Figure 2.
Response surface plots for the interaction of different factors. (a) R134a‐butane ratio and extraction time; (b) R134a‐butane ratio and extraction temperature; (c) extraction time and extraction temperature
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.