环境微生物系统中氧化还原电位的线性不可逆热力学模型的建立。
Development of linear irreversible thermodynamic model for oxidation reduction potential in environmental microbial system.
作者信息
Cheng Hong-Bang, Kumar Mathava, Lin Jih-Gaw
机构信息
Institute of Environmental Engineering, National Chiao Tung University, Hsinchu City, Taiwan.
出版信息
Biophys J. 2007 Aug 1;93(3):787-94. doi: 10.1529/biophysj.106.103507. Epub 2007 May 11.
Nernst equation has been directly used to formulate the oxidation reduction potential (ORP) of reversible thermodynamic conditions but applied to irreversible conditions after several assumptions and/or modifications. However, the assumptions are sometimes inappropriate in the quantification of ORP in nonequilibrium system. We propose a linear nonequilibrium thermodynamic model, called microbial related reduction and oxidation reaction (MIRROR Model No. 1) for the interpretation of ORP in biological process. The ORP was related to the affinities of catabolism and anabolism. The energy expenditure of catabolism and anabolism was directly proportional to overpotential (eta), straight coefficient of electrode (L(EE)), and degree of coupling between catabolism and ORP electrode, respectively. Finally, the limitations of MIRROR Model No. 1 were discussed for expanding the applicability of the model.
能斯特方程已直接用于推导可逆热力学条件下的氧化还原电位（ORP），但经过若干假设和/或修正后应用于不可逆条件。然而，这些假设在非平衡系统中ORP的量化有时并不合适。我们提出了一种线性非平衡热力学模型，称为微生物相关还原和氧化反应（MIRROR模型1号），用于解释生物过程中的ORP。ORP与分解代谢和合成代谢的亲和力有关。分解代谢和合成代谢的能量消耗分别与过电位（η）、电极直线系数（L(EE)）以及分解代谢与ORP电极之间的耦合程度成正比。最后，讨论了MIRROR模型1号的局限性，以扩大该模型的适用性。
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