PharmacokineticsIn all studied species (horse, dog, cattle and sheep) the pharmacokinetics of xylazine is best described by a 2-compartment model with a rapid distribution phase. The half-life of distribution is Â½-6 minutes and the half-life of elimination is 23-50 minutes, depending on species.
Polyester is a synthetic fiber derived from coal, air, water, and petroleum. Developed in a 20th-century laboratory, polyester fibers are formed from a chemical reaction between an acid and alcohol. In this reaction, two or more molecules combine to make a large molecule whose structure repeats throughout its length.
The first polyester fibers were produced by reacting ethylene glycol and either terephthalic acid or one of its esters to give poly(ethylene terephthalate). This polymer is still used to make thin films (Mylar) and textile fibers (Dacron and Fortrel).