Figure 4.
PCA analyses results. (a) Score plot, PC1 versus PC2 of all samples; (b) Score plot, PC1 versus PC2 of data from determinations used as variables.
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.