5 ppm 以上のクロルテトラサイクリンおよびオキシテトラサイクリンの保鮮効果に関する研究

抄録

The previous paper¹⁾ revealed that the preservative effect of CTC was increased more than that of OTC when the concentration was increased from 2 to 6ppm. AYRES et al²⁾. and LERKE and FARBER³⁾ reported that the effectiveness of OTC approached to that of CTC at 25 to 30ppm level. The present study was undertaken in order to explain this apparent discrepancy.
Data herein presented showed clearly that the rate of increase in the effectiveness of CTC was decreased with the increase in concentration from 5 to 30ppm as contrasted to that of OTC (Table 4) and that the ratio of the effectiveness of CTC to that of OTC was decreased with increasing their concentrations (Fig. 2). It was noted that until the incipient spoilage the CTC residue was sharply decreased to lower than a 10% level of the initial concentration whereas the OTC residue decreased only to a 80% level (Table 5).