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.
(Left) PCA scores plot of chemical data of hop cones from 15 commercial varieties of H. lupulus L. cultivated in the Marche region. Cultivar identifiers are as in Table 1; (Right) PCA loadings plot of variables (volatiles and acids). Identifiers of chemical substances are as in Table 1 and Table 2.
