The various preparations of insulin available for prescription vary in onset, intensity, and duration of action. Animal source insulins, pork and beef, have been discontinued in the U.S. market. Human insulin is derived by recombinant DNA technology and is termed quick acting, intermediate acting, or long acting.
The pole lathe was invented sometime before the 13th century AD. Although it represented a great advance the pole lathe was not that much more complicated than its predecessors. The differences consisted of a framework to raise the bed of the lathe clear of the ground, the addition of a pole and a treadle.
The basic turning lathe is:a. the turret latheb. the automatic lathec. the engine lathed. the swiss type lathe4. Forming on a lathe is accomplished by:a. specially shaped cutting toolsb. compound rest travelc. rotating fixturesd. by cutting grooves and chamfers5.