| http://www.w3.org/ns/prov#value | - Examples of surface active agents which can be used in the method of the prevent invention are natural surface active agents such as saponin, etc., nonionic surface active agents such as alkylene oxides, glycerin compounds, glycidol compounds, etc., cationic surface active agents such as higher alkylamines, quaternary ammonium salts, pyridine and other heterocyclic compounds, phophonium or sulfoni
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