| http://www.w3.org/ns/prov#value | - The core fluid may be a gas, such as nitrogen, air, carbon dioxide, or other inert gas, or a liquid which is a non-solvent for the polysulfone compound, such as, but not limited to, water, poly(ethylene glycol), di(ethylene glycol), tri(ethylene glycol), glycerol, and mixtures thereof Mixtures of solvents and non-solvents may be used as long as the mixture is not a solvent for the polysulfone comp
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