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.
Fluorescence microscopic pictures of HeLa cells after incubation over 4 h with culture medium containing NaFl-loaded FTC-NPs and free NaFl. The fluorescence excitation was at 475 nm, and detection was at 523 nm. The respective phase contrast images are also shown. Scale bar = 50 μm.
