| http://www.w3.org/ns/prov#value | - In one such application, silica or other insulating powder is deposited in sub-micron form on a polyurethane or other suitable organic foam, the oxidizable material is removed by heating in the presence of air and the refractory framework remaining is immersed in a palladium nitrate solution, after which the impregnated framework is heated and the palladium nitrate is calcined to palladium oxide,
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