五炭糖より工業藥品の生産 : (第3報)有機酸醗酵に關する基礎實驗(1)

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Using the pentose fermentable strain Streptococcus lactis-var. pentosus (S. L. P.) isolated by Toyozawa, we studied the foundamental conditions for lactic and acetic acid production from pentoses.As organic nitrogen nutriments, the extract of wheat germ is efficient as well as yeast extract. As the most optimum condition for culturing, we found that sugar (xylose) concentration 5%, pepton 1% besides the extract of yeast or wheat germ, culturing time 10 days at 30℃.S. L. P. indicates 98.7% sugar consumption in 1% sugar media and 89.4% in 5% sugar media in 10 days, and from this factor S. L. P. is more favorable than Lactobacillus pentoaceticus which was reported by Pederson and Fuel. S. L. P. indicates 92% acid formation for utilized sugar and lactic : acetic acid ratio is 60 : 40.
公益社団法人日本生物工学会の論文
1949-05-15