Increased stability of derivitization agents on the surfaces of packing material used in choromatography is described. Zeolite A with particle sizes of \u02dc150 nm was made by transformation of the amorphous precursor in 4NOH solution with Zeolite A seeding. The method further can include establishing negotiations over the network between the first and second parties in order to complete a desired transaction, wherein the transaction is only authorized to proceed if at least one of the parties receives certain predetermined credentials from the other party. Each strut has a plurality of plate-shaped elements, with friction spacing elements between adjacent elements. Alternatively, an initial charge may be applied to the media sheet at an image transfer station, without transferring a toner image to the sheet, and returning the sheet via a duplex path to positioned upstream of an image transfer station prior to an image transfer operation.