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Bioresources and Bioprocessing
Fig. 2 | Bioresources and Bioprocessing

Fig. 2

From: Influence of light absorption rate on the astaxanthin production by the microalga Haematococcus pluvialis during nitrogen starvation

Fig. 2

The 1-L airlift PBR (a) and the morphological changes (b and c) of H. pluvialis cells for an initial biomass concentration \({\mathrm{C}}_{{\mathrm{x}}_{0}}\) of 0.21 kg m−3 under nitrogen starvation and PFD of 250 µmolhν m−2 s−1 at day 1 (b) and day 10 (c) of culture. The damaged or bleaching cells are indicated by arrows. Scale bar: 200 µm

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