| reagent strips | Narrow pieces of material impregnated or covered with a substance used to produce a chemical reaction. The strips are used in detecting, measuring, producing, etc., other substances. (12 Dec 1998) |
|---|---|
| Marme's reagent | A solution of potassium iodide and cadmium iodide used in testing for alkaloids. (05 Mar 2000) |
| Marquis' reagent | A solution of formaldehyde in sulfuric acid used in colour tests for formaldehyde. (05 Mar 2000) |
| Girard's reagent | The hydrazine of betaine chloride, used to extract ketonic steroids by forming water-soluble hydrazones with them. (05 Mar 2000) |
| Mecke's reagent | A solution of selenous acid in sulfuric acid, used for colour tests of alkaloids. (05 Mar 2000) |
| melzer's reagent | A stain used to study the cellular structure of fungi. (09 Oct 1997) |
| Gunzberg's reagent | Phloroglucin and vanillin used as a reagent in Gunzberg's test. (05 Mar 2000) |
| Meyer's reagent | A solution of phenolphthalein 0.032, in decinormal sodium hydroxide 21, with water (distilled from glass) sufficient to make 100; in the presence of minute traces of blood, the solution becomes purple or blue-red. (05 Mar 2000) |
| Rosenthaler-Turk reagent | A solution of potassium arsenate in sulfuric acid used in obtaining colour tests for various opium alkaloids. (05 Mar 2000) |
| Millon's reagent | Mercuric nitrate and nitric acid as used in the Millon reaction. (05 Mar 2000) |
| Cleland's reagent | <chemical> A reagent commonly used in biochemical studies as a protective agent to prevent the oxidation of sh (thiol) groups and for reducing disulphides to dithiols. Pharmacological action: sulfhydryl reagents, expectorants. Chemical name: 2,3-Butanediol, 1,4-dimercapto-, (R*,R*)- (12 Dec 1998) |
| Wurster's reagent | Filter paper impregnated with tetramethyl-p-phenylenediamine, which turns blue in the presence of ozone or hydrogen peroxide. (05 Mar 2000) |
| cross-linking reagent | <chemistry> Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other. (12 Dec 1998) |
| Hahn's oxine reagent | An alcoholic solution of 8-hydroxyquinoline used in the determination of zinc, aluminum, magnesium, etc. (05 Mar 2000) |
| Hammarsten's reagent | A mixture of 1 part 25% solution of nitric acid and 19 parts 25% solution of hydrochloric acid; the addition of a few drops to a mixture of 1 part of this reagent and 4 parts alcohol will give a green colour if bile is present. (05 Mar 2000) |