论文部分内容阅读
稀土在农林畜牧业和医学等方面应用的不断扩大 ,导致稀土广泛进入环境 ,并通过多种途径进入生物体内 为此 ,人们迫切希望了解稀土的生物作用及其在生物体内的远期效应 铒是稀土系列中的重稀土元素 ,目前关于它对大肠杆菌的作用未见报道 本文采用LKB -2 2 77生物活性监测系统 ,测定了硝酸铒存在下大肠杆菌在 37℃的热功率—时间曲线 ,定量地探讨研究在硝酸铒存在下 ,大肠杆菌的生长代谢规律 ,研究Er3 + 对大肠杆菌的刺激或抑制作用 研究表明 ,Er3 + 对大肠杆菌的作用表现出显著的双向性 ,即当Er3 + 的浓度处在 0～ 350 μg/mL范围时 ,Er3 + 刺激大肠杆菌的生长 ,超出这一范围 ,Er3 + 则抑制大肠杆菌的生长
Rare earths in agriculture, forestry, animal husbandry and medical applications continue to expand, resulting in a wide range of rare earth into the environment, and enter the organism by this way, people are eager to understand the biological effects of rare earth and its long-term effects in vivo erbium is At present, there is no report on the effect of heavy rare earth elements in the rare earth series on Escherichia coli. In this paper, LKB -2 2 77 biological activity monitoring system was used to determine the thermal power-time curve of Escherichia coli at 37 ℃ in the presence of erbium nitrate, In order to study the growth and metabolism of Escherichia coli in the presence of erbium nitrate, the research on the stimulating or inhibiting effect of Er3 + on Escherichia coli showed that the effect of Er3 + on Escherichia coli showed a significant bidirectionality. That is, when the concentration of Er3 + In the range of 0-350 μg / mL, Er3 + stimulates the growth of E. coli beyond which Er3 + inhibits the growth of E. coli