The present invention provides compositions that are capable of being dispersed in a target medium. According to one embodiment, a trader may configure a plurality of filters, each including at least one filter criteria and filter condition. A transverse drum is also provided and is rotatably disposed in the longitudinal drum as is a set screw for fixing the position of the transverse drum with respect to the longitudinal drum. The dispenser is provided with apparatus for preventing formation of a residual liquid film after termination of the jet flow spray which would otherwise clog the nozzle. By measuring and distinguishing each of the pulses in the signal, the illumination of the scan beam can be synchronized with the rotation of the polygon mirror to only generate a desired number of scan line patterns that is less than the full complement of the scan line patterns capable of being generated by the multi-scan line scanner. As the solid catalyst, activated carbon or the like can be used.