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.
Molybdenum
Nevada
Cobalt
Probing the function of the conserved tryptophan in the flexible loop of the Yersinia protein-tyrosine phosphatase. (1/170)
The involvement of the strictly conserved Trp354 residue in the catalysis of the Yersinia protein tyrosine phosphatase (PTPase) has been investigated by site-directed mutagenesis and kinetic studies. Crystallographic structural data have revealed that Trp354 interacts with the active site Arg409 and is located at one of the hinge positions of the flexible surface loop (WpD loop) which also harbors the general acid/base (Asp356) essential for catalysis [Schubert, H. L., Fauman, E. B., Stuckey, J. A., Dixon, J. E. & Saper, M. A. (1995) Protein Sci. 4, 1904-1913]. Two mutants were constructed and expressed that contained the Trp354-->Phe and Trp354-->Ala substitutions. The K(m) of the W354F and W354A mutants were not significantly different from that of the wild-type. However, a major decrease in the affinity for oxyanions was observed for the mutants, which is consistent with Trp354 playing a role in aligning Arg409 for oxyanion binding. In addition replacement of Trp354 with Phe or Ala caused a decrease in kcat of 200-fold and 480-fold, respectively, and impaired the ability of the mutant enzymes to stabilize the negative charge in the leaving group at the transition state. In fact, the W354F and W354A mutants exhibited catalytic efficiency and leaving group dependency similar to those observed for the general acid-deficient PTPase D356N. These results indicate that Trp354 is an important residue that keeps the WpD loop in a catalytically competent conformation and positions the general acid/base Asp356 in the correct orientation for proton transfer. (+info)Isolation of acetate auxotrophs of the methane-producing archaeon Methanococcus maripaludis by random insertional mutagenesis. (2/170)
To learn more about autotrophic growth of methanococci, we isolated nine conditional mutants of Methanococcus maripaludis after transformation of the wild type with a random library in pMEB.2, a suicide plasmid bearing the puromycin-resistance cassette pac. These mutants grew poorly in mineral medium and required acetate or complex organic supplements such as yeast extract for normal growth. One mutant, JJ104, was a leaky acetate auxotroph. A plasmid, pWDK104, was recovered from this mutant by electroporation of a plasmid preparation into Escherichia coli. Transformation of wild-type M. maripaludis with pWDK104 produced JJ104-1, a mutant with the same phenotype as JJ104, thus establishing that insertion of pWDK104 into the genome was responsible for the phenotype. pWDK104 contained portions of the methanococcal genes encoding an ABC transporter closely related to MJ1367-MJ1368 of M. jannaschii. Because high levels of molybdate, tungstate, and selenite restored growth to wild-type levels, this transporter may be specific for these oxyanions. A second acetate auxotroph, JJ117, had an absolute growth requirement for either acetate or cobalamin, and wild-type growth was observed only in the presence of both. Cobinamide, 5', 6'-dimethylbenzimidazole, and 2-aminopropanol did not replace cobalamin. This phenotype was correlated with tandem insertions in the genome but not single insertions and appeared to have resulted from an indirect effect on cobamide metabolism. Plasmids rescued from other mutants contained portions of ORFs denoted in M. jannaschii as endoglucanase (MJ0555), transketolase (MJ0681), thiamine biosynthetic protein thiI (MJ0931), and several hypothetical proteins (MJ1031, MJ0835, and MJ0835.1). (+info)Selenium-containing xanthine dehydrogenase from Eubacterium barkeri. (3/170)
A specific dehydrogenase, different from nicotinic acid hydroxylase, was induced during growth of Eubacterium barkeri on xanthine. The protein designated as xanthine dehydrogenase was enriched 39-fold to apparent homogeneity using a three-step purification scheme. It exhibited an NADP-dependent specific activity of 164 micromol xanthine oxidized per min and per mg of protein. In addition it showed an NADPH-dependent oxidase and diaphorase activity. A molecular mass of 530 kDa was determined for the native enzyme and SDS/PAGE revealed three types of subunits with molecular masses of 17.5, 30 and 81 kDa indicating a dodecameric native structure. Molybdopterin was identified as the molybdenum-complexing cofactor using activity reconstitution experiments and fluorescence measurements after KI/I2 oxidation. The molecular mass of the cofactor indicated that it is of the dinucleotide type. The enzyme contained iron, acid-labile sulfur, molybdenum, tungsten, selenium and FAD at molar ratios of 17.5, 18.4, 2.3, 1.1, 0.95 and 2.8 per mol of native enzyme. Xanthine dehydrogenase was inactivated upon incubation with arsenite, cyanide and different purine analogs. Reconstitution experiments of xanthine dehydrogenase activity by addition of selenide and selenite performed with cyanide-inactivated enzyme and with chloramphenicol-treated cells, respectively, indicated that selenium is not attached to the protein in a covalently bound form such as selenocysteine. (+info)Radioprotective effects of sodium tungstate on hematopoietic injury by exposure to 60Co gamma-rays in Wistar rats. (4/170)
Radioprotective effects of sodium tungstate (ST) on 60Co gamma-ray induced decrease in hematocrit value and in survival rate in Wistar strain male rats were examined. A long-term administration of ST (less than 150 mg/kg body weight/day) for 60-300 days had no significant effects on body and organs weights and survival days. The LD50/60 in 20 weeks old rats was 220 mg/kg body weight/day. Daily administration of 38, 75 or 150 mg from 7 days before and after irradiation to 60 days significantly mitigated the decrease in hematocrit values, especially at 23 days after irradiation (P < 0.05). The highest mitigation rate of the decrease in hematocrit value was observed in rats administered at a dose of 38 mg ST/day. Simultaneously, a dose of 38 mg ST/day inhibited lethal effect of 60Co gamma-rays significantly. The dose-reduction factor for survival of 38 mg ST administered rats was 1.14. (+info)Sulfonates as terminal electron acceptors for growth of sulfite-reducing bacteria (Desulfitobacterium spp.) and sulfate-reducing bacteria: effects of inhibitors of sulfidogenesis. (5/170)
This study demonstrates the ability of Desulfitobacterium spp. to utilize aliphatic sulfonates as terminal electron acceptors (TEA) for growth. Isethionate (2-hydroxyethanesulfonate) reduction by Desulfitobacterium hafniense resulted in acetate as well as sulfide accumulation in accordance with the expectation that the carbon portion of isethionate was oxidized to acetate and the sulfur was reduced to sulfide. The presence of a polypeptide, approximately 97 kDa, was evident in isethionate-grown cells of Desulfitobacterium hafniense, Desulfitobacterium sp. strain PCE 1, and the two sulfate-reducing bacteria (SRB)-Desulfovibrio desulfuricans IC1 (T. J. Lie, J. R. Leadbetter, and E. R. Leadbetter, Geomicrobiol. J. 15:135-149, 1998) and Desulfomicrobium norvegicum; this polypeptide was not detected when these bacteria were grown on TEA other than isethionate, suggesting involvement in its metabolism. The sulfate analogs molybdate and tungstate, effective in inhibiting sulfate reduction by SRB, were examined for their effects on sulfonate reduction. Molybdate effectively inhibited sulfonate reduction by strain IC1 and selectively inhibited isethionate (but not cysteate) reduction by Desulfitobacterium dehalogenans and Desulfitobacterium sp. strain PCE 1. Desulfitobacterium hafniense, however, grew with both isethionate and cysteate in the presence of molybdate. In contrast, tungstate only partially inhibited sulfonate reduction by both SRB and Desulfitobacterium spp. Similarly, another inhibitor of sulfate reduction, 1,8-dihydroxyanthraquinone, effectively inhibited sulfate reduction by SRB but only partially inhibited sulfonate reduction by both SRB and Desulfitobacterium hafniense. (+info)Analysis of genes encoding an alternative nitrogenase in the archaeon Methanosarcina barkeri 227. (6/170)
Methanosarcina barkeri 227 possesses two clusters of genes potentially encoding nitrogenases. We have previously demonstrated that one cluster, called nif2, is expressed under molybdenum (Mo)-sufficient conditions, and the deduced amino acid sequences for nitrogenase structural genes in that cluster most closely resemble those for the Mo nitrogenase of the gram-positive eubacterium Clostridium pasteurianum. The previously cloned nifH1 from M. barkeri shows phylogenetic relationships with genes encoding components of eubacterial Mo-independent eubacterial alternative nitrogenases and other methanogen nitrogenases. In this study, we cloned and sequenced nifD1 and part of nifK1 from M. barkeri 227. The deduced amino acid sequence encoded by nifD1 from M. barkeri showed great similarity with vnfD gene products from vanadium (V) nitrogenases, with an 80% identity at the amino acid level with the vnfD gene product from Anabaena variabilis. Moreover, there was a small open reading frame located between nifD1 and nifK1 with clear homology to vnfG, a hallmark of eubacterial alternative nitrogenases. Stimulation of diazotrophic growth of M. barkeri 227 by V in the absence of Mo was demonstrated. The unusual complement of nif genes in M. barkeri 227, with one cluster resembling that from a gram-positive eubacterium and the other resembling a eubacterial V nitrogenase gene cluster, suggests horizontal genetic transfer of those genes. (+info)Pharmacokinetics of sodium tungstate in rat and dog: a population approach. (7/170)
Sodium tungstate has been found to correct hyperglycemia in insulin- and noninsulin-dependent models of diabetes when administered in drinking fluid with a low degree of toxicity; thus, it provides a potential treatment for diabetes. In the present report, pharmacokinetic studies with sodium tungstate were carried out in the Sprague-Dawley rat and beagle dog. This drug was administered either i.v. (8.97 mg/kg in rat; 25 and 50 mg/kg in dog) or orally in the form of solution (35.9 and 107.7 mg/kg in rat; 25 and 50 mg/kg in dog). Tungsten was quantified using an inductively coupled plasma method. Pharmacokinetic parameters were estimated using a population approach. Sodium tungstate followed first order kinetics, and plasma concentration-versus-time data were adequately described by a two-compartment model. In rat, bioavailability was high (92%), whereas it was lower in dog (approximately 65%). The total volume of distribution expressed by unit of body weight was much higher when the animal was smaller (0.46 l/kg in rat versus 0.23 l/kg in dog). The total body clearance normalized by weight, 0.19 l/h/kg in rat versus 0.043 l/h/kg in dog, changed as for the volume of distribution. The elimination half-life was two times higher in dog (approximately 4 h) than in rat (approximately 1.7 h). In the range of 35.9 to 107.7 mg/kg after oral administration in rat and 25 to 50 mg/kg after oral and i.v. administration in dog, tungsten plasma concentrations increased in proportion to dose. (+info)Auxin-induced ethylene triggers abscisic acid biosynthesis and growth inhibition. (8/170)
The growth-inhibiting effects of indole-3-acetic acid (IAA) at high concentration and the synthetic auxins 7-chloro-3-methyl-8-quinolinecarboxylic acid (quinmerac), 2-methoxy-3,6-dichlorobenzoic acid (dicamba), 4-amino-3,6, 6-trichloropicolinic acid (picloram), and naphthalene acetic acid, were investigated in cleavers (Galium aparine). When plants were root treated with 0.5 mM IAA, shoot epinasty and inhibition of root and shoot growth developed during 24 h. Concomitantly, 1-aminocyclopropane-1-carboxylic acid (ACC) synthase activity, and ACC and ethylene production were transiently stimulated in the shoot tissue within 2 h, followed by increases in immunoreactive (+)-abscisic acid (ABA) and its precursor xanthoxal (xanthoxin) after 5 h. After 24 h of treatment, levels of xanthoxal and ABA were elevated up to 2- and 24-fold, relative to control, respectively. In plants treated with IAA, 7-chloro-3-methyl-8-quinolinecarboxylic acid, naphthalene acetic acid, 2-methoxy-3,6-dichlorobenzoic acid, and 4-amino-3,6,6-trichloropicolinic acid, levels of ethylene, ACC, and ABA increased in close correlation with inhibition of shoot growth. Aminoethoxyvinyl-glycine and cobalt ions, which inhibit ethylene synthesis, decreased ABA accumulation and growth inhibition, whereas the ethylene-releasing ethephon promoted ABA levels and growth inhibition. In accordance, tomato mutants defective in ethylene perception (never ripe) did not produce the xanthoxal and ABA increases and growth inhibition induced by auxins in wild-type plants. This suggests that auxin-stimulated ethylene triggers ABA accumulation and the consequent growth inhibition. Reduced catabolism most probably did not contribute to ABA increase, as indicated by immunoanalyses of ABA degradation and conjugation products in shoot tissue and by pulse experiments with [(3)H]-ABA in cell suspensions of G. aparine. In contrast, studies using inhibitors of ABA biosynthesis (fluridone, naproxen, and tungstate), ABA-deficient tomato mutants (notabilis, flacca, and sitiens), and quantification of xanthophylls indicate that ABA biosynthesis is influenced, probably through stimulated cleavage of xanthophylls to xanthoxal in shoot tissue. (+info)Tungsten compounds refer to chemical substances formed by the combination of tungsten (W, atomic number 74) with other elements, often exhibiting high density, strength, and heat resistance, and utilized in various industries including electronics, metallurgy, and medical applications.
Tungsten compounds refer to chemical substances that contain tungsten (W, atomic number 74) in its ionic or molecular form. Tungsten is a heavy metal and exists in several oxidation states, most commonly +6, +4, and +2. Tungsten compounds have various applications in industrial, medical, and technological fields.
Examples of tungsten compounds include:
* Tungstic acid (WO3·2H2O)
* Sodium polytungstate (Na6WO6)
* Calcium tungstate (CaWO4)
* Tungsten carbide (WC)
* Tungsten hexafluoride (WF6)
Tungsten compounds have been used in medical imaging, such as X-ray machines and CT scanners, due to their high density and ability to absorb X-rays. They are also used in the production of surgical instruments, dental alloys, and other medical devices. However, some tungsten compounds can be toxic or carcinogenic, so proper handling and disposal are essential.
Tungsten does not have a specific medical definition as it is not a biological or clinical concept used in medicine; however, it is an chemical element (symbol W, atomic number 74) with high density and melting point, which has been used in various medical applications such as in the production of some surgical instruments and devices.
I'm sorry for any confusion, but 'Tungsten' is not a medical term. It is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth, and it has many industrial uses due to its hardness, high density, and high melting point.
In the context of medicine or healthcare, tungsten may be encountered in certain medical devices, such as X-ray tubes and electrodes, where its properties are utilized for their durability and heat resistance. However, it is not a term that would typically have a formal medical definition.
Molybdenum, in the context of nutrition and health, is a trace essential mineral that serves as a co-factor for various enzymes involved in crucial physiological processes such as antioxidant defense, sulfur metabolism, and purine catabolism.
I'm sorry for any confusion, but "Molybdenum" is not a medical term. It is an element with the symbol Mo and atomic number 42 on the periodic table. Molybdenum is used in various industries, including medicine, for example in the production of surgical instruments and some prosthetics due to its strength and resistance to corrosion. However, it is not a term used to describe a medical condition or bodily process. If you have any questions related to elements and their uses in medicine, I'd be happy to help with those!
**I'm sorry for the confusion, but 'Nevada' is not a medical term.** It is a geographical location, specifically a state in the southwestern United States. If you have any medical terms or concepts you would like me to define or explain, please let me know!
I'm sorry for any confusion, but "Nevada" is not a medical term. It is the name of a state in the western United States. If you have any medical questions or terms you would like defined, please let me know and I would be happy to help.
Cobalt is a metallic element (Co, atomic number 27) that is not found free in nature, but as a minor component of various minerals, and is used in the production of alloys, batteries, and radiocontrast agents in medical imaging.
Cobalt is a chemical element with the symbol Co and atomic number 27. It is a hard, silver-white, lustrous, and brittle metal that is found naturally only in chemically combined form, except for small amounts found in meteorites. Cobalt is used primarily in the production of magnetic, wear-resistant, and high-strength alloys, as well as in the manufacture of batteries, magnets, and pigments.
In a medical context, cobalt is sometimes used in the form of cobalt-60, a radioactive isotope, for cancer treatment through radiation therapy. Cobalt-60 emits gamma rays that can be directed at tumors to destroy cancer cells. Additionally, small amounts of cobalt are present in some vitamin B12 supplements and fortified foods, as cobalt is an essential component of vitamin B12. However, exposure to high levels of cobalt can be harmful and may cause health effects such as allergic reactions, lung damage, heart problems, and neurological issues.
Aldehyde Oxidoreductases are a class of enzymes that catalyze the oxidation of aldehydes to carboxylic acids, using NAD+ or FAD as an electron acceptor.
Aldehyde oxidoreductases are a class of enzymes that catalyze the oxidation of aldehydes to carboxylic acids using NAD+ or FAD as cofactors. They play a crucial role in the detoxification of aldehydes generated from various metabolic processes, such as lipid peroxidation and alcohol metabolism. These enzymes are widely distributed in nature and have been identified in bacteria, yeast, plants, and animals.
The oxidation reaction catalyzed by aldehyde oxidoreductases involves the transfer of electrons from the aldehyde substrate to the cofactor, resulting in the formation of a carboxylic acid and reduced NAD+ or FAD. The enzymes are classified into several families based on their sequence similarity and cofactor specificity.
One of the most well-known members of this family is alcohol dehydrogenase (ADH), which catalyzes the oxidation of alcohols to aldehydes or ketones as part of the alcohol metabolism pathway. Another important member is aldehyde dehydrogenase (ALDH), which further oxidizes the aldehydes generated by ADH to carboxylic acids, thereby preventing the accumulation of toxic aldehydes in the body.
Deficiencies in ALDH enzymes have been linked to several human diseases, including alcoholism and certain types of cancer. Therefore, understanding the structure and function of aldehyde oxidoreductases is essential for developing new therapeutic strategies to treat these conditions.
Pterins are a group of aromatic, heterocyclic compounds that primarily function as cofactors or precursors in the biosynthesis of various molecules, including biopterin which plays a crucial role in neurotransmitter synthesis and immune responses.
Pterins are a group of naturally occurring pigments that are derived from purines. They are widely distributed in various organisms, including bacteria, fungi, and animals. In humans, pterins are primarily found in the eye, skin, and hair. Some pterins have been found to play important roles as cofactors in enzymatic reactions and as electron carriers in metabolic pathways.
Abnormal levels of certain pterins can be indicative of genetic disorders or other medical conditions. For example, an excess of biopterin, a type of pterin, is associated with phenylketonuria (PKU), a genetic disorder that affects the body's ability to metabolize the amino acid phenylalanine. Similarly, low levels of neopterin, another type of pterin, can be indicative of immune system dysfunction or certain types of cancer.
Medical professionals may measure pterin levels in blood, urine, or other bodily fluids to help diagnose and monitor these conditions.
Tungsten borides
... are compounds of tungsten and boron. Their most remarkable property is high hardness. The Vickers hardness of ... Mohammadi, R.; Lech, A. T.; Xie, M.; Weaver, B. E.; Yeung, M. T.; Tolbert, S. H.; Kaner, R. B. (2011). "Tungsten tetraboride, ... Woods, H. P.; Wawner, F. E.; Fox, B. G. (1966). "Tungsten Diboride: Preparation and Structure". Science. 151 (3706): 75. ... and WB4 crystals can be grown by arc-melting a mixture of elemental tungsten and boron. WB2 has the same hexagonal structure as ...
Radium tungstate
... is an inorganic compound of radium, oxygen, and tungsten with the chemical formula RaWO4. This is a salt of ... Benesovsky, Friedrich (1980). Tungsten: The compounds. sect. 1. Systems with noble gases, hydrogen, and oxygen (in German). ... The compound forms a white solid, slightly soluble in water. It is poorly known due to the high radioactivity of radium. ...
Tungsten
Erik Lassner, Wolf-Dieter Schubert, Eberhard Lüderitz, Hans Uwe Wolf, "Tungsten, Tungsten Alloys, and Tungsten Compounds" in ... Tungsten compounds are often used as industrial catalysts. Tungsten is the only metal in the third transition series that is ... ISBN 978-0-8247-0765-1. Masten, Scott (2003). "Tungsten and Selected Tungsten Compounds - Review of Toxicological Literature" ( ... Because of tungsten's high melting point, it is not commercially feasible to cast tungsten ingots. Instead, powdered tungsten ...
Hexa(tert-butoxy)ditungsten(III)
Chisholm, M. H.; Extine, M. (1975). "New Metalloorganic Compounds of Tungsten(III)". Journal of the American Chemical Society. ... Hexa(tert-butoxy)ditungsten(III) is a coordination complex of tungsten(III). It is one of the homoleptic alkoxides of tungsten ...
Paratungstate
"Tungsten, Tungsten Alloys, and Tungsten Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi: ... is a key intermediate in the purification of tungsten from its ores. The salt (NH4)10(W12O42)·4H2O has been characterized by X- ...
Tungsten dichloride dioxide
It is used as a precursor to other tungsten compounds. Like other tungsten halides, WO2Cl2 is sensitive to moisture, undergoing ... Tungsten compounds, Oxychlorides, All stub articles, Inorganic compound stubs). ... Tungsten dichloride dioxide, or Tungstyl chloride is the chemical compound with the formula WO2Cl2. It is a yellow-colored ... Gaseous tungsten dichloride dioxide is a monomer. Solid tungsten dichloride dioxide is a polymer consisting of distorted ...
Molybdenum bronze
Sodium tungsten bronze - Chemical intercalation compound Onoda, M.; Toriumi, K.; Matsuda, Y.; Sato, M. (1987). "Crystal ... Molybdenum compounds, Non-stoichiometric compounds, Transition metal oxides). ... These compounds form deeply coloured plate-like crystals with a metallic sheen, hence their name. These bronzes derive their ... These compounds have been much studied since the 1980s due to their markedly anisotropic electrical properties, reflecting ...
Sodium tungsten bronze
... is a form of insertion compound with the formula NaxWO3, where x is equal to or less than 1. So named ... The sodium in this compound can be replaced by other alkali metals to form their tungsten bronzes, and by other metals such as ... Tungsten bronzes owe some of their properties to the relative stability of the tungsten(V) cation that is formed. A similar ... Sodium tungsten bronze, like other tungsten bronzes, is resistant to chemical reaction under both acidic and basic conditions. ...
Tungsten hexachloride
... is an inorganic chemical compound of tungsten and chlorine with the chemical formula WCl6. This dark ... Tungsten hexachloride can be prepared by chlorinating tungsten metal in a sealed tube at 600 °C: W + 3 Cl2 → WCl6 Tungsten ... It is an important starting reagent in the preparation of tungsten compounds. Other examples of charge-neutral hexachlorides ... The highly volatile tungsten hexafluoride is also known. As a d0 atom, tungsten hexachloride is diamagnetic. ...
Tungsten oxytetrafluoride
The compound is one of many oxides of tungsten. It is usually encountered as product of the partial hydrolysis of tungsten ... Tungsten compounds, Oxyfluorides, All stub articles, Inorganic compound stubs). ... Tungsten oxytetrafluoride is an inorganic compound with the formula WOF4. It is a colorless diamagnetic solid. ... It can form complexes with acetonitrile and other compounds. Tungsten(VI) oxytetrafluoride can be synthesized by the reaction ...
Organomolybdenum chemistry
Tungsten analogues of almost all organoMo compounds are known. Some notable examples include hexamethyltungsten and analogues ... The heavier group 6 elements molybdenum and tungsten form organometallic compounds similar to those in organochromium chemistry ... Tungsten and molybdenum neopentylidyne and some tungsten neopentylidene complexes". J. Am. Chem. Soc. 100 (21): 6774. doi: ... Schrock, R. (1982). "Metathesis of tungsten-tungsten triple bonds with acetylenes and nitriles to give alkylidyne and nitrido ...
Tungsten diselenide
... is an inorganic compound with the formula WSe2. The compound adopts a hexagonal crystalline structure ... The tungsten-selenium bond has a length of 0.2526 nm, and the distance between selenium atoms is 0.334 nm. It is a well studied ... The tungsten atoms are covalently bonded to six selenium ligands in a trigonal prismatic coordination sphere while each ... "Tungsten diselenide shows potential for ultrathin, flexible, semi-transparent solar cells". Gizmag.com. 11 March 2014. ...
Tungsten(IV) fluoride
Tungsten tetrafluoride is an inorganic compound with the formula WF4. This little studied solid has been invoked, together with ... as an intermediate in the chemical vapor deposition of tungsten films using tungsten hexafluoride. Tungsten tetrafluoride was ... Creighton, J. R. (1989). "Selectivity loss during tungsten chemical vapor deposition: The role of tungsten pentafluoride". ... compounds by treatment with fluorine and chlorine: WF4 + X2 → WF4X2 Upon heating, it disproportionates to WF6 and tungsten ...
Paul Hagenmuller
Bevan, D. J. M; Hagenmuller, P (1973). Non-stoichiometric compounds: tungsten bronzes, vanadium bronzes and related compounds. ... "nonstoichiometry in vanadium and tungsten bronzes, two-dimensional oxyhalogenides, borides, and silicides, magnetic spinels". ...
Semiconductor device fabrication
poisonous compounds, such as arsine, phosphine, tungsten hexafluoride and silane. highly reactive liquids, such as hydrogen ... in the insulating material and then depositing tungsten in them with a CVD technique using tungsten hexafluoride; this approach ... Silicon is almost always used, but various compound semiconductors are used for specialized applications. The fabrication ... using special plastic molding compound that may contain glass powder as filler to control thermal expansion) Baking ...
Skiving (metalworking)
The tools are typically made of tungsten carbide-based compounds. It requires a minimum material feed rate to cut successfully ...
Tungsten(II) chloride
... is the inorganic compound with the formula W6Cl12. It is a polymeric cluster compound. The material ... Tungsten(II) chloride is prepared by reduction of the hexachloride. Bismuth is a typical reductant: 6 WCl6 + 8 Bi → W6Cl12 + 8 ...
Tungsten(III) oxide
... (W2O3) is a compound of tungsten and oxygen. It has been reported (2006) as being grown as a thin film by ... Tungsten compounds, Sesquioxides, Transition metal oxides, All stub articles, Inorganic compound stubs). ... Some older literature refers to the compound W2O3 but as the atomic weight of tungsten was believed at the time to be 92 (i.e ... Tungsten(III) oxide is used in various types of infrared absorbing coatings and foils. Atomic Layer Deposition of Tungsten(III ...
Tungsten(III) chloride
... is the inorganic compound with the formula W6Cl18. It is a cluster compound. It is a brown solid, ... 3.0.CO;2-0. Thurston, J. H.; Kolesnichenko, V.; Messerle, L. (2014). "Trinuclear Tungsten Halide Clusters". Inorganic Syntheses ... obtainable by chlorination of tungsten(II) chloride. Featuring twelve doubly bridging chloride ligands, the cluster adopts a ... Synthesis and physicochemical properties of tungsten trichloride. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy 1983 ...
Tungsten(VI) oxytetrachloride
Tungsten compounds, All stub articles, Inorganic compound stubs). ... The compound is classified as an oxyhalide. WOCl4 is prepared from tungsten trioxide: WO3 + 2 SOCl2 → WOCl4 + 2 SO2 WCl6 + ( ... Tungsten(VI) oxytetrachloride is the inorganic compound with the formula WOCl4. This diamagnetic solid is used to prepare other ... complexes of tungsten. The red crystalline compound is soluble in nonpolar solvents but it reacts with alcohols and water and ...
Tungsten disilicide
Tungsten silicide (WSi2) is an inorganic compound, a silicide of tungsten. It is an electrically conductive ceramic material. ... Tungsten silicide is also used as a barrier layer between silicon and other metals, e.g. tungsten. Tungsten silicide is also of ... Tungsten silicide layers can be prepared by chemical vapor deposition, e.g. using monosilane or dichlorosilane with tungsten ... Tungsten silicide is a replacement for earlier tungsten films. ... Tungsten silicide can react violently with substances such as ...
Tungsten(V) chloride
... is an inorganic compound with the formula W2Cl10. This compound is analogous in many ways to the more ... The compound is isostructural with Nb2Cl10 and Mo2Cl10. The compound evaporates to give trigonal bipyramidal WCl5 monomers. "C& ... CCl3 The compound exists as a dimer, with a pair of octahedral tungsten(V) centres bridged by two chloride ligands. The W---W ... Tungsten halides, All stub articles, Inorganic compound stubs). ... The compound is oxophilic and is highly reactive toward Lewis ...
Tungsten(VI) oxytetrabromide
Tungsten compounds, Oxobromides, All stub articles, Inorganic compound stubs). ... Tungsten(VI) oxytetrabromide is the inorganic compound with the formula WOBr4. This a red-brown, hygroscopic solid sublimes at ... The related tungsten(VI) oxytetrachloride has been more heavily studied. The compound is usually classified as an oxyhalide. ... "ChemIDplus - 0013520779 - KKUANYDOAOHBGB-UHFFFAOYSA-J - Tungsten tetrabromide monoxide - Similar structures search, synonyms, ...
Tungsten pentafluoride
Tungsten(V) fluoride is an inorganic compound with the formula WF5. It is a hygroscopic yellow solid. Like most pentafluorides ... Tungsten(V) fluoride is produced by the reaction of tungsten and tungsten hexafluoride: W + 5 WF6 → 6 WF5 At room temperature, ... Tungsten halides, Fluorides, All stub articles, Inorganic compound stubs). ... it disproportionates to the tetra- and hexafluoride: 2 WF5 → WF4 + WF6 Edwards, A. J. (1969). "Crystal Structure of tungsten ...
Tungsten(IV) oxide
Tungsten compounds, Transition metal oxides, All stub articles, Inorganic compound stubs). ... Tungsten(IV) oxide is the chemical compound with the formula WO2. The bronze-colored solid crystallizes in a monoclinic cell. ... WO2 is prepared by reduction of WO3 with tungsten powder over the course of 40 hours at 900 °C. An intermediate in this ... The rutile-like structure features distorted octahedral WO6 centers with alternate short W-W bonds (248 pm). Each tungsten ...
Tungsten(IV) chloride
... is an inorganic compound with the formula WCl4. It is a diamagnetic black solid. The compound is of ... It consists of linear chains of tungsten atoms each in octahedral geometry. Of six chloride ligands attached to each W center, ... The W-W separations are alternatingly bonding (2.688 Å) and nonbonding (3.787 Å). Reduction of tungsten(IV) chloride with ... Many reductants have been reported, including red phosphorus, tungsten hexacarbonyl, gallium, tin, and antimony. The latter is ...
Transition metal dichalcogenide monolayers
Tungsten diselenide is an inorganic compound with the formula WSe 2. The compound adopts a hexagonal crystalline structure ... Some elements, however, can only be used when extracted from solid compounds, such as sulfur from FeS2. The compound materials ... while each selenium is bonded to three tungsten atoms in a pyramidal geometry. The tungsten - selenium bond has a bond distance ... The compound has CdI 2 type structure and is an indirect band gap semiconducting material. The interlayer spacing between the ...
Sabyasachi Sarkar
Electron Transfer Mechanisms in Molybdenum and Tungsten Model Compounds". Molybdenum and Tungsten Enzymes. Metallobiology. pp. ... Sarkar, Sabyasachi; Das, Samar K. (August 1992). "CO2 fixation by [WIVO(S2C2(CN)2)2]2−: functional model for the tungsten- ... Das, Samar K.; Biswas, Dulali; Maiti, Rabindranath; Sarkar, Sabyasachi (14 February 1996). "Modeling the Tungsten Sites of ...
Copper-tungsten
Tungsten compounds, Metal matrix composites, Chip carriers). ... Copper-tungsten (tungsten-copper, CuW, or WCu) is a mixture of ... tungsten. An increase in tungsten leads to an increase in ultimate tensile strength up until the alloy reaches 80% tungsten and ... Commonly used copper tungsten mixtures contains 10-50 wt.% of copper, the remaining portion being mostly tungsten. The typical ... "Tungsten enhanced liner for a shaped charge". "Tungsten-Copper for SF6 circuit breakers". plansee.com. Retrieved 29 March 2019 ...
Tungsten(V) bromide
... is the precursor to other tungsten compounds by reduction reactions. For example, tungsten(IV) bromide can ... Tungsten(V) bromide is the inorganic compound with the empirical formula WBr5. The compound consists of bioctahedral structure ... Tungsten(V) bromide is prepared by treating tungsten powder with bromine in the temperature range 650-1000 °C. The product is ... Because it is relatively easy to reduce tungsten pentahalides, they can be used as alternative synthetic routes to tungsten (IV ...
Tungsten: What Are the Compounds Involving This Rare Element? - Feel Good Anyway
Tungsten as a metal has its own purpose. When combined with other elements, its versatility shines. Read on to learn more about ... Tungsten Compounds That You Need to Know. / Business / By Sarah Thompson / 3 minutes of reading ... Tungsten trioxide. This compound has a high melting point of 1472 °C. It is versatile enough that it can be applied to fabrics ... This is where tungsten carbide comes in. This chemical compound is considered the strongest material in the world. It just ...
Tungsten Compounds (definition)
Tungsten Compounds. J Comp Pathol 1988;98(3):375 cadmium tungsten oxide 7790-85-4 *Tungsten Compounds *Cadmium Compounds. Med ... Phosphorus Compounds *Tungsten Compounds. J Inorg Biochem 1997 Nov 1;68(2):93-9 polyoxometalate I 0 *Tungsten Compounds. ... Boron Compounds *Tungsten Compounds. Ann Pharm Fr 1990;48(1):42 polyoxotungstate PM 19 84303-06-0 *Polymers *Tungsten Compounds ... Tungsten Compounds *Lithium Compounds. Mol Biol (Mosk) 1980;14(1):190 Folins phenol reagent 0 *Molybdenum *Tungsten Compounds. ...
IARC Monographs evaluate the carcinogenicity of cobalt, antimony compounds, and weapons-grade tungsten alloy - IARC
WebElements Periodic Table » Tungsten » the essentials
This WebElements periodic table page contains the essentials for the element tungsten ... Tungsten: binary compounds. Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as ... Tungsten: compound properties. Bond strengths; lattice energies of tungsten halides, hydrides, oxides (where known); and ... The ground state electronic configuration of neutral tungsten is [Xe].4f14.5d4.6s2 and the term symbol of tungsten is 5D0. ...
 (n=2, 3) Clusters](data:image/png;base64,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)
Tungsten Oxychloride Compounds Containing [W6O6Cl12](n-) (n=2, 3) Clusters
Tungsten Compound O.W. Sniper Football Jig - Hybrid Black
IARC Publications Website - Cobalt, Antimony Compounds, and Weapons-grade Tungsten Alloy
Cobalt metal (without tungsten carbide) and some cobalt compounds. Table S4.6 Genetic and related effects of cobalt in non- ... Cobalt metal (without tungsten carbide) and some cobalt compounds. Table S1.3 Global production of cobalt from mining, by ... Cobalt metal (without tungsten carbide) and some cobalt compounds. Table S2.6 Epidemiological studies on cancer of other sites ... Cobalt metal (without tungsten carbide) and some cobalt compounds 1. Cobalt(II) sulfate heptahydrate: ToxCast/Tox21 assay ...
Beast Coast Tungsten Compound Open Water Sniper Jig | Omnia Fishing
... the Beast Coast Tungsten Compound Open Water Sniper Jig is a winner for offshore anglers who want a more compact, tungsten- ... With a tungsten compound head that is lead-free, anglers have a vastly improved feel of bottom structures and substrates in a ... Available in Three Sizes Tungsten Compound is Harder and More Compact Than Lead 2/0 BKK Hook Hand-Tied Skirt Double Barbed ... Built with insight from Smallmouth Crush owner, Travis Manson, the Beast Coast Tungsten Compound Open Water Sniper Jig has all ...
Tungsten borides - Wikipedia
Tungsten borides are compounds of tungsten and boron. Their most remarkable property is high hardness. The Vickers hardness of ... Mohammadi, R.; Lech, A. T.; Xie, M.; Weaver, B. E.; Yeung, M. T.; Tolbert, S. H.; Kaner, R. B. (2011). "Tungsten tetraboride, ... Woods, H. P.; Wawner, F. E.; Fox, B. G. (1966). "Tungsten Diboride: Preparation and Structure". Science. 151 (3706): 75. ... and WB4 crystals can be grown by arc-melting a mixture of elemental tungsten and boron. WB2 has the same hexagonal structure as ...
Easy Joint Select Sweep in Compound Tungsten 12.5kg - Hancocks Building
Buy Easy Joint Select Sweep in Compound Tungsten 12.5kg from hancocks today! For Additional information; visit our website or ... Easy Joint Select Sweep in Compound Tungsten 12.5kg. £33.30. (. £39.96. incl. VAT) ... Easy Joint Sweep in Compound Mushroom 12.5kg. £30.85(£37.02 incl. VAT) ... Easy Joint Select Sweep in Compound Carbon 12.5kg. May 27, 2022 ... Easy Joint Select Sweep in Compound Tungsten 12.5kg quantity. ...
Air Contaminants Update Project | NIOSH | CDC
Tungsten (insoluble compounds, as W). TWA 5 mg/m 3 ST 10 mg/m 3 ... Tungsten (soluble compounds, as W). TWA 1 mg/m 3 ST 3 mg/m 3 ... Nickel metal & other compounds (as Ni). Metal & insoluble compounds: TWA 1 mg/m3 Soluble compounds: TWA 0.1 mg/m3 ... Manganese compounds and fume (as Mn). Compounds:. C 5 mg/m 3 Fume:. TWA 1 mg/m 3 ST 3 mg/m 3 ... Mercury compounds, as Hg [except(organo) alkyls]. Hg Vapor: TWA 0.05 mg/m3 [skin] Non-alkyl compounds: C 0.1 mg/m3 [skin] ...
Protein measurement with the Folin phenol reagent
Tungsten | Toxic Substances | Toxic Substance Portal | ATSDR
Tungsten is also used as a catalyst to speed up chemical reactions. Chemical compounds of tungsten are used for many purposes. ... Other tungsten compounds are used in ceramic pigments, as fire retardant coatings for fabrics, and as color-resistant dyes for ... Tungsten alloys tend to be strong and flexible, resist wear, and conduct electricity well. Tungsten is used in products such as ... Elemental tungsten is a white to steel gray metal (depending on the purity) that can be used in pure form or mixed with other ...
WikiGenes - TUNGSTEN - tungsten
Chemical compound and disease context of tungsten. *Treatment of rats with tungsten, an inhibitor of xanthine oxidase, before ... Associations of tungsten with other chemical compounds. *AOR consists of two identical subunits, each containing an Fe4S4 ... Molybdenum and tungsten are found in biological systems in a mononuclear form in the active site of a diverse group of enzymes ... Gene context of tungsten. *The CRMP1 and EVC genes are located near WFS1, the Wolfram syndrome type 1 gene, in which mutations ...
WebElements Periodic Table » Tungsten » tungsten hexachloride
This WebElements periodic table page contains tungsten hexachloride for the element tungsten ... The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the ... J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992. ...
Extremely durable biofouling-resistant metallic surfaces based on electrodeposited nanoporous tungstite films on steel | Nature...
Here we report a new route to form anti-fouling steel surfaces by electrodeposition of nanoporous tungsten oxide (TO) films. TO ... Dickens, P. G. & Whittingham, M. S. The tungsten bronzes and related compounds. Q. Rev. Chem. Soc. 22, 30-44 (1968) . ... Tungsten oxide thin films grown by thermal evaporation with high resistance to leaching. J. Braz. Chem. Soc. 25, 822-830 (2014 ... In particular, tungsten oxides (TO) have been studied extensively in the last few decades due to their unique electro- and ...
NIOSHTIC-2 Search Results - Full View
Nanotechnology; Particulates; Cytotoxicity; Tungsten-compounds; Tungsten-minerals; Signaling-systems. CODEN. FAJOEC ... Tungsten Carbide-Cobalt (WC-Co) nanoparticle composites have wide applications because of their hardness and toughness. In this ... Role of ROS generation in tungsten carbide-cobalt nanoparticles induced apoptosis in JB6 cells. ...
Advanced Search Results - Public Health Image Library(PHIL)
CPC Scheme - C10G CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION,...
in combination with chromium, molybdenum, tungsten metals or compounds thereof} [2013-01] ... with oxygen-generating compounds, e.g. per-compounds, chromic acid, chromates (plumbites or plumbates C10G 19/06) [2013-01] ... in combination with chromium, molybdenum, or tungsten metals, or compounds thereof [2013-01] ... in combination with chromium, molybdenum or tungsten metals, or compounds thereof [2013-01] ...
Peter Jutzi's research works | Bielefeld University, Bielefeld and other places
Different Reactivities of Divalent Silicon Compounds Towards Metallocene Derivatives of Molybdenum and Tungsten ... Introduction Compounds Containing Cyclopentadienyl‐Silicon σ ‐Bonds Compounds Containing Cyclopentadienyl-Silicon π ‐Bonds ... Benzene derivatives containing dimethylgallyl substituents in 1,3- (compounds 5 and 6), 1,4- (compound 9), and 1,3,5-position ( ... Thus, the compounds Me5C5Ga 1 and Me4EtC5Ga 2 have been prepared in high yields. Performing the synthesis of GaI under ...
ICSC 1319 - TITANIUM CARBIDE
CN205158983U - Line tension automatic control device is received to high -speed wire drawing enamelling machine -...
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Graphene - Mechanical exfoliation WS2 on sapphire substrate
Low work function, stable thin films (Patent) | DOE Patents
Gaseous compounds of tungsten and silicon are decomposed on a hot substrate to deposit a thin-film of tungsten-silicide. The ... Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low work function can ... Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low work function can ... abstractNote = {Generation of low work function, stable compound thin films by laser ablation. Compound thin films with low ...
WS2 powder physical properties and preparation
Tungsten disulfide is an inorganic compound with the formula WS2 and molecular weight 247.97. Gray with the metallic luster of ... Tungsten disulfide is a compound of tungsten and sulfur, chemical formula WS2, molecular weight 247.97, the state of black gray ... Tungsten disulfide is an inorganic compound with the formula WS2 and molecular weight 247.97.. Gray with the metallic luster of ... 2. Tungsten reacts very slowly with liquid sulfur.WS2 can be formed by sulfur-passing vapor from red-hot tungsten.WS2 can be ...
KR100955838B1 - Semiconductor device and method for forming metal line in the same - Google Patents
WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6 ... HQVNEWCFYHHQES-UHFFFAOYSA-N Silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 ... MZLGASXMSKOWSE-UHFFFAOYSA-N Tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1 ... NRTOMJZYCJJWKI-UHFFFAOYSA-N titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1 ...
DisulfideOxideCobaltInorganic compoundMolybdenum and tungstenWolframAlloysAntimony compoundsPolished tungsten carbidePurityCarbonDiborideAtomsBody-centrPOWDERTrioxideSteel-gray to tin-whiteBinaryHexachlorideOrganic compoundsNickelMelting PointSolubleDensityPigmentsElementalResidueMetalsExtensivelyLigandFilamentsBoronLubricantThermalChemical reactionsPropertiesHalogensCorrosionFaustoChemistryMoleculeMetal
Disulfide11
- Tungsten disulfide. (feelgoodanyway.com)
- Tungsten disulfide is an inorganic compound with the formula WS2 and molecular weight 247.97. (mis-asia.com)
- Tungsten disulfide is a compound of tungsten and sulfur, chemical formula WS2, molecular weight 247.97, the state of black gray powder, as dark gray hexane crystalline is solid. (mis-asia.com)
- In a dry pure nitrogen stream, the mixture of tungsten trisulfide and sulfur is co-headed to 900℃ to sublimate the excess sulfur, and the residue is tungsten disulfide. (mis-asia.com)
- The ammonium tungstate was then reacted with hydrogen sulfide gas to produce ammonium tetrathiotungstate, which was decomposed into tungsten disulfide after roasting at a high temperature. (mis-asia.com)
- The preparation method of ultrafine scaly crystal tungsten disulfide used for lubricant has simple equipment, no pollution to the environment, safe and reliable operation, and can produce high purity ultrafine tungsten disulfide with stable quality and hexagonal crystal structure. (mis-asia.com)
- Tungsten Disulfide (WS2) is dry/solid lubricant powder and is one of the most lubricious substances in the world. (mis-asia.com)
- A femtosecond laser is used to alter the morphology, stoichiometry and chemistry of the tungsten disulfide (WS2) and molybdenum disulfide (MoS2) starting materials. (uwaterloo.ca)
- properties of the oil, because in looking it up, I found this out about Tungsten: "Tungsten chemical compounds are used in catalysts, inorganic pigments, and tungsten disulfide high-temperature lubricants which is stable to 500 °C (930 °F)". Any one else heard of this or ever used oil with this in it? (bobistheoilguy.com)
- Vilan, don't confuse tungsten with tungsten disulfide, which is the compound being discussed here. (bobistheoilguy.com)
- The melting point of tungsten has nothing to do with the material properties of tungsten disulfide. (bobistheoilguy.com)
Oxide7
- This volume of the IARC Monographs provides evaluations of the carcinogenicity of nine agents: cobalt metal (without tungsten carbide or other metal alloys), soluble cobalt(II) salts, cobalt(II) oxide, cobalt(II,III) oxide, cobalt(II) sulfide, other cobalt(II) compounds, trivalent antimony, pentavalent antimony, and weapons-grade tungsten (with nickel and cobalt) alloy. (who.int)
- Cobalt(II,III) oxide, cobalt(II) sulfide, other cobalt(II) compounds, and pentavalent antimony were each evaluated as not classifiable as to its carcinogenicity to humans (Group 3) . (who.int)
- Here we report a new route to form anti-fouling steel surfaces by electrodeposition of nanoporous tungsten oxide (TO) films. (nature.com)
- Raman analyses indicated the presence of tungsten oxide, hydrated tungsten oxide compounds, and CoO and Co 3 O 4 formed on the alloy surfaces during the corrosion process. (hindawi.com)
- This resulted in a novel synthesis method for creating two dimensional (2D) tungsten semi-carbide (W2C) through carburizing WS2 and synthesizing plasmonic substoichiometric molybdenum oxide (MoO3-x) through the partial oxidation of MoS2. (uwaterloo.ca)
- In this letter, the formation of W 18 O 49 (= WO 2.72 ) and the effect of the laser power, the wavelength on the morphology and structural properties of tungsten oxide nano-structured and thin films are reported. (springer.com)
- When the electron gun's cathode of barium oxide coated Tungsten is warmed to around 1000°C, electrons are released and become free flying. (lu.se)
Cobalt7
- Weapons-grade tungsten (with nickel and cobalt) alloy is used in armour-penetrating munitions. (who.int)
- Tungsten, cobalt, and their compounds. (cdc.gov)
- Role of ROS generation in tungsten carbide-cobalt nanoparticle s induced apoptosis in JB6 cells. (cdc.gov)
- Tungsten Carbide-Cobalt (WC-Co) nanoparticle composites have wide applications because of their hardness and toughness. (cdc.gov)
- The substance is usually used in combination with other compounds such as tungsten carbide, cobalt. (ilo.org)
- They consist of the mixtures of one or more finely divided hard carbides particles, such as tungsten, titanium, tantalum, and vanadium, embedded in a matrix of soft and ductile binding materials such as cobalt, iron, or nickel. (hindawi.com)
- Valve ball and seat: stainless steel (A1), cobalt chromium (B2), tungsten carbide (C1), nickel and carbon compounds (C2), titanium carbide (C3). (phrmg.org)
Inorganic compound2
- Purity: 99%Particle Size : 5-10um About Tungsten Silicide WSi2 Powder : Tungsten silicide (WSi2) A silicide is an inorganic compound made of tungsten. (mis-asia.com)
- Sodium silicate Water glass is an inorganic compound with the chemical formula sodium silicate Na2SiO3. (metropolis1927.com)
Molybdenum and tungsten2
- The distribution of arsenic, molybdenum and tungsten in natural waters in basaltic terrain, N-Iceland. (cdc.gov)
- Molybdenum-boride (Mo2B), a compound derived from molybdenum and tungsten, is mostly used as a component of alloys containing both. (tfmpage.com)
Wolfram2
- On the periodic table, tungsten has the symbol W. This stands for wolfram, a word with Germanic origins. (feelgoodanyway.com)
- from the Swedish words " tung sten " meaning " heavy stone " (the origin of the symbol W is " wolfram ", named after the tungsten mineral wolframite ). (webelements.com)
Alloys3
- Small and large samples of tungsten wire like this, as well as foil, sheet, wire straight cut lengths, insulated wire, and mesh (and tungsten alloys in wire form), can be purchased from Advent Research Materials via their web catalogue. (webelements.com)
- Elemental tungsten is a white to steel gray metal (depending on the purity) that can be used in pure form or mixed with other metals to make alloys. (cdc.gov)
- Tungsten alloys tend to be strong and flexible, resist wear, and conduct electricity well. (cdc.gov)
Antimony compounds1
- Some pentavalent antimony compounds are used to treat leishmaniasis. (who.int)
Polished tungsten carbide2
- The main body of the band consists of polished tungsten carbide. (loveandlavender.com)
- Instead of an inlay, the brushed band is laid directly on top of the polished tungsten carbide. (loveandlavender.com)
Purity3
- About Metal Alloy 18.5g/cm3 Polished Tungsten Heavy Alloy Plate: Powder metallurgy produces compact ingots from high purity tungsten. (mis-asia.com)
- Purity>99% Particle size: 10-20um About Tungsten Boride WB2: Tungsten boride is a compound of tungsten and boron. (mis-asia.com)
- TRUNNANO is a reliable supplier of Metal Alloy High Purity Tungsten Crucibles. (robocup2009.org)
Carbon8
- Tungsten carbide is made from the chemical compound tungsten combined with carbon atoms. (loveandlavender.com)
- It is frequently alloyed with other metals, such as Casting Tungsten Carbide Powder is manufactured by melting Tungsten metal and Carbon together. (mis-asia.com)
- A variety of What is aluminum powder?Casting Tungsten Carbide Powder is manufactured by melting Tungsten metal and Carbon together. (mis-asia.com)
- Carbide powders are binary compounds formed from carbon (except hydrogen) with less or similar electronegativity. (actionext.com)
- Tungsten carbide, a mixture of tungsten (and carbon), is an organic compound. (actionext.com)
- Cementite can be described as a metal compound made of iron, carbon and has the chemical formula Fe3C. (actionext.com)
- Manganese carbonide is a stable, manganese-carbon-based compound. (actionext.com)
- Incandescent light sources, including older versions with tungsten and carbon filaments, as well as the newer, more advanced tungsten-halogen lamps, have been successfully employed as a highly reliable light source in optical microscopy for many decades and continue to be the one of the illumination mechanisms of choice for a variety of imaging modalities. (fsu.edu)
Diboride1
- The Vickers hardness of WB or tungsten diboride WB2 crystals is ~20 GPa and that of WB4 is ~30 GPa for loads exceeding 3N. (mis-asia.com)
Atoms3
- Tungsten atoms have 74 electrons and the shell structure is 2.8.18.32.12.2. (webelements.com)
- The chemical formula identifies each constituent element by its chemical symbol and indicates the number of atoms of each element found in each discrete molecule of that compound. (niir.org)
- Protons that are accelerated in a linear accelerator are fired at a rotating disc made of Tungsten, where a certain number of Tungsten atoms are hit. (lu.se)
Body-centr1
- The solid state structure of tungsten is: bcc (body-centred cubic). (webelements.com)
POWDER11
- Because of that, tungsten cannot be cast, forged, or rolled like other metals but must be pressed into shape while in powder form and then sintered. (mis-asia.com)
- After powder metallurgy, a series further deformations are made and heat treatments are applied until the final products have been produ W-Ni - Cu alloy is used in the production of Tungsten alloy balls. (mis-asia.com)
- Tungsten Silicide is dark gray powder. (mis-asia.com)
- W Tungsten boride is a black powder, its physical properties are as follows: molecular formula WB2, with metal conductivity, soluble in aqua regia. (mis-asia.com)
- Unique induction plasma process can be more than 20 kinds of metal and ceramic materials into spherical powder, including tungsten, molybdenum, tantalum, niobium. (iberocruceros.com)
- 2. High-activity nano-tungsten powder can be used as an additive for raw material powder of high-performance high-density alloy (addition amount is from 10% to 20%) and a raw material additive for preparing W strips and W wires, and can also be used as raw material for high-performance alloy tungsten powder. (iberocruceros.com)
- 3 The nano-tungsten powder can be used as the raw material of nano-WC to prepare nano-crystalline cemented carbide. (iberocruceros.com)
- Due to the special pore structure of this nano-tungsten powder, it can be used as the raw material of tungsten powder for the W-Mn method of ceramic metallization coating. (iberocruceros.com)
- Damp reunion will affect W powder dispersion performance and using effects, therefore, spherical tungsten powder should be sealed in vacuum packing and stored in cool and dry room, the spherical tungsten powder can not be exposure to air. (iberocruceros.com)
- We have many different kinds of packing which depends on the spherical tungsten powder quantity. (iberocruceros.com)
- Spherical tungsten powder shipping:could be shipped out by sea , by air, by express?as soon as possible once payment receipt. (iberocruceros.com)
Trioxide2
- Tungsten trioxide. (feelgoodanyway.com)
- Tungsten trioxide is known as a 'smart material', because it exhibits excellent electrochromic, photochromic and gasochromic properties. (springer.com)
Steel-gray to tin-white1
- Pure tungsten is a steel-gray to tin-white metal. (webelements.com)
Binary1
- Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of tungsten where known. (webelements.com)
Hexachloride2
- The oxidation number of tungsten in tungsten hexachloride is 6 . (webelements.com)
- The table shows element percentages for WCl 6 (tungsten hexachloride). (webelements.com)
Organic compounds2
- Catalytic wet peroxide oxidation (CWPO) is emerging as an advanced oxidation process (AOP) of significant promise, which is mainly due to its efficiency for the decomposition of recalcitrant organic compounds in industrial and urban wastewaters and relatively low operating costs. (mdpi.com)
- Inorganic or organic compounds that contain arsenic. (bvsalud.org)
Nickel2
- Payment & Transport: Tungsten-nickel-copper/iron alloy is characterized by low thermal expansion, high density, radiation absorption and high thermal and electrical conductivity. (mis-asia.com)
- About High Density Tungsten Aloy Rod Grinding Surface: Tungsten-alloy rods are made primarily of tungsten alloyed with nickel, iron, or copper. (mis-asia.com)
Melting Point5
- Tungsten has a melting point of 3422 °C. This is important to note because this element is already being utilized for its effective heat transfer. (feelgoodanyway.com)
- This compound has a high melting point of 1472 °C. It is versatile enough that it can be applied to fabrics. (feelgoodanyway.com)
- Tungsten has the highest melting point and lowest vapour pressure of all metals, and at temperatures over 1650°C has the highest tensile strength. (webelements.com)
- Tungsten has a higher melting point than any other element, over 3000* C. But no car engine should get anywhere near that, so I imagine it has some other purpose. (bobistheoilguy.com)
- In contrast, tungsten has a melting point of approximately 3380 C and can be heated to almost this temperature within a glass envelope to generate light having a higher color temperature and life span than any of the previous materials used for lamp filaments. (fsu.edu)
Soluble2
- Physical properties vary depending upon the specific soluble tungsten compound. (nanowerk.com)
- One of my friends wrote to Castrol about 'liquid tungsten' (Undergrad Chem Student) and received a courteous reply that it was actually 'oil-soluble long chain tertiary alkyl primary amine tungstates' rather than liquid metallic tungsten. (bobistheoilguy.com)
Density2
- High Density Tungsten Alloy Metal Ball, 18g/cm3: Diameter: 1.0mm-150.0mm Surface: sintered or forged Application: Electrical instrumentation and industrial purposes are also widely used. (mis-asia.com)
- See density of Tungsten in hundreds of units of density measurement grouped by weight . (aqua-calc.com)
Pigments1
- Other tungsten compounds are used in ceramic pigments, as fire retardant coatings for fabrics, and as color-resistant dyes for fabrics. (cdc.gov)
Elemental1
- The Vickers hardness of WB or WB2 crystals is ~20 GPa and that of WB4 is ~30 GPa for loads exceeding 3 N. Single crystals of WB2−x, x = 0.07-0.17 (about 1 cm diameter, 6 cm length) were produced by the floating zone method, and WB4 crystals can be grown by arc-melting a mixture of elemental tungsten and boron. (wikipedia.org)
Residue1
- Over time, the lamp output diminishes as the residue of deposited tungsten on the inner envelope walls grows thicker and absorbs increasing amounts of the shorter visible wavelengths. (fsu.edu)
Metals2
- Metal compounds of transition metals are of particular interest because of their structural, spectral and chemical properties are often strongly dependant on the nature of the ligand structure. (nanoshel.com)
- Because these materials exhibit compatibility among their compounds, the possibility of clinical use of PC has been considered as an alternative to MTA 32 , once it shows compatible levels of some toxic metals. (bvsalud.org)
Extensively1
- Tungsten is used extensively in quartz glass melting furnaces, sapphire cristal growth furnaces, and rare earth smelting faiences. (robocup2009.org)
Ligand1
- The [WOCl 4 ] ⊖ ion forms a tetragonal pyramid with the oxygen ligand in axial position and a tungsten -oxygen distance of 168 pm. (degruyter.com)
Filaments2
- Older lamps equipped with tungsten wire filaments and filled with inert argon gas are frequently used in student microscopes for brightfield and phase contrast imaging, and these sources may be sufficiently bright enough for some applications requiring polarized light. (fsu.edu)
- The first commercial incandescent lamps equipped with tungsten filaments were introduced in the early 1900s. (fsu.edu)
Boron1
- Tungsten borides are compounds of tungsten and boron. (wikipedia.org)
Lubricant1
- This compound primarily functions as a dry lubricant. (feelgoodanyway.com)
Thermal3
- In the presence of ionic compounds, the thermal decomposi-tion of octacarbonyldicobalt, Co 2 (CO) 8 , in an inert solvent leads exclusively to ε-Co nanocubes. (researchgate.net)
- Improved mold surfaces virtually eliminate mold cont Tungsten alloy heavy plate has low thermal expansion. (mis-asia.com)
- Al SiC (alluminum silicon carbide) is a metallic-based thermal management compound made up of silicon carbide and aluminum. (actionext.com)
Chemical reactions1
- Tungsten is also used as a catalyst to speed up chemical reactions. (cdc.gov)
Properties3
- Some properties of these compounds are described. (researchgate.net)
- In this thesis, the photothermal properties of tungsten and molybdenum compounds are studied for prospective use in photothermal therapy cancer treatments. (uwaterloo.ca)
- I would hope that the properties of Tungsten Disulphide are orders of magnitude more inert. (bobistheoilguy.com)
Halogens2
- Tungsten silicide Fluorine, halogens, strong acids and oxidants all react violently. (mis-asia.com)
- Although lamps containing halogens represented a significant improvement over the plain tungsten bulbs they replaced, the new lamps featured a slight pinkish tinge that is characteristic of iodine vapor. (fsu.edu)
Corrosion1
- 2004. Corrosion of tungsten coils after peripheral vascular embolization therapy: Influence on outcome and tungsten load. (cdc.gov)
Fausto1
- Tungsten was discovered by Fausto and Juan Jose de Elhuyar in 1783 at Spain. (webelements.com)
Chemistry1
- That is the beauty of chemistry-compounds can be created by combining elements. (feelgoodanyway.com)
Molecule1
- Inorganic compounds that contain tungsten as an integral part of the molecule. (reference.md)
Metal4
- If anything can handle what is basically melting metal, that is tungsten. (feelgoodanyway.com)
- It is time to look at some of the compounds involving this rare metal. (feelgoodanyway.com)
- Tungsten carbide is a compound in which 2 elements are incorporated to form a new metal. (metropolis1927.com)
- Tungsten is a white to steel gray metal having a body-centered cubic crystalline structure. (aqua-calc.com)