Total cell mass increases exponentially with time.
Approximate and numerical solutions, for first-order kinetics, show that the total cell mass grows at half the specific rate of free cells when substrate diffusion is growth limiting.
This method was tested on environmental samples spiked, in a wide range of total cell mass, with the rarely occurring diatom Neidium affine together with a highly species-specific oligonucleotide designed on the small subunit (SSU) rRNA gene.
The results of Vero cell growth kinetic study showed a ~10 fold increase of total cell mass in iCELLis Nano and packed bed bioreactor systems and the increase in cell mass obtained was comparable with roller bottle system.
Then, 2 mL of 0.025 М CdSO4 and 500 μL of 0.5 M Na2S water solutions (Sigma-Aldrich, USA, 98%% purity) were poured into a 100-mL flask with BY-2 cells with total cell mass of 613 mg.
However, the ratio of starch consumption per total cell mass between the first and last cycles was 1 to 0.77, showing that major of the displayed α-amylase retained activity after 50 h.
Similarly, only 7 mM of the glycerol substrate was consumed in the REG-GB cultures by 120 h pi, but the total cell mass accumulation was 3.99 g/L (Fig. 2a).
In the REG-80 cultures, only 10 mM of the glycerol substrate was consumed by C. necator H16 by 120 h pi, resulting in a total cell mass accumulation of 2.82 g/L (Fig. 2a).
Isolated cells were plated down as a full-depth chondrocyte population (total cell mass from surface, mid and deep zones) or subjected to a fibronectin adhesion assay as described [33].
At pH 6 and 0.065 g/L iron, biofilm formation increased 4-fold for S. tokodaii and 10-fold for S. acidocaldarius which compared with normal levels reaching 63 and 83% of cells, respectively, in biofilm compared to the total cell mass (Table S1 and Fig. S2, E).
