Antimicrobial system which comprises a cationic surfactant, derived from the condensation of fatty acids and esterified dibasic amino acids, according to the following formula, where: X is Br, Cl or HSO4R1: is linear alkyl chain from an saturated fatty acid, or hydroxyacid from 8 to 14 atoms of carbon bonded to the \u03b1-amino acid group through amidic bond. The output voltage is tapped from the voltage-limiting element. The amplifier comprises a buffer amplifier that receives the differential input voltage and produces a differential input current. The internal layers of a multi-layered component can also be removable, or a multi-layered component can be configured to allow additional layers to be inserted. One of the members has a wall part that restricts the cross-section of the flow passage of the one member and defines a toner outflow opening. The joint restraint assembly reliably accommodates comparatively high levels of mechanical loading andor pipe internal pressure, and does so without relying upon the limited force produced by the threaded bolt pre-load on the segments at the time of assembly.