Papers, Numéros 121 à 145 |
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Expressions et termes fréquents
above-described above-mentioned acetic anhydride acetyl derivative acidified alcoholic extract alkaline liquid alkaloid ammonium carbonate amyl alcohol aqueous liquid boiling brown Calc cent CHEMICAL RESEARCH LABORATORIES chloride chloroform CO₂ colour colourless compound concentrated consisted constituents contained crystallised current of steam d-phenylglucosazone dark-coloured described dilute alcohol diminished pressure dissolved distilled under diminished dried emodin emodin monomethyl ether eseroline essential oil ester ethereal extract ethereal liquid ethereal solution ethyl acetate evaporated extracted successively extracted with ether fatty acids filtrate following result fraction gelsemine glucosidic grammes grams H₂O heated hot alcohol hydrochloric acid hydrolysis insoluble ipuranol isolated jalapinolic latter material mixture needles obtained petroleum extract Pharm physostigmine phytosterol portion potassium hydroxide powder precipitate pyridine requires resin root rotatory power rubreserine salt scammony scopoletin seed separated shaken small amount small quantity sodium carbonate sodium hydroxide solid soluble in water solvent removed Soxhlet apparatus sparingly soluble sulphuric acid tube viscid washed WELLCOME CHEMICAL RESEARCH yielded
Fréquemment cités
Page 14 - An alcoholic extract of the dried roots, when distilled in a current of steam, yielded a small amount of a pale yellow essential oil, which possessed a characteristic odour.
Page 38 - Furan-j8-carboxylic acid is sparingly soluble in cold water, but readily soluble in hot water, ethyl acetate, and alcohol.
Page 6 - This oil had the following constants :— d 15°/15° = 0-9381 ; <ZD + 1° 16- in a 25 Mm. tube. From the portion of the alcoholic extract which was soluble in water there were isolated a small amount of a colourless crystalline substance (mp 83^).
Page 10 - Leguminosse, sub-fam. Caesalpinaceae), a tree indigenous to central and western Africa. The bark of the tree is also known as sassy bark, casca bark, doom bark, and in the vernacular of the Congo as Nkasa. It has been employed by the natives of western Africa as an ordeal in their trials for witchcraft and sorcery, as well as for other criminal purposes, and apparently also enters into the composition of the arrow-poison of the Pigmies. A chemical examination of the bark...
Page 23 - This salt was obtained as a white, amorphous precipitate on the addition of a solution of silver nitrate to a solution of the sodium salt.
Page 963 - It also gave a mixture of alkaloids, the principal constituent of which is an amorphous, strongly basic product, designated buphanine, which possesses a physiological action similar to that of hyoscine. A weakly basic and a water-soluble alkaloid were also obtained, together with a small amount of narcissine, Cu;H]7O4N.
Page 963 - An alcoholic extract of the inner portion of the bulbs, when distilled with steam, yielded a small amount of an essential oil •containing furfuraldehyde.
Page 23 - This ester was prepared by passing dry hydrogen chloride into a solution of the acid in methyl alcohol at the boiling temperature.