微生物の凝集に関する二・三の実験

概要

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The principal purpose of this study was in the preliminary check of a definite correlation, if any, between the feasibity of coagulation and the value ζ-potential, the latter of which was apparantly affected by an addition of multi-valent metallic ions such as Al^<+3>, Fe^<3+>.The microbes examined here were Bacillus cereus (spore) and Rhodotorula (a wild strain). Both were suspended individualoly in a dilute aquaous solution of KCl (10^<-2> M).The value of ζ-potential was determined by microscopic electrophoresis. The coagulation was found from this series of experiments to proceed with ease in parallel with the decrease of ζ-potential, at relatively low ionic concentrationsl. However, no definite correlation was found in a higher range of the ionic concentration. It was concluded that the electric double leyer theory does not necessaily account for these coagulation phenomena; especially, the alleged critical ζ-pontential that is said to have an effecton the coagulation was not confirmed so far as this study was concerned. This implies that the effect of the flowing behavior of a suspending medium is a matter of concideration for the formation of coagulation of microorganisms in a more definite way.
社団法人日本生物工学会の論文
1968-05-25