The present disclosure provides for a bipolar plate assembly for use in a fuel cell stack. Additionally, provided are methods for the treatment of cancer, a neoplastic disease state andor a hyperproliferative disorder, and methods of inhibiting Heat Shock Protein 90. Rotary-kiln end-wall seals according to the invention should exhibit very low wear and tear if possible and have a service life that corresponds to the maintenance intervals of the rotary kiln as much as possible. If a match is found, an action associated with the least one identified sub-set is executed and the data structure is modified. The movement device moves the wipers at variable intervals in the movement direction, so that the wipers can wipe the nozzle plate surface independently from one another.