| http://www.w3.org/ns/prov#value | - In one embodiment, R1 is a bifunctional or multifunctional organic linker group such as alkyl, alkene, alkyne, alkoxyalkyl, alkylthioalkyl, alkoxy, saturated or unsaturated heterocycle that is substituted with at least one group capable of being crosslinked with or incorporated into a polymer, e.g., such groups as hydroxy, amino, carboxyl, vinyl, phosphate or phosphonate.
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