A method for directing messages between a composite user interface and at least one source application. In some embodiments, the GPCR is mammalian, preferably human. Subsequently, the fraction after disproportionation containing methyltrichlorosilane is purified by distillation to separate high-purity trichlorosilane. One or more of the N switches are opened in response to either the forward current exceeding the forward current threshold or the backfeed current exceeding a backfeed current threshold.