Apparatus and associated systems and methods may include one or more features for high speed transmission line structures that may substantially reduce signal degradation due to effects, such as dielectric loss, parasitic capacitance, cross-talk, andor reflections. The preferred compounds are aminoglycoside antibiotics, e. A die is coupled to the substrate. Depending on the type of contaminant, the composition components are each varied from 10 to 80 parts by volume, with the total composition limited to 100 parts by volume. When charging the capacitive electronic part has progressed sufficiently, the switch is controlled to open. Compounds of formula are useful as therapeutic agents.