9Stewart, G. N. The changes produced by the growth of bacteria in the molecular concentration and electrical concentration and electrical conductivity of culture media [ J ]. Journal of Experimental Medicine. 1899, 4:235-243.
10Coppola, K. and Firstenberg- Eden, R. Impedance based method for detection of spoilage organism in UHT low - acid foods[J]. Journal of food Scinence. 1998, 53 : 1521 - 1527.