| http://www.w3.org/ns/prov#value | - Those reactive groups which may be mentioned as representative are a carboxyl group (--COOH), a sulfo group (--SO3 H), an ethylene imino group ##STR1## (wherein R1 and R2 each represent a hydrogen atom or an alkyl group such as a methyl group and the like)], an isocyanate group (OCN--),
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