The invention relates to a medical x-ray imaging apparatus which includes a support construction supporting a substantially ring-shaped structure, an O-arm, which in turn supports imaging means and which O-arm is arranged with an examination opening. The icemaker assembly comprises a conveyor assembly positioned within the freezer compartment having a flexible conveyor belt with a multiplicity of individual ice cube molds for creation of individual ice cubes. A flow field communicates reactant in a flow direction across the separator plate. The process may further comprise a salt exchanging step, wherein another acid is added to the chiral 3-amino nitrile salt or the enantiomerically enriched 3-amino nitrile salt to produce another 3-amino nitrile salt. 5dec-3-en-4-yl butanoate for controlling acarids in hops, kiwi fruit, soft fruit, nuts, coffee, tropical fruit, spices and conifers. An angle formed by the inner surface of the hood and the front surface of the simple barrier measures about 10 degrees to about 80 degrees, such that a channel having a substantially V-shaped cross section is formed.