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calumbine
Значение термина calumbine в knolik
calumbine - Calumbine
calumbine - Calumbine is prepared from calumba root (Menisper-nvwm palmatum) by the following methods:
(1) Digest the coarsely powdered root in water acidulated with acetic acid; express, filter, boil to J, again filter, add calcium carbonate in slight excess, and evaporate to dryness in a water-bath; powder the residue, and digest in boiling alcohol; it will deposite crystals of calumbine on cooling.
(2) Evaporate tincture of the root (made with rectified spirit) to dryness; dissolve residue in water, and agitate the solution with equal bulk of ether; after short repose, decant the ethereal portion, distil off most of the ether, and set the liquid aside to crystallise. (Wittstock.)
(3) The powdered root is covered with a 2 to 3 per cent, solution of oxalic acid for some hours, and the resulting extract is neutralised with ammonia, which takes up the calumbic acid, and leaves the calumbine pure. (Alessandri.)
Рядом со словом calumbine в knolik
| brucine | В начало буква "" буквосочетание "" | cascarilline |
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