highly significantp < 0.005
It is clear that the nitrate concentration has a very important influence on lipids production, since both simple and quadratic terms of [NaNO 3 ] are highly significant (Table 5 , p < 0.005).
It is clear that the nitrate concentration has a very important influence on lipids production, since both simple and quadratic terms of [NaNO 3 ] are highly significant (Table 5 , p < 0.005).