Aldoses
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Aldoses are carbohydrates containing a free aldehyde group. They include all major natural carbohydrates except fructose, and differ from ketoses in their oxidation products, lack of Selivanov's reaction, and behavior with bromine water.
Encyclopedia entry (1928–1936)
ALDOSES, carbohydrates containing a free aldehyde group. To A. belong all the most important natural carbohydrates (glucose, galactose, mannose, etc.), with the exception of fructose (ketohexose). A. differ from ketoses (see) in that 1) upon oxidation they give hydroxyacids with the same number of carbon atoms, whereas ketoses break down with the formation of lower acids; 2) they do not give the Selivanov reaction (see Selivanov's reaction); 3) upon treatment with bromine water they lose their reducing ability. - Aldoses are determined quantitatively by titration with iodine solution according to Willstätter and Schudel; see also Carbohydrates.
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“Aldoses.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/aldoses/