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首页> 外文期刊>Journal of Thermal Analysis and Calorimetry >Effects of ytterbium ion on the growth, metabolism and membrane fluidity of Tetrahymena thermophila
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Effects of ytterbium ion on the growth, metabolism and membrane fluidity of Tetrahymena thermophila

机译:ion离子对嗜热四膜菌生长,代谢和膜流动性的影响

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摘要

Power-time curves and metabolic properties of Tetrahymena thermophila BF5 exposed to different Yb3+ levels were studied by ampoule method of isothermal calorimetry at 28°C. Metabolic rate (r) decreased significantly while peak time (PT) increased with the increase of Yb3+. These results were mainly due to the inhibition of cell growth, which corresponded to the decrease of cell number obtained by cell counting. Compared with cell counting, calorimetry was sensible, easy to use and convenient for monitoring the toxic effects of Yb3+ on cells and freshwater ecosystem. It was also found that cell membrane fluidity decreased significantly under the effects of Yb3+, which indicated that Yb3+ could be membrane active molecules with its effect on cell membranes as fundamental aspect of its toxicity.
机译:采用安瓿等温量热法在28℃条件下,研究了不同Yb3 +浓度下嗜热四膜膜BF5的动力时间曲线和代谢特性。随着Yb3 + 的增加,代谢率(r)显着下降,而峰值时间(PT)则增加。这些结果主要归因于细胞生长的抑制,其对应于通过细胞计数获得的细胞数目的减少。与细胞计数相比,量热法是一种明智的方法,易于使用,并且易于监测Yb3 + 对细胞和淡水生态系统的毒性作用。还发现在Yb3 +的作用下细胞膜的流动性显着降低,这表明Yb3 +可能是膜活性分子,其对细胞膜的影响是其毒性的基本方面。

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