10 LIVRES EN ANGLAIS EN RAPPORT AVEC «PYROGALLIC»
Découvrez l'usage de
pyrogallic dans la sélection bibliographique suivante. Des livres en rapport avec
pyrogallic et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
475 \V hen acetic or citric acid is mixed with the pyrogallic, the reducing action is
retarded, much more by the citric, than by the acetic acid. It is in order Co prevent
a too rapid decomposition, by which the plate would be speedily covered with ...
William Thomas Brande,
1863
2
A dictionary of arts, manufactures, and mines: containing a ...
In examining the substances which yield pyrogallic acid, Stenhoo.se states, that
he could obtain pure tannin only from nutgalls, let his process be ever so
carefully conducted. Pure tannin and gallic acid are the only substances which
are ...
Andrew Ure, Robert Hunt,
1853
All these 'precautions are necessary, because, at an elevated temperature, dry
gallic acid decomposes into water, and into pyrogallic, metagallic, melangallic,
and carbonic acids. Two atoms of gallic acid will produce two atoms of pyrogallic
...
4
The Elements of Materia Medica and Therapeutics
Pyrogallic acid is a crystallisable volatile acid. It is readily soluble in water,
alcohol, and ether. It differs remarkably from gallic acid by reason of its very great
solubility in cold water. It is usually seen in white crystalline scales. It melts at 257
°, ...
5
Chemistry of Organic Bodies, Vegetables
OF PYROGALLIC ACID. Berzelius stated it as his opinion that gallic acid,
obtained from the infusion of nutgalls by the process described in the Chemistry
of Inorganic Bodies (vol. ii. p. 100), was not free from tannin, and that the only
method of ...
6
Journal of the Philadelphia College of Pharmacy
The latter he calls pure gallic acid, and the other pyrogallic acid. When very white
gallic acid, giving no indication of tannin to gelatine, was moderately heated, it
became a brown liquid, which crystallized on cooling, and which, dissolved in ...
Philadelphia College of Pharmacy,
1832
To begin the experiment, place enough pyrogallic acid in the bottle to bring the
level of the liquid up to the eight ounce graduation when the bottle is corked and
inverted. This means that only the neck and a small portion of the top of the bottle
...
8
Elements of Chemistry: Including the Recent Discoveries and ...
On this account many of the metallic solutions are precipitated by gallic acid.
Pyrogallic Acid. — One of the processes by which it has been usual to prepare
gallic acid is by sublimation. The impure acid obtained from the gall-nut is
exposed to ...
9
The London, Edinburgh and Dublin Philosophical Magazine and ...
of pyrogallic acid bright red and then blackens them. Moist chlorine, when sent
through a solution of pyrogallic acid, gives it a hyacinth-red colour, and evolves
much muriatic acid ; no precipitate fell, however, and when left to spontaneous ...
10
American Journal of Pharmacy
The residue, when dissolved, gave a brown liquor, which became much deeper
with persulphnte of iron, and blue-black with protosulphate (these being
characters of pyrogallic acid, and not of gallic acid); and it also abundantly
precipitated ...
5 ACTUALITÉS CONTENANT LE TERME «PYROGALLIC»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
pyrogallic est employé dans le contexte des actualités suivantes.
Wet plate photography to be featured at sesquicentennial …
The cap was replaced and the container with the plate was taken to the darkroom, where it was developed in a solution of pyrogallic acid, washed with water ... «Lynchburg News and Advance, avril 15»
Acorns fatally poison 50 ponies in English forest
The pyrogallic acid and tannins in them can cause fatal kidney and stomach damage. The acorns have also claimed the lives of at least 16 cattle. «Horsetalk, nov 13»
What Is Wet Plate Photography?
Some of the chemicals used in these processes are poisonous (pyrogallic acid, silver nitrate, zinc bromide, cyanide and denatured alcohol); corrosive (silver ... «Gizmodo UK, déc 11»
Nuggets from the life of an artist king
The king had wanted to know the relative benefit of using pyrogallic and oxalate developers. Often reviled for ill-treating his nephew Kumar Nabadwip Chandra ... «Calcutta Telegraph, avril 07»
Diverse portraits with a chilly edge
... produced several highly disciplined compositions of the still orderly darkroom, complete with the inevitable photographic chemical of the day - pyrogallic acid. «Sydney Morning Herald, mai 05»