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Selection of a hyperproducing strain of Aspergillus niger for biosynthesis of citric acid on unusual carbon substrates

J. Pelechová, L. Petrová, E. Ujcová, L. Martínková,

. 1990 ; 35 (2) : 138-142.

Language English Country Czech Republic

Document type Comparative Study, Journal Article

Persistent link   https://www.medvik.cz/link/bmc15033573

Several tens of mutants were obtained by UV irradiation of a spore suspension of Aspergillus niger. Producers yielding large amounts of citric acid were selected on a modified Czapek agar containing methyl red as pH indicator. After a submerged cultivation in flasks with baffles, a mutant characterized by yellow pigmentation on wort agar and by yields of citric acid up to 74.6% in the medium containing glucose was chosen from 130 isolates tested.

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