:* Benzene, toluene and xylenes, as a whole referred to as BTX and primarily obtained from petroleum refineries by extraction from the reformate produced in catalytic reformers.

Benzene orbitals, cropped and translated from: de: Bild: Benzol. png, original by User: Sansculotte

Benzene is one of the best-known aromatic compounds as it is one of the simplest and most stable aromatics.

Benzene, one of the simplest aromatic hydrocarbons, for example, is excited at 254 nm and emits at 300 nm.

The clock, which was known for a time as " Big Benzene ", is one of the biggest in London.

Benzene has three aromatic π → π < sup >*</ sup > transitions ; two E-bands at 180 and 200 nm and one B-band at 255 nm with extinction coefficients respectively 60, 000, 8, 000 and 215.

Benzene, the most widely recognized aromatic compound with six ( 4n + 2, n = 1 ) delocalized electrons.

Benzene itself will normally undergo substitutions by electrophiles, but additional substituents can alter the reaction rate or products by electronically or sterically affecting the interaction of the two reactants.

Benzene is a raw material for dyes and synthetic detergents, and benzene and toluene for isocyanates MDI and TDI used in making polyurethanes.

Benzene in particular is a known high-risk carcinogen, so benzene content is typically specified in the MSDS when it is present in the mixture due to the specifics of the feedstock and distilling process used.

He launched the Benzene Action Plan in 2007 which monitors benzene emissions and aims to reduce concentrations in the air.

Sulfonation of Benzene to benzene sulfonic acid

Benzene, C < sub > 6 </ sub > H < sub > 6 </ sub >, is the simplest aromatic hydrocarbon and was recognized as the first aromatic hydrocarbon, with the nature of its bonding first being recognized by Friedrich August Kekulé von Stradonitz in the 19th century.

Benzene was the prototypic VOC used in the investigations for this research due to the similar properties it shares with many other VOCs.

Benzene, pyridine and furan can be represented respectively by the SMILES c1ccccc1, n1ccccc1 and o1cccc1.

Phenyl groups are often represented by the symbol Ph or, archaically, Φ. Benzene is sometimes denoted as PhH.

Benzene is a more stable molecule than would be expected without accounting for charge delocalization.

Benzene, as well as most other annulenes ( cyclodecapentaene excepted ) with the formula C < sub > n </ sub > H < sub > n </ sub > where n is an even number, such as cyclotetradecaheptaene.

Benzene and propylene are compressed together to a pressure of 30 standard atmospheres at 250 ° C ( 482 ° F ) in presence of a catalytic Lewis acid.

The Structure of Benzene was unraveled by Friedrich August Kekule ( 7 September 1829 – 13 July 1896 ) at Ghent.

Friedel-Crafts reaction | Benzene Friedel-Crafts alkylation.

Prominent contaminants include radionuclides, VOCs-volatile organic compounds, Chromium, Lead, Benzene, and other components of rocket engine fuel and cleaning compounds.

Benzene rings are common in organic compounds.

Benzene, with the delocalization of the electron s indicated by the circle.

File: Benzene bonds. svg | Benzene ( annulene )

Perrier's reputation for purity suffered a blow in 1990 when a laboratory in North Carolina in the United States found Benzene, a carcinogen, in several bottles.

Some drug treatments that have been used to control ataxia include: 5-hydroxytryptophan ( 5-HTP ), idebenone, amantadine, physostigmine, L-carnitine or derivatives, trimethoprim – sulfamethoxazole, vigabatrin, phosphatidylcholine, acetazolamide, 4-aminopyridine, buspirone, and a combination of coenzyme Q10 and vitamin E.

Both these words have similar meaning, and Young's Literal Translation renders them and their derivatives as “ age ” or “ age-during ”.

Tetrahydrocannabinol ( THC ) and some other cannabinoids, either from the Cannabis sativa plant or synthetic, have analgesic properties, although the use of cannabis derivatives is currently illegal in many countries.

Research has only rarely been conducted into the therapeutic potential of opioid derivatives for depression in the past sixty years, whereas amphetamines have found a thriving market for conditions as widely arrayed as attention deficit disorder, narcolepsy, and obesity, and continue to be studied for myriad applications.

These polar unit vectors can be expressed in terms of Cartesian unit vectors in the x and y directions, denoted i and j respectively :< ref > Note: unlike the Cartesian unit vectors i and j, which are constant, in polar coordinates the direction of the unit vectors u < sub > r </ sub > and u < sub > θ </ sub > depend on θ, and so in general have non-zero time derivatives .</ ref >

So assume ƒ is differentiable at 0, as a function of two real variables from Ω to C. This is equivalent to the existence of two complex numbers and ( which are the partial derivatives of ƒ ) such that we have the linear approximation

Carbides of the actinide elements, which have stoichiometry MC < sub > 2 </ sub > and M < sub > 2 </ sub > C < sub > 3 </ sub >, are also described as salt-like derivatives of C < sub > 2 </ sub >< sup > 2 –</ sup >.

African American dances are those dances which have developed within African American communities in everyday spaces, rather than in dance studios, schools or companies and its derivatives, tap dance, disco, jazz dance, swing dance, hip hop dance and breakdance.

Under US law and the laws of most other developed countries, derivatives have special legal exemptions that make them a particularly attractive legal form to extend credit.

Financial reforms within the US since the financial crisis have served only to reinforce special protections for derivatives, including greater access to government guarantees, while minimizing disclosure to broader financial markets.

One of the oldest derivatives is rice futures, which have been traded on the Dojima Rice Exchange since the eighteenth century.

A derivatives exchange is a market where individuals trade standardized contracts that have been defined by the exchange.

The Euler – Maclaurin formula provides expressions for the difference between the sum and the integral in terms of the higher derivatives ƒ < sup >( k )</ sup > at the end points of the interval m and n. Explicitly, for any natural number p, we have

An estimated 12 % of the English vocabulary has Greek origin, while numerous Greek words have English derivatives.

" Hate crime " generally refers to criminal acts that are seen to have been motivated by bias against one or more of the types above, or of their derivatives.

If a complex function = is holomorphic, then u and v have first partial derivatives with respect to x and y, and satisfy the Cauchy – Riemann equations:

A simple converse is that if u and v have continuous first partial derivatives and satisfy the Cauchy – Riemann equations, then ƒ is holomorphic.

A more satisfying converse, which is much harder to prove, is the Looman – Menchoff theorem: if ƒ is continuous, u and v have first partial derivatives ( but not necessarily continuous ), and they satisfy the Cauchy – Riemann equations, then ƒ is holomorphic.

Other political persecutions under bureaucratic parties have resulted in a strong historical antagonism between anarchists and libertarian Marxists on the one hand and Leninist Marxists and their derivatives such as Maoists on the other.

The MC68302 and its derivatives have been used in many telecom products from Cisco, 3com, Ascend, Marconi, Cyclades and others.

The rotation of morphine with chemically dissimilar opioids in the long-term treatment of pain will slow down the growth of tolerance in the longer run, particularly agents known to have significantly incomplete cross-tolerance with morphine such as levorphanol, ketobemidone, piritramide, and methadone and its derivatives ; all of these drugs also have NMDA antagonist properties.

As a result of the extensive study and use of this molecule, more than 200 morphine derivatives ( also counting codeine and related drugs ) have been developed since the last quarter of the 19th century.

Various tryptamine and phenethylamine / amphetamine derivatives such as αET, αMT, amphetamine ( itself ), methamphetamine, MDMA, 4-MTA, PMA, 2C-T-7, and 2C-T-21 may also have weak to strong MAOI effects at high doses.