| http://www.w3.org/ns/prov#value | - If the main component is an organic compound such as ascorbic acids and gallic acid, the promoter other than water or moisture and the swelling component is suitably selected from alkali agents, for example, alkali metal or alkaline earth metal compounds such as sodium carbonate; transition metal catalysts such as iron salts, manganese salts, copper salts and cobalt salts; reaction accelerators su
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