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.
(A) Graphical analysis for pH change in coffee bean extract on the roasting degree. The pH of green coffee bean extract ranges from 6.3 to 6.5, depending on the water used. (B) Schematic diagram of the structural change of chlorogenic acid (caffeoylquinic acid) according to roasting.
