| http://www.w3.org/ns/prov#value | - Further aims, characteristics and advantages of the present invention will be evident from the following detailed description and from the accompanying drawings, provided as a mere illustrative, non-limiting example, in which: FIG. 1 is a schematic perspective view of a portion of a porous alumina film; FIGS. 2-5 are schematic views showing some steps of a film-building process for an alumina film
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