| http://www.w3.org/ns/prov#value | - The measured PCB concentration after birth C(t), can be described by the relationship: (1), where t is time, C(0)=C0 is PCB concentration at birth and ??C(t) is an increase of PCB concentration given by environment, mainly by breast feeding with a transfer rate Ibf and normal food intake with a transfer rate If (index bf means breast feeding and f food).Suppose that the principle of superposition
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