| http://www.w3.org/ns/prov#value | - The minute polymer particles may, for example, be prepared from polysaccharides, such as dextran, cellulose, starch and pollulan and derivatives thereof (for example polysaccharides substituted by lower hydroxyalkyl groups) crosslinked by means of bridges with bonds of a covalent nature to a water-insoluble three-dimensional network, for example with the aid of bifunctional or trifunctional cross-
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