Information | |
---|---|
has gloss | (noun) a yellow dye made from the bark of the quercitron oak tree quercitron |
has gloss | eng: Quercitron is a yellow dye obtained from the bark of the Eastern Black Oak (Quercus velutina), a fine forest tree indigenous in North America. The name is a shortened form of quercicitron, from Latin quercus, oak, and citron, lemon, and was invented by Dr Edward Bancroft (1744-1821), who by act of parliament in 1785 was granted special privileges in regard to the importation and use of the substance. The dyestuff is prepared by grinding the bark in mills after it has been freed from its black epidermal layer, and sifting the product to separate the fibrous matter, the fine yellow powder which remains forming the quercitron of commerce. The ruddy-orange decoction of quercitron contains quercitannic acid, whence its use in tanning, and an active dyeing principle, quercitrin, C21H20O12. The latter substance is a glycoside, and in aqueous solution under the influence of mineral acids it yields quercetin, C15H10O7, which is precipitated, and the methyl-pentose rhamnose. |
lexicalization | eng: quercitron |
subclass of | (noun) a usually soluble substance for staining or coloring e.g. fabrics or hair dye, dyestuff |
Meaning | |
---|---|
Finnish | |
has gloss | fin: Kversitroni on keltainen väriaine. Kversitronin aglykoni on kversetiini ja siihen kiinnittyvä sokeriosa (glykoni) on ramnoosi (luonnossa esiintyvä deoksi-sokeri, joka voidaan luokitella joko metyyli-pentoosiksi tai 6-deoksi-heksoosiksi). Kversitronia voidaan eristää pohjoisamerikkalaisen mustatammen kaarnasta. Kversitroni ei liukene lämpimään veteen ja kuumaankin veteen hyvin vähän, mutta hyvin alkoholeihin. |
lexicalization | fin: Kversitroni |
Castilian | |
has gloss | spa: Quercitron es un amarillo colorante obtenida de la corteza del Negro roble (Quercus velutina), una multa de bosques árbol indígenas en la América del Norte . El nombre es una forma abreviada de quercicitron, del latín de Quercus, roble, y limón, y fue inventado por el Dr Edward Bancroft (1744-1821), que por ley del Parlamento En 1785 se concedió privilegios especiales en cuanto a la importación y el uso de la sustancia. La colorante es preparado por la corteza en la molienda de los molinos, después de haber sido liberado de su negro capa epidérmica, y el producto cribado para separar el fibroso tema, el fino polvo de color amarillo que sigue formando La quercitron de comercio. El naranja rojizo - decocción de quercitron contiene quercitannic ácido, de ahí su uso en curtido, y de un principio activo teñido, quercitrin, C 21 H 20 O 12 . |
lexicalization | spa: quercitron |
Links | |
---|---|
Show unreliable ▼ | |
similar | e/Quercitron |
Media | |
---|---|
media:img | Quercitrin.png |
Lexvo © 2008-2024 Gerard de Melo. Contact Legal Information / Imprint