Alkaline solutions of pyrogallol, benzene-1, 2, 3-triol absorb oxygen from the air, and are used in the determination of the atmospheric concentration of oxygen.
22.
In preparation of food by smoking, guaiacol contributes mainly to the smoky taste, while the dimethyl ether of pyrogallol, syringol, is the main chemical responsible for the smoky aroma.
23.
Most polyphenols contain repeating phenolic moieties of pyrocatechol, resorcinol, pyrogallol, and phloroglucinol connected by esters ( hydrolyzable tannins ) or more stable C-C bonds ( nonhydrolyzable condensed tannins ).
24.
Catechol and resorcinol ( benzenediol ) types of polyphenols have two, and pyrogallol and phloroglucinol ( benzenetriol ) types have three phenolic hydroxyl groups, respectively, though mixing of these types within polyphenols is also possible.
25.
However, WD2D differs from older pyrogallol-based film developers like the ABC Pyro formula used by Edward Weston because WD2D is designed to work well with modern, single-emulsion black-and-white films.
26.
The FDA regularly issues warnings to consumers about avoiding any temporary tattoos labeled as black henna or pre-mixed henna as these may contain potentially harmful ingredients including silver nitrate, carmine, pyrogallol, disperse orange dye and chromium.
27.
WD2D gave me the tonal characteristics I needed to best communicate what I needed to communicate . " WD2D is similar to other pyrogallol-based film developers because it promotes high sharpness and granularity while smoothing grain using a dye mask.
28.
The enzyme pyrogallol hydroxytransferase uses 1, 2, 3, 5-tetrahydroxybenzene and 1, 2, 3-trihydroxybenzene ( pyrogallol ) to produce 1, 3, 5-trihydroxybenzene ( phloroglucinol ) and 1, 2, 3, 5-tetrahydroxybenzene.
29.
The enzyme pyrogallol hydroxytransferase uses 1, 2, 3, 5-tetrahydroxybenzene and 1, 2, 3-trihydroxybenzene ( pyrogallol ) to produce 1, 3, 5-trihydroxybenzene ( phloroglucinol ) and 1, 2, 3, 5-tetrahydroxybenzene.
30.
The enzyme pyrogallol hydroxytransferase uses 1, 2, 3, 5-tetrahydroxybenzene and 1, 2, 3-trihydroxybenzene ( pyrogallol ), whereas its two products are 1, 3, 5-trihydroxybenzene ( phloroglucinol ) and 1, 2, 3, 5-tetrahydroxybenzene.
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