不同分散度的碘化铜颗粒对酵母细胞发酵活性的影响

H. M. Bagatskaya, R. Mazurenko, S. Makhno, P. Gorbyk
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引用次数: 0

摘要

采用差示微量热法研究了不同分散度的碘化铜(CuI)颗粒对厌氧条件下酿酒酵母(Saccharomyces cerevisiae)生物体内生命活性的影响。研究发现,当Cu+浓度增加到一定值时,会激活细胞生物的保护功能,表现为酵母细胞在质膜和可能的其他膜结构的结构重组上的能量成本增加,以对抗杀菌剂对生物及其内部膜结构的渗透。一旦达到一定浓度的Cu+,酵母菌就会失去原有的活力,因此在其极值时,酵母菌就会完全停止其重要的活动。纳米级碘化铜溶液中Cu+离子的平衡浓度明显高于纳米级碘化铜微粒,这是由于纳米级碘化铜微粒表面曲率的增大和界面表面张力的改变,使得固液界面处溶液中Cu+离子的功函数降低所致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of copper iodide particles of different dispersity on the fermentation activity of yeast cells Saccharomyces cerevisiae
The effect of different dispersity copper iodide (CuI) particles on vital activity in an aqueous yeast suspension of organisms of the species Saccharomyces cerevisiae under anaerobic conditions under endogenous metabolism was studied by differential microcalorimetry. It has been found that an increase in the concentration of Cu+ to certain values leads to activation of the protective functions of cellular organisms, which is manifested in an increase in the energy costs of the yeast cell on the structural reorganization of the plasmolemma and possibly other membrane structures in order to counter the penetration of the bactericidal agent into the organism and its internal membrane structures. Upon reaching certain concentrations of Cu+, the yeast organism loses its original vitality, so that at its extreme values the organism completely stops its vital activity. The equilibrium concentration of Cu+ ions in aqueous solution for copper iodide nanoparticles is significantly higher in comparison with their microparticles, which is explained by the lower work function of CuI in the solution at the solid-liquid interface due to the increase in the curvature of the surface of the nanoparticle and the change in the surface tension at the interface.
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