Oxalic acid production from lipids by a mutant of Aspergillus niger at different pH.
Crude rapeseed oil and post-refining fatty acids were used as substrates for oxalic acid production by a mutant of Aspergillus niger. Both the final concentration and the yield of the product were highest at pH 4 to 5. With a medium containing 50 g lipids l(-1), production reached a maximum of 68 g oxalic acid l(-1) after 7 d. A high yield of the product (up to 1.4 g oxalic acid g(-1) lipids consumed) was achieved with oil and fatty acids combined.
Rymowicz
W
W
Department of Biotechnology and Food Microbiology, Agricultural University of Wroclaw, Norwida 25, 50-375 Wroclaw, Poland. rymowicz@ozi.ar.wroc.pl
Lenart
D
D
D001234:Aspergillus niger / Q000737:chemistry / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D005227:Fatty Acids / Q000378:metabolism*; D005229:Fatty Acids, Monounsaturated; D005818:Genetic Engineering / Q000379:methods; D006863:Hydrogen-Ion Concentration; D050356:Lipid Metabolism; D009154:Mutation; D025282:Mycelium / Q000254:growth & development; D019815:Oxalic Acid / Q000378:metabolism*; D010938:Plant Oils / Q000378:metabolism*; D000074262:Rapeseed Oil; D013045:Species Specificity; D013379:Substrate Specificity
D005227:Fatty Acids; D005229:Fatty Acids, Monounsaturated; D010938:Plant Oils; D000074262:Rapeseed Oil; D019815:Oxalic Acid