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The chemistry of tannis: C. Etti (Monatssh, 10, 647 and 805, through Journal of Society of Chemical Industry)

✍ Scribed by H.T

Publisher: Elsevier Science
Year: 1890
Tongue: English
Weight: 148 KB
Volume: 130
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(90)90112-v

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✦ Synopsis

I55

CHEMISTRY.

THE CHEMISTRY OF TANNINS-C. Etti (Monatsl'z, 10, 647 and 805, through fo2cma/ of Socie@ of ChwticaC I.&s&y).-The results of previous investigations have shown that the tannin C,,H1,O, obtained from Quercus YO~WL, and that obtained from Qzlercus pudercens W, occur in the oak bark not only in the form of tannic acid, but also as the anhydride;

it was also found that the tannicacids, which are almost insoluble in water, do not occur in combination with a sugar, and are not therefore glucosides; their basis is not tannin, but a substance isomeric therewith, namely, a ketone acid (gallylgallic acid) of the constitution-

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