| http://www.w3.org/ns/prov#value | - In the range of pH from 1.7 to 3.3, the network is able to be retained by the filter having a pore size in the range from a 100,000 Daltons nominal molecular weight cut-off to 0.45 ??m, while proteins and other materials pass through the filter, thereby making it possible to separate hyaluronic acid from any soluble substances contained in the solution.
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