A method for preparing cracking catalyst. In addition, the gaseous component that is unnecessary for the discharge operation is exhausted by setting the temperature of the amorphous sealing glass to exceed its softening-point and be no more than its working point. In addition, statements concerning interactions of substances with lipid membranes respective of materials bonded thereon or therein respective of signal transduction mechanisms connected thereto are possible. The distributor plate can be separable from the system or openable to provide access for removal of obstructions and for maintenance.