pyrogallol वाक्य
उदाहरण वाक्य
मोबाइल
- 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.
- 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.
- 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 ).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Phenol oxidase activity is quantified by oxidation of L-3, 4-dihydoxyphenylalanine ( L-DOPA ), pyrogallol ( 1, 2, 3-trihydroxybenzene ), or ABTS ( 2, 2-azino-bis ( 3-ethylbenzothiazoline-6-sulphonic acid ).
- The gradual darkening of the ink is due to the oxidation of the iron ions from ferrous ( Fe 2 + ) to ferric ( Fe 3 + ) state by atmospheric oxygen . ( For that reason, the liquid ink had to be stored in a well-stoppered bottle, and often became unusable after a time . ) The ferric ions react with the tannic acid or some derived compound ( possibly gallic acid or pyrogallol ) to form a polymeric organometallic compound.
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