An enteral feeding unit or system that minimizes the occurrence of gastro-esophogeal-pharynegal reflux during feeding is described. A nanoparticle precursor is dispersed throughout the pores, and the nanoparticle precursor is responsive to a stimulus to form a catalytically active nanoparticle. The patient’s central nervous system blood is separated from the rest of the circulatory system and circulated and maintained at temperatures less drastically altered from normal temperatures by pumps and a heater and cooler. When the sliding rod is away from an open distal end of the housing in a first position, a hair graft can be placed into the spacing between an end of the rod and the open distal end of the housing. In this way, the turning-off time of the semiconductor device can be reduced considerably without being accompanied by an increase in turned-on resistance thereof.