| phosphorous acids | Inorganic or organic derivatives of phosphorous acid (p(oh)3). Inorganic salts are known as phosphites. The tautomeric form of this compound (hpo(oh)2) = phosphonic acids. (12 Dec 1998) |
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| phosphorus acids | Inorganic acids that contain phosphorus as an integral part of the molecule. (12 Dec 1998) |
| clavulanic acids | <chemical> Acids, salts, and derivatives of clavulanic acid (c8h9o5n). They consist of those beta-lactam compounds that differ from penicillin in having the sulfur of the thiazolidine ring replaced by an oxygen. They have limited antibacterial action, but block bacterial beta-lactamase irreversibly, so that similar antibiotics are not broken down by the bacterial enzymes and therefore can exert their antibacterial effects. Pharmacological action: antibiotics, lactam, enzyme inhibitors. (12 Dec 1998) |
| phthalic acids | A group of compounds that has the general structure of a dicarboxylic acid-substituted benzene ring. The ortho-isomer is used in dye manufacture. (12 Dec 1998) |
| pimelic acids | A group of compounds that are derivatives of heptanedioic acid with the general formula r-c7h11o4. (12 Dec 1998) |
| monounsaturated fatty acids | A fatty acid chain with at least two empty spaces that could be hydrogenated (have a hydrogen atom added). Saturated (hydrogenated) fatty acids are a greater health risk for the development of atherosclerotic vascular disease. (27 Sep 1997) |
| muramic acids | Compounds consisting of glucosamine and lactate joined by an ether linkage. They occur naturally as n-acetyl derivatives in peptidoglycan, the characteristic polysaccharide composing bacterial cell walls. (12 Dec 1998) |
| polyamino acids | Polypeptides that are polymers of aminoacyl groups, i.e., of -NH-CHR-CO-; typically, a term used with homopolymers. See: poly-. (05 Mar 2000) |
| polyenic acids | Fatty acids with more than one double bonds in the carbon chain; e.g., linoleic, linolenic, and arachidonic acids. Synonym: polyenic acids. (05 Mar 2000) |
| polyenoic acids | Fatty acids with more than one double bonds in the carbon chain; e.g., linoleic, linolenic, and arachidonic acids. Synonym: polyenic acids. (05 Mar 2000) |
| 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) |
| 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) |