单词 | nigrosine |
释义 | nigrosinen. Chemistry. Any of various dark blue or blackish aniline compounds used in dyes, inks, and leather polishes, and as biological stains. ΘΚΠ the world > matter > colour > named colours > black or blackness > blackening agent > [noun] > dye sumac?a1350 sumac black1580 wood-soot1667 Manchester black1862 azurine1878 chestnut-extract1881 nigrosine1881 1881 Science 25 June 304/2 (table) Fluorescent substances... Nigrosine (acid sol.) [By transmitted light] Dirty green [Fluoresces] Red. 1884 Amer. Naturalist 18 651 To a saturated aqueous solution of picric acid add a small quantity of an aqueous solution of nigrosin. 1899 T. C. Allbutt et al. Syst. Med. VIII. 882 They stain well..with hæmatoxylin, congo-red, or acid nigrosin. 1943 Thorpe's Dict. Appl. Chem. VI. 467/2 Following the suggestion of Caro the name Induline is now reserved for those colouring matters produced from amines and azo-compounds whilst the name Nigrosine is reserved for those produced from nitrobenzene or nitrophenols. 1972 Materials & Technol. V. xii. 410 Suitable seasoning mixtures for black [leather] goods may contain hematin, nigrosine, egg albumen, casein, and an anti-mould agent. 1991 Lancet 9 Mar. 609/1 Faeces were examined under direct microscopy..in both physiological saline and 5% aqueous nigrosin (a counterstain, that proved superior for detection of scanty organisms). This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < |
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