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. 2023 Oct 31;23(21):8865. doi: 10.3390/s23218865

Figure 8.

Figure 8

pH measurements with the dual-layer pH sensor (●) in the Ulva sp. DBL and the pH electrode (○) in bulk seawater after undisturbed periods of (a) 12 h and (b) 3 days, respectively. Shaded areas indicate periods of light off.