| http://www.w3.org/ns/prov#value | - When extrusion is used, a peptizing acid(s), such as nitric acid, acetic acid, citric acid or mixtures thereof, is added to the mixture and optional extrusion aids such as cellulose derivatives, e.g., METHOCEL??? F4M hydroxypropyl methylcellulose, are utilized (manufactured by The Dow Chemical Company).
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