A large capacity HDD is handled as a portable recording medium. The composition comprises an Al salt as a first therapeutically active component; a Mg-containing material as a second therapeutically active component; and a polysulfonated or polyphosphorylated carbohydrate-containing composition, as a third therapeutically active component. Also disclosed are solvent-based compositions for forming an inkjet-receptive coating on a substrate comprising: a vinyl lactam polymer or copolymer; a solvent; optionally, a pigment; and polymer resin diluent. Other embodiments provide for simultaneous hydrogen oxidation and nitrogen reduction at the same electrode, which in turn react for formation of ammonia.