A system for the sale of consumer goods, wherein the system comprises a device for providing a customer with a non-validated token that represents an article of merchandise. The method includes increasing the amount andor the activity of a DACT protein, or a functional fragment thereof, in the cell. When the vacuum section includes a gas and liquid contact chamber, the liquid containing a polymerization inhibitor may be supplied to the chamber. It also allows modification of active and \u201csoon to be active\u201d reservations, which in turn permit soft-state reservations. Under the retrofitting method, the at least one incandescent light source is removed, the second member is removed, and the second member is replaced with a beacon light module including at least one light emitting diode light source. The derivatization causes significant changes in the spectroscopic properties of the nanotubes.