| http://www.w3.org/ns/prov#value | - The sulfate additive preferably has the general formula R1OS (=O)2 (OR2), wherein at least one of R1 and R2 is an organic group containing at least 3 carbon atoms and having an sp or sp2 hydridized carbon atom bonded to an sp3 hydridized carbon atom bonded to the oxygen atom bonded to the sulfur atom, or those were at least one of R1 and R2 is an unsaturated inorganic group.
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