C12H22O11

C12H22O11
lactose lac"tose` (l[a^]k"t[=o]s`), n. 1. (Physiol. Chem.) The main sugar present in milk, called also {sugar of milk} or {milk sugar}. When isolated pure it is obtained crystalline; it is separable from the whey by evaporation and crystallization. It is a disaccharide with the formula {C12H22O11}, being chemically 4-([beta]-D-galactosido)-D-glucose. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called {lactin}. When hydrolyzed it yields glucose and galactose. In cells it may be hydrolyzed by the enzyme [beta]-galactosidase. [1913 Webster +PJC]

2. (Chem.) See {Galactose}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • C12H22O11 — The molecular formula C12H22O11 may refer to many chemical compounds including the disaccharides: *Cellobiose (HOCH2CHO(CHOH)3)2O *Gentiobiose (amygdalose) *Lactose *Maltose *Sucrose Simple C12H22O11 is table sugar. *Trehalose C12H22O11 bull;2H2O …   Wikipedia

  • C12H22O11 — Maltose Malt ose (m[add]lt [=o]s ), n. [From {Malt}.] (Biochem.) A crystalline disaccharide ({C12H22O11}) formed from starch by the action of diastase of malt, and the amylolytic ferment of saliva and pancreatic juice; called also {maltobiose}… …   The Collaborative International Dictionary of English

  • C12H22O11 — Sucrose Su crose , n. [F. sucre sugar. See {Sugar}.] (Chem.) A common variety of sugar found in the juices of many plants, as the sugar cane, sorghum, sugar maple, beet root, etc. It is extracted as a sweet, white crystalline substance which is… …   The Collaborative International Dictionary of English

  • C12H22O11 — Sugar Sug ar, n. [OE. sugre, F. sucre (cf. It. zucchero, Sp. az[ u]car), fr. Ar. sukkar, assukkar, fr. Skr. [,c]arkar[=a] sugar, gravel; cf. Per. shakar. Cf. {Saccharine}, {Sucrose}.] 1. A sweet white (or brownish yellow) crystalline substance,… …   The Collaborative International Dictionary of English

  • C12H22O11 —      Cette page répertorie différents isomères, c’est à dire les molécules qui partagent la même formule brute. C12H22 …   Wikipédia en Français

  • Сахарум - Saccharum, Сахароза — C12H22O11 сахароза или сахар свекловичный, тростниковый; молочный сахар (лактоза). Белые кристаллы, легко растворимые в воде, очень легко гидролизуются с образованием глюкозы и фруктозы. Сахароза широко распространена в растительном мире в… …   Справочник по гомеопатии

  • Sucrose — Sucrose …   Wikipedia

  • Kohlehydrate — Kohlehydrate. Eine große Gruppe von organischen, aus Kohlenstoff, Wasserstoff und Sauerstoff bestehenden Substanzen, welche miteinander durch enge Beziehungen verknüpft sind und welche von der Natur in gewaltiger Menge im pflanzlichen und… …   Lexikon der gesamten Technik

  • Термохимия — отдел химии, занимающийся превращениями внутренней энергии тел в тепло при химических процессах. Почти каждая химическая реакция связана с тем или иным тепловым эффектом: химическое превращение сопровождается или выделением, или поглощением тепла …   Энциклопедический словарь Ф.А. Брокгауза и И.А. Ефрона

  • Lactose — (Milk sugar) IUPAC name β D galactopyranosyl (1→4) D glucose …   Wikipedia

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