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Modeling the performance of protein-A affinity columns using asymptotic solutions

机译:使用渐近解决方案对A蛋白亲和柱的性能进行建模

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Protein-A affinity columns are routinely used for the capture of monoclonal antibodies from cell culture media. In process optimization studies mathematical models are often used to predict the performance of chromatography columns. In this work we report the ability of two asymptotic solutions of rigorous mathematical models to predict the dynamic loading capacities of protein-A affinity columns. The analytical solutions, predicated on two different intraparticle diffusion mechanisms (surface diffusion and homogeneous diffusion), were used to analyze published data over a wide range of column residence times. It was found that the asymptotic solution of the homogeneous diffusion model under predicted experimental dynamic loading capacities measured at low column residence times. The limiting solution of the surface diffusion model also failed to describe the same set of data. Caution is thus recommended in the use of such asymptotic solutions for process design or optimization.
机译:蛋白A亲和柱通常用于从细胞培养基中捕获单克隆抗体。在过程优化研究中,通常使用数学模型来预测色谱柱的性能。在这项工作中,我们报告了严格数学模型的两个渐近解的能力,以预测A蛋白亲和柱的动态载量。根据两种不同的颗粒内扩散机制(表面扩散和均相扩散)预测的分析溶液用于分析广泛的色谱柱停留时间范围内的已发布数据。发现在较低的色谱柱停留时间下测得的预计实验动态载荷下,均质扩散模型的渐近解。表面扩散模型的极限解也未能描述同一组数据。因此,建议在使用此类渐近解决方案进行过程设计或优化时谨慎行事。

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