Abstract: A preparation system for preparing a cell suspension having a carrier on which a reactor housing and a magnet system are accommodated, wherein, in the reactor housing, a reaction channel is formed, which extends between an inlet opening arranged centrally on an upper side of the reactor housing and an outlet opening arranged on the outside of the reactor housing and which is bounded by a channel wall, the magnet system being received on the carrier so as to be relatively movable between a first functional position, to bear with a pole face against the channel wall of the reaction channel and a second functional position to assume with the pole face a predetermined distance relative to the channel wall, and having a reactor housing drive for initiating a rotational movement on the reactor housing.

Abstract: A YZ-latch for holding down a piece of freight on a loading floor in an aircraft which has a base holding an axle stub which in turn has mounted thereon two rollers for rolling contact with the freight piece. One roller holds against lateral displacement in the Y-direction. The other roller holds against vertical displacement in the Z-direction. Free movement is permitted in the X-direction. Either the axle stub with fixed rollers is rotatable, or the rollers are rotatable on the fixed axle stub, or at least one roller or both rollers are rotatable on a rotatable axle stub.