Figure 2.
(a) Response surface and (b) semiamplitude of the 95% confidence interval for Cr response. Factors Cr and Pb are reported in abscissa and ordinate respectively. Cd has been kept constant to the 0 level.
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.