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14.11.2018 05:19 - Alkaloids History
Автор: fdgjhgfhrt Категория: Други   
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Alkaloid-containing plants accept been used by bodies back age-old times for ameliorative and recreational purposes. For example, alleviative plants accept been accepted in the Mesopotamia at atomic about 2000 BC. The Odyssey of Homer referred to a allowance accustomed to Helen by the Egyptian queen, a biologic bringing oblivion. It is believed that the allowance was an opium-containing drug.A Chinese book on houseplants accounting in 1st–3rd centuries BC mentioned a medical use of Ephedra and opium poppies.Also, coca leaves accept been used by South American Indians back age-old times.

Extracts from plants absolute baneful alkaloids, such as aconitine and tubocurarine, were used back antique for contagion arrows.

Studies of alkaloids began in the 19th century. In 1804, the German chemist Friedrich Sertьrner abandoned from opium a "soporific principle" (Latin: principium somniferum), which he alleged "morphium" in account of Morpheus, the Greek god of dreams; in German and some added Central-European languages, this is still the name of the drug. The appellation "morphine", used in English and French, was accustomed by the French physicist Joseph Louis Gay-Lussac.

A cogent addition to the allure of alkaloids in the aboriginal years of its development was fabricated by the French advisers Pierre Joseph Pelletier and Joseph Bienaimй Caventou, who apparent blame (1820) and strychnine (1818). Several added alkaloids were apparent about that time, including xanthine (1817), atropine (1819), caffeine (1820), coniine (1827), nicotine (1828), colchicine (1833), sparteine (1851), and cocaine (1860).

The aboriginal complete amalgam of an alkaloid was accomplished in 1886 by the German chemist Albert Ladenburg. He produced coniine by reacting 2-methylpyridine with acetaldehyde and abbreviation the consistent 2-propenyl pyridine with sodium. The development of the allure of alkaloids was accelerated by the actualization of spectroscopic and chromatographic methods in the 20th century, so that by 2008 added than 12,000 alkaloids had been identified.

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