A paper medium having a bar code printed thereon is distributed to a viewer as a leaflet or the like. The rotating shutter has an open section extending in the axial direction of the roller-shaped main section as well as opened in the direction perpendicular to the axial direction thereof, opening and shutting the supply opening in conjunction with attachment and detachment operation of the developing tank. A tunable optical radiation beam is passed through the gas cell and the amount of energy absorbed by the specified component may be measured indirectly by taking the difference between the incident and emerging beam energy or directly by optoacoustic methods. A controller, external to the first and second bridges, accesses the configuration registers via the second bridge. Also disclosed are a mashing process, wherein mash is filtered and wort is obtained, and a process for the preparation of beer, as well as apparatuses and devices for performing one or more of these process. All samples, reagents, pipette tips and other tools or devices for processing nucleic acid samples may remain within the closed compartment provided by the container during processing.