| mycolic acids | Long-chain cyclopropanecarboxylic acids (C19-C21), further substituted by long-chain (C24-C30) alkanes containing free hydroxyl groups, found in certain bacteria; these waxy substances appear to be responsible for the acid-fastness of the bacteria that contain them. Synonym: mykol. (05 Mar 2000) |
|---|---|
| polymethacrylic acids | Poly-2-methylpropenoic acids. Used in the manufacture of methacrylate resins and plastics in the form of pellets and granules, as absorbent for biological materials and as filters; also as biological membranes and as hydrogens. Synonym: methylacrylate polymer; poly(methylacrylate); acrylic acid methyl ester polymer. (12 Dec 1998) |
| coumaric acids | Hydroxycinnamic acid and its derivatives. Act as activators of the indoleacetic acid oxidizing system, thereby producing a decrease in the endogenous level of bound indoleacetic acid in plants. (12 Dec 1998) |
| myristic acids | 14-carbon saturated monocarboxylic acids. (12 Dec 1998) |
| crotonic acids | 2-butenoic acids. 4-carbon monounsaturated monocarboxylic acids with the unsaturation in the 2 position. (12 Dec 1998) |
| saturated fatty acids | In eukaryotic membranes refers to stearic, palmitic and myristic acids, that are linear aliphatic chains with no double bonds. Prokaryotes have numerous branched chain saturated fatty acids. (18 Nov 1997) |
| propionic acids | 3-carbon saturated monocarboxylic acids. (12 Dec 1998) |
| heptanoic acids | 7-carbon saturated monocarboxylic acids. (12 Dec 1998) |
| prostanoic acids | 2-octylcyclopentaneheptanoic acids. The family of saturated carbon-20 cyclic fatty acids that represent the parent compounds of the prostaglandins. (12 Dec 1998) |
| hexuronic acids | Term used to designate tetrahydroxy aldehydic acids obtained by oxidation of hexose sugars, i.e. Glucuronic acid, galacturonic acid, etc. Historically, the name hexuronic acid was originally given to ascorbic acid. (12 Dec 1998) |
| pteroylpolyglutamic acids | Derivatives of folic acid (pteroylglutamic acid). In gamma-glutamyl linkage they are found in many tissues. They are converted to folic acid by the action of pteroylpolyglutamate hydrolase or synthesised from folic acid by the action of folate polyglutamate synthetase. Synthetic pteroylpolyglutamic acids, which are in alpha-glutamyl linkage, are active in bacterial growth assays. (12 Dec 1998) |
| humic acids | <chemical> Allomelanins found in soils, coals, and peat, resulting from the decomposition of organic matter, particularly dead plants. They are a mixture of complex macromolecules having polymeric phenolic structures with the ability to chelate metals, especially iron. (merck index, 11th ed) Pharmacological action: chelating agents. Chemical name: Humic acids (12 Dec 1998) |
| hydroxamic acids | A class of weak acids with the general formula r-conhoh. (12 Dec 1998) |
| hydroxy acids | Organic compounds containing both the hydroxyl and carboxyl radicals. (12 Dec 1998) |
| hydroxybenzoic acids | Benzoic acid substituted by one or more hydroxy groups in any position on the benzene ring. (12 Dec 1998) |