著者
杉本 芳範 田中 伸哉 古川 彰久 渡辺 和夫 吉田 敏臣 田口 久治
出版者
公益財団法人 日本醸造協会
雑誌
日本釀造協會雜誌 (ISSN:0369416X)
巻号頁・発行日
vol.82, no.3, pp.205-210, 1987

ジャケット冷却時の醪温度応答特性の解析結果をもとに, 温度制御方式としてカスケード制御を採用し, 総米1トン仕込みの醪で発酵ガス発生速度をオンライン計測しつつ計算機を利用した適応的自動制御を行ったところプロセスは順調に制御され, 生成酒の品質も目的に近いものが得られた。
著者
田口 久治 西村 公臣
出版者
公益社団法人日本生物工学会
雑誌
醗酵工學雑誌 (ISSN:03675963)
巻号頁・発行日
vol.29, no.3, pp.98-101, 1951-03-15

I. Characters of Actinomyces No. M. 1. : At the beginning, an actinomyces which produces two kinds of antibiotic substances entirely different from streptomycin and streptothricin in biological and chemical respect, was isolated. This strain, No.M.1,resembles very closely A. alboflavus, and somewhat related with A.farcinicus and A.roseus in its biochemical characteristics.II. Production of the antibiotics in the broth : When the strain was grown under submerged culture in the medium containing 1% glycerine, 0.5% meat extract, 0.5% peptone, 0.5% NaCl, the antibiotic activity reached to 88 streptomycin units (using E. coli SIRAISI as the test organism), but when glycerine was replaced by glucose, dextrine or lactose, the potency was not very high. Starch was found suitable for hte production of the antibiotics, just in the same way as the glycerine (Table 1). The anitibiotics seem to be produced in an increased quantity in the medium containing 0.25% (NH_4)_2HPO_4,or 0.005% MgSO_4,and especially when 5% Nuka-extract was added, the antibiotic activity reached to 245 units (Table 2).III. Methods of extraction : (Fig.1)1) First method of preparing antibiotic substance : The filtrate is readily extracted by the use of ethyl acetate. Then the ethyl acetate solution is concentrated to its 1/5 volume by vacuum distillation.The concentrated ethyl acetate solution is passed through alumina column.The column may be washed by passing the mixture of ethyl acetate and ether (2 : 1) through it. At first, the yellow part of the liquid comes out of the bottom containing antibiotic substance. The solvnets in this fraction will be removed by vacuum distillation, yellow powder being deposited.This substance may be tentatively designated as M1-A.2) Secondary antibiotic substance : This second substance is extracted from the residual broth left after extraction of the first substance, in the same way as those used in the isolation of streptomycin and streptothricin. This substance may be tentatively called as M1-B.IV. Chemical properties : According to the color reaction of protein and amino acid, M1-A and M1-B are different from streptomycin and streptothricin, but when they are examined by the antibacterial spectrum, M1-B resembles closely streptothricin (Table 3,Table 4). The minimum lethal doses of M1-A and M1-B are 2mg and 1mg per 20g mice respectively.
著者
今中 忠行 海江田 豪児 田口 久治
出版者
公益社団法人日本生物工学会
雑誌
醗酵工學雑誌 (ISSN:03675963)
巻号頁・発行日
vol.51, no.6, pp.423-430, 1973-06-25

前報で, 菌体増殖および酵素生産に関する動力学モデルを提出した.本報では, まずgalactose取り込みの制限条件を検討した結果, glucoseの添加によりgalactoseの細胞内への取りこみはon-off方式でただちに完全に阻害されること, およびgalactoseの細胞膜透過系は構成的であることが判明した.またこれらの事実より, 酵素誘導に長時間を要する主因は, galactoseの膜透過系にあるのではなく, 細胞内の諸反応と細胞内での物質移動であると考えられる.さらに本モデルを用いて酵素誘導とその抑制, glucoseとgalactoseを含む回分培養および連続培養の非定常過程の実験結果をすべて十分に説明すつことができた.以上のことから, 本モデルと解析に用いた諸定数を最適化の計算に用いる妥当性十分と判定した.