Gerlach and others had some luck using carmine to highlight different kinds of cell structures, but where Gerlach got stuck was in exploring the tissues of the brain.
So one day, he tried making a diluted version of the stain — thinning out the carmine with ammonia and gelatin — and wetted a sample of brain tissue with it.
所以有一天,他尝试制作一种稀释版的染色剂——用氨和明胶稀释胭脂红——并用它润湿脑组织样本。
Crash Course 解剖生理学篇
Back in his day, a few scientists had been tinkering with staining tissues, especially with a compound called carmine — a red dye derived from the scales of a crushed-up insects.
By its carmined lip, its near-smart hat, its babbling of " him, " and by the knowledge which looks boldly out of its eyes you know it is tragically old.
And while she looked the carmine flush with which warmth and sound sleep had suffused her cheeks and neck dissolved from view, and the deathlike pallor in his face flew across into hers.
Carmine (/ˈkɑːrmɪn/ or /ˈkɑːrmaɪn/), also called crimson lake or carmine lake, cochineal, natural red 4, C.I. 75470, or E120, is a pigment of a bright-red color obtained from the aluminium salt of carminic acid; it is also a general term for a particularly deep-red color of the same name. The pigment is produced from some scale insects such as the cochineal scale and certain Porphyrophora species (Armenian cochineal and Polish cochineal). Carmine is used in the manufacture of artificial flowers, paints, crimson ink, rouge, and other cosmetics, and is routinely added to food products such as yogurt, candy and certain brands of juice, the most notable ones being those of the ruby-red variety.