Electrical insulating paper according to an embodiment of the present invention is used while being immersed in electrical insulating oil, and includes a paper base material mainly containing cellulose, an adsorption layer formed on an entire surface of the paper base material by adsorption, and a moisture barrier layer formed by being chemically bonded to the adsorption layer. In one embodiment, one or more of R, R or R is a biologically active substance. The low dose used in the present invention prevents artery blockage while minimizing any negative side effects associated with the drug. The proxy transport server may apply a selection for an optimal store-and-forward transport server to which to route the email message. New packets are then assembled from the modified data, to produce a data-compressed output stream that can be subsequently processed in a conventional manner to reproduce the desired sound. The systems and methods are particularly useful for measuring p CO2 in coastal waters and other bodies of water where pCO2 can change rapidly and vary widely at sites that are in close proximity to each other.