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.
Transmission electron micrograph of calcifying nanoparticles cultured in vitro for four weeks. (A) Calcifying nanoparticles appear as oval-shaped particles with highly electron-dense shells. (B) Calcifying nanoparticles without shells.
Note: Bar indicates magnification of 200 nm.
