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首页> 外文期刊>Environmental toxicology and chemistry >PREDICTING RELATIVE TOXICITY AND INTERACTIONS OF DIVALENT METAL IONS: MICROTOX~® BIOLUMINESCENCE ASSAY
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PREDICTING RELATIVE TOXICITY AND INTERACTIONS OF DIVALENT METAL IONS: MICROTOX~® BIOLUMINESCENCE ASSAY

机译:预测不同金属离子的相对毒性和相互作用:MICROTOX〜®生物发光分析

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摘要

Both relative toxicity and interactions between paired metal ions were predicted with least-squares linear regression and various ion characteristics. Microtox~® 15 min EC50s (expressed as free ion) for Ca(Ⅱ), Cd(Ⅱ), Cu(Ⅱ), Hg(Ⅱ), Mg(Ⅱ), Mn(Ⅱ), Ni(Ⅱ), Pb(Ⅱ), and Zn(Ⅱ) were most effectively modeled with the constant for the first hydrolysis (K_H for M~(n+) + H_2O → MOH~(n-1) + H~+) although other ion characteristics were also significant in regression models. The ∣log K_H ∣ is correlated with metal ion affinity to intermediate ligands such as many biochemical functional groups with O donor atoms. Further, ordination of metals according to ion characteristics, e.g., ∣log K_H∣, facilitated prediction of paired metal interactions. Pairing metals with strong tendencies to complex with intermediate or soft ligands such as those with O or S donor atoms resulted in strong interactions.
机译:通过最小二乘线性回归和各种离子特征预测了成对金属离子之间的相对毒性和相互作用。 Microtox〜®对Ca(Ⅱ),Cd(Ⅱ),Cu(Ⅱ),Hg(Ⅱ),Mg(Ⅱ),Mn(Ⅱ),Ni(Ⅱ),Pb( Ⅱ)和Zn(Ⅱ)最有效地模拟了第一次水解的常数(M_(n +)+ H_2O→MOH〜(n-1)+ H〜+的K_H),尽管其他离子特征在回归模型。 ∣log K_H with与金属离子对中间配体的亲和力相关,例如许多带有O供体原子的生化官能团。此外,根据离子特性例如metalslog K_H∣对金属进行排序,有助于预测成对的金属相互作用。将具有强烈配位倾向的金属与中间或软配体(例如具有O或S供体原子的配体)配对会产生强烈的相互作用。

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