Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Top row shows fold changes in various elements relative to levels in filtered air control chambers for gestational (left column) and for two postnatal exposures (middle and right columns) following XRF analyses. Corresponding data in ng/m3 are depicted along the bottom row.
