Fig. 4
From: Efficient malic acid production from glycerol with Ustilago trichophora TZ1
Malic acid production of U. trichophora TZ1 cells in shake flasks with aqueous glycerol solutions. Cultures contained either 200 g L−1 glycerol buffered with 100 g L−1 CaCO3 (a), or 100 g L−1 glycerol buffered with 100 mM MES buffer (b, c). OD600 (circles), malic acid concentration (squares), glycerol concentration (diamonds), and pH-value (triangles). Error bars indicate deviation from the mean (n = 2)