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Gallic

Gallic

(Science: chemistry) Pertaining to, or containing, gallium.

Origin: From gallium.

Pertaining to, or derived from, galls, nutgalls, and the like.

(Science: chemistry) gallic acid, an organic acid, very widely distributed in the vegetable kingdom, being found in the free state in galls, tea, etc, and produced artificially. It is a white, crystalline substance, with an astringent taste, and is a strong reducing agent, as employed in photography. It is usually prepared from tannin, and both give a dark colour with iron salts, forming tannate and gallate of iron, which are the essential ingredients of common black ink.

Structure: C6H2(HO)3.CO2H

Origin: From gall the excrescence.


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The Fiber Disease

... polyol carbohydrate (usually D-glucose). The hydroxyl groups of the carbohydrate are partially or totally esterified with phenolic groups such as gallic acid (in gallotannins) or ellagic acid (in ellagitannins). Hydrolyzable tannins are hydrolyzed by weak acids or weak bases to produce carbohydrate ...

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by mfromcanada
Fri Dec 01, 2006 6:29 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5428344

The Fiber Disease

... polyol carbohydrate (usually D-glucose). The hydroxyl groups of the carbohydrate are partially or totally esterified with phenolic groups such as gallic acid (in gallotannins) or ellagic acid (in ellagitannins). Hydrolyzable tannins are hydrolyzed by weak acids or weak bases to produce carbohydrate ...

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by J Jill
Fri Dec 01, 2006 5:07 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5428344

confused about HIV

... discovered it in France, but after the controversy with Dr Gallo in the USA, both name started to be used, and as always english took over. My gallic pride is quite upset by this kind of small facts ;) As for the rest, I suggest you start with our dictionnary and our tutorials (see about immunity ...

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by canalon
Fri Dec 02, 2005 1:08 am
 
Forum: Microbiology
Topic: confused about HIV
Replies: 14
Views: 6525


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