Authors have studied on the application of surface-active agents (surfactants) in O. A. method at the suggestion of Murata, one of them since 1978.
They, in this report, have made clear up the effects of surfactants in O. A. method. Out of many ones, some surfactants, such as amide type, sulfate type, quaternary ammonium type, and so on, have been found out to have an effect to reduce pettetizing time.
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