Definition of Orcein. Meaning of Orcein. Synonyms of Orcein

Here you will find one or more explanations in English for the word Orcein. Also in the bottom left of the page several parts of wikipedia pages related to the word Orcein and, of course, Orcein synonyms and on the right images related to the word Orcein.

Definition of Orcein

Orcein
Orcein Or"ce*in, n. (Chem.) A reddish brown amorphous dyestuff, ?, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus.

Meaning of Orcein from wikipedia

- Orcein, also archil, orchil, lacmus and C.I. Natural Red 28, are names for dyes extracted from several species of lichen, commonly known as "orc****a weeds"...
- same as those of the related mixture known as orcein but in different proportions. In contrast with orcein, the prin****l constituent of litmus has an average...
- O-methylation with dimethylsulfate. It is used in the production of the dye orcein and as a reagent in some chemical tests for pentoses, such as Bial's Test...
- belonging to the family Roccellaceae, commonly called orc****a weed or orchil. Orcein and other lichen dyes have largely been replaced by synthetic versions....
- presence of HBsAg is more commonly demonstrated by the use of the Shikata orcein technique, which uses a natural dye to bind to the antigen in infected liver...
- the EU. E175 Gold Gold Approved in the EU. E180 Pigment Rubine, Lithol Rubine BK Red Approved in the EU. E181 Tannin Brown E182 Orcein, Orchil Purple...
- black color), but aldehyde fuchsin stains, Weigert's elastic stains, and orcein stains also work. These fibers give elastic cartilage great flexibility...
- a plant-based pigment extracted from the Asian tree Caesalpinia sappan. Orcein purple, a dye extracted from several species of lichen found all over the...
- used in histology which is useful in identifying elastic fibers. Often orcein or a combination of resorcinol and fuchsine are used for staining. For counterstaining...
- dye with powder; woad or indigo dye for blue and cochineal dye for red. Orcein, or purple moss, was another common violet dye. It was known to the ancient...