| ammonium sulphate precipitation | <technique> In this technique, ammonium sulphate is used to make proteins precipitate out of a solution, the proteins are then collected by centrifugation. (09 Oct 1997) |
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| capsular precipitation reaction | Swelling of the capsule surrounding a bacterium as a result of interaction with anticapsular antibody, consequently the capsule becomes more refractile and conspicuous. (18 Nov 1997) |
| precipitation | The act or process of precipitating. Origin: L. Praecipitatio (18 Nov 1997) |
| precipitation curve | A graph of the quantity of precipitate formed as a function of the quantity of antigen added during the titration of an antibody with an antigen. Synonym: Heidelberger curve. (05 Mar 2000) |
| precipitation test | An in vitro test in which antigen is in soluble form and precipitates when it combines with added specific antibody in the presence of an electrolyte. See: gel diffusion precipitin tests, ring precipitin test. Synonym: precipitation test. (05 Mar 2000) |
| hapten inhibition of precipitation | Inhibition of precipitation that occurs when the precipitin has combined with hapten of the same specificity as the subsequently added antigen. (05 Mar 2000) |
| double antibody precipitation | A method of separating antibody-bound antigen (e.g., insulin) from free antigen by precipitating the former with antibody specific for immunoglobulin. Synonym: double antibody immunoassay, double antibody method. (05 Mar 2000) |
| immune precipitation | <immunology> The precipitation of a multivalent antigen by a bivalent antibody, resulting in the formation of a large complex. The antibody and antigen must be soluble. Precipitation usually occurs when there is near equivalence between antibody and antigen concentrations. (18 Nov 1997) |
| isopropanol precipitation test | A test using the principle that the internal bonds of haemoglobin are weakened by nonpolar solvents; thus, unstable haemoglobins will precipitate more rapidly than other haemoglobins in isopropanol. (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) |
| artificial Carlsbad salt | A mixture of potassium sulfate, sodium chloride, sodium bicarbonate, and dried sodium sulfate; a laxative. (05 Mar 2000) |
| artificial Kissingen salt | A mixture of potassium chloride, sodium chloride, anhydrous magnesium sulfate, and sodium bicarbonate; an antacid and laxative. (05 Mar 2000) |
| artificial Vichy salt | A mixture of sodium bicarbonate, anhydrous magnesium sulfate, potassium carbonate, and sodium chloride; an antacid. (05 Mar 2000) |
| basic salt | A salt in which there are one or more hydroxyl ions not replaced by the electronegative element of an acid; e.g., Fe(OH)2Cl. (05 Mar 2000) |
| bile salt | <biochemistry> Amphipathic compounds that aid digestion and lipid absorption, they are derived from steroids and have some detergent properties. (09 Oct 1997) |