熱殺菌に関する研究 : (第4報)微生物細胞の物性 : (その3 熱拡散率と比熱)

概要

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The thermal diffusivity of microbial cell aggregates with a predetermined value of cell volume fractino, φ was measured experimentally. The spores and vegetative cells examined were : Bacillus stearothermophilus, Bacillus subtilis and Baker's yeast. The thermal diffusivity and specific heat of the microbes were assessed from the thermal diffusivity values obtained so far, and in addition, from the physical properites such as cell density, thermal conductivity and so on. (see Table 2) The latter values were reported previously.This assortment of data enabled one to estimate the time delay in acquiring 99.9% response. In the center of spore clumps, 1000μ in diameter, for instance, it was estimated as 1.3sec. It is concluded, therefore, that this order of magnitude in response to the environmental change of temperature is negligible for the usual sterilization practice.
社団法人日本生物工学会の論文
1966-07-25