Fig. 2From: The synergistic effect of Selenium (selenite, –SeO3 2−) dose and irradiance intensity in Chlorella culturesChanges in the biomass density (DW) of the Chlorella cultures treated with various Se doses (2.5, 8.5 and 25 mg Se per g of DW): a with addition of various Se concentrations at 250 μmol photon m−2 s−1; b with addition of 16 mg g−1 selenium exposed to various light intensities (250, 500 and 750 µmol photons m−2 s−1) during cultivation period of 72 h (control—no Se added)Back to article page