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链霉菌 70 2摇瓶发酵液用无水乙醇提取 ,制备成 70 2生物防腐剂 2 0 0倍稀释液。分别在牛肉膏蛋白胨培养基平板上测定了 6种不同的细菌 ,在马铃薯葡萄糖培养基平板上测定了 9种霉菌和 4种酵母菌。除大肠杆菌的抑菌效果为 93 %外 ,其余菌的抑菌效果达到 1 0 0 % ;对制备好的平板暴露在空气中自然接种微生物的抑菌效果也达到 1 0 0 %。
Streptomyces 70 2 shake flask fermentation broth extracted with anhydrous ethanol, prepared as 2 to 70 2 biological preservative 200 dilutions. Six different kinds of bacteria were determined on beef extract peptone medium plate, nine kinds of molds and four kinds of yeasts on potato dextrose medium plate. In addition to the bacteriostatic effect of Escherichia coli 93%, the antibacterial effect of the other bacteria reached 100%; the inhibitory effect of the prepared plate exposed to the natural inoculation of microorganisms also reached 100%.