| http://www.w3.org/ns/prov#value | - Exemplary materials which can find use include polysaccharides, e.g., cellulosic materials, such as paper, cellulose acetate, nitrocellulose, and backed nitrocellulose; inorganic materials, such as silica, deactivated alumina, diatomaceous earth, MgSO4 or other inorganic finely divided material substantially uniformly dispersed in a porous polymer matrix, with polymers such as vinyl chloride, viny
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