大腸菌の硝酸還元酵素と酸素呼吸に対する野菜抽出液の効果

概要

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In some bacteria such as Escherichia coli and Peudomonas denitrificans, dissimilatory nitrate reductase (DNRase) is induced when the cells are grown with nitrate under anaerobic conditions. We have reported that DNRase activities in Escherichia coli and Pseudomonas denitrificans were increased upon incubation of the resting cells with monovalent cations and in contrast, decreased with cysteine. The conversion of nitrite to nitrosamine which is carcinogen is a serious problem. This facts promoted us to investigate the control of nitrite formation by Escherichia coli cells, since this bacteria has no activity of denitrification. In this report, the effects of some vegetable extracts on monovalent cation effect on DNRase activity were investigated. Furthermore, we recognized that monovalent cation affected oxygen respiration in Escherichia coll. Therefore, the effects of some vegetable extracts on oxygen respiration were studied, too.
宇部工業高等専門学校の論文