酒精醪の改良に関する研究(第12報) : 菌類アミラーゼ生成に適する培養基室質について(其の1)

概要

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The suthors studies the composition of culture media suited to the production of fungous amylase in submerged koji. Asp. awamori var. fumeus was used for this experiment, for it is strong in the saccharification power.1) When singly used, wheat bran and corn meal were favofable for the production of amylase, especially at a concentration of 4%. Sweet potato powder was unsuited.2) Using a medium containing 3% of wheat bran and 2 or more % of sweet potato powder, the production of amylase in it was remarkable.3) In the media containing 1〜2% of corn meal and 3 or more % of wheat bran, the produced amylase was powerful. Also a desirable result was obtained, when 3 or more % of corn meal and 2% of wheat bran were contained in the media, but the production of amylase was most remarkeble in a medium containing 4% of the former and 3% of the latter.4) Inorganic nitrogen compound was added to wheat bran, corn meal or sweet potato powder. In this test, (NH_4)_2SO_4 and NH_4Cl were not efficacious for the production of amylase, but NaNO_3 and KNO_3 fairly useful. When KCl and CaCO_3 were added in a small quantity, they exerted a good effect on the production of amylase, perhaps owing to their buffer and neutralizing action.5) The mixing of sweet potato powder with NaNO_3 in a ratio of 10 : 1 promoted the production of amylase remarkably.
公益社団法人日本生物工学会の論文
1957-10-15