Fig. 2

Cellular and hydrogen productivities versus hydrogen partial pressure. Productivities of T. maritima cells (Qcells) were expressed in mg per liter of medium and per hour. Glucose consumption rates (Qglu) were expressed in mmol per liter of medium and per hour. These fermentation parameters were calculated during the growth phase from fermentation runs performed in bioreactor (in triplicate). For all fermentations, culture medium contained glucose (60 mmol L⁻¹) and yeast extract (1 g L⁻¹)