Ester

Definitions

1. A female given name from Hebrew, alternative form of Esther.
2. A 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.

Equivalents

Examples

“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.”

“The effort’s primary material systems are vinyl esters and polyurethanes, reinforced with inexpensive chopped-glass rovings. Automated glass-fiber preforming processes and high-rate molding procedures are being studied in an effort to reduce⟳ cycle times and production costs substantially.”

CEFR level