The present invention is generally related to plant genetic engineering. The second agent added with the polyvinylamine polymer can be, for instance, a polymeric anionic reactive compound or a polymeric aldehyde-functional compound. It similarly controls the emulators in response to information that it receives from various board-processing machines. The non-secure and secure information is then passed from the hub domain controller only to the local domain controller associated with the given partition at the hub domain controller on request. Profile height of the ribbon-connection is decreased and the density of ribbons and bonding sites can be increased compared to ribbon-connections employing bonding pads. By comparing the response signal with the reference value, a correction step such as a cleaning cycle can be performed when a limit value is exceeded or fallen short of.