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Influid mechanics,hydrostatic equilibrium, also calledhydrostatic balanceandhydrostasy, is the condition of afluidorplasticsolid at rest, which occurs when external forces, such asgravity, are balanced by apressure-gradient force.[1]In the planetary physics of Earth, the pressure-gradient force prevents gravity from co... | https://en.wikipedia.org/wiki/Hydrostatic_equilibrium |
In mathematics, themethod of steepest descentorsaddle-point methodis an extension ofLaplace's methodfor approximating an integral, where one deforms a contour integral in the complex plane to pass near a stationary point (saddle point), in roughly the direction of steepest descent or stationary phase. The saddle-point... | https://en.wikipedia.org/wiki/Saddle-point_method |
Inmathematics,Laplace's method, named afterPierre-Simon Laplace, is a technique used to approximateintegralsof the form
wheref{\displaystyle f}is a twice-differentiablefunction,M{\displaystyle M}is a largenumber, and the endpointsa{\displaystyle a}andb{\displaystyle b}could be infinite. This technique was originally p... | https://en.wikipedia.org/wiki/Laplace%27s_method |
Inmathematical analysis, themaximumandminimum[a]of afunctionare, respectively, the greatest and least value taken by the function. Known generically asextremum,[b]they may be defined either within a givenrange(thelocalorrelativeextrema) or on the entiredomain(theglobalorabsoluteextrema) of a function.[1][2][3]Pierre de... | https://en.wikipedia.org/wiki/Maximum_and_minimum |
In the study ofdynamical systems, ahyperbolic equilibrium pointorhyperbolic fixed pointis afixed pointthat does not have anycenter manifolds. Near ahyperbolicpoint the orbits of a two-dimensional,non-dissipativesystem resemble hyperbolas. This fails to hold in general.Strogatznotes that "hyperbolic is an unfortunate n... | https://en.wikipedia.org/wiki/Hyperbolic_equilibrium_point |
Inmathematics,hyperbolic geometry(also calledLobachevskian geometryorBolyai–Lobachevskiangeometry) is anon-Euclidean geometry. Theparallel postulateofEuclidean geometryis replaced with:
(Compare the above withPlayfair's axiom, the modern version ofEuclid'sparallel postulate.)
Thehyperbolic planeis aplanewhere every p... | https://en.wikipedia.org/wiki/Hyperbolic_geometry |
In the mathematical area ofgame theoryand ofconvex optimization, aminimax theoremis a theorem that claims that
under certain conditions on the setsX{\displaystyle X}andY{\displaystyle Y}and on the functionf{\displaystyle f}.[1]It is always true that the left-hand side is at most the right-hand side (max–min inequality... | https://en.wikipedia.org/wiki/Minimax_theorem |
In mathematics, themax–min inequalityis as follows:
When equality holds one says thatf,W, andZsatisfies a strong max–min property (or asaddle-pointproperty). The example functionf(z,w)=sin(z+w){\displaystyle \ f(z,w)=\sin(z+w)\ }illustrates that the equality does not hold for every function.
A theorem giving conditi... | https://en.wikipedia.org/wiki/Max%E2%80%93min_inequality |
Themountain pass theoremis anexistence theoremfrom thecalculus of variations, originally due toAntonio AmbrosettiandPaul Rabinowitz.[1][2]Given certain conditions on a function, the theorem demonstrates the existence of asaddle point. The theorem is unusual in that there are many other theorems regarding the existence... | https://en.wikipedia.org/wiki/Mountain_pass_theorem |
' The All-Species Living Tree' Project is a collaboration between various academic groups/institutes, such as ARB , SILVA rRNA database project, and LPSN , with the aim of assembling a database of 16S rRNA sequences of all validly published species of Bacteria and Archaea . [ 1 ] At one stage, 23S sequences were also c... | https://en.wikipedia.org/wiki/'The_All-Species_Living_Tree'_Project |
In quantum field theory , the ' t Hooft loop is a magnetic analogue of the Wilson loop whose spatial loop operator give rise to thin loops of magnetic flux associated with magnetic vortices . They play the role of a disorder parameter for the Higgs phase in pure gauge theory . Consistency conditions between electric an... | https://en.wikipedia.org/wiki/'t_Hooft_loop |
The ' t Hooft symbol is a collection of numbers which allows one to express the generators of the SU(2) Lie algebra in terms of the generators of Lorentz algebra. The symbol is a blend between the Kronecker delta and the Levi-Civita symbol . It was introduced by Gerard 't Hooft . It is used in the construction of the B... | https://en.wikipedia.org/wiki/'t_Hooft_symbol |
(2-Hydroxyethyl) dimethylsulfoxonium chloride is an organic compound with the formula [HOCH 2 CH 2 S(O)(CH 3 ) 2 ] + Cl − . It is a sulfonium ion with a chloride counterion. This salt has been isolated from sea chervils and sea sponges . It can cause a disease known as Dogger Bank itch . [ 1 ]
(2-Hydroxyethyl) dimet... | https://en.wikipedia.org/wiki/(2-Hydroxyethyl)_dimethylsulfoxonium_chloride |
(26375) 1999 DE 9 ( provisional designation 1999 DE 9 ) is a trans-Neptunian object and a possible dwarf planet. Light-curve-amplitude analysis shows only small deviations, suggesting (26375) 1999 DE 9 is a spheroid with small albedo spots. [ 4 ] Measurements by the Spitzer Space Telescope estimate that it is 461 ± 45 ... | https://en.wikipedia.org/wiki/(26375)_1999_DE9 |
(2 R ,3 R )-Hydroxybupropion , or simply ( R , R )-hydroxybupropion , is the major metabolite of the antidepressant , smoking cessation , and appetite suppressant medication bupropion . [ 3 ] [ 4 ] [ 1 ] [ 5 ] It is the (2 R ,3 R )- enantiomer of hydroxybupropion , which in humans occurs as a mixture of (2 R ,3 R )-hyd... | https://en.wikipedia.org/wiki/(2R,3R)-Hydroxybupropion |
(55636) 2002 TX 300 is a bright Kuiper belt object in the outer Solar System estimated to be about 286 kilometres (178 mi) in diameter. [ 4 ] It is a large member of the Haumea family that was discovered on 15 October 2002 by the Near-Earth Asteroid Tracking (NEAT) program. [ 1 ]
2002 TX 300 is a classical Kuiper belt... | https://en.wikipedia.org/wiki/(55636)_2002_TX300 |
(55637) 2002 UX 25 ( provisional designation 2002 UX 25 ) is a trans-Neptunian object that orbits the Sun in the Kuiper belt beyond Neptune . It briefly garnered scientific attention when it was found to have an unexpectedly low density of about 0.82 g/cm 3 . [ 12 ] It was discovered on 30 October 2002, by the Spacewat... | https://en.wikipedia.org/wiki/(55637)_2002_UX25 |
Gold(III) bromide is a dark-red to black crystalline solid. [ 3 ] [ 4 ] [ 5 ] It has the empirical formula AuBr 3 , but exists as a dimer with the molecular formula Au 2 Br 6 in which two gold atoms are bridged by two bromine atoms. [ 4 ] [ 5 ] [ 6 ] It is commonly referred to as gold(III) bromide, gold tribromide, and... | https://en.wikipedia.org/wiki/(AuBr3)2 |
(Bis(trifluoroacetoxy)iodo)benzene , C 6 H 5 I(OCOCF 3 ) 2 , is a hypervalent iodine compound used as a reagent in organic chemistry . It can be used to carry out the Hofmann rearrangement under acidic conditions. [ 1 ]
The syntheses of all aryl hypervalent iodine compounds start from iodobenzene . The compound can b... | https://en.wikipedia.org/wiki/(Bis(trifluoroacetoxy)iodo)benzene |
Polytetrafluoroethylene ( PTFE ) is a synthetic fluoropolymer of tetrafluoroethylene , and has numerous applications because it is chemically inert . [ 3 ] The commonly known brand name of PTFE-based composition is Teflon by Chemours , [ 4 ] a spin-off from DuPont , which originally invented the compound in 1938. [ 4 ]... | https://en.wikipedia.org/wiki/(C2F4)n |
18-Crown-6 is an organic compound with the formula [C 2 H 4 O] 6 and the IUPAC name of 1,4,7,10,13,16-hexaoxacyclooctadecane. It is a white, hygroscopic crystalline solid with a low melting point. [ 1 ] Like other crown ethers , 18-crown-6 functions as a ligand for some metal cations with a particular affinity for pot... | https://en.wikipedia.org/wiki/(C2H4O)6 |
Diethyl ether , or simply ether , is an organic compound with the chemical formula (CH 3 CH 2 ) 2 O , sometimes abbreviated as Et 2 O . [ a ] It is a colourless, highly volatile , sweet-smelling ("ethereal odour"), extremely flammable liquid . It belongs to the ether class of organic compounds. It is a common solvent a... | https://en.wikipedia.org/wiki/(C2H5)2O |
Bipyridines are a family of organic compounds with the formula (C 5 H 4 N) 2 , consisting of two pyridyl (C 5 H 4 N) rings. Pyridine is an aromatic nitrogen-containing heterocycle. The bipyridines are all colourless solids, which are soluble in organic solvents and slightly soluble in water. Bipyridines, especially the... | https://en.wikipedia.org/wiki/(C5H4N)2 |
Anthracene is a solid polycyclic aromatic hydrocarbon (PAH) of formula C 14 H 10 , consisting of three fused benzene rings. It is a component of coal tar . Anthracene is used in the production of the red dye alizarin and other dyes, as a scintillator to detect high energy particles, as production of pharmaceutical drug... | https://en.wikipedia.org/wiki/(C6H4CH)2 |
Benzidine ( trivial name ), also called 1,1'- biphenyl -4,4'-diamine ( systematic name ), is an organic compound with the formula (C 6 H 4 NH 2 ) 2 . It is an aromatic amine . It is a component of a test for cyanide . Related derivatives are used in the production of dyes . Benzidine has been linked to bladder and ... | https://en.wikipedia.org/wiki/(C6H4NH2)2 |
Biphenyl (also known as diphenyl , phenylbenzene , 1,1′-biphenyl , lemonene [ 4 ] or BP ) is an organic compound that forms colorless crystals. Particularly in older literature, compounds containing the functional group consisting of biphenyl less one hydrogen (the site at which it is attached) may use the prefixes x... | https://en.wikipedia.org/wiki/(C6H5)2 |
Benzil (i.e. Bz 2 , systematically known as 1,2-diphenylethane-1,2-dione) is the organic compound with the formula ( C 6 H 5 CO ) 2 , generally abbreviated ( Ph CO) 2 . This yellow solid is one of the most common diketones . Its main use is as a photoinitiator in polymer chemistry . [ 4 ]
The compound's most noteworth... | https://en.wikipedia.org/wiki/(C6H5CO)2 |
Calcium benzoate refers to the calcium salt of benzoic acid . When used in the food industry as a preservative , its E number is E213 ( INS number 213); it is approved for use as a food additive in the EU, [ 1 ] USA and Australia and New Zealand. [ 2 ]
The formulas and structures of calcium carboxylate derivatives of ... | https://en.wikipedia.org/wiki/(C6H5COO)2Ca |
Magnesium benzoate is a chemical compound formed from magnesium and benzoic acid . It was once used to treat gout and arthritis . [ 1 ]
This article about an organic compound is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/(C6H5COO)2Mg |
Metol is a trade name for the organic compound with the formula [HOC 6 H 4 NH 2 (CH 3 )] 2 HSO 4 . It is the sulfate salt of N -methylaminophenol. This colourless salt is a popular photographic developer used in monochrome photography . [ 2 ]
Several methods exist for the preparation of N -methylaminophenol. It arises... | https://en.wikipedia.org/wiki/(C7H10NO)2SO4 |
Adiponitrile is an organic compound with the chemical formula (CH 2 ) 4 (CN) 2 . This viscous , colourless dinitrile is an important precursor to the polymer nylon 66 . In 2005, about one million tonnes of adiponitrile were produced. [ 4 ]
Because of the industrial value of adiponitrile, many methods have been develop... | https://en.wikipedia.org/wiki/(CH2)4(CN)2 |
Adipic acid or hexanedioic acid is the organic compound with the formula C 6 H 10 O 4 . [ 4 ] It a white crystalline powder at standard temperature and pressure. [ 4 ] From an industrial perspective, it is the most important dicarboxylic acid at about 2.5 billion kilograms produced annually, mainly as a precursor for t... | https://en.wikipedia.org/wiki/(CH2)4(CO2H)2 |
Allyl chloride is the organic compound with the formula C H 2 =CHCH 2 Cl . This colorless liquid is insoluble in water but soluble in common organic solvents. It is mainly converted to epichlorohydrin , used in the production of plastics. It is a chlorinated derivative of propylene . It is an alkylating agent , which ... | https://en.wikipedia.org/wiki/(CH2)CHCH2Cl |
Bis(chloromethyl) ether is an organic compound with the chemical formula (ClCH 2 ) 2 O. It is a colourless liquid with an unpleasant suffocating odour and it is one of the chloroalkyl ethers . Bis(chloromethyl) ether was once produced on a large scale, but was found to be highly carcinogenic and thus such production ha... | https://en.wikipedia.org/wiki/(CH2Cl)2O |
Cacodylic acid is an organoarsenic compound with the formula (CH 3 ) 2 As O 2 H. With the formula R 2 As(O)OH, it is the simplest of the arsinic acids . It is a colorless solid that is soluble in water.
Neutralization of cacodylic acid with base gives cacodylate salts, e.g. sodium cacodylate . They are potent herbicid... | https://en.wikipedia.org/wiki/(CH3)2AsO2H |
Acetone ( 2-propanone or dimethyl ketone ) is an organic compound with the formula (CH 3 ) 2 CO . [ 22 ] It is the simplest and smallest ketone ( R−C(=O)−R' ). It is a colorless, highly volatile , and flammable liquid with a characteristic pungent odor. [ 23 ]
Acetone is miscible with water and serves as an important... | https://en.wikipedia.org/wiki/(CH3)2C=O |
Isopropyl alcohol ( IUPAC name propan-2-ol and also called isopropanol or 2-propanol ) is a colorless , flammable , organic compound with a pungent alcoholic odor . [ 9 ]
Isopropyl alcohol, an organic polar molecule , is miscible in water , ethanol , and chloroform , demonstrating its ability to dissolve a wide range ... | https://en.wikipedia.org/wiki/(CH3)2CHOH |
Acetone ( 2-propanone or dimethyl ketone ) is an organic compound with the formula (CH 3 ) 2 CO . [ 22 ] It is the simplest and smallest ketone ( R−C(=O)−R' ). It is a colorless, highly volatile , and flammable liquid with a characteristic pungent odor. [ 23 ]
Acetone is miscible with water and serves as an important... | https://en.wikipedia.org/wiki/(CH3)2CO |
Dimethylmercury is an extremely toxic organomercury compound with the formula ( CH 3 ) 2 Hg . A volatile, flammable, dense and colorless liquid, dimethylmercury is one of the strongest known neurotoxins . Less than 0.1 mL is capable of inducing severe mercury poisoning resulting in death. [ 2 ]
The compound was one o... | https://en.wikipedia.org/wiki/(CH3)2Hg |
Dimethylglycine ( DMG ) is a derivative of the amino acid glycine with the structural formula (CH 3 ) 2 NCH 2 COOH. It can be found in beans and liver, and has a sweet taste. It can be formed from trimethylglycine upon the loss of one of its methyl groups . It is also a byproduct of the metabolism of choline .
When D... | https://en.wikipedia.org/wiki/(CH3)2NCH2COOH |
Dimethylamine is an organic compound with the formula (CH 3 ) 2 NH. This secondary amine is a colorless, flammable gas with an ammonia -like odor. Dimethylamine is commonly encountered commercially as a solution in water at concentrations up to around 40%. An estimated 270,000 tons were produced in 2005. [ 5 ]
The mol... | https://en.wikipedia.org/wiki/(CH3)2NH |
Dimethyl sulfide ( DMS ) or methylthiomethane is an organosulfur compound with the formula (CH 3 ) 2 S . It is the simplest thioether and has a characteristic disagreeable odor. It is a flammable liquid that boils at 37 °C (99 °F). It is a component of the smell produced from cooking of certain vegetables (notably maiz... | https://en.wikipedia.org/wiki/(CH3)2S |
Dimethyl sulfoxide ( DMSO ) is an organosulfur compound with the formula ( C H 3 ) 2 S = O . This colorless liquid is the sulfoxide most widely used commercially. It is an important polar aprotic solvent that dissolves both polar and nonpolar compounds and is miscible in a wide range of organic solvents as well as wate... | https://en.wikipedia.org/wiki/(CH3)2SO |
Dimethyl sulfone ( DMSO 2 ) is an organosulfur compound with the formula (CH 3 ) 2 SO 2 . It is also known by several other names including methyl sulfone and (especially in alternative medicine) methylsulfonylmethane ( MSM ). [ 4 ] This colorless solid features the sulfonyl functional group and is the simplest of the ... | https://en.wikipedia.org/wiki/(CH3)2SO2 |
sec -Butyllithium
tert -Butyllithium is a chemical compound with the formula (CH 3 ) 3 CLi. As an organolithium compound , it has applications in organic synthesis since it is a strong base , capable of deprotonating many carbon molecules, including benzene . tert -Butyllithium is available commercially as solutions i... | https://en.wikipedia.org/wiki/(CH3)3CLi |
n -Butanol Isobutanol
Nonafluoro-tert-butyl alcohol
tert -Butyl alcohol is the simplest tertiary alcohol , with a formula of (CH 3 ) 3 COH (sometimes represented as t -BuOH). Its isomers are 1-butanol , isobutanol , and butan-2-ol . tert -Butyl alcohol is a colorless solid, which melts near room temperature and has a... | https://en.wikipedia.org/wiki/(CH3)3COH |
Calcium acetate is a chemical compound which is a calcium salt of acetic acid . It has the formula Ca(C 2 H 3 O 2 ) 2 . Its standard name is calcium acetate, while calcium ethanoate is the systematic name. An older name is acetate of lime . The anhydrous form is very hygroscopic ; therefore the mono hydrate (Ca(CH 3 C... | https://en.wikipedia.org/wiki/(CH3COO)2Ca |
Undetermined (hydrate) [ 2 ]
Copper(II) acetate , also referred to as cupric acetate , is the chemical compound with the formula Cu(OAc) 2 where AcO − is acetate ( CH 3 CO − 2 ). The hydrated derivative, Cu 2 (OAc) 4 (H 2 O) 2 , which contains one molecule of water for each copper atom, is available commercially. Anhy... | https://en.wikipedia.org/wiki/(CH3COO)2Cu |
A carbonate is a salt of carbonic acid , ( H 2 CO 3 ), [ 2 ] characterized by the presence of the carbonate ion , a polyatomic ion with the formula CO 2− 3 . The word "carbonate" may also refer to a carbonate ester , an organic compound containing the carbonate group O=C(−O−) 2 .
The term is also used as a verb, to de... | https://en.wikipedia.org/wiki/(CO3)2- |
Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite is the high-temperature polymorph of CaMnSi 2 O 6 and johannsenite is the low temperature polymorph. The inversion takes place at 830... | https://en.wikipedia.org/wiki/(Ca,Mn)SiO3 |
Brockite is a rare earth phosphate mineral with formula: (Ca,Th,Ce)PO 4 ·H 2 O . It crystallizes in the hexagonal system in the chiral space group 180 or its enantiomorph 181. It is typically granular to massive with only rare occurrence of stubby crystals. It is radioactive due to the thorium content.
Brockite was fi... | https://en.wikipedia.org/wiki/(Ca,Th,Ce)PO4·H2O |
Betafite is a mineral group in the pyrochlore supergroup, with the chemical formula (Ca,U) 2 (Ti,Nb,Ta) 2 O 6 (OH) . Betafite typically occurs as a primary mineral in granite pegmatites , rarely in carbonatites . Originally defined by the B-site atom Ti, [ 5 ] the development of new nomenclature for mineral names [ 6 ]... | https://en.wikipedia.org/wiki/(Ca,U)2(Ti,Nb,Ta)2O6(OH) |
Dichlorodiphenyltrichloroethane , commonly known as DDT , is a colorless, tasteless, and almost odorless crystalline chemical compound, [ 5 ] an organochloride . Originally developed as an insecticide , it became infamous for its environmental impacts . DDT was first synthesized in 1874 by the Austrian chemist Othmar ... | https://en.wikipedia.org/wiki/(ClC6H4)2CHCCl3 |
Tetraamminecopper(II) sulfate monohydrate , or more precisely tetraammineaquacopper(II) sulfate , is the salt with the formula [ Cu ( N H 3 ) 4 ] S O 4 ·H 2 O , or more precisely [ Cu ( NH 3 ) 4 ( H 2 O )] SO 4 . This dark blue to purple solid is a sulfuric acid salt of the metal complex [Cu(NH 3 ) 4 (H 2 O)] 2+ (tetra... | https://en.wikipedia.org/wiki/(Cu(NH3)4)SO4 |
(Diacetoxyiodo)benzene , also known as phenyliodine (III) diacetate (PIDA) is a hypervalent iodine chemical with the formula C 6 H 5 I(OCOCH 3 ) 2 . It is used as an oxidizing agent in organic chemistry .
This reagent was originally prepared by Conrad Willgerodt [ 3 ] by reacting iodobenzene with a mixture of acetic a... | https://en.wikipedia.org/wiki/(Diacetoxyiodo)benzene |
( E )-4-Hydroxy-3-methyl-but-2-enyl pyrophosphate ( HMBPP or HMB-PP ) is an intermediate of the MEP pathway (non-mevalonate pathway) of isoprenoid biosynthesis. [ 1 ] [ 2 ] The enzyme HMB-PP synthase (GcpE, IspG) catalyzes the conversion of 2- C -methyl- D -erythritol 2,4-cyclodiphosphate (MEcPP) into HMB-PP. HMB-PP is... | https://en.wikipedia.org/wiki/(E)-4-Hydroxy-3-methyl-but-2-enyl_pyrophosphate |
( E )-Stilbene , commonly known as trans -stilbene , is an organic compound represented by the condensed structural formula C 6 H 5 CH=CHC 6 H 5 . Classified as a diarylethene , it features a central ethylene moiety with one phenyl group substituent on each end of the carbon–carbon double bond . It has an ( E ) stereo... | https://en.wikipedia.org/wiki/(E)-Stilbene |
Crotonaldehyde cis -3-Hexanal 2-Nonenal
( E , E )-2,4-Decadienal is an aromatic substance found in butter , cooked beef , fish , potato chips , roasted peanut , [ 2 ] buckwheat [ 3 ] and wheat bread crumb. [ 4 ] In an isolated state, it smells of deep fat flavor, characteristic of chicken aroma (at 10 ppm ). At lowe... | https://en.wikipedia.org/wiki/(E,E)-2,4-Decadienal |
The water dimer consists of two water molecules loosely bound by a hydrogen bond . It is the smallest water cluster . Because it is the simplest model system for studying hydrogen bonding in water, it has been the target of many theoretical [ 1 ] [ 2 ] [ 3 ] (and later experimental) studies that it has been called a "t... | https://en.wikipedia.org/wiki/(H2O)2 |
4,4′-Dihydroxybenzophenone is an organic compound with the formula (HOC 6 H 4 ) 2 CO. This off-white solid is a precursor to, or a degradation product of, diverse commercial materials. It is a potential endocrine disruptor . [ 1 ]
4,4′-Dihydroxybenzophenone is prepared by the rearrangement of p -hydroxyphenylbenzoate... | https://en.wikipedia.org/wiki/(HOC6H4)2CO |
Ferrous citrate , also known as iron(II) citrate or iron(2+) citrate, describes coordination complexes containing citrate anions with Fe 2+ formed in aqueous solution. Although a number of complexes are possible (or even likely), only one complex has been crystallized. That complex is the coordination polymer with th... | https://en.wikipedia.org/wiki/(HOOCCH2(OH)C(COOH)CH2COO)2Fe |
Antigorite is a lamellated, monoclinic mineral in the phyllosilicate serpentine subgroup with the ideal chemical formula of (Mg,Fe 2+ ) 3 Si 2 O 5 (OH) 4 . [ 2 ] It is the high-pressure polymorph of serpentine and is commonly found in metamorphosed serpentinites . Antigorite, and its serpentine polymorphs, play an impo... | https://en.wikipedia.org/wiki/(Mg,Fe)3Si2O5(OH)4 |
Bronzite is a member of the pyroxene group of minerals , belonging with enstatite and hypersthene to the orthorhombic series of the group. Rather than a distinct species, it is really a ferriferous variety of enstatite, which owing to partial alteration has acquired a bronze-like sub-metallic luster on the cleavage sur... | https://en.wikipedia.org/wiki/(Mg,Fe)SiO3 |
Antigorite is a lamellated, monoclinic mineral in the phyllosilicate serpentine subgroup with the ideal chemical formula of (Mg,Fe 2+ ) 3 Si 2 O 5 (OH) 4 . [ 2 ] It is the high-pressure polymorph of serpentine and is commonly found in metamorphosed serpentinites . Antigorite, and its serpentine polymorphs, play an impo... | https://en.wikipedia.org/wiki/(Mg,Fe2+)3Si2O5(OH)4 |
Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite is the high-temperature polymorph of CaMnSi 2 O 6 and johannsenite is the low temperature polymorph. The inversion takes place at 830... | https://en.wikipedia.org/wiki/(Mn,Ca,Fe)SiO3 |
Bixbyite is a manganese iron oxide mineral with chemical formula : (Mn,Fe) 2 O 3 . The iron/manganese ratio is quite variable and many specimens have almost no iron. It is a metallic dark black with a Mohs hardness of 6.0 – 6.5. [ 3 ] It is a somewhat rare mineral sought after by collectors as it typically forms euhedr... | https://en.wikipedia.org/wiki/(Mn,Fe)2O3 |
Brokenhillite is a rare mineral that is only found in the far-western regions of New South Wales in Broken Hill , Australia. Although it has been given a name and chemical formula, it has not been approved by the International Mineralogical Association primarily because it is a manganese silicate of the pyrosmalite gr... | https://en.wikipedia.org/wiki/(Mn,_Fe)8Si6O15(OH,Cl)10 |
Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged ( cationic ) molecular ion with the chemical formula NH + 4 or [NH 4 ] + . It is formed by the addition of a proton (a hydrogen nucleus) to ammonia ( NH 3 ). Ammonium is also a general name for positively charged (proton... | https://en.wikipedia.org/wiki/(NH4)+ |
Ammonium carbonate is a chemical compound with the chemical formula [ N H 4 ] 2 C O 3 . It is an ammonium salt of carbonic acid . It is composed of ammonium cations [NH 4 ] + and carbonate anions CO 2− 3 . Since ammonium carbonate readily degrades to gaseous ammonia and carbon dioxide upon heating, it is used as a leav... | https://en.wikipedia.org/wiki/(NH4)2CO3 |
Ceric ammonium nitrate (CAN) is the inorganic compound with the formula (NH 4 ) 2 [Ce(NO 3 ) 6 ] . This orange-red, water-soluble cerium salt is a specialised oxidizing agent in organic synthesis and a standard oxidant in quantitative analysis .
The anion [Ce(NO 3 ) 6 ] 2− is generated by dissolving Ce 2 O 3 in hot an... | https://en.wikipedia.org/wiki/(NH4)2Ce(NO3)6 |
Ammonium cerium(IV) sulfate is an inorganic compound with the formula (NH 4 ) 4 Ce(SO 4 ) 4 ·2H 2 O. It is an orange-colored solid. It is a strong oxidant, the potential for reduction is about +1.44V. Cerium(IV) sulfate is a related compound.
A crystallographic study shows that the compound contains the Ce 2 (SO 4 )... | https://en.wikipedia.org/wiki/(NH4)2Ce(SO4)3 |
Ammonium dichromate is an inorganic compound with the formula (NH 4 ) 2 Cr 2 O 7 . In this compound, as in all chromates and dichromates, chromium is in a +6 oxidation state , commonly known as hexavalent chromium . It is a salt consisting of ammonium ions and dichromate ions.
Ammonium dichromate is used in demonstrat... | https://en.wikipedia.org/wiki/(NH4)2Cr2O7 |
Ammonium chromate is a salt with the formula (NH 4 ) 2 CrO 4 . It forms yellow, monoclinic crystals; made from ammonium hydroxide and ammonium dichromate ; used in photography as a sensitizer for gelatin coatings. It is often used in photography, textile printing , and fixing chromate dyes on wool. It is also used as a... | https://en.wikipedia.org/wiki/(NH4)2CrO4 |
Diammonium phosphate ( DAP ; IUPAC name diammonium hydrogen phosphate ; chemical formula (NH 4 ) 2 (HPO 4 )) is one of a series of water - soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid .
Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the... | https://en.wikipedia.org/wiki/(NH4)2HPO4 |
Ammonium tetrathiomolybdate is the chemical compound with the formula (NH 4 ) 2 MoS 4 . This bright red ammonium salt is an important reagent in the chemistry of molybdenum and has been used as a building block in bioinorganic chemistry. The thiometallate (see metallate ) anion has the distinctive property of undergoin... | https://en.wikipedia.org/wiki/(NH4)2MoS4 |
Ammonium hydrosulfide is the chemical compound with the formula [NH 4 ]SH .
It is the salt derived from the ammonium cation and the hydrosulfide anion . The salt exists as colourless, water-soluble, micaceous crystals. On Earth the compound is encountered mainly as a solution, not as the solid, but [NH 4 ]SH ice is be... | https://en.wikipedia.org/wiki/(NH4)2S |
Ammonium persulfate (APS) is the inorganic compound with the formula (NH 4 ) 2 S 2 O 8 . It is a colourless (white) salt that is highly soluble in water, much more so than the related potassium salt . It is a strong oxidizing agent that is used as a catalyst in polymer chemistry , as an etchant , and as a cleaning and ... | https://en.wikipedia.org/wiki/(NH4)2S2O8 |
32.4g/100mL at 0 degrees Celsius [ 3 ]
60.4g/100mL at 100 degrees Celsius [ 3 ]
Ammonium sulfite is the ammonium salt of sulfurous acid with the chemical formula (NH 4 ) 2 SO 3 .
Ammonium sulfite can be prepared by the reaction of ammonia with sulfur dioxide in aqueous solution :
Ammonium sulfite is produced in gas... | https://en.wikipedia.org/wiki/(NH4)2SO3 |
Ammonium sulfate (American English and international scientific usage; ammonium sulphate in British English ); (NH 4 ) 2 SO 4 , is an inorganic salt with a number of commercial uses. The most common use is as a soil fertilizer. It contains 21% nitrogen and 24% sulfur .
The primary use of ammonium sulfate is as a ferti... | https://en.wikipedia.org/wiki/(NH4)2SO4 |
Ammonium phosphate is the inorganic compound with the formula (NH 4 ) 3 PO 4 . It is the ammonium salt of orthophosphoric acid. A related "double salt", (NH 4 ) 3 PO 4 . (NH 4 ) 2 HPO 4 is also recognized but is impractical to use. Both triammonium salts evolve ammonia. In contrast to the unstable nature of the triammo... | https://en.wikipedia.org/wiki/(NH4)3PO4 |
Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH 4 ) 6 Mo 7 O 24 , normally encountered as the tetrahydrate. A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate , although "ammonium molybdate" can also refer to a... | https://en.wikipedia.org/wiki/(NH4)6Mo7O24 |
Balliranoite (( Na , K ) 6 Ca 2 ( Si 6 Al 6 O 24 ) Cl 2 ( C O ) 3 ) is a mineral that was discovered at Monte Somma – Vesuvio volcanic complex, Campania, Italy . This mineral is named in honor of Paolo Ballirano (b. 1964), Italian crystallographer and professor in the Department of Earth Sciences, University of Rome ‘‘... | https://en.wikipedia.org/wiki/(Na,K)6Ca2(Si6Al6O24)Cl2(CO3) |
Levyne or levynite is a zeolite mineral, i.e. a hydrated silicate mineral . There are two forms of levyne:
Levyne crystallizes in the Trigonal - Hexagonal Scalenohedral class. It typically occurs as radiating clusters or fibrous masses that are transparent to translucent in colors ranging from white through reddish a... | https://en.wikipedia.org/wiki/(Na2,Ca,K2)Al2Si4O12·6(H2O) |
( R )-1-Aminoindane ( ( R )-1-AI ; developmental code name TVP-136 or TV-136 ), or ( R )-1-aminoindan , is the major metabolite of the selective MAO-B inhibitor and antiparkinsonian agent rasagiline (( R )- N -propargyl-1-aminoindane). [ 1 ] In contrast to rasagiline, it lacks significant monoamine oxidase inhibition .... | https://en.wikipedia.org/wiki/(R)-1-Aminoindane |
( R )-2-Methyl-CBS-oxazaborolidine is an organoboron catalyst that is used in organic synthesis . This catalyst , developed by Itsuno [ 1 ] [ 2 ] and Elias James Corey , [ 3 ] [ 4 ] [ 5 ] is generated by heating ( R )-(+)-2-(diphenylhydroxymethyl) pyrrolidine along with trimethylboroxine or methylboronic acid . It is a... | https://en.wikipedia.org/wiki/(R)-2-Methyl-CBS-oxazaborolidine |
( R )-3,4-Methylenedioxy- N -methylamphetamine ( ( R )-MDMA ), also known as ( R )-midomafetamine or as levo -MDMA , is the ( R )- or levorotatory ( l -) enantiomer of 3,4-methylenedioxy- N -methylamphetamine (MDMA; midomafetamine; "ecstasy"), a racemic mixture of ( R )-MDMA and ( S )-MDMA. [ 3 ] [ 2 ] Like MDMA, ( R )... | https://en.wikipedia.org/wiki/(R)-MDMA |
Bowieite is a rhodium - iridium - platinum sulfide mineral (Rh,Ir,Pt) 2 S 3 , found in platinum-alloy nuggets from Goodnews Bay, Alaska . [ 2 ] [ 3 ] [ 1 ] It was named (by the IMA in 1984) after the British scientist Stanley Bowie (1917–2008), in recognition of his work on identification of opaque minerals . [ 4 ]
Th... | https://en.wikipedia.org/wiki/(Rh,Ir,Pt)2S3 |
Brewsterite is the name of a series of tectosilicate minerals of the zeolite group. Prior to 1997, brewsterite was recognized as a mineral species, but a reclassification in 1997 by the International Mineralogical Association changed it to a series name, with the mineral species being named brewsterite-Sr and brewster... | https://en.wikipedia.org/wiki/(Sr,Ba)2Al4Si12O32·10H2O |
Béhierite is a very rare borate mineral , [ 2 ] and the tantalum endmember of a (Nb,Ta)BO 4 solid solution series formed with schiavinatoite , its niobium analogue. [ 4 ] [ 3 ]
Béhierite is also one of the most simple tantalum minerals. It contains simple tetrahedral borate anions , instead of more common among minera... | https://en.wikipedia.org/wiki/(Ta,Nb)BO4 |
The (U)SIM interface is the connecting point of the mobile phone and the UICC with its SIM or USIM application.
The UICC with the SIM or USIM application plays an important role in mobile telephony as it is the secure element identifying a subscriber in the network and allowing MNOs to bill the respective account. Hen... | https://en.wikipedia.org/wiki/(U)SIM_interface |
Uranyl hydroxide is a hydroxide of uranium with the chemical formula UO 2 (OH) 2 in the monomeric form and [(UO 2 ) 2 (OH) 4 ] 2- in the dimeric; both forms may exist in normal aqueous media. In aerobic conditions, up to 5 hydroxides can bind to uranyl ([(UO 2 ) 2 (OH) 5 ] 3- ). Uranyl hydroxide hydrate is precipitate... | https://en.wikipedia.org/wiki/(UO2)2(OH)4 |
( Z )-Stilbene is a diarylethene , that is, a hydrocarbon consisting of a cis ethene double bond substituted with a phenyl group on both carbon atoms of the double bond. The name stilbene was derived from the Greek word stilbos , which means shining.
Stilbene exists as two possible isomers known as ( E )-stilbene and ... | https://en.wikipedia.org/wiki/(Z)-Stilbene |
The (n-p) reaction , or (n,p) reaction , is an example of a nuclear reaction . It is the reaction which occurs when a neutron enters a nucleus and a proton leaves the nucleus simultaneously. [ 1 ]
For example, sulfur-32 ( 32 S) undergoes an (n,p) nuclear reaction when bombarded with neutrons , thus forming phosphorus-... | https://en.wikipedia.org/wiki/(n-p)_reaction |
+ h.c. is an abbreviation for " plus the H ermitian c onjugate "; it means that there are additional terms which are the Hermitian conjugates of all of the preceding terms, and is a convenient shorthand to omit half the terms actually present. [ 1 ] [ 2 ]
The notation convention "+ h.c." is common in quantum mechanics... | https://en.wikipedia.org/wiki/+_h.c. |
In organic chemistry , the phenyl group , or phenyl ring , is a cyclic group of atoms with the formula C6H5 , and is often represented by the symbol Ph (archaically φ ) or Ø . The phenyl group is closely related to benzene and can be viewed as a benzene ring, minus a hydrogen, which may be replaced by some other elemen... | https://en.wikipedia.org/wiki/-C6H5 |
In chemistry , cyanide (from Greek kyanos ' dark blue ' ) is an inorganic chemical compound that contains a C ≡ N functional group . This group, known as the cyano group , consists of a carbon atom triple-bonded to a nitrogen atom. [ 1 ]
Ionic cyanides contain the cyanide anion − C≡N . This anion is extremely poisonou... | https://en.wikipedia.org/wiki/-C≡N |
In chemistry , amines ( / ə ˈ m iː n , ˈ æ m iː n / , [ 1 ] [ 2 ] UK also / ˈ eɪ m iː n / [ 3 ] ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair . Formally, amines are derivatives of ammonia ( NH 3 in which the bond angle between the nitrogen and hydrogen is 107°), wherein one o... | https://en.wikipedia.org/wiki/-NH2 |
In chemistry , a selenosulfide refers to distinct classes of inorganic and organic compounds containing sulfur and selenium. The organic derivatives contain Se-S bonds, whereas the inorganic derivatives are more variable.
These species are classified as both organosulfur and organoselenium compounds. They are hybrid... | https://en.wikipedia.org/wiki/-SeS- |
In chemistry, the suffix -al is the IUPAC nomenclature used in organic chemistry to form names of aldehydes containing the -(CO)H group in the systematic form. It was extracted from the word "aldehyde". With the exception of chemical compounds having a higher priority than it, all aldehydes are named using -al, such as... | https://en.wikipedia.org/wiki/-al |
In organic chemistry , the suffix -ane forms the names of organic compounds where the −C−C− group (a carbon-carbon single bond ) has been attributed the highest priority according to the rules of organic nomenclature . Such organic compounds are called alkanes . They are saturated hydrocarbons .
The names of the satur... | https://en.wikipedia.org/wiki/-ane |
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