| http://www.w3.org/ns/prov#value | - Independently, neither of these materials is required in the present composition,however, the combination of all nutrient sources, including the cellulose, starch and any other nutrients that are present, is at least 1%.An anti-microbial agent or biocide, such as zinc pyrithione, is also added to either the panel core or to the coatings applied to the panel or both.
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