| http://www.w3.org/ns/prov#value | - In another variation, the system oxidant/fuel ratio may be adjusted to allow the reactor atmosphere to be in a reducing condition overall, in another variation, nitrogen-based compounds serving as reducing or oxidizing agents including nitric acid, ammonia, ammonium nitrate, hydrazinc and hydroxylamine in quantities optimized according to the final product and metal nitrate solution concentration,
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