微生物によるレダクトン生成に関する研究 : (第2報)麹菌の培養条件とレダクトン生成の関係

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The Optimum media and conditions for the production of reductones by Aspergilli in broth and their stability have been studied. The conditions to obtain the maximum yield of reductones were as follows.Incubation time and temperature : 15 days at 30℃, medium : glucose 15%, (NH_4)_2SO_4 0.41%, KH_2PO_4 0.25% MgSO_4・7H_2O 0.25%, MnSO_4 MnSO_4・7H_2O 0.1% ZnSO_4 trace, yeast extract 0.01%.The decomposition of reductones produced in broth was inevitable. Aeration and UV-irradiation accerelated the decomposition of reductones. The reductones during their rising yield in broth appeared more stable than their falling yield. The increase of pH from 2 to 6 in culture medium resulted in a decrease in yield of reductones.
社団法人日本生物工学会の論文
1964-05-15