Aldose


Aldose

An aldose is a monosaccharide (a simple sugar) containing one aldehyde group per molecule and having a chemical formula of the form Cn(H2O)n(n>=3).

With only 3 carbon atoms, glyceraldehyde is the simplest of all aldoses.

Aldoses isomerize to ketoses in the Lobry-de Bruyn-van Ekenstein transformation. Aldose differs from ketose in that it has a carbonyl group at the end of the carbon chain whereas the carbonyl group of a ketose is in the middle; this fact allows them to be chemically differentiated through Seliwanoff's test.

List of aldoses

* Triose: glyceraldehyde, dihydroxylacetone
* Tetroses: erythrose, threose
* Pentoses: ribose, arabinose, xylose, lyxose
* Hexoses: allose, altrose, glucose, mannose, gulose, idose, galactose, talose

See also

* Carbohydrate
* Ketose
* Monosaccharide


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  • aldose — [ aldoz ] n. m. • 1890; de ald(éhyde) et 1. ose ♦ Chim. Sucre contenant un groupe aldéhydique. ● aldose nom masculin Ose renfermant une fonction aldéhyde. aldose [aldoz] n. m. ÉTYM. 1904, in Rev. gén. des sc., no 14, p. 707; de ald(éhyde), et… …   Encyclopédie Universelle

  • aldose — |ó| s. f. Nome genérico dos glicídios que apresentam funções de aldeído …   Dicionário da Língua Portuguesa

  • aldose — [al′dōs΄] n. [ ALD(EHYDE) + OSE2] Chem. any sugar containing the aldehyde group, CHO …   English World dictionary

  • Aldose — Projection de Fischer du D glycéraldéhyde, un aldose triose. Les aldoses sont l une des deux familles d oses avec les cétoses. La fonction carbonyle est une fonction aldéhyde, et elle définit la position du premier carbone. Si le groupe c …   Wikipédia en Français

  • aldose — aldozė statusas T sritis chemija apibrėžtis Monosacharidas, turintis aldehido grupę. formulė Formulę žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. aldose rus. альдоза …   Chemijos terminų aiškinamasis žodynas

  • aldose — noun Etymology: International Scientific Vocabulary aldehyde + ose Date: 1894 a sugar containing in its acyclic form one aldehyde group per molecule …   New Collegiate Dictionary

  • Aldose — Aldosen (Polyhydroxyaldehyde) sind Monosaccharide, also Kohlenhydrate, die im Gegensatz zu den Ketosen ihre Carbonyl Funktion in terminaler, also endständiger, Position tragen. Durch den Vorsatz „Aldo “ wird die Zugehörigkeit zu den Aldosen… …   Deutsch Wikipedia

  • aldose — /al dohs/, n. Chem. a sugar containing the aldehyde group or its hemiacetal equivalent. [1890 95; ALD(EHYDE) + OSE2] * * * …   Universalium

  • aldose — noun Any of a class of monosaccharides having an aldehyde or hemiacetal functional group …   Wiktionary

  • aldose — A monosaccharide potentially containing the characteristic group of the aldehydes, CHO; a polyhydroxyaldehyde. a. mutarotase SYN: a. 1 epimerase. a. reductase polyol dehydrogenase (NADP+); an oxidoreductase that reversibly converts aldoses to… …   Medical dictionary