| http://www.w3.org/ns/prov#value | - It is particularly preferred that the pendant amine groups are incorporated by being part of chain-pendant aminoalkyl carboxylate groups of formula --C(O)--O--R1 --NH2 where R1 is an alkylene group, preferably of up to 20 carbon atoms, more preferably 2 or 3 carbon atoms.
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