The reliability of any NOEL derived from this study should be considered questionable, owing to the presence of infection in all groups. Dogs of undetermined breed or source were given xylazine orally in gelatin capsules for 14-16 weeks at dose levels of 25, 50 or 100 mg/kg bw per day, 5 days/week. The low-dose group consisted of one male and one female, the mid-dose group of two males and the high-dose group of two males and two females.
POLYESTER FIBERS. Polyester fiber is a  manufactured fiber in which the fiber forming substance is any long chain synthetic polymer composed at least 85% by weight of an ester of a dihydric alcohol (HOROH) and terephthalic acid (p-HOOC-C6H4COOH) [3].dditional current U.S. Polyester Fiber Producers are: Acordis Industrial Fibers, Inc.; AlliedSignal Inc; Cookson Fibers, Inc.; KoSa; Intercontinental Polymers, Inc., Martin Color-Fi. Nan Ya Plastics Corp., Wellman, Inc. [24] Dramatic growth in PET fiber production is foreseen in Asia in the near future [22].
Polyurethane fibers are referred to as Spandex as a generic name. The fiber itself is highly stretch and elastic as rubber, strong than rubber, and resistant to aging. The fiber is dyeable freely and fine yarn can be produced. Polyurethane fiber is manufactured from glycol and diisocyanate as raw material with a special spinning method. No product is manufactured of 100% poly-urethane fiber. The polyurethane fiber is used by blending other fibers. A fabric, referred to two-way tricot in which a polyurethan fiber is knitted with a nylon or polyester filament yarn, is highly elastic both in wale- and course-way and is used for swimsuits, leotards, underwear and other similar stretchable clothing.