Nutritional compositions containing selenium, colostrum and whey are described. In general overview, an exemplary system includes any number of the following: a delivery device, a sling assembly, guide members, and connectors that interconnect the above. A memory controller enables writing to and reading from the dual-bank RAMs during each of successive frame periods such that each bank of the dual-bank RAMs is read every given number of frame periods and is written every same given number of frame periods, and such that a read bank is contained in a different one of the dual-bank RAMs than is a write bank in each of the successive frame periods. An apparatus for preparing a foil from a green sheet using a radiation source is also disclosed. In operation, the portable reproducing device is operable to read the time-synchronized interleaved audio and video information recorded on the CD-DA, and process a signal representative thereof in an information processor.