| http://www.w3.org/ns/prov#value | - Specific examples of water-soluble high-molecular compounds preferably usable in the present invention include polyacrylamide, polyvinyl pyrrolidone, water-soluble celluloses such as carboxymethyl cellulose, hydroxymethyl cellulose and hydroxypropyl cellulose, poly(vinyl methyl ether), polyvinyl acetal, and polyvinyl alcohol.
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