Of particular note is the observation that younger children have inherently higher porphyrin concentrations, particularly of uro-, hepta-
, and coproporphyrins, which decline by as much as 2.
Apparent half-lives of hepta-
to deca-brominated diphenyl ethers in human serum as determined in occupationally exposed workers.
Neonatal exposure to higher brominated diphenyl ethers, hepta-
, octa-or nonabromodiphenyl ether, impairs spontaneous behaviour, and learning and memory functions of adult mice.
We used an HP6890 (gas chromatograph)--HP5973 (mass spectrometer) (Hewlett Packard) equipped with SP-2331 fused silica capillary column (60 pm internal diameter) to analyze tetra- to hexachlorinated PCDD/PCDFs, and a DB5 column (30 [micro]m internal diameter) to determine hepta-
and octachlorinated isomers.