| http://www.w3.org/ns/prov#value | - KOKAI Publication No. 56-63772, in which pores of a porous body are impregnated with a water-soluble polymer, such as polyvinyl alcohol or polyethylene glycol, and hydrophilicity is imparted to the porous body by, e.g., a heat treatment, acetal conversion, esterification, a dichromic acid treatment, or irradiation of ionizing radiation.
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