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Table 4 Population growth of Nannochloropsis sp. on the flashing light treatment

From: Enhanced biomass productivity of microalgae Nannochloropsis sp. in an airlift photobioreactor using low-frequency flashing light with blue LED

Day Flashing light (light:dark)
Control (natural photoperiodism) P1 (0.75:0.25 h) P2 (0.5:0.5 h) P3 (0.25:0.75 h)
Cell density (106 cells/mL) Specific growth rate (μ) (per day) Cell density (106 cells/mL) Specific growth rate (μ) (per day) Cell density (106 cells/mL) Specific growth rate (μ) (per day) Cell density (106 cells/mL) Specific growth rate (μ) (per day)
0 1 0 1 0 1 0 1 0
1 1.03 ± 0.25 0.03 1.75 ± 0.07 0.55 1.3 ± 0.08 0.26 1.46 ± 0.08 0.38
2 1.46 ± 0.21 0.19 2 ± 0.35 0.34 1.45 ± 0.21 0.18 0.81 ± 0.07 −0.1
3 1.93 ± 0.23 0.21 2.35 ± 0.22 0.28 2 ± 0.15 0.23 0.81 ± 0.07 −0.06
4 2.46 ± 0.21 0.22 4.8 ± 0.40 0.39 2.3 ± 0.30 0.2 0.76 ± 0.20 −0.06
5 3.11 ± 0.07 0.22 6.1 ± 0.51 0.36 3.1 ± 0.25 0.22 0.75 ± 0.02 −0.05
6 3.6 ± 0.13 0.21 7.98 ± 0.05 0.34 4 ± 0.09 0.23 0.55 ± 0.13 −0.09
7 3.66 ± 0.35 0.18 12.34 ± 0.02 0.35 6.8 ± 0.06 0.27 0.55 ± 0.10 −0.08
8 4.08 ± 1.63 0.17 15.4 ± 0.23 0.34 7.5 ± 0.16 0.25 0.45 ± 0.10 −0.09
9 4.63 ± 0.51 0.17 16.5 ± 0.02 0.31 8 ± 0.06 0.23 0.5 ± 0.13 −0.07
10 4.61 ± 0.42 0.15 16.8 ± 0.14 0.28 9.5 ± 0.10 0.22 0.63 ± 0.05 −0.04
11 4.7 ± 0.43 0.14 17 ± 0.28 0.25 9.9 ± 0.19 0.2 0.55 ± 0.10 −0.05
12 4.51 ± 0.25 0.12 17 ± 0.02 0.23 10 ± 0.05 0.19 0.26 ± 0.10 −0.11