| http://www.w3.org/ns/prov#value | - The action of the inventive cleaning agent was established in the following experiments: an aqueous dispersion containing 50 mg of titanium dioxide in the anatase modification with a mean primary particle size of 21 nm (the particle size was determined by transmission electron microscopy) per liter of dispersion was applied as cleaning agent in the outdoors field to various materials such as wood,
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