| http://www.w3.org/ns/prov#value | - Preferably the hydrophilic matrix-forming material can be made from naturally occuring polysaccharides, such as alginates, chitosans, gums, agars, carrageenans, or the matrix can be made synthetic, water soluble monomers, oligomers or polymers, such as, for example, polyvinyl alcohol, poly(N-isoproylacrylamide), acrylamides, acrylates, and methacrylates, or combinations thereof.
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