| http://www.w3.org/ns/prov#value | - B, and lanthanide and actinide series of metals of the Periodic Table, and n is an integer equal to the valence of M, wherein said monomer is an ethylenically unsaturated hydrocarbon, an ethylenically unsaturated hydrocarbon and having an oxygen or nitrogen atom attached to one of the carbon atoms of a carbonto-carbon double bond or is polymerizable by ring opening of cyclic groups containing a he
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