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单词 ester
释义
ester
noun[C]
chemistryspecialized
uk
/ˈes.tər/us
/ˈes.tɚ/
achemicalcompoundproducedby areactionbetween anacidand analcohol, in which thehydrogenof theacidhas beenreplacedby analkylgroupofatoms:
Simpleorganicsubstancessuch as esters,ketonesandacidscan beconvertedtohydrocarbonfuels.
Esters can havequiteapowerfulsweetsmell.
More examples
  • Nitroglycerine is thenitrateester ofglycerol.
  • Thesoycompound, a sterol ester, is a plant-basedcompoundused in margarines.
  • Cookingoilcan bebrokendown intoglycerineand methyl esters, thechemicalnameforbiodiesel, which canfueladieselengine.
  • Lanolin is amixtureof esters ofcholesterolwith stearic, palmitic, and oleicacids.
SMART Vocabulary: related words and phrases
Chemistry: types of chemical
  • acid salt
  • aerogel
  • alkali metal
  • alkaline
  • alkalinity
  • carbohydrate
  • dioxide
  • dioxin
  • inorganic
  • melamine
  • methyl orange
  • monomer
  • nitrogenous
  • NOx
  • pectin
  • propellant
  • reactant
  • saline
  • soluble
  • sulphide
See more results »
(Definition ofesterfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)
Examples from literature
  • These esters of the fatty acids give the characteristic savor to many of our favorite fruits, candies and beverages.
ester
noun[C]
chemistryspecialized
uk
/ˈes.tər/us
/ˈes.tɚ/
a sweet-smellingsubstancethat isproducedby areactionbetween anacidand analcohol
酯

ester| American Dictionary

ester
noun[C]
us/ˈes·tər/
chemistry
any of severalsubstancesproducedby areactionbetween anacidand analcohol
(Definition ofesterfrom theCambridge Academic Content Dictionary© Cambridge University Press)

Examplesofester

ester
The tissue was dried by grinding with anhydrous sodium sulfate and extracted with several volumes of hexane to remove carotenoids, retinols, and retinyl esters.
From theCambridge English Corpus
Lipid hydrolysis was also detected by measuring lipase activity with glycerolesteras substrate.
From theCambridge English Corpus
Using a photo fragmentation process that breaks anesterbond we demonstrate the system's ability to produce simple lipids (carboxyl acid).
From theCambridge English Corpus
The next system on the energy scale is an amideester.
From theCambridge English Corpus
Synthetic standard benzyl esters were prepared via the tetrabutylammonium salts on a preparative scale.
From theCambridge English Corpus
Phorbol esters stimulate macropinocytosis and solute flow through macrophages.
From theCambridge English Corpus
This gives the best resolution of methyl esters.
From theCambridge English Corpus
Isoform-specific tissue distribution and differential processing in response to phorbolester.
From theCambridge English Corpus
Raven determined that the platform could be redesigned as a flat panel in a vinylestercarbon composite.
From theCambridge English Corpus
Arachidonic acid is a common constituent of phospholipids in all membranes within a cell, cholesteryl esters and triglycerides.
From theCambridge English Corpus
The characterization of such minority modified gangliosides is complicated by the alkali lability of theestergroup.
From theCambridge English Corpus
Colocalization of 11-cis retinyl esters and retinylesterhydrolase activity in retinal pigment epithelium plasma membrane.
From theCambridge English Corpus
However, an analysis of pectin and pectin methyl esters in developing and maturing soybean seeds has not been reported.
From theCambridge English Corpus
The internal standard was calibrated against these and amounts of benzyl esters converted to amounts of acids trapped.
From theCambridge English Corpus
In addition, studies have shown that diterpenes and sugar esters produced by glandular trichomes are the main chemicals responsible for aphid resistance in tobacco.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/ester##
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更新时间：2024/12/28 1:47:43