A nutritional, cosmetic or pharmaceutical formulation comprising esters of polyethylene glycol in which the polyethylene glycol chain is terminated at one end by a polyunsaturated fatty acyl group, preferably C18-C22 and at the other end by a C1-C4 alkyl group, preferably a methyl group. In one embodiment, the present invention provides a bandwidth management device that periodically queries routing systems associated with access links, conceptually grouped into a virtual access link, to monitor that load of the access links and, depending on the detected load, adjust the configuration of the bandwidth management device to avoid overloading one or more of the access links. In another embodiment, sliders are inserted on to zippered packages output from a form-fill-seal machine or the like. The liquid in the peripheral section can be a glow-in-the-dark type liquid. Accordingly, the pattern widths of the layer can be made uniform over an entire wafer. Pre-filtering is applied to the said first signal before its emission so as to attenuate the power of the said first signal in at least a first portion of the said first frequency band, adjacent to the said second frequency band.