eosin

/ee-uh-sin/US // ˈi ə sɪn //UK // (ˈiːəʊsɪn) //

曙光,曙红,曙光号,曙光素

Definitions

n.名词 noun

1
Chemistry.
- : Also called bromeosin, tetrabromofluorescein. a red, crystalline, water-insoluble solid, C20H8Br4O5, derived from fluorescein by bromination: used chiefly as an acid dye for dyeing silk a rose red color and as a histological stain.
- : any of a variety of eosinlike dyes.

Other counterstains may be used such as dilute eosin, dilute fuchsin, or vesuvin.
Wassermann made several eosin preparations, by coupling the sodium derivative with potassium selenocyanide.
The eosin and the selenium were then combined by a method and in a form the details of which have never been published.
In this respect, therefore, they were entirely comparable with the eosin-selenium compound.
Wassermanns results with eosin-selenium were soon critically examined by other observers.