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The effect of hydrodynamic stress derived from gas bubble dispersion and broth mixing on Dunaliella growth was examined by growing the algae in two different vessels; a Roux bottle and a miniloop reactor. It was found that Dunaliella cells were increasingly sensitive to high specific bubble rates at modified orifice Reynolds numbers between 9.9.10 4 to 18.8.10 4 and liquid motion with Reynolds numbers between 712 and 1293. The addition of carboxymethylcellulose and agar to the cultures served to protect the microorganisms from the effects of shear stress.
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Silva et al. (1987) studied this question.
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