Abstract
This paper deals with the effect of regulating the pH of culture medium for Eremothecium ashbyii on its growth and riboflavin production. In the glucose-ammonium sulphate medium supplemented with corn steep liquor (pH 5.4 the riboflavin production and the growth of the fungi were about 30 per cent greater when the pH of the medium was adjusted to 7.0 at the middle stage of cultivation than when it was not adjusted. In the glucose-peptone medium, the amount of riboflavin produced in the case of adjusting pH to 6.0 during cultivation increased about 20% in comparison with that in the case of not adjusting pH.
