Fig. 4From: Water reuse and growth inhibition mechanisms for cultivation of microalga Euglena gracilisThe effect of self-secreted DOM on (a) Fv/Fm ratio, (b) paramylon content, and (c) TFA content of E. gracilis. TFA total fatty acid, HA humic acid. Double asterisk represents p < 0.01. The values represent mean ± SD, where n = 3Back to article page