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.
Geographic distribution of article downloads for ACS Omega is shown (blue circles). The size of the circle corresponds to the number of downloads from that particular location. The city of Beijing is labeled with >65,000 downloads to indicate scale.
