| http://www.w3.org/ns/prov#value | - Examples of transition metal salts or anions that may be used include acetates, acetoacetates, sulfates of vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, nickel, copper, zinc, cadmium, silver or aluminum salts such as aluminum acetate, polyaluminum chloride, aluminum halides, mixtures thereof and the like. [00112] In some embodiments, the aggregate
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