- 1酯(化學用詞)
In chemistry, a type of compound formed when an acid reacts with an alcohol. Many esters have a pleasant, fruity smell, which is why they're often used in perfumes and artificial flavorings.
core核心畫面
組成This word was created by German chemists in the 1800s, probably by shortening a longer German word for a related chemical. It does not split into clear English pieces.
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Estername
- 1
A female given name from Hebrew, alternative form of Esther.
esternoun/ˈɛstɚ/
- 1
chemistrynatural-sciencesorganic-chemistryA compound most often formed by the condensation of an alcohol and an acid, with elimination of water, which contains the functional group carbon-oxygen double bond (i.e., carbonyl) joined via carbon to another oxygen atom.
- To produce a test material containing at least 75 percent omega-3 polyunsaturates, the menhaden triglycerides are transesterified to produce fatty acid ethyl esters. The esters are reacted with urea dissolved in hot ethanol and the solution is cooled overnight.
- The thiol-coenzyme-A ester formed by R-arylpropionic acid can bind to triglyceride to form a “hybrid” triglyceride: such hybrid triglycerides can cause alteration of fatty-acid metabolism and membrane function, and a lipophilic triglyceride–propionic-acid hybrid would be able to cross lipid membranes such as the blood–brain barrier.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。