Figure 2

Comparative biomass and astaxanthin yields in strains MK19, CS19, and CSR19 during flask fermentation for 120 h. a Dry weights and OD₆₀₀ values for the three strains. Cell dry weights were determined by centrifuging 20 mL broth at 12,000×g, rinsing with distilled water, and drying at 105°C to a constant weight (~10 h). Dry weights were 25.8 g/L for CSR19, 21.2 g/L for CS19, and 18.9 g/L for MK19. b. Astaxanthin yields (values shown are means of three individual cultures) were 25.3 mg/L for CSR19 and 21.2 mg/L for CS19 (33.5 and 11.8% higher than the value for MK19). Error bars SD from three independent biological replicate experiments.