| http://www.w3.org/ns/prov#value | - The dispersion force was tested by a method including mixing 50 mg of finely divided, hardly dispersable, copper phthalocyanine blue with 20 ml of 0% aqueous solution of rhamnolipid B with agitation, allowing the dispersion to quiescently stand for 4 hours, collecting an upper liquid of the dispersion, diluting the collected liquid with water to a concentration 13.5 times that of the undiluted liq
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