ATCC 4513T) nor in the type strains of Bacillus subtilis, Bacillus cereus, Bacillus alcalophilus, Bacillus simplex, Brevibacillus brevis and Paenibacillus validus. Accordingly, nitrogen fixation among aerobic endospore-forming Firmicutes seems to be restricted to a subset of species in the genus Paenibacillus. (+info)Evidence for involvement of gut-associated denitrifying bacteria in emission of nitrous oxide (N(2)O) by earthworms obtained from garden and forest soils. (2/323)
Earthworms (Aporrectodea caliginosa, Lumbricus rubellus, and Octolasion lacteum) obtained from nitrous oxide (N(2)O)-emitting garden soils emitted 0.14 to 0.87 nmol of N(2)O h(-1) g (fresh weight)(-1) under in vivo conditions. L. rubellus obtained from N(2)O-emitting forest soil also emitted N(2)O, which confirmed previous observations (G. R. Karsten and H. L. Drake, Appl. Environ. Microbiol. 63:1878-1882, 1997). In contrast, commercially obtained Lumbricus terrestris did not emit N(2)O; however, such worms emitted N(2)O when they were fed (i.e., preincubated in) garden soils. A. caliginosa, L. rubellus, and O. lacteum substantially increased the rates of N(2)O emission of garden soil columns and microcosms. Extrapolation of the data to in situ conditions indicated that N(2)O emission by earthworms accounted for approximately 33% of the N(2)O emitted by garden soils. In vivo emission of N(2)O by earthworms obtained from both garden and forest soils was greatly stimulated when worms were moistened with sterile solutions of nitrate or nitrite; in contrast, ammonium did not stimulate in vivo emission of N(2)O. In the presence of nitrate, acetylene increased the N(2)O emission rates of earthworms; in contrast, in the presence of nitrite, acetylene had little or no effect on emission of N(2)O. In vivo emission of N(2)O decreased by 80% when earthworms were preincubated in soil supplemented with streptomycin and tetracycline. On a fresh weight basis, the rates of N(2)O emission of dissected earthworm gut sections were substantially higher than the rates of N(2)O emission of dissected worms lacking gut sections, indicating that N(2)O production occurred in the gut rather than on the worm surface. In contrast to living earthworms and gut sections that produced N(2)O under oxic conditions (i.e., in the presence of air), fresh casts (feces) from N(2)O-emitting earthworms produced N(2)O only under anoxic conditions. Collectively, these results indicate that gut-associated denitrifying bacteria are responsible for the in vivo emission of N(2)O by earthworms and contribute to the N(2)O that is emitted from certain terrestrial ecosystems. (+info)Diversity in butane monooxygenases among butane-grown bacteria. (3/323)
Butane monooxygenases of butane-grown Pseudomonas butanovora, Mycobacterium vaccae JOB5, and an environmental isolate, CF8, were compared at the physiological level. The presence of butane monooxygenases in these bacteria was indicated by the following results. (i) O(2) was required for butane degradation. (ii) 1-Butanol was produced during butane degradation. (iii) Acetylene inhibited both butane oxidation and 1-butanol production. The responses to the known monooxygenase inactivator, ethylene, and inhibitor, allyl thiourea (ATU), discriminated butane degradation among the three bacteria. Ethylene irreversibly inactivated butane oxidation by P. butanovora but not by M. vaccae or CF8. In contrast, butane oxidation by only CF8 was strongly inhibited by ATU. In all three strains of butane-grown bacteria, specific polypeptides were labeled in the presence of [(14)C]acetylene. The [(14)C]acetylene labeling patterns were different among the three bacteria. Exposure of lactate-grown CF8 and P. butanovora and glucose-grown M. vaccae to butane induced butane oxidation activity as well as the specific acetylene-binding polypeptides. Ammonia was oxidized by all three bacteria. P. butanovora oxidized ammonia to hydroxylamine, while CF8 and M. vaccae produced nitrite. All three bacteria oxidized ethylene to ethylene oxide. Methane oxidation was not detected by any of the bacteria. The results indicate the presence of three distinct butane monooxygenases in butane-grown P. butanovora, M. vaccae, and CF8. (+info)Measurement of cardiac output during exercise by open-circuit acetylene uptake. (4/323)
Noninvasive measurement of cardiac output (QT) is problematic during heavy exercise. We report a new approach that avoids unpleasant rebreathing and resultant changes in alveolar PO(2) or PCO(2) by measuring short-term acetylene (C(2)H(2)) uptake by an open-circuit technique, with application of mass balance for the calculation of QT. The method assumes that alveolar and arterial C(2)H(2) pressures are the same, and we account for C(2)H(2) recirculation by extrapolating end-tidal C(2)H(2) back to breath 1 of the maneuver. We correct for incomplete gas mixing by using He in the inspired mixture. The maneuver involves switching the subject to air containing trace amounts of C(2)H(2) and He; ventilation and pressures of He, C(2)H(2), and CO(2) are measured continuously (the latter by mass spectrometer) for 20-25 breaths. Data from three subjects for whom multiple Fick O(2) measurements of QT were available showed that measurement of QT by the Fick method and by the C(2)H(2) technique was statistically similar from rest to 90% of maximal O(2) consumption (VO(2 max)). Data from 12 active women and 12 elite male athletes at rest and 90% of VO(2 max) fell on a single linear relationship, with O(2) consumption (VO(2)) predicting QT values of 9.13, 15.9, 22.6, and 29.4 l/min at VO(2) of 1, 2, 3, and 4 l/min. Mixed venous PO(2) predicted from C(2)H(2)-determined QT, measured VO(2), and arterial O(2) concentration was approximately 20-25 Torr at 90% of VO(2 max) during air breathing and 10-15 Torr during 13% O(2) breathing. This modification of previous gas uptake methods, to avoid rebreathing, produces reasonable data from rest to heavy exercise in normal subjects. (+info)Attributes of atmospheric carbon monoxide oxidation by Maine forest soils. (5/323)
CO, one of the most important trace gases, regulates tropospheric methane, hydroxyl radical, and ozone contents. Ten to 25% of the estimated global CO flux may be consumed by soils annually. Depth profiles for (14)CO oxidation and CO concentration indicated that CO oxidation occurred primarily in surface soils and that photooxidation of soil organic matter did not necessarily contribute significantly to CO fluxes. Kinetic analyses revealed that the apparent K(m) was about 18 nM (17 ppm) and the V(max) was 6.9 micromol g (fresh weight)(-1) h(-1); the apparent K(m) was similar to the apparent K(m) for atmospheric methane consumption, but the V(max) was more than 100 times higher. Atmospheric CO oxidation responded sensitively to soil water regimes; decreases in water content in initially saturated soils resulted in increased uptake, and optimum uptake occurred at water contents of 30 to 60%. However, extended drying led to decreased uptake and net CO production. Rewetting could restore CO uptake, albeit with a pronounced hysteresis. The responses to changing temperatures indicated that the optimum temperature for net uptake was between 20 and 25 degrees C and that there was a transition to net production at temperatures above 30 degrees C. The responses to methyl fluoride and acetylene indicated that populations other than ammonia oxidizers and methanotrophs must be involved in forest soils. The response to acetylene was notable, since the strong initial inhibition was reversed after 12 h of incubation; in contrast, methyl fluoride did not have an inhibitory effect. Ammonium did not inhibit CO uptake; the level of nitrite inhibition was initially substantial, but nitrite inhibition was reversible over time. Nitrite inhibition appeared to occur through indirect effects based on abiological formation of NO. (+info)Noninvasive cardiac output measurement in orthostasis: pulse contour analysis compared with acetylene rebreathing. (6/323)
We tested the reliability of noninvasive cardiac output (CO) measurement in different body positions by pulse contour analysis (CO(pc)) by using a transmission line model (K. H. Wesseling, B. De Wit, J. A. P. Weber, and N. T. Smith. Adv. Cardiol. Phys. 5, Suppl. II: 16-52, 1983). Acetylene rebreathing (CO(rebr)) was used as a reference method. Twelve subjects (age 21-34 yr) were studied: 1) six in whom CO(rebr) and CO(pc) were measured in the standing and 6 degrees head-down tilt (HDT) postures and 2) six in whom CO was measured in the 30 degrees HDT, supine, 30 degrees head up-tilt (HUT), and 70 degrees HUT postures on a tilt table. The CO(rebr)-to-CO(pc) ratio in (near) the supine position during rebreathing was used as the calibration factor for CO(pc) measurements. Calibrated CO(pc) (CO(cal sup)) consistently overestimated CO in the upright posture. The drop in CO with upright posture was underestimated by approximately 50%. CO(cal sup) and CO(rebr) values did not differ in the 30 degrees HDT position. Changes in the CO(rebr)-to-CO(pc) ratio are highly variable among subjects in response to a change in posture. Therefore, CO(pc) must be recalibrated for each subject in each posture. (+info)Two forms of nitrogenase from the photosynthetic bacterium Rhodospirillum rubrum. (7/323)
Acetylene reduction by nitrogenase from Rhodospirillum rubrum, unlike that by other nitrogenases, was recently found by other investigators to require an activation of the iron protein of nitrogenase by an activating system comprising a chromatophore membrane component, adenosine 5'-triphosphate (ATP), and divalent metal ions. In an extension of this work, we observed that the same activating system was also required for nitrogenase-linked H(2) evolution. However, we found that, depending on their nitrogen nutrition regime, R. rubrum cells produced two forms of nitrogenase that differed in their Fe protein components. Cells whose nitrogen supply was totally exhausted before harvest yielded predominantly a form of nitrogenase (A) whose enzymatic activity was not governed by the activating system, whereas cells supplied up to harvest time with N(2) or glutamate yielded predominantly a form of nitrogenase (R) whose enzymatic activity was regulated by the activating system. An unexpected finding was the rapid (less than 10 min in some cases) intracellular conversion of nitrogenase A to nitrogenase R brought about by the addition to nitrogen-starved cells of glutamine, asparagine, or, particularly, ammonia. This finding suggests that mechanisms other than de novo protein synthesis were involved in the conversion of nitrogenase A to the R form. The molecular weights of the Fe protein and Mo-Fe protein components from nitrogenases A and R were the same. However, nitrogenase A appeared to be larger in size, because it had more Fe protein units per Mo-Fe protein than did nitrogenase R. A distinguishing property of the Fe protein from nitrogenase R was its ATP requirement. When combined with the Mo-Fe protein (from either nitrogenase A or nitrogenase R), the R form of Fe protein required a lower ATP concentration but bound or utilized more ATP molecules during acetylene reduction than did the A form of Fe protein. No differences between the Fe proteins from the two forms of nitrogenase were found in the electron paramagnetic resonance spectrum, midpoint oxidation-reduction potential, or sensitivity to iron chelators. (+info)Measurement in vivo of hydrogenase-catalysed hydrogen evolution in the presence of nitrogenase enzyme in cyanobacteria. (8/323)
A method was devised that allows measurement in vivo of hydrogenase-catalysed H2 evolution from the cyanobacterium Anabaena cylindrica, independent of nitrogenase activity, which is also present. Addition of low concentrations of reduced Methyl Viologen (1-10mM) to intact heterocystous filaments of the organism resulted in H2 evolution, but produced conditions giving total inhibition of nitrogenase (acetylene-reducing and H2-evolving) activity. That the H2 formed under these conditions was not contributed to by nitrogenase was also supported by the observation that its rate of formation was similar in the dark or with Ar replaced by N2 in the gas phase, and also in view of the pattern of H2 evolution at very low Methyl Viologen concentrations. Conclusive evidence that the H2 formed in the presence of Methyl Viologen was solely hydrogenase-mediated was its evolution even from nitrogenase-free (non-heterocystous) cultures; by contrast 'uptake' hydrogenase activity in such cultures was greatly decreased. The hydrogenase activity was inhibited by CO and little affected by acetylene. Finally the hydrogenase activity was shown to be relatively constant at different stages during the batch growth of the organism, as opposed to nitrogenase activity, which varied. (+info)Coordination and adsorption of acetylene in the poly[(vinylcyclopentadienyl)manganese] membrane<...
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Acetylene
Wikiquote has quotations related to Acetylene. Wikimedia Commons has media related to Acetylene. Acetylene Production Plant and ... Acetylene has a pKa of 25, acetylene can be deprotonated by a superbase to form an acetylide: HC ≡ CH + RM ⟶ RH + HC ≡ CM {\ ... The enzyme acetylene hydratase catalyzes the hydration of acetylene to give acetaldehyde: C 2 H 2 + H 2 O ⟶ CH 3 CHO {\ ... Berthelot later obtained acetylene directly by passing hydrogen between the poles of a carbon arc. Since the 1950s, acetylene ...
Acetylene hydratase
Because acetylene binding to the Mo in nitrogenase lends some support that the mechanism involves a Mo→CH2=CH2 bond. Acetylene ... Acetylene hydratase (EC 4.2.1.112, AH) is a bacterial enzyme, originally discovered in the anaerobic microorganism Pelobactor ... C2H2 + H2O → CH3CHO The mechanism is thought to involve attachment of acetylene to the metal followed by nucleophilic attack of ... Kroneck PM (March 2016). "Acetylene hydratase: a non-redox enzyme with tungsten and iron-sulfur centers at the active site". ...
Acetylene (album)
Acetylene is a 2005 album by The Walkabouts. It features themes of anger and chaos. All songs by Chris Eckman. "Fuck Your Fear ... "Acetylene" - 3:36 "Before This City Wakes" - 6:02 "The Last Ones" - 9:09 Terri Moeller - drums Michael Wells - bass guitar ... Acetylene (Articles with Italian-language sources (it), Articles with German-language sources (de), Articles needing additional ...
Bis(trimethylsilyl)acetylene
This compound is used as a surrogate for acetylene. BTMSA is prepared by treating acetylene with butyl lithium followed by ... Bis(trimethylsilyl)acetylene (BTMSA) is an organosilicon compound with the formula Me3SiC≡CSiMe3 (Me = methyl). It is a ... doi:10.1016/S0022-328X(00)89260-8. Curtain, M. L.; Wang, C. Bis(trimethylsilyl) acetylene. e-EROS. Rosenthal, Uwe; Burlakov, ... acetylene: Synthesis, Structure, and Chemistry†". Organometallics. 22 (5): 884-900. doi:10.1021/om0208570. (Articles without ...
Colt Acetylene Flash Lantern
The Colt Acetylene Flash Lantern (or Colt Field Signal Lamp) was an acetylene signal lamp produced by the J. B. Colt Company ... 42-. Manual for Operation and Care of Colt Acetylene Flash Lantern. J.B. Colt Company. c. 1900. v t e (All stub articles, ... A description from maneuvers at Fort Riley detailed the device: The Colt's acetylene flash lantern was employed for night ...
Alkyne
... s are traditionally known as acetylenes, although the name acetylene also refers specifically to C2H2, known formally as ... In acetylene, the H-C≡C bond angles are 180°. By virtue of this bond angle, alkynes are rod-like. Correspondingly, cyclic ... H − C ≡ C − H {\displaystyle {\ce {H-C#C}}{\ce {-H}}} Acetylene H − C ≡ C − C , H H , − H {\displaystyle {\ce {H-C#C}}{-}{\ce ... C2H2: acetylene only C3H4: propyne only C4H6: 2 isomers: 1-butyne, and 2-butyne C5H8: 3 isomers: 1-pentyne, 2-pentyne, and 3- ...
Alkynylation
Grignard reagents of acetylene or alkynes can be used to perform alkynylations on compounds that are liable to polymerization ... The principal reaction of interest involves the addition of the acetylene (HC≡HR) to a ketone (R2C=O) or aldehyde (R−CH=O): RR ... The Favorskii reaction is an alternative set of reaction conditions, which involves prereaction of the acetylene with an alkali ... Chemist Walter Reppe pioneered catalytic, industrial-scale ethynylations using acetylene with alkali metal and copper(I) ...
Charles Hoskins
"ACETYLENE EXPLOSION". Sydney Morning Herald (NSW : 1842 - 1954). 9 November 1916. p. 8. Retrieved 27 May 2020. "Family Notices ... Their eldest son, Henry Guildford Hoskins (known as Guildford) was fatally injured in an acetylene gas explosion, in 1916, ...
Alkyne zipper reaction
Acetylene zipper. Exceptionally facile contrathermodynamic multipositional isomeriazation of alkynes with potassium 3- ...
N-Vinylcarbazole
It is produced by the vinylation of carbazole with acetylene in the presence of base. Carbazole Lide, David R. (2008). CRC ... "Acetylene Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a01_097.pub3. ISBN 3527306730. (CS1 ...
1-Ethynylcyclohexanol
Condensation of aldehydes and ketones with acetylene under pressure. New method of synthesis of acetylenic alcohols". Zhurnal ... Nazarov IN, Kotlyarevskii IL, Ryabchenko VF (1953). "Acetylene derivatives. CLX. ...
Tetrabromoethane
"Acetylene tetrabromide". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational ... A B van Haaften (1969). "Acute Tetrabromoethane (Acetylene Tetrabromide) Intoxication in Man". American Industrial Hygiene ...
N-Vinylpyrrolidone
Subsequently, acetylene is used to introduce the vinyl group. Methylpyrrolidone (NMP) 2-Pyrrolidone (2-Py) "1-Vinyl-2- ... It is produced industrially by vinylation of 2-pyrrolidone, i.e. the base-catalyzed reaction with acetylene. It is the ... "Acetylene Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a01_097.pub3. ISBN 3527306730. N- ...
Cyclopropylacetylene
"CYCLOPROPYL ACETYLENE". chemicalland21.com. Retrieved 31 May 2017. Hudson, C.E.; Bauld, N.L. (1972). "Quantitative analysis of ...
1,3-Diaminopropane
Acetylene zipper. Exceptionally facile contrathermodynamic multipositional isomeriazation of alkynes with potassium 3- ...
William Stanley Sykes
Sykes contributed an entry to the 14th edition of the Encyclopaedia Britannica on the experimental use of acetylene as an ... William Stanley Sykes (1930). "Acetylene in medicine". Encyclopaedia Britannica. Vol. 1 (14 ed.). p. 119. Photographic ...
François Diederich
Diederich, François; Stang, Peter J.; Tykwinski, R. R. (2005). Acetylene Chemistry : chemistry, biology and material science. ... Stang, Peter J.; Diederich, François (1995). Modern acetylene chemistry. Weinheim: VCH. ISBN 3-527-29084-2. OCLC 34027354. " ... chiral macrocyclic and acyclic alleno-acetylenes, amplification of chirality and its transfer from the molecular to the ...
Diiodoacetylene
Henning Hopf; Bernhard Witulski (1995). "Functionalized Acetylenes in Organic Synthesis ‐ The Case of the 1‐Cyano‐ and the 1‐ ... Halogenoacetylenes". In Stang, Peter J.; Diederich, François (eds.). Modern Acetylene Chemistry. Weinheim: VCH. pp. 33-66. doi: ...
Jeffrey S. Moore
Young, James K.; Moore, Jeffrey S. (1995). "Chapter 12: Acetylenes in nanostructures". In Stang, P.J.; Diederich, F. (eds.). ... Modern acetylene chemistry. Weinheim: VCH. pp. 415-418. ISBN 9783527290840. Hill, David J.; Mio, Matthew J.; Prince, Ryan B.; ...
Dichloroacetylene
"Functionalized Acetylenes in Organic Synthesis ‐ The Case of the 1‐Cyano‐ and the 1‐Halogenoacetylenes". In Stang, Peter J.; ... Diederich, François (eds.). Modern Acetylene Chemistry. Weinheim: VCH. pp. 33-66. doi:10.1002/9783527615278.ch02. ISBN ...
Neurine
Acetylene reactions. Part IV. Formation of trimethylvinyl- and tetramethyl-ammonium hydroxide from acetylene and aqueous ... Synthetically, neurine can be prepared by the reaction of acetylene with trimethylamine. Neurine is unstable and decomposes ...
Metalloprotein
Living on acetylene. A Primordial Energy Source". In Kroneck, Peter M. H.; Sosa Torres, Martha E. (eds.). The Metal-Driven ...
Tungsten
Acetylene hydratase is an unusual metalloenzyme in that it catalyzes a hydration reaction. Two reaction mechanisms have been ... ten Brink, Felix (2014). "Chapter 2. Living on acetylene. A Primordial Energy Source". In Peter M.H. Kroneck; Martha E. Sosa ...
Dimethyl acetylenedicarboxylate
Sahoo, Manoj (2007). "Dimethyl Acetylene Dicarboxylate". Synlett. 2007 (13): 2142-2143. doi:10.1055/s-2007-984894. Bandrowski, ...
List of English words of French origin (A-C)
acétique) acetylene, (Fr. acétylène) achieve, (Old Fr. achever) achievement, (Fr. achèvement) acid, (Fr. acide) aconite, (Fr. ...
Julius Nieuwland
He is known for his contributions to acetylene research and its use as the basis for one type of synthetic rubber, which ... During his doctoral studies into the chemistry of acetylene, he discovered the chemical compound lewisite, which would later ... In 1920, he successfully polymerized acetylene into divinylacetylene. Elmer Bolton, the Director of Research at DuPont, used ... S2CID 85968031.[permanent dead link] Nieuwland, Julius Arthur (1904). Some Reactions of Acetylene. Notre Dame, Indiana: Notre ...
McKeen Motor Car Company
Lighting was originally acetylene. Most of the problems experienced with McKeen cars involved the powerplant and drivetrain. As ...
Cyclooctatetraene
Reppe's synthesis of cyclooctatetraene, which involves treating acetylene at high pressure with a warm mixture of nickel ... I. Über Cyclooctatetraen" [Ring-forming polymerization of acetylene. I. Cyclooctatetraene]. Justus Liebigs Annalen der Chemie. ... Kunichika, Sango (1953). "Cyclopolyolefins Derived from Acetylene". Bulletin of the Institute for Chemical Research, Kyoto ... one-step synthesis of cyclooctatetraene from acetylene, providing material identical to that prepared by Willstätter. Any ...
Trinitromethane
See also: Nieuwland, Julius A.; Vogt, Richard R. (1945). The Chemistry of Acetylene. New York City, New York, USA: Reinhold ... The Italian chemist Adolfo Baschieri discovered that nitroform (Italian: nitroformio) could be produced from acetylene ( ... it was discovered that nitroform can be produced by the reaction of acetylene with anhydrous nitric acid. This method went on ... On the behavior of acetylene with some oxidizers]. Atti della Reale Accademia dei Lincei. 5th series (in Italian). 9 (part I): ...
Calcium carbide
Applications of calcium carbide include manufacture of acetylene gas, generation of acetylene in carbide lamps, manufacture of ... Approximately 400,000 tonnes are produced this way annually (see Acetylene Preparation). In China, acetylene derived from ... Today acetylene is mainly manufactured by the partial combustion of methane or appears as a side product in the ethylene stream ... CaC2(s) + 2H2O(aq) → C2H2(g) + Ca(OH)2(aq) This reaction was the basis of the industrial manufacture of acetylene, and is the ...
Oxy Acetylene Welding - Fittings 100
Acetylene Craftsman Oxy Acetylene 315C Handle Tip 1-1-101 Harris Oxy Acetylene Acetylene Torch Hoses Smith Oxygen Acetylene ... Oxy Acetylene Stage Acetylene Oxygen Acetylene Regulator Gauge Regulator Vts Torch Handle Model Acetylene Propane Acetylene ... Torch Body Welding Torch Kit Oxygen Acetylene Hose Acetylene Heating Acetylene Gas Cutting Heating Torch Tip Oxygen Acetylene ... Cutting Acetylene Hoses Oxy Acetylene Welding Brazing Uniweld Oxygen Refurbished Victor Prest-O-Lite Acetylene Torch Acetylene ...
Acetylene tetrabromide (2005-110) | NIOSH | CDC
Acetylene - Scientific American
ICSC 0089 - ACETYLENE
The substance may polymerize. Decomposes on heating and increasing pressure. This generates fire and explosion hazard. The substance is a strong reducing agent. It reacts violently with oxidants and fluorine or chlorine under influence of light. This generates fire and explosion hazard. Reacts with copper, silver, mercury and their salts. This produces shock-sensitive compounds (acetylides ...
Acetylene | C2H2 - PubChem
Chemical Database: Acetylene tetrachloride (EnvironmentalChemistry.com)
This page contains information on the chemical Acetylene tetrachloride including: 51 synonyms/identifiers; U.S. Code of Federal ... Acetylene tetrachloride. Identifications. *Formula: CHCl2CHCl2. Elements: Carbon, Chlorine, Hydrogen. *CAS Number: 79-34-5* ... Acetylene tetrachloride (EnvironmentalChemistry.com),/a,- This page contains information on the chemical Acetylene ... Acetylene tetrachloride*Bonoform*Cellon*Dichloro-2,2-dichloroethane*EPA Pesticide Chemical Code: 078601*Ethane, 1,1,2,2- ...
acetylene clipart & stock photography | Acclaim Images
Occupational exposure to acetylene
Acetylene/poisoning Environmental Exposure Occupational Diseases/chemically Induced Occupational Diseases/prevention & Control ... Title : Occupational exposure to acetylene Corporate Authors(s) : National Institute for Occupational Safety and Health. ... "Criteria document giving recommendations for an occupational exposure standard for acetylene (74862). Sections include ... recommendations for an acetylene standard based on environmental, medical, labeling and posting and other factors; biologic ...
Oxy Acetylene Welding - Airco Regulator
Acetylene Craftsman Oxy Acetylene 315C Handle Tip 1-1-101 Harris Oxy Acetylene Acetylene Torch Hoses Smith Oxygen Acetylene ... Oxy Acetylene Stage Acetylene Oxygen Acetylene Regulator Gauge Regulator Vts Torch Handle Model Acetylene Propane Acetylene ... Airco "piggyback" Acetylene Regulator. Aircopiggyback Acetylene Regulator Old Airco piggyback style acetylene regulator. ... Torch Body Welding Torch Kit Oxygen Acetylene Hose Acetylene Heating Acetylene Gas Cutting Heating Torch Tip Oxygen Acetylene ...
Stoichiometry in Combustion of Acetylene | Flinn Scientific
TurboTorch A-3 Replacement Tip, Air Acetylene - PexUniverse
ACETYLENE European Pipe Marker | Graphic Products
Harris Acetylene Cutting Tip #2 (1 - 2 in.) | HobartWelders
BCGA issue safety alert revision for acetylene regulator hazards
Due to the occurrence of incidents and potential for explosions involving the use of incompatible regulators with acetylene gas ... Due to its flammable nature, acetylene - commonly used in welding and cutting - has the potential to cause an explosion when ... The use of unsuitable regulators for acetylene is not only dangerous but also constitutes an illegal practice. A regulator not ... Due to the occurrence of incidents and potential for explosions involving the use of incompatible regulators with acetylene gas ...
Acetylene Cutting Tips - Uniweld Products, Inc.
Thermodynamic Properties of Acetylene Using Cubic Equations of State - Wolfram Demonstrations Project
Thermodynamic Properties of Acetylene Using Cubic Equations of State. Initializing live version ... In this Demonstration, the compressibility factor for a single gas chemical species (acetylene) is computed, from which the ... are the critical pressure and temperature for acetylene. For an ideal gas . ... Brian G. Higgins Thermodynamic Properties of Acetylene Using Cubic Equations of State. http://demonstrations.wolfram.com/ ...
Bar Mills 2012 HO Acetylene Tank Cluster Unpainted - 3 Groupings
- Trainz
This is an Bar Mills 2012 HO Scale Acetylene Tank Cluster Unpainted 3 Groupings.Condition: Factory New (C-9)Operational Status ... Bar Mills 2012 HO Acetylene Tank Cluster Unpainted - 3 Groupings. Bar Mills 2012 HO Acetylene Tank Cluster Unpainted - 3 ... Bar Mills 2012 HO Acetylene Tank Cluster Unpainted - 3 Groupings /*! CSS Used from: base.css */ @media all { .contains-media, . ... Decrease quantity for Bar Mills 2012 HO Acetylene Tank Cluster Unpainted - 3 Groupings Increase quantity for Bar Mills 2012 HO ...
David Fulmer: Sky's Acetylene | Catalogue | New Focus Recordings
Skys Acetylene was commissioned and premiered by The New York Philharmonic as part of their CONTACT! series. This EP release ... Skys Acetylene was commissioned and premiered by The New York Philharmonic as part of their CONTACT! series. This EP release ... Skys Acetylene is a kaleidoscopic work for flute, harp, percussion, piano, and double bass that balances taut anticipation ... David Fulmers Skys Acetylene was written for and commissioned by the New York Philharmonic on the occasion of their 175th ...
Global fitting of vibration-rotation line positions of acetylene molecule in the far- and middle-infrared regions | (2004) |...
1.Oxy-Acetylene Welding, Cutting/ Brazing | NCCRS
Course 1: Introduction to oxy-acetylene welding; oxy-acetylene equipment; set-up procedures for oxy-acetylene welding; oxy- ... 1.Oxy-Acetylene Welding, Cutting/ Brazing 2.Basic Shield Metal Arc Welding ... acetylene flame adjustment; fusion without filler metal; fusion welding with filler metal; fillet welding lap joint horizontal ... and safe handling and use of oxy-acetylene equipment; identify metals by spark test, magnetic test, physical appearance and ...
Pressure Regulating Station 684NGA (acetylene) | wittgas.com
How to Make a Metal Ring Using an Oxygen-Acetylene Welding Torch | Kevin Caron
In this video Arizona sculptor Kevin Caron shows how to make a metal ring using an oxygen-acetylene welding torch. ... Kevin transforms a section of a truck coil spring into a metal ring using an oxygen-acetylene torch, tongs and a big hammer. ... How to Make a Metal Ring Using an Oxygen-Acetylene Welding Torch. ...
Nextteq Acetylene Detector Tubes 50-1,000 ppm, pk/10 - AFC International
Goss KA-125-M12 Acetylene Regulator Kit | PlumbersStock
Buy now and enjoy the Goss KA-125-M12 Acetylene Regulator Kit from PlumbersStock online - the hardware project leaders. ... This fixture is fueled with acetylene; acetylene is a style of cutting that burns 2 combustible fuel gases to create the flame ... This regulator is designed to go with Goss Hand torch Air acetylene assemblies that are used for the cutting of metal and also ... This Goss KA-125-M Acetylene Regulator Kit is made of a durable heat resistant brass so it can withstand the intense ...
Diamond Tool: 2200 Replacement Oxy-Acetylene Gauge - 200 psi
The Oxy-acetylene Handbook First Edition 3rd Printing 1945 Linde 588 pgs HC - IRA Hydraulic Pump Technical support and service
The Oxy-acetylene Handbook First Edition 3rd Printing 1945 Linde 588 pgs HC IRA Hydraulic Pump Technical support and service ... The Oxy-acetylene Handbook First Edition 3rd Printing 1945 Linde 588 pgs HC MODELS. Need a CAD or 3D Model? ... The Oxy-acetylene Handbook First Edition 3rd Printing 1945 Linde 588 pgs HC IRA Hydraulic Pump Technical support and service ... The Oxy-acetylene Handbook First Edition 3rd Printing 1945 Linde 588 pgs HC Compare similar products ...
Harris 1390 Separable Acetylene Welding and Brazing Tip Size 8 1600100
Buy Harris 1390 Separable Acetylene Welding and Brazing Tip Size 8 today at the lowest prices anywhere. Fast, free shipping. ... Harris 1390 Separable Acetylene Welding and Brazing Tip Size 13 1600160 $69.00 $73.46 ... Harris 1390 Separable Acetylene Welding and Brazing Tip Size 0 1600020 $27.00 ... Harris 1390 Separable Acetylene Welding and Brazing Tip Size 3 1600050 $27.00 ...
ACETYLENE 50-1,000 ppm Gas Detection Tubes | Environmental Monitoring Systems
AS 4289 Oxygen and Acetylene Gas Reticulation Systems - WA - Australian Business Licence and Information Service
AS 4289 Oxygen and Acetylene Gas Reticulation Systems - Western Australia. Description. You may need to comply with this ... AS 4289-1995 Oxygen and Acetylene Gas Reticulation Systems (Opens in new window) ... operation and maintenance of gaseous oxygen and acetylene piping, manifolds and equipment used for the reticulation of these ... standard if you intend to design, manufacture or use oxygen and acetylene gas reticulation systems. ...
Welding4
- Due to its flammable nature, acetylene - commonly used in welding and cutting - has the potential to cause an explosion when utilised with an unsuitable regulator. (gasworld.com)
- This regulator is designed to go with Goss Hand torch Air acetylene assemblies that are used for the cutting of metal and also welding. (plumbersstock.com)
- Application: acetylene hose designed for welding, cutting and allied processes. (everflex-rubber-hose.com)
- Specific welding hose catering for oxygen, carbon dioxide, nitrogen, argon and fuel gases including acetylene, natural gas, methane and propane available upon request. (everflex-rubber-hose.com)
Oxygen and acetylene5
- Suitable for Use with Oxygen and Acetylene. (troutunderground.com)
- You may need to comply with this standard if you intend to design, manufacture or use oxygen and acetylene gas reticulation systems. (business.gov.au)
- This standard specifies requirements for the design, assembly, installation, testing, operation and maintenance of gaseous oxygen and acetylene piping, manifolds and equipment used for the reticulation of these gases in industrial and laboratory applications. (business.gov.au)
- This balanced Blowpipe is for versatile applications using Oxygen and Acetylene. (hindmedico.com)
- Figure 11-41 illustrates the differences between oxygen and acetylene hose nuts. (halversoncts.com)
Torch3
- Up for auction is a Purox R-2047 2 stage acetylene torch regulator gauge. (troutunderground.com)
- Must be able to use oxy/acetylene torch for copper soldering. (utilitytrailer.com)
- However, one torch cutter was overexposed to cadmium and another worker (and possibly three others) was overexposed to CO. The elevated cadmium and CO levels were the result of workers using oxy-acetylene cutting torches and gasoline-powered cutting saws. (cdc.gov)
Regulator6
- Airco 8401 Acetylene Pressure Regulator Looks good, from estate sale. (troutunderground.com)
- This Goss KA-125-M Acetylene Regulator Kit is a genuine Goss regulator perfect for professional welders and recreational applications. (plumbersstock.com)
- This Goss KA-125-M Acetylene Regulator Kit is made of a durable heat resistant brass so it can withstand the intense temperatures associated with this style of cutting. (plumbersstock.com)
- This Goss KA-125-M Acetylene Regulator Kit comes with the outstanding protection of the Limited three year Goss Warranty. (plumbersstock.com)
- Acetylene is a regulator for plant growth. (abiblo.com)
- The regulator and hose fittings used for acetylene have left-hand threads , and the hose fitting nut may be marked " ACE . (halversoncts.com)
Gases5
- This hose is compatible with all fuel gases including oxy/acetylene, propane, propylene, and MAPP. (troutunderground.com)
- Due to the occurrence of incidents and potential for explosions involving the use of incompatible regulators with acetylene gas, the British Compressed Gases Association (BCGA) has issued a revision to Safety Alert 01 - The hazards of using incompatible regulatory with acetylene. (gasworld.com)
- acetylene is a style of cutting that burns 2 combustible fuel gases to create the flame rather than air and 1 combustible, acetylene combined with oxygen from a separate tank for example. (plumbersstock.com)
- Acetylene hose only for fuel service and is compatible with commonly used fuel gases, including acetylene, hydrogen, natural gas, propane and propylene. (everflex-rubber-hose.com)
- However, the red hose is usually used for carrying acetylene or other fuel gases. (halversoncts.com)
Hydrogen1
- Fuel is hydrogen or acetylene. (steel-pipelines.com)
Benzene3
- Gadre, Shridhar R. (2002) H...π complexes of acetylene-benzene: a matrix isolation and computational study Journal of Molecular Structure, 613 (1-3). (ias.ac.in)
- Formation of the adduct was evidenced by shifts in the vibrational frequencies of the acetylene and benzene submolecules in the complex. (ias.ac.in)
- Though our computations showed two types of 1:1 complexes-one where the acetylene is the proton donor and another where the benzene is the proton donor, experimentally, we observed only the complex, where acetylene acts as a proton donor to the p cloud of benzene. (ias.ac.in)
Hydrocarbon gas1
- Acetylene is a form of hydrocarbon gas. (abiblo.com)
Argon1
- 700 Series Provides A Wide Range Of Utility For Handling Oxygen, Acetylene, Nitrogen, Helium, Argon And Other Gas Cylinders. (handtrucksrus.com)
Combustible2
- The non-blooming tube of acetylene hose minimizes the migration of combustible waxes or plasticizers to the surface of the rubber, and the multiple plies of textile reinforcement provide flexibility. (everflex-rubber-hose.com)
- If oxygen were to pass down a used acetylene hose, a combustible mixture would form. (halversoncts.com)
Ethylene2
- The chemisorption of acetylene and ethylene on platinum (111) surfaces for T ≥ 300 K has been studied with ultraviolet photoelectron spectroscopy (UPS) at 21.2 eV. (northwestern.edu)
- Ethylene is founf to dehydrogenate at room temperature to the stable acetylene species on Pt(111) surfaces. (northwestern.edu)
Cutting Tip1
- Harris Acetylene Cutting Tip #2 (1 - 2 in. (hobartwelders.com)
Flame2
- Acetylene hose featuring a flame resistant and oil resistant tube and cover. (everflex-rubber-hose.com)
- With the acetylene-oxygen-flame temperatures of up to 3100 °C are achievable. (ewo.de)
Cylinders1
- An entire team of fire-fighting robots was recently unveiled by defense contractor QinetiQ at a demonstration in London, where a quartet of robots were more than battle-ready to tackle the particular risk of fires involving cylinders of the industrial gas acetylene. (geekspeak.org)
Temperature1
- are the critical pressure and temperature for acetylene. (wolfram.com)
Torches2
- This is a complete replacement tip (not just a tip end) for standard, non-self-lighting TurboTorch air acetylene torches. (pexuniverse.com)
- Hose for oxygen and burnable gas according to DIN EN ISO 3821 for connetion of torches and bottle (cut goods - roll 40 m). (ewo.de)
Nitrogen1
- Nitrogen fixation was measured in situ for the first time by acetylene reduction for a greyish mat composed of Scytonema julianum in cave-like environments. (usf.edu)
Furnace black1
- Carbon black is variously known as acetylene black, channel black, furnace black, lampblack or thermal black depending on the specific process by which it is manufactured. (who.int)
Descriptor1
- Acetylene" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (jefferson.edu)
Specially designed1
- However, reels specially designed for oxygen/acetylene hose can efficiently handle much longer lengths of hose, Figure 11-37 . (halversoncts.com)
Fuel3
- Acetylene Tube Borium is an oxy-fuel rod intended for metal-to-earth applications involving extreme abrasion and low impact. (tungco.com)
- Acetylene hose is available in long continuous lengths, providing maximum versatility and ease of handling in a variety of applications where only acetylene hose is needed or where the fuel gas and oxygen sources are separated, and twin line hose is not practical. (everflex-rubber-hose.com)
- In the present study an experimental investigation was carried out with acetylene as an alternative fuel in a compression ignition engine. (nitrkl.ac.in)
Tubes1
- Stoichiometry in Combustion of Acetylene demonstrates how to collect varying amounts of acetylene gas and air in small test tubes. (flinnsci.com)
Carbon1
- In MetaCyc pathway analysis, the major pathways of metabolism existed in the bacteria from the two hot springs were 'pyruvate fermentation to isobutanol (engineered)', 'acetylene degradation', 'carbon fixation pathways in prokaryotes', 'nitrate reduction I (denitrification)', 'methanogenesis from acetate', 'superpathway of glucose and xylose degradation', etc. (bvsalud.org)
Hydrocarbons1
- WO2013186291A1 ] The invention relates to a method for producing acetylene and synthesis gas by partially oxidizing hydrocarbons by means of oxygen. (epo.org)
Pipe1
- Improve facility safety with Acetylene European Pipe Marker. (graphicproducts.com)
Lamps1
- In the renovation the locomotive was rebuilt to her 1920s outfit by painting her black instead of dark green, the valve gear was rebuilt to original, the smoke stack was changed, and the acetylene lamps of the locomotive were rebuilt. (jokioistenmuseorautatie.fi)
Safety1
- Title : Occupational exposure to acetylene Corporate Authors(s) : National Institute for Occupational Safety and Health. (cdc.gov)
Standard2
- Criteria document giving recommendations for an occupational exposure standard for acetylene (74862). (cdc.gov)
- Original English text of CSN EN Standard. (en-standard.eu)
Equipment1
- Advanced technology and equipment to make the best quality acetylene hose. (everflex-rubber-hose.com)
Plant1
- As soon as they go into operation, also the flares of the acetylene plant and the aromatics plant on Friesenheimer Insel can be seen from far away. (basf.com)
Made1
- Gas black" made from natural gas, known as "black" by oil, and "acetylene black" made from acetylene. (helios.net.cn)
General1
- Acetylene General Purpose Cutting. (saezdistributors.com)
Market1
- Acetylene Market Overview The acetylene market size is estimated to reach USD13.6 billion by 2027 after growing at a CAGR of around 4.3% from 2022 to 2027. (icrowdnewswire.com)