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.
Yellow alga with corresponding Raman spectra resulting from 532 nm excitation. (A) Fluid inclusion containing yellow alga (see arrow), illuminated with transmitted plane light. (B) Raman spectra of yellow alga in (A) show three peaks at 1013, 1157, and 1525 cm−1, indicating beta-carotene.
