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.
Mean (± standard deviation, n = 3) cell density of 12 Skeletonema marinoi treatments over 22 days in 250 mL cultures. Sample key: NP = Non-PUA-producing S. marinoi; P = PUA-producing S. marinoi; SN = Standard nitrogen relative to f/2 medium (8.82 × 10−4 M); HN = Halved nitrogen (4.41 × 10−4 M); DN = Double nitrogen (17.64 × 10−4 M); S = PUA spiked.
