Dudinka
Dudinka , city (1989 pop. 32,000), Krasnoyarsk Territory, N Siberian Russia, on the Yenisei River. It is the river port for the Norilsk mining area and is accessible to seagoing ships. It is connected by rail with Norilsk. Founded in 1616 as a winter outpost on the Yenisei, Dudinka became a city in 1951. It was the capital of the Taymyr Autonomous Area (1930-2007; see under Taymyr Peninsula ).
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methanal
Book article from: World Encyclopedia
methanal ( formaldehyde , HCHO ) Colourless, inflammable, poisonous...Hofmann (1818–92) discovered it in 1867. Most methanal is in the form of formalin. Methanal is used in the manufacture of dyes and plastics. Chief properties...
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Fehling's test
Book article from: A Dictionary of Biology
...solution. After boiling, a positive result is indicated by the formation of a brick-red precipitate of copper(I) oxide. Methanal, being a strong reducing agent, also produces copper metal; ketones do not react. The test is now little used, having...
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formaldehyde
Book article from: World Encyclopedia
formaldehyde Alternative name for methanal
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