B. Kovac et P. Raspor, THE EFFECT OF UREA ON GROWTH OF MOLDS AND BIOMASS YIELD IN SOLID-STATE CULTIVATION, World journal of microbiology & biotechnology, 11(3), 1995, pp. 345-346
Urea, added at 2 to 20 mg/g in solid bran medium supporting growth of
Aspergillus oryzae and Rhizopus oligosporus, led to a higher concentra
tion of NH4+ and pH but a decrease in biomass production.