This invention allows the communication of mission critical data to devices that communicate within the same, or a separately connected, power distribution system. The ion milling process is controlled for each material type to maintain a planar surface with minimal damage to the exposed materials. This enables downstream algorithms to read only the data for the bit plane of interest. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device. Production host cells and oils produced by the methods of the invention are also claimed. Particulate DRA may be produced at a size of about 500 microns or less.