Pr^(3+)对大肠杆菌的生物化学效应  

Biochemical effect of Pr^(3+) On E.coli.

作　　者：胡善洲[1] 刘鹏[1] 李曦[1] 

机构地区：[1]武汉理工大学理学院化学系,湖北武汉430070

出　　处：《浙江大学学报（理学版）》2010年第2期201-203,209,共4页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(50702040)

摘　　要：用微量热法研究Pr3+离子对大肠杆菌的生物化学效应.从生成的热谱图分析可以看出,低剂量的稀土离子Pr3+的存在可以缩短细菌的停滞期,增加生长速率常数和最大放热功率,刺激大肠杆菌的生长.相反,较高剂量的Pr3+延长了细菌的停滞期,减小了生长速率常数和最大放热功率,抑制了大肠杆菌的生长.The biochemical effect of Pr^3＋ on E.coli was studied by microcalorimetry.According to the analysis of thermogenic curves,shortened lag phase of bacteria growth,increased growth rate constant and maximum heat power were observed in the presence of Pr^3＋ in low concentration and the results indicated that the growth of E.coli was promoted.On the other hand,Pr 3＋ in higher concentration can cause prolonged lag phase,a decrease in the maximum heat power and growth rate constant.The results suggest the growth of E.coli was inhibited in the presence of Pr3＋ in high concentration.

关 键 词：微量热法 产热曲线 生长常数 刺激 抑制 

分 类 号：X703[环境科学与工程—环境工程]