暖冬期に於ける寒天の変敗防止に関する研究-I
アガラーゼに及ぼす防腐剤の影響について
1956 年 22 巻 1 号 p. 30-34
詳細
1956 年 22 巻 1 号 p. 30-34
In the mild winter, agar s ?? ms to be often spoiled during the manufacturing process. It has been investigated that the spoilage of agar is due to the actions of some putrefactive bacteria, especially due to the activity of agarase of agar-decomposing bacteria. In the application of antiseptics to prevent agar from rottennes, both the bactericidal effect on these bacteria and the inhibitory effect on agarase should be considered.
As the first step, we experimented on the effects of several antiseptics on agarase. The resu ?? s were as follows:
(1) Sodium hypochlorite inhibited the activity of agarase at the concentration of 0.01_??_0.1% (as available chlorine).
(2) Dehydro acetic acid (D. H. A.) and sorbic acid were effective, but the inhibitory effects were entirely due to pH lowering.
(3) 5-nitro-2-furfuryl acryl amide (Z furan), hydrogen peroxide, p-hydroxyl-butylbenzoate (P. O. B. B.) and benzalkonium chloride (B. A. C.) were ineffective.
