Tungsten
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 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.
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.
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 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 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 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 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
Radium tungstate
Tungsten
Hexa(tert-butoxy)ditungsten(III)
Paratungstate
Tungsten dichloride dioxide
Molybdenum bronze
Sodium tungsten bronze
Tungsten hexachloride
Tungsten oxytetrafluoride
Organomolybdenum chemistry
Tungsten diselenide
Tungsten(IV) fluoride
Paul Hagenmuller
Semiconductor device fabrication
Skiving (metalworking)
Tungsten(II) chloride
Tungsten(III) oxide
Tungsten(III) chloride
Tungsten(VI) oxytetrachloride
Tungsten disilicide
Tungsten(V) chloride
Tungsten(VI) oxytetrabromide
Tungsten pentafluoride
Tungsten(IV) oxide
Tungsten(IV) chloride
Transition metal dichalcogenide monolayers
Sabyasachi Sarkar
Copper-tungsten
Tungsten(V) bromide
Tungsten: What Are the Compounds Involving This Rare Element? - Feel Good Anyway
Tungsten Compounds (definition)
IARC Monographs evaluate the carcinogenicity of cobalt, antimony compounds, and weapons-grade tungsten alloy - IARC
WebElements Periodic Table » Tungsten » the essentials
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
Beast Coast Tungsten Compound Open Water Sniper Jig | Omnia Fishing
Tungsten borides - Wikipedia
Easy Joint Select Sweep in Compound Tungsten 12.5kg - Hancocks Building
Air Contaminants Update Project | NIOSH | CDC
Protein measurement with the Folin phenol reagent
Tungsten | Toxic Substances | Toxic Substance Portal | ATSDR
WikiGenes - TUNGSTEN - tungsten
WebElements Periodic Table » Tungsten » tungsten hexachloride
Extremely durable biofouling-resistant metallic surfaces based on electrodeposited nanoporous tungstite films on steel | Nature...
NIOSHTIC-2 Search Results - Full View
Advanced Search Results - Public Health Image Library(PHIL)
CPC Scheme - C10G CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION,...
Peter Jutzi's research works | Bielefeld University, Bielefeld and other places
ICSC 1319 - TITANIUM CARBIDE
CN205158983U - Line tension automatic control device is received to high -speed wire drawing enamelling machine -...
Browse Best Selling Products, Newest Products, shopyapps - best selling collection, Tronex at Micro-Tools
Graphene - Mechanical exfoliation WS2 on sapphire substrate
Low work function, stable thin films (Patent) | DOE Patents
WS2 powder physical properties and preparation
KR100955838B1 - Semiconductor device and method for forming metal line in the same - Google Patents
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)