| http://www.w3.org/ns/prov#value | - In accordance with the invention, inert carrier particles over which the hydrous oxide is deposited include known colloidally dispersed particles such as carbon; various types of silicas including synthetic calcined silicas (produced by heating with a flame), synthetic precipitated silicas (produced by chemical reaction), silicas of fossil origin (diatomaceous), detritic natural silicas (powdered
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