quercitannoformとは 意味・読み方・使い方

名詞

quercitannoform (uncountable)

1. (obsolete) Tannoform derived from quercitannin or quercitannic, rather than gallotannic, acid.
   • 1896, Institute of Brewing (Great Britain), Journal of the Federated Institutes of Brewing, page 290:

     Quercitannoform, CH2(C1, H13O7)2 + H2O, from quercitannic acid and formaldehyde, is a reddish - yellow powder which blackens at 275°; it is insoluble in water, ammonia, and soda, and its solution in sulphuric acid, which […]

   • 1896, The Pharmaceutical Era, page 455:

     QUERCITANNOFORM is prepared in the same oak-bark, forming a yellowish-red powder, insoluble in water, alkalies and other organic solvents. In addition, Quecitannoform  […]

参照

• Dorland's Illustrated Medical Dictionary, 1925, page 959: “quercitannoform (kwer-sit-an'o-form). A variety of tannoform prepared with quercitannic, instead of gallotannic, acid.”