Fig. 11. Fluorescence off–on response mode. An analyte at a concentration around its detection limit can produce a sharp contrast (compare the left two images).
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.