麹菌に關する研究 (第6報) : Amylase 生成に及ぼす窒素源の影響 (其3)

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Two strains of Aspergillus Oryzae, "long and short, " and Aspergillus niger "Akakoji" were cultured in PFEFFER's solution containing (NH_4)_2SO_4 NH_4NO_3,urea or polypeptone as nitrogen source, and the productin of amylase in the culture solution and mycelium from the surface and submerged cultures was investigated.1,Aspergilus Oryzae produced large quentities of acid-fast amylase in the culture solution, and amylase in the mycelium consisted almost of α-amylase."Akakoji" produced acid-fast amylase in almost equal quantities in the culture solution and mycelium.2,Aspergillus Oryzae produced much amylase in the surface culture, except with urea, which induced the production of much more amylase in the submerged culture.The good nitrogen sources are tabulated as follows : -
公益社団法人日本生物工学会の論文
1951-01-15