| http://www.w3.org/ns/prov#value | - Among the materials found useful for this purpose are natural surfactants such as saponin and synthetic materials such as poly(ethylene glycol) and a material commercially available from Olin Mathieson Company under the tradename Surfactant 10G. Other useful materials of this type include octyl phenoxy polyethoxy ethanols such as TX-100, TX-405, etc. commercially available from Rohm & Haas Company
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