Binding kinetics of bacteria cells on immobilized antibodies in microfluidic channels: Modeling and experiments
Binding kinetics of bacteria cells on immobilized antibodies in microfluidic channels: Modeling and experiments
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微流体通道中细菌细胞与固定化抗体的结合动力学:建模和实验
DOI:
10.1016/j.snb.2017.06.113
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发表时间:
2017
影响因子:
8.4
通讯作者:
E. Gogolides
中科院分区:
文献类型:
--
作者:
Athina S. Kastania;K. Tsougeni;V. Constantoudis;E. Gogolides
Many separation or detection techniques, such as chromatography or detection on a sensor, are based upon the interaction between analyte molecules and immobilized ligand molecules on the surface of a microfluidic channel. Typically, the aim is to capture an analyte with the maximum possible binding to the ligands. Here, we elaborate a mathematical model for the binding kinetics of analyte molecules passing through a microchannel with simultaneous association to ligand molecules on its surface to provide deeper understanding and prediction of experimental behavior. The focus and contribution of this work is on analytes that are not discrete units, but are grouped as binding sites (e.g. antigens on the outer cell membrane), while our results can also find application for functionalized micro particles. We apply and validate the model for the case where analytes are grouped onSalmonellacells, and ligands are anti-Salmonellaantibodies. A simple equation is developed with variables the flow rate, microchannel dimensions, concentrations, and the active area-ratio increase when a rough microchannel is used. The model is used to fit the association rate constants with spatially varying experimental data of number densities (cells/mm2) of Green Fluorescent Protein (GFP)-Salmonellacell binding in a microfluidic device. The model is also used to predict cell binding in various microchannels with different geometries, and to design microfluidics for specific operations.
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影响因子:
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通讯作者:
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