Methods and systems for the negotiation of a population of RFID tags with improved security is provided. The drive transmission member includes an engaging part that engages a first rotary body provided within a unit detachably attachable to an image forming apparatus and a gear part that engages a motor gear attached to the at least one drive source. The invention additionally provides a method for producing 6-aminocaproic acid, caprolactam, hexametheylenediamine or levulinic acid. Each layer of dielectric material has a thickness that is an integral number of half-waves of the centre wavelength.