[Preselection of Aspergillus niger strains for citric acid production].Acta Cient Venez. 1989; 40(3):195-7.AC
The aim of this work was to develop methods for the make a rapid selection of major Aspergillus niger strains in citric acid production. A relationship between culture appearance and productivity was established also, a solid medium was designed. This medium showed early a good level of citric acid production by assayed strains. The result obtained are confirmed by ordinary submerged culture.