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IMA Journal of Applied Mathematics 1999 63(1):89-112; doi:10.1093/imamat/63.1.89
© 1999 by Institute of Mathematics and its Applications
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Estimating rate constants in a convection-diffusion system with a boundary reaction

DA EdwardsY

Department of Mathematics, University of Maryland, College Park, Maryland 20742-4015, USA Y Current address: Department of Mathematical Sciences, University of Delaware, Newark, Delaware, 19716-2553, USA E-mail: edwards@math.udel.edu

While performing biomolecular interaction analysis (BIA), scientists often use surface plasmon resonance (SPR) to measure rate constants of the associated reactions. A mathematical model of a BIAcoreTM, a common SPR device, consists of a convection-diffusion equation in a channel with a reacting surface at the channel ceiling. Asymptotic and singular perturbation techniques are used to analyse the concentration of the reacting species in two cases: when the reaction occurs much more slowly than diffusion, and when the reaction occurs on the same time-scale as diffusion. Linear and nonlinear integral equations result from the analysis; explicit and asymptotic solutions are constructed for physically realizable cases. These expressions provide a direct way to estimate the rate constants from raw data.


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