| bent grass | <botany> A reedlike grass of the genus Agrostis, especially. Agrostis vulgaris, or redtop. The name is also used of many other grasses, especially in the US. (06 Aug 1998) |
|---|---|
| benthos | <ecology> Animals and plants living on or within the substrate of a water body (freshwater, estuarine or marine). (06 Aug 1998) |
| bentiromide | 4-[[(2-Benzoylamino)-3-(4-hydroxyphenyl)-1-oxopropyl]amino ]benzoic acid;a peptide used as a screening test for exocrine pancreatic insufficiency and to monitor the adequacy of supplemental pancreatic therapy. (05 Mar 2000) |
| bentiromide test | A test of pancreatic exocrine function that does not require duodenal intubation: orally administered bentiromide is cleaved by chymotrypsin within the lumen of the small intestine, releasing p-aminobenzoic acid which is absorbed and excreted in the urine; diminished urinary excretion of p-aminobenzoic acid suggests pancreatic insufficiency. (05 Mar 2000) |
| bentonite | <chemical> Bentonite. A native, colloidal, hydrated aluminum silicate which, on the addition of water, swells to produce a slippery paste. Its chief pharmaceutical use is as a suspending agent and it has also been used as a bulk laxative. Chemical name: Bentonite (12 Dec 1998) |
| bentonite flocculation test | A flocculation test for rheumatoid arthritis in which sensitised bentonite particles are added to inactivated serum; the test is positive if half of the particles are clumped while the other half remain in suspension. (05 Mar 2000) |
| benz- | Combining form denoting association with benzene. (05 Mar 2000) |
| benzal | <chemistry> A transparent crystalline substance, obtained by the action of ammonia upon chloride of benzoyl, as also by several other reactions with benzoyl compounds. Structure: C6H5.CO.NH2 Origin: Benzoic + aldehyde. (06 Aug 1998) |
| benzalacetophenone | An organic molecule prepared by aldol condensation of acetophenone andbenzaldehyde. (09 Oct 1997) |
| benzalcoumaran-3-one | 1. 2-benzylidene-3(2H)-benzofuranone;the parent compound of a series of plant pigments; they are substituted coumaranones, and may be formed from chalcones. They are often found as glycosides. 2. A class of compounds based on aurone. Synonym: benzalcoumaran-3-one. (05 Mar 2000) |
| benzaldehyde | C6H5CHO;an aldehyde produced artificially or obtained from oil of bitter almond, containing not less than 80% of benzaldehyde; a flavoring agent used in orally administered medicines. Synonym: benzoic aldehyde. (05 Mar 2000) |
| benzaldehyde lyase | <enzyme> Requires thiamine ppi; from pseudomonas fluorescens; cleaves the acycloin linkage of benzoin, producing 2 molecules of benzaldehyde; also acts on anisoin, forming anisaldehyde Registry number: EC 4.1.2.- Synonym: benzoin benzaldehyde lyase (26 Jun 1999) |
| benzalkonium chloride | A mixture of alkylbenzyldimethylammonium chlorides in which the alkyls are long-chain compounds (C8 to C18); a surface-active germicide for many pathogenic nonsporulating bacteria and fungi. Aqueous solutions of this agent have a low surface tension, and possess detergent, keratolytic, and emulsifying properties that aid the penetration and wetting of tissue surfaces. (05 Mar 2000) |
| benzalkonium compounds | <chemical> A mixture of alkylbenzyldimethylammonium compounds. It is a bactericidal quaternary ammonium detergent used topically in medicaments, deodorants, mouthwashes, as a surgical antiseptic, and as a as preservative and emulsifier in drugs and cosmetics. Pharmacological action: anti-infective agents, local, detergents, preservatives, pharmaceutical. (12 Dec 1998) |
| benzamide | <chemistry> A transparent crystalline substance, obtained by the action of ammonia upon chloride of benzoyl, as also by several other reactions with benzoyl compounds. Structure: C6H5.CO.NH2 Origin: Benzoin + amide. (06 Aug 1998) |