ester


ester
An organic compound containing the grouping, –X(O)–O–R (X = carbon, sulfur, phosphorus, etc.; R = radical of an alcohol), formed by the elimination of H2O between the –OH of an acid group and the –OH of an alcohol group; usually written as in ethyl acetate (from acetic acid and ethyl alcohol), CH3CO—OC2H5 or CH3COOC2H5.
- carboxylic acid e. specifically, an e. derived from a carboxylic acid and an alcohol; R—CO—R′
- Cori e. SYN: d- glucose 1-phosphate.
- Embden e. hexose phosphate; a mixture of d-glucose 6-phosphate and d-fructose 6-phosphate; significant in the understanding of sugar metabolism.
- Harden-Young e. d-fructose 1,6-bisphosphate; important intermediate in sugar metabolism.
- Neuberg e. SYN: fructose 6-phosphate.
- Robison-Embden e. SYN: d- glucose 6-phosphate.
- sugar e. e. of a sugar with an organic or inorganic acid; E.G., d-glucose 6-phosphate.
- thiol e. an e. formed from a carboxylic acid and a thiol ( i.e., RCO—SR′), e.g., acetyl-coenzyme A.

* * *

es·ter 'es-tər n any of a class of often fragrant compounds that can be represented by the formula RCOOR' and that are usu. formed by the reaction between an acid and an alcohol usu. with elimination of water

* * *

es·ter (esґtər) a compound formed by removal of water from an acid and an alcohol, e.g., carboxylic acid esters, ROCOR′, and phosphoric acid esters (organic phosphates), RPO42; esters are named as if they were salts of the parent acid, e.g., methyl acetate, glucose 6-phosphate.

Medical dictionary. 2011.

Look at other dictionaries:

  • Ester — Carbonsäureester Monoester der Phosphorsäure …   Deutsch Wikipedia

  • ester — ESTÉR, esteri, s.m. Combinaţie organică rezultată prin eliminarea unei molecule de apă între un alcool şi un acid organic sau un acid anorganic oxigenat. – Din fr. ester. Trimis de LauraGellner, 13.06.2004. Sursa: DEX 98  estér s. m., pl. estéri …   Dicționar Român

  • Ester — Sm (chemische Verbindung, die aus Säuren und Alkohol unter Wasseraustritt entsteht) per. Wortschatz fach. (19. Jh.) Kunstbildung. In J. Liebigs Gießener Laboratorium entstanden als Verschmelzung aus Essig und Äther.    Ebenso nndl. ester, ne.… …   Etymologisches Wörterbuch der deutschen sprache

  • Ester — Saltar a navegación, búsqueda Ester puede referirse a: Esther es una variante del nombre Ester. Éster, compuesto químico. Libro de Ester, libro del Antiguo Testamento. Obtenido de Ester Categoría: Wikipedia:Desambiguación …   Wikipedia Español

  • ester — Ester, il vient de Stare. Personne capable d ester en jugement, Persona iusta petitoris aut defensoris. B. Ne pouvoir ester en jugement, Personam iudicialem non habere. B. Mineur de XXV. ans ne peut ester en jugement sans curateur, Minor annis… …   Thresor de la langue françoyse

  • Ester — Ester, AK U.S. Census Designated Place in Alaska Population (2000): 1680 Housing Units (2000): 814 Land area (2000): 64.628190 sq. miles (167.386237 sq. km) Water area (2000): 0.051043 sq. miles (0.132201 sq. km) Total area (2000): 64.679233 sq.… …   StarDict's U.S. Gazetteer Places

  • Ester, AK — U.S. Census Designated Place in Alaska Population (2000): 1680 Housing Units (2000): 814 Land area (2000): 64.628190 sq. miles (167.386237 sq. km) Water area (2000): 0.051043 sq. miles (0.132201 sq. km) Total area (2000): 64.679233 sq. miles (167 …   StarDict's U.S. Gazetteer Places

  • éster — ‘Compuesto orgánico que resulta de sustituir un átomo de hidrógeno por un radical alcohólico’. Es voz llana, por lo que no se considera válida la grafía sin tilde ⊕ ester ni la pronunciación aguda que le corresponde: ⊕ [estér]. Su plural es… …   Diccionario panhispánico de dudas

  • ester — o éster (Del al. Ester). m. Quím. Compuesto orgánico que resulta de sustituir un átomo de hidrógeno de un ácido por un radical alcohólico. Las grasas son esteres de la glicerina con ácidos grasos …   Diccionario de la lengua española

  • éster — ester o éster (Del al. Ester). m. Quím. Compuesto orgánico que resulta de sustituir un átomo de hidrógeno de un ácido por un radical alcohólico. Las grasas son esteres de la glicerina con ácidos grasos …   Diccionario de la lengua española

  • ester — [es′tər] n. [Ger, contr. < essigäther < essig, vinegar (< L acetum: see ACETO ) + äther (< L aether), ETHER] an organic compound, comparable to an inorganic salt: generally, HR (inorganic acid) +R1OH (alcohol) = RR1 (ester) + H2O… …   English World dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.