Compositions comprising CF3CClFCH2OH, CF3CClFCH2OZnCl, and CF3CClFCH2OCCH3 are useful in processes to make HFO-1234yf. The invention provides a biocompatible nonerodible polymeric device which releases dopamine agonist continuously with generally linear release kinetics for extended periods of time. This agent is capable of forming a coating with satisfactory scale prevention properties on inner wall surfaces of a polymerization vessel with a single-stage application, enabling the production process time to be shortened and the productivity and quality of polymeric products improved. The first connecting element and the part form a releasable connection. Each of the rails includes a plurality of threaded holes which can be used to attach cargo items using threaded fasteners. The forced degradation is accomplished by applying a voltage or current to the BJT for a specific time to the reversed biased base-emitter junction, allowing a significant degradation of the junction without destroying it.