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...es, and as an [[asbestos]] substitute. The name is a shortened form of "[[aromatic]] [[polyamide]]". They are fibers in which the chain molecules are highly Aromatic polyamides were first introduced in commercial applications in the early 19

...improved solubility compared to starch and is easily cast into films from simple solvents. The degree of acetylation is easily controlled by transesterifica ...sser extent, cellulases to degrade the polysaccharides in order to produce simple sugars which serve as nutrients for these microorganisms. Brown-rot fungi s

...rbons in crude oil are mostly [[alkane]]s, [[cycloalkane]]s and various [[aromatic hydrocarbon]]s while the other organic compounds contain [[nitrogen]], [[ox |[[Aromatic]]s || 15% || 3 to 30%

...r class can have the oxygen atoms attached at various positions around the rings. ...condensation|Ullmann Ether Synthesis]] of 4R2E (''p''-diphenoxybenzene), a simple polyphenyl ether]]

| ImageFileR1 = Benzene-aromatic-3D-balls.png ...s|synthesized]] from other compounds present in petroleum. Benzene is an [[aromatic hydrocarbon]] and the second [''n'']-[[annulene]] ([6]-annulene), a cyclic

...carbon atoms via [[methine]] bridges (=CH-). Porphyrins are [[aromaticity|aromatic]]. That is, they obey [[Hückel's rule]] for aromaticity, possessing 4n+2 ...an isobacteriochlorin, depending on the relative positions of the reduced rings. Some porphyrin derivatives follow [[Hückel's rule]], but most do not.

...rings so the concentration of the [[EDTA]] complex, which has six chelate rings, is much higher than a corresponding complex with two monodentate nitrogen ...d) has six donor atoms so it forms very strong complexes with five chelate rings. Ligands such as [[DTPA]], which have eight donor atoms are used to form co

...232}}</ref> This reagent affects ortho-formylation of activated [[aromatic rings]] such as [[phenols]], producing aryl [[aldehyde]]s in a reaction known as [[simple:Chloroform]]