A food service cart assembly having improved panel structures and an improved divider and tray arrangement to increase the thermal insulation efficiency of the assembly. The network includes at least three nodes and first and second wiring segments in a building for carrying the multiplexed data and digital telephone signals, and at least one of the segments is configured to additionally carry a power signal. The invention is directed to a method of silencing one or more endogenous plant host genes and a method of simultaneously silencing a plant host gene and expressing a foreign gene in a plant host. The entire vibrating assembly sits on a base and has a lid operated by a cable and counterweight for ease in loading the container for oscillation of the parts. The present invention also relates to a method of dispensing at least one air treatment agent. In accordance with the invention, a hydrodynamic stabilization bush having a stabilization surface is provided and formed between the first part rotor and the second part rotor such that a stabilization gap is formed before the stabilization surface so that a hydrodynamic stabilization layer is formed from a stabilization medium in the stabilization gap in the operating state.