Fig. 3From: Aerobic-anaerobic transition boosts poly(3-hydroxybutyrate-co-3-hydroxyvalerate) synthesis in Rhodospirillum rubrum: the key role of carbon dioxideValidation of the experimental set-up. Seven different experimental conditions were tested. The factors manipulated to create a variety of conditions were the agitation (200 or 100 rpm), the filling volume (1/2 or 1/4), the gass interchange of the system with the environment (cotton or rubber plugs) and the presence or not of light. The experiment was carried out until the stationary phase of each condition. The PMmax production, final pH and biomass (mg·ml−1) were determined. Data is expressed as mean ± SD of triplicate determinations obtained from three independent experimentsBack to article page