Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2003.1247.1249Aspergillus niger Mutant UV-M9 on Semi-pilot Scale]]>RehmanAsad-ur- AliSikander Ikram-ul-Haq 122003614In the present investigation, the Aspergillus niger mutant UV-M9 was evaluated using phosphate limitations for enhanced citric acid production. Of the three phosphate sources, K2HPO4 was found to be the best yielding 75.25 gl-1 of anhydrous citric acid. The sugar consumption was 112.5 gl-1 while dry cell mass produced was 18.00 gl-1. The mycelia were small pellets.]]>Ranya, A.A., M.S. Osama and A.B. Mustafa,1999A. niger.]]>165760Prescott, S. and A. Dunns,19874th Edn.,pp: 710-715pp: 710-715Mattey, M. and A. Allan,1990Aspergillus niger.]]>1810201021Pera, L.M. and D.A. Callieri,1997Aspergillus niger.]]>42551556Benuzzi, D.A. and R.F. Segovia,1996Aspergillus niger strain.]]>61393397Papagianni, M., M. Mattey, M. Berovic and B. Kristiansen,1999Aspergillus niger morphology and citric acid production in submerged batch fermentation: Effects of culture, pH, phosphate and manganese levels.]]>37165172Tasun, K., P. Chose and K. Glien,197012921921Marrier, J.R. and M. Boulet,19584116831692Khan, M.A.A., M.M. Hussain, A. Khalique and M.A. Rahman,1970Aspergillus niger.]]>13439444Joseph, S.,19441944