Fig. 5

Ethanol production from A. platensis without organic nutrients, in the absence or presence of CaCl₂. Ethanol production with organic nutrients (blue triangle) or without organic nutrients (red circle) at 38 °C in the presence of CaCl₂ (solid line) and in the absence of CaCl₂ (dotted line). YE and P mean yeast extract and bacto peptone, respectively. The data for ethanol production with organic nutrients and CaCl₂ are the same as that in Fig. 4. The data for ethanol production with organic nutrients but without CaCl₂ are same as that in Fig. 1a. Error bars indicate the SD of three replicated experiments. For some data points, error bars obtained by three replications are smaller than the symbols