| http://www.w3.org/ns/prov#value | - For example, acrylonitrile, acrylamide, methacrylamide, styrene, saturated or unsaturated polyethylene, cellulose, styrene sulfonic acid, methacrylic sulfonic acid, or metallic salt thereof may be used. [0033] The polycarboxylic acid polymer having a structure below may be used for one example. [0034] Where R1, R2 and R3 represents hydrogen atom or substituent group such as alkyl group, and R4 rep
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