| http://www.w3.org/ns/prov#value | - Preferably, the base matrix is characterized by: an initial average particle size ranging from about 10 to about 300 ??m, although passivated supports having narrow particle size ranges, such as about 15-20 ??m, about 15-25 ??m, about 30-45 ??m, about 50-60 ??m, about 80-100 ??m, and about 100-300 ??m, are most preferred.
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