| http://www.w3.org/ns/prov#value | - The preferred range for Cu and Mn is 2-5 times the reference value; for selenium it is about 1.5 times the reference value.The other components of table 1 are also preferred individually, i.e. the selection of a single component, e.g. riboflavin or manganese, forms a distinct embodiment of the invention.
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