| http://www.w3.org/ns/prov#value | - Referring now to FIG. 4, there is shown a portion 60 of a diffusive dam made from relatively non-reactive, porous material such as fiberglass, cellulose, polysullfone, NYLON brand material, polyethylene, NOVYLON brand material, POREX CHEMISTRY K brand material, POREX CHEMISTRY A brand material, FILTRONA brand material, and the like, all commercially available.
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