According to the invention, techniques for minimizing power consumption in optical disk drives. In determining a next-hop in a path from a source CE to a destination subnet, CE-to-CE costs are associated with each next-hop CE in a plurality of next-hop CEs. 5 and 50 mg of Zn2+ml of fermentation medium is fed during the fermentation. The encapsulation surrounds and encloses the securing region as well as the end portion of the head wire and extends below the securing face so that an undercut region axially below the collar is filled with the encapsulation to provide an improved tension relief between the head wire and the securing region.