Abstract: A modified silica material which comprises silica covalently bonded to a synthetic polymer, the synthetic polymer being made from (a) a polymerizable compound capable of being covalently coupled directly to said silica, and (b) one or more polymerizable compounds containing (i) an ionizable chemical group, (ii) a chemical group capable of transformation to an ionizable chemical group, (iii) a chemical group capable of causing the covalent coupling of the compound (b) to an affinity ligand or a biologically active molecule or (iv) a hydrophobic compound.

Abstract: A modified polypeptide material comprising an insoluble polypeptide carrier and synthetic polymer, the synthetic polymer made from (a) a polymerizable compound which has a chemical group capable of covalent coupling to the insoluble polypeptide carrier and (b) one or more polymerizable compounds containing an ionizable chemical group, a chemical group capable of transformation to an ionizable chemical group, a group capable of causing the covalent coupling of the synthetic polymer to an affinity ligand or a biologically active molecule, or a hydrophobic chemical group. The synthetic polymer is covalently bonded to the insoluble polypeptide carrier.