Rhizopus屬菌の乳酸生成能に就て (第3報) : 乳酸生成率の向上策

概要

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Biochemical decomposition of gluce e carried out by Rhizopus group may be considered as sum of the following reactions : (1) complete oxidation (respiration) (2) fumaric acid formation (3) alcoholic fermentation, (4) lactic acid fermentation (perhaps : C_6H_<12>O_6=2C_3H_6O_3,and (5) pellicle formation (assimilation). And if so, the yield of lactic acid (=lactic acid produced sugar consumed) will be much improved, by eliminating partial reactions (1), (2), (3) and (5).In this paper we endaevoured to eliminate the reactions (1) and (2), using a few strains (chiefly Rh. Oryzae) which normally produce 30〜40% of lactic acid but no fumaric acid.Anaerobic culture suppressed respiration almost completely and improved the yield of lactic acid to 50〜60%, but it increased alcohol formation eminently.Ba especially when it was use in the form of BaCO_3,in place of CaCO_3,as acid neutralizer, pushed up the yield of lactic acid to the extent of 76%.It must be a very intersting fact from plant physiological point of view, why Barium ion exerts such a characteristic influence.
社団法人日本生物工学会の論文
1950-01-15