两种芦荟抑菌效果的比较研究

A Comparative Study on Bacteriostasis of Two Species of AloeLuo Aiguo,Hu Bianfang,Niu Wei

目的:比较木立芦荟和中华芦荟对几种常见细菌的抑制作用,为芦荟产品的进一步开发利用提供参考性资料。方法:用滤纸片测定法在不同浓度梯度、不同温度和不同pH条件下分别测定芦荟的抑菌效果。结果:木立芦荟对革兰氏阳性菌的抑菌效果较好,中华芦荟对革兰氏阴性菌的抑菌效果较好。同时,芦荟汁浓度越高抑菌效果越明显(芦荟汁浓度为20%和40%时虽然有抑菌效果,但却作用很小,甚至抑菌圈直径都难以测量,100%时直径达到29 mm),温度却对它们的抑菌效果影响不明显(抑制圈直径变化范围在0.0 mm^1.0 mm之间),两种芦荟在偏碱性环境中有抑菌效果,且在pH=8.0时抑菌效果最明显(抑菌圈直径最大达到29 mm)。结论:木立芦荟和中华芦荟均有不同程度的抑菌效果,外界环境条件也对两种芦荟的抑菌效果产生一定的影响。

Objective： To investigate the bacteriostasis of aloe arborescens and aloe vera var. chinensis. Methods： Bacteriostasis in different concentrations of aloe, different temperature and different pH were studied with agar diffusion. Results Aloe arborescens had significant effect on Gram- positive bacteria （G＋）, and aloe vera var. chinensis on Gram-positive bacteria （G-）. The antibacterial effect of 100% Aloe juice was best, with 29 mm long diameter of bacteriostasis circle （There were little bacte- riostasis in 20% and 40% aloe, with undetermined bacteriostasis circle）. Temperature had little effect on bacteriostasis （The diameter of bacteriostasis circle ranged from 0.0mm to 1.0mm）. The significant antibacterial effect showed at pH = 8.0 （The maximum diameter of bacteriostasis circle was 29mm）. Conclusion： The two species of aloe had bacteriostasis effect on selected bacteria, and environmental factors also had effect on the bacteriostasis.