ester

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ester

 [es´ter]
a compound formed from an alcohol and an acid by removal of water.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

es·ter

(es'tĕr),
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.
Farlex Partner Medical Dictionary © Farlex 2012

es·ter

(es'tĕr)
An organic compound containing the grouping, -X(O)-O-R (X = carbon, sulfur, phosphorus; 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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

ester

a compound formed from an alcohol and an acid.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

es·ter

(es'tĕr)
An organic compound containing the grouping, -X(O)-O-R (X = carbon, sulfur, phosphorus; 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.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about ester

Q. Does anyone know an over the counter alternative to Lovaza, omega-3 acid ethyl esters? too expensive at Dr

A. there are all sort of companies that sell Omega-3, i buy from a company named Alsepa, but there are dozens of companies. but don't be tempted to buy a very cheap one, because they can be less purified.

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References in periodicals archive ?
Analysis and quantification of fatty acid methyl esters of transesterification reactions
Abbreviations AV: Acid value BDF: Biodiesel fuel FAME: Fatty acid methyl ester FFA: Free fatty acids GC-MS: Gas chromatography-mass spectrometry RT: Retention time WBF: Wastes of beef fats WFO: Wastes of frying oils.
Afterwards, the reaction mixture has been left to settle overnight so as to separate the mixture into 2 different layers: the upper layer being the methanol-water fraction and the bottom layer being the methyl ester. The mixture has been allowed to settle completely, and the bottom layer containing glycerol is removed.
The enantiomeric excess values of flurbiprofen and flurbiprofen methyl ester (ee) were determined by HPLC (Agilent 1200) by using a chiral column (Chiralcel OD-H, 5 [micro]m, 250 mm x 4.6 mm) capable of separating the R- and Sisomers of flurbiprofen and flurbiprofen methyl ester, and the mobile phase was hexane/isopropanol/trifluoroacetic acid solution (98:2:0.1, V/V/V), at a flow rate of 1.0 mL/min.
Algal oil was tested to identify the fatty acids methyl esters. Fatty acid methyl esters were prepared by saponification and esterification of lipid by standard IUPAC method.
Saturation fatty acid methyl esters increase the cloud point, cetane number and improve stability whereas more polyunsaturates reduce the cloud point and cetane number and stability.
(2005) found that reduction in HC emission was about 63% for methyl ester compared with Diesel.
The result showed that the components were formaldehyde, hydrazine, 1,2-dimethyl-, acetic acid, 2-isopropoxyethylamine, formic acid, acetic acid, phenol, benzaldehyde, 2-hydroxy-, phenol, 4-methyl-, benzoic acid, 2-furancarboxaldehyde, 5-(hydroxymethyl)-, methenamine, salicyl alcohol, phenol, 2,6-dimethoxy-, benzaldehyde, 3-hydroxy 4-methoxy-, phenol, 2-methoxy-4-(1-propenyl)-(e), ethanone, 1-(4-hydroxy-3-methoxyphenyl)-, phenol, 2,4-bis(1,1-dimethylethyl), benzeneacetic acid, 4-hydroxy-3-methoxy-, methyl ester, phenol, 2,6-dimethoxy-4-(2-propenyl)-, pentadecane, 2,6,10,14-tetramethyl, ethanol, 2-(dodecyloxy)-, phthalic acid, isobutyl nonyl ester, 1,4-dimethyl-8-isopropylidenetricyclo[5.3.0.0(4,10)]decane.
Certain fatty acids, for example benzoic acid, methyl ester; 1,4- benzenedicarboxylic acid, dimethyl ester and hexadecanoic acid, methyl ester appear to increase in both susceptible and tolerant progenies, but more so in tolerant progenies.