| http://www.w3.org/ns/prov#value | - That is, the ionic medicine-containing layer can be exemplified by a solution itself, obtained by dissolving an ionic medicine in a solvent such as water, ethanol or the like; and a layer obtained by impregnating this solution into a gel of a polyvinyl alcohol, a polyvinyl pyrrolidone or the like, a porous membrane, a gauze, a paper or the like.
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