| NA | Avogadro constant or number; nalidixic acid; Narcotics Anonymous; network administrator; neuraminida... |
|---|---|
| TCA | T-cell A locus; terminal cancer; tetracyclic antidepressant; total cholic acid; total circulating al... |
| UA | absorption unsharpness; ultra-audible; ultrasonic arteriography; umbilical artery; unauthorized abse... |
| APR | abdominoperineal resection; absolute proximal reabsorption; acute phase reaction or reactant; amebic... |
| ARR | aortic root replacement |
| acid reflux test | A test to detect gastroesophageal reflux by monitoring oesophageal pH by an electrode in the distal oesophagus either basally or after acid is instilled into the stomach. (05 Mar 2000) |
|---|---|
| acid rigor | Coagulation of muscle protein induced by acids. (05 Mar 2000) |
| acid salt | A salt in which not all of the ionizable hydrogen of the acid is replaced by the electropositive element; e.g., NaHSO4, KH2PO4. Synonym: bisalt, protosalt. (05 Mar 2000) |
| acid seromucoid | <biology> Plasma protein of mammals and birds, 38% carbohydrate. In humans a single chain glycoprotein of 39 kD. Increased levels are associated with inflammation, pregnancy and various diseases. (18 Nov 1997) |
| acid soluble spore protein | <molecular biology> A DNA binding protein in the spores of some bacteria, thought to stabilise the DNA in an A configuration, so protecting it from cleavage by enzymes or UV light. (18 Nov 1997) |
| acid stain | <technique> A dye in which the anion is the coloured component of the dye molecule, e.g., sodium eosinate (eosin). (05 Mar 2000) |
| acid sulfate | A salt containing HSO4-. Synonym: acid sulfate. (05 Mar 2000) |
| acid tartrate | A salt of tartaric acid which contains an acid group still capable of combining with a base; e.g., bitartrate. (05 Mar 2000) |
| acid tide | A temporary increase in the acidity of the urine occurring during fasting. Synonym: acid wave. (05 Mar 2000) |
| acid wave | A temporary increase in the acidity of the urine occurring during fasting. Synonym: acid wave. (05 Mar 2000) |
| aconitic acid | <chemical> Chemical name: 1-Propene-1,2,3-tricarboxylic acid (12 Dec 1998) |
| activated carboxylic acid | Derivative of a carboxyl group that is more susceptible to nucleophilic attack than a free carboxyl group; e.g., acid anhydrides, thioesters. (05 Mar 2000) |
| activated fatty acid | A fatty acyl-coenzyme A thiol ester. (05 Mar 2000) |
| acyclic acid | <chemistry> Carboxylic acids that have open-chain molecular structures as opposed to ring-shaped structures. (25 Jun 1999) |
| acyl-CoA-6-aminopenicillanic acid acyltransferase | <enzyme> Acyl CoA and aminopenicillanic acid yield penicillin and CoA Registry number: EC 2.3.1.- Synonym: 6-apa acyltransferase, 6-aminopenicillanic acid-phenacetyl-CoA-phenoxyacetyl-CoA transferase, acyl-coenzyme a-6-aminopenicillanic acid acyltransferase, isopenicillin n-phenylacetyl-CoA acyltransferase, penicillin acyltransferase, isopenicillin n-phenylacetyl-coenzyme a acyltransferase, acyl-CoA-ipn acyltransferase, isopenicillin n acyltransferase, aat gene product, pende gene product (26 Jun 1999) |