暖冬期に於ける寒天の変敗防止に関する研究-IV : 次亜塩素酸ソーダによる寒天製造用ヨシ簣の殺菌について

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In the previous paper, the authors indicated that causative microörganisms in the spoilage of agar and its intermediate product “tokoroten” were substantially derived from the tainted reed mats during agar processing, and consequently it was necessary for manufactures to sterilize reed mats in order to prevent “tokoroten” and agar from spoilage in the mild winter. In the present paper, the authors examined the effect of sodium hypochlorite on the disinfection of reed mats in various conditions, and obtained the following results. (1) It is most effective practically to soak reed mats in 140-280ppm (as available chlorine) sodium hypochlorite solution for 30-60 minutes (Ref., Tables 3, 4 and 5). (2) Considerable amounts of available chlorine in sodium hypochlorite solution are consumed extremely at every time of the soaking, and consequently it is necessary to supply the shortage of disinfectant at every time of the soaking (Ref., Table 6).
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