Hand-book of Chemistry, Nide 18 (Sähköinen Google-kirja)

Etukansi
Cavendish Society, 1871
0 Arvostelut
  

Mitä ihmiset sanovat - Kirjoita arvostelu

Yhtään arvostelua ei löytynyt.

Sisältö

Yleiset termit ja ilmaukset

Suositut otteet

Sivu 198 - ... useless. Lassaigne and Fenuelle give a qualitative statement only, at the head of which figures cathartin, a principle (?) found also in senna legumes by Fenuelle. This substance is described as being yellowish-red, uncrystallizable, with a peculiar odor and a bitter nauseous taste, very soluble both in water and alcohol, but insoluble in ether. Its aqueous solution is precipitated by infusion of galls, diacetate of lead, etc., etc. Three grains caused nausea, griping and purging. Its preparation...
Sivu 19 - Araucaria brasiliana, A. Rich. " The resin of Araucaria brasiliana exudes from the old trees, especially if the bark has been damaged by beetles, and hardens rapidly in the air. Dull white or dark brown irregular pieces, varying in size from that of a bean to that of a walnut, and elongated drops. Has a faint lustre, and a smooth waxy fracture. Smells balsamic, somewhat turpentine-like, and tastes resinous, biting and aromatic, sticks to the teeth. Heated on platinum foil it carbonises without melting...
Sivu 464 - ... alcohol is approximately insoluble in water. As an improvement on this test, GL Ulex (Neues Jahrb. der Pharm., 39, 333) recommended the following, based on the low temperature at which ethyl alcohol distils; 100 cc of the sample are heated in a retort until 5 cc have passed over; the distillate is shaken with an equal volume of a saturated solution of sodium chloride, and the mixture allowed to stand. If the fusel oil which separates amounts to one-half of the distillate or more, the...
Sivu 334 - Such tissues assume a reddish-brown or more rarely a dirty brown-violet colour, when treated with biniodide of potassium or tincture of iodine. When treated with oil of vitriol and iodine in succession, they acquire a green colour, changing to a dirty violet, or sometimes to blue.
Sivu 29 - On evaporating the solution, it collects on the surface of the liquid in the form of a colourless pellicle, having a fatty lustre, and is ultimately left in light white spangles. — Very bitter (Schuedermanu). Dissolves easily in alcohol and ether (Pelletier & Caventou). Kinorin and Lead-oxide.
Sivu 456 - It is dried in a current of air at a temperature not exceeding 50°, freed from the radicles, coarsely ground, and digested for an hour or two with water of 30°.
Sivu 62 - ... by hydrochloric acid and water. The ricinoleic acid, which is left on evaporating the ethereal layer, is purified by dissolving it in aqueous ammonia, precipitating with chloride of barium, and crystallising the barium-salt from alcohol. From the barium-salt the acid is obtained by decomposition with aqueous hydrochloric acid. Properties. — Ricinoleic acid is a pale wine-yellow syrupy oil, colourless in thin byers.
Sivu 339 - The pepsin of commerce is either mucus of the stomach scraped off and dried, or a mixture of pepsin, peptones and starch, containing a little lactic acid."* Beale's corresponds to the first part of the description, Boudault's and Morson's to the second.
Sivu 27 - From Scammony. — Coarsely-powdered scammony is exhausted with cold alcohol (boiling, according to Keller); the tincture is diluted with water till it becomes turbid, decolorised by animal charcoal, and filtered ; the greater part of the alcohol is distilled off; and the residue mixed with water is heated in a water-bath, till the whole of the alcohol is driven off, after which the resin is treated for a long time in a waterbath, with frequently-renewed hot water, and at last dried up. The residue...
Sivu 353 - N 16-9 ; 0 26-2. The bones of fish and of aquatic birds contain besides ossein a substance insoluble in boiling water, yet apparently of the same composition as ossein. When these bones are freed from limesalts by cold dilute hydrochloric acid, and the residue is washed free from acid, and then boiled with water, the ossein dissolves as gelatin, while a transparent elastic residue, having the form of the bones, remains undissolved (Fremy, N. Ann. Chim. Phys. 43, 51 ; 'NJ Pharm. 27, 1). .Gelatin is...

Kirjaluettelon tiedot