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.
The 3D response surface and 2D contour plots of the (a) process yield and the retentions of (b) total saponin content (TSC); (c) total phenolic content (TPC); (d) total flavonoid content (TFC) and (e) total antioxidant activity (TAA) in response to concentration (X1) and ratio (X2).
