| 释义 |
Definition of ester in English: esternoun ˈɛstəˈɛstər Chemistry An organic compound made by replacing the hydrogen of an acid by an alkyl or other organic group. Many naturally occurring fats and essential oils are esters of fatty acids. 〔化〕酯 Example sentencesExamples - The ester ethyl acetate can be produced using either an organic or inorganic acid.
- Fatty esters help replace natural esters missing from older, dryer skin types.
- Fatty acid methyl esters were analyzed by gas chromatography as described above.
- Glycerol esters are utilized in cakes, breads and other bakery products as lubricants and softening agents.
- Inside is a solution of an oxalate ester and a fluorescent dye, as well as a smaller glass tube that contains hydrogen peroxide.
Derivativesverbesterifying, esterifies, esterifiedɛˈstɛrɪfʌɪəˈstɛrəˌfaɪ [with object]Chemistry Convert into an organic compound by replacing the hydrogen of an acid by an alkyl or other organic group. fatty acids are reduced and esterified, yielding waxes Example sentencesExamples - In addition, unsaturated fatty acids esterified in lipids may also accept protons under anaerobic stress.
- Under normal physiologic conditions, the heart's preferred fuels are fatty acids, esterified as triglycerides and lactate.
- In that study it was postulated that the reduction of unsaturated fatty acids esterified in lipids was of no significance as a mechanism of plant adaptation to anaerobic conditions.
OriginMid 19th century: from German, probably from a blend of Essig 'vinegar' and Äther 'ether'. Rhymesarrester, Avesta, Chester, contester, Esther, fester, fiesta, Hester, investor, jester, Leicester, Lester, molester, Nestor, pester, polyester, protester, quester, semester, sequester, siesta, sou'wester, suggester, tester, trimester, vesta, zester Definition of ester in US English: esternounˈɛstərˈestər Chemistry An organic compound made by replacing the hydrogen of an acid by an alkyl or other organic group. Many naturally occurring fats and essential oils are esters of fatty acids. 〔化〕酯 Example sentencesExamples - Fatty acid methyl esters were analyzed by gas chromatography as described above.
- Fatty esters help replace natural esters missing from older, dryer skin types.
- The ester ethyl acetate can be produced using either an organic or inorganic acid.
- Inside is a solution of an oxalate ester and a fluorescent dye, as well as a smaller glass tube that contains hydrogen peroxide.
- Glycerol esters are utilized in cakes, breads and other bakery products as lubricants and softening agents.
OriginMid 19th century: from German, probably from a blend of Essig ‘vinegar’ and Äther ‘ether’. |