| 单词 | naphthol blue-black |
| 释义 | > as lemmasnaphthol blue-black attributive. In the names of synthetic dyes derived from naphthols, as naphthol blue-black, naphthol green, naphthol yellow, etc. ΚΠ 1889 Science 8 Nov. 309/1 Among these injurious substances are included..coloring-matters containing nitrous vapors, as naphthol yellow, victoria yellow. 1900 Kynoch Jrnl. 2 36/2 The use of picric acid as a dye has been superseded by the use of alizarine and naphtol yellows. 1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) lv. 824 Other examples are:—Resorcin Brown = m-Xylidine → resorcinol ← sulphanilic acid. Naphthol Blue-black = p-Nitraniline → aminonaphtholdisulphonic acid H ← aniline. 1952 A. M. Smith Manures & Fertilisers vii. 174 To reduce the reflection of light and increase the heat absorbed and the rate of evaporation, a dyestuff (naphthol green is satisfactory) is added to the surface brine. 1991 Artist Nov. 16/1 Napthol red. Also called permanent red. Semi-transparent substitute for cadmiums/vermilion... Used mainly in oil, acrylic and alkyd paints. 1998 Internat. Jrnl. Plant Sci. 159 755 Controls for protein..were prepared..and then stained in mercuric bromophenol blue or in naphthol blue black. < as lemmas |
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