A flare-up preventing grill is an apparatus which is useful for preventing and extinguishing flare-ups which occur while grilling. The present disclosure provides methods that a seller can define which products want to make available and at what price, and how a seller want to control access for shoppers. To detect phosphorylation a \u03b2-galactosidase substrate is added to the cells, whereby product formation indicates the occurrence of phosphorylation. The cathode scraper system also includes a cathode scraper assembly configured to remove purified uranium deposited on the plurality of cathode rods. The tube-like member is open at each end and has a pocket 18 at one end of the tube-like member adapted to receive the assembly when stuffed therein to thereby constitute a carry bag or the like for the assembly when not in use.