Effects of Hydrogen-ion Concentration upon the Decomposition of Fish Muscle by Bacteria

抄録

Effects of hydrogen-ion concentration upon the physiology of bacteria have been studied along two main paths, namely, on the growth rate of bacteria, and on the other physiological activities of them. The first has attracted much more attention of the bacteriologists than the second, but much is left to be desired in the technique. The second mostly concerns with the influence of initial pH of the medium on the fermentation by lactic acid bacteria, Bact. coli, etc. Such investigations as carried out by M_EYERHOF⁽¹⁾ into the oxidation of ammonia and nitrite, or by ITANO (2) into the decomposition of broth media in relation to the afore-mentioned con-ditions are not many. Still fewer are the papers which have dealt with the decomposition of the fish muscle under such conditions.
The present papcr embodies my observations on the effects of pH on the rate of the decomposition as well as the rate of growth of bacteria in the fish muscle suspensions.