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.
Image and spectrum of multi-color luminescence collected from onion cell layers after incubation with AgNO3. The excitation wavelength was at 473 nm provided by a laser diode operated at around 5 mW through a 100× oil immersion objective. The illuminated spot is ca. 10 µm2.
