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Digallic acid

Digallic acid (= Gallic acid (Rubiaceae) From Gallotannins Bitter... [Pg.408]

Tannic acid-silver nitrate test The basis of this test is the reducing action of tannic acid (a glucoside of digallic acid) upon the silver ammine complex [Ag(NH3)2]+ to yield black silver it therefore precipitates silver in the presence of ammonia but not from a slightly acid silver nitrate solution. [Pg.295]

Synonyms Digallic acid Chinese tannin Gallo-tannic acid Galloylglucose Glycerite Digalloyl glucose Tannin Tannins... [Pg.2525]

Agrimoniin (150), Coriarin A (151), Hepta Octagalioylglucoses Ellagic acid (152), Digallic acid (153), 1,3,4-Tri-O-galloylquiniC acid (15 4). 3,5-Di-O-... [Pg.510]

Depsidase is specific to the ester bonds between two phenol cycles (e.g. digallic acid). [Pg.246]

Biosynthesis The aromatic hydroxycarboxylic acid is first formed from polyacetates and then esterified enzymatically. Besides in lichens, D. also occur in tanning substances, e.g., in coffee or savory a well-known representative is digallic acid (see tannins). Lit. Culberson Karrer, No. 1023-1053 Zechmeister 41, 1-46 45, 103-234. [Pg.180]

Definition Triester of digallic acid and oleic acid Empirical C68HioeOi2... [Pg.1329]

Digallic Acid (m-DigaUic acid, 5 6-dibydr. oxy-3-carboxyphenyl ester of gaUic acid)... [Pg.808]

In 1908 Fischer began work on tannins. Of the two main varieties of tannin, Turkish and Chinese, he used the second. Many kinds of tannin had been investigated and many different tannic acids described. H. Schiff supposed that oak-bark and gall-nut tannin is digallic acid ... [Pg.832]

Molecular exchange can involve intercalation into the outer exposed monolayer of the vesicle bilayer, as discussed above for lysolipid. Following outer monolayer uptake the molecule can then pass through the bilayer limited by flip-flop across the bilayer midplane [81], In contrast, other less membrane-soluble molecules can bind into the interface but not cross the bilayer. One such molecule is tatmic acid, a polyphenolic compound composed of a central ring derivatized with five digallic acid residues as shown in Figure 9.17 [99]. [Pg.133]

See other pages where Digallic acid is mentioned: [Pg.104]    [Pg.227]    [Pg.18]    [Pg.114]    [Pg.367]    [Pg.1047]    [Pg.652]    [Pg.25]    [Pg.25]    [Pg.27]    [Pg.365]    [Pg.652]    [Pg.652]    [Pg.135]    [Pg.496]    [Pg.540]    [Pg.542]    [Pg.248]    [Pg.253]    [Pg.631]    [Pg.181]    [Pg.698]    [Pg.1963]    [Pg.1963]    [Pg.160]    [Pg.161]    [Pg.22]    [Pg.454]    [Pg.655]    [Pg.655]    [Pg.656]    [Pg.194]   
See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.5 , Pg.9 , Pg.9 , Pg.10 ]

See also in sourсe #XX -- [ Pg.540 ]

See also in sourсe #XX -- [ Pg.832 ]

See also in sourсe #XX -- [ Pg.160 ]

See also in sourсe #XX -- [ Pg.643 ]



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M-Digallic acid

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