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.
Principal component analysis (PCA) of PCB congener profiles in different soil layers of AMF-inoculated treatments and the control after 40 days of Cucurbita pepo L. growth. Samples were represented by open symbols while PCB congeners by solid asterisks. Numbers beside asterisks represent IUPAC congeners.
