食品のガス殺菌に関する研究 : (第1報)ガス殺菌剤の水溶液中における殺菌特性

概要

論文の詳細を見る
In order to study the microbicidal action of some gaseous sterilants, formaldehyde (F), propylene oxide (PO), ethylene oxide (EO), and β-propiolactone (PL), their activities in aqueous solution were firstly investigated employing B. subtilis spores and vegetative cells of some bacteria. These drugs applied to aqueous solutions were sporicidal as well as bactericidal, but the rate of action was generally low. As shown in Fig. 1 and 2,the killing rates by these drugs were of the first order throughout the whole course of disinfection.The effectiveness of these drugs upon vegetative cells and spores of bacteria could be listed in a decreasing order as follows : PL≧F>EO>PO.Especially, the spericidal activity of PL upon B. subtilis spores was most remarkabel.Concentration exponents (n), computed by the equation, K=AC^n, in which k and C are disinfectin constant and drug concentration, resp., were in the range between 0.7 and 1.0 in the case of B. subtilis spores, whereas the values were larger (i.e. 1.5〜2.5) in the case of vegetative bacteria as shown in Table 3.Temperature coefficients (Q_<10>) of disinfection were comparatively large ranging from 2 to 3.Nutritive constituents and pH (between 4.5 and 8) of the media tested scarcely affected the sporicidal activities of these drugs.
社団法人日本生物工学会の論文
1962-03-15