Modeling the electrophoresis of rigid polyions. Inclusion of ion relaxation

被引:54
作者
Allison, SA
机构
[1] Department of Chemistry, Georgia State University, Atlanta
关键词
D O I
10.1021/ma960890w
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A numerical algorithm is developed to calculate electrophoretic mobilities of rigid model polyions that includes the effect of ion relaxation. The Navier-Stokes, Poisson, and ion transport equations are cast into forms that are amenable to numerical solution by boundary element procedures. The three equations are solved simultaneously by an iterative procedure. It is applied first to a spherical polyion containing a centrosymmetric charge distribution and double layer that is not thin compared to the radius of the sphere. Resulting mobilities compare favorably (to within 10%) with independent theory. The algorithm is then applied to spherical polyions containing noncentrosymmetric charge distributions. Although the present calculations are restricted to spherical polyions, there is no formal difficulty in extending them to nonspherical polyions.
引用
收藏
页码:7391 / 7401
页数:11
相关论文
共 38 条
[1]   SIMULATION OF THE DIFFUSION-CONTROLLED REACTION BETWEEN SUPEROXIDE AND SUPEROXIDE-DISMUTASE .2. DETAILED MODELS [J].
ALLISON, SA ;
BACQUET, RJ ;
MCCAMMON, JA .
BIOPOLYMERS, 1988, 27 (02) :251-269
[2]   TRANSPORT OF CHARGED MACROMOLECULES IN AN ELECTRIC-FIELD BY A NUMERICAL-METHOD .1. APPLICATION TO A SPHERE [J].
ALLISON, SA ;
NAMBI, P .
MACROMOLECULES, 1992, 25 (15) :3971-3978
[3]   MODELING THE ELECTROPHORESIS OF RIGID POLYIONS - APPLICATION TO LYSOZYME [J].
ALLISON, SA ;
TRAN, VT .
BIOPHYSICAL JOURNAL, 1995, 68 (06) :2261-2270
[4]   ELECTROPHORESIS OF SPHERES BY A DISCRETIZED INTEGRAL-EQUATION FINITE-DIFFERENCE APPROACH [J].
ALLISON, SA ;
NAMBI, P .
MACROMOLECULES, 1994, 27 (06) :1413-1422
[6]  
ANDERSON JL, 1989, ANNU REV FLUID MECH, V21, P61
[7]  
[Anonymous], 1974, DIELECTRIC PHENOMENA
[8]   THE CATAPHORESIS OF SPHERICAL, SOLID NON-CONDUCTING PARTICLES IN A SYMMETRICAL ELECTROLYTE [J].
BOOTH, F .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1950, 203 (1075) :514-533
[9]   COMPUTATION OF THE ELECTROPHORETIC MOBILITY OF PROTEINS [J].
CHAE, KS ;
LENHOFF, AM .
BIOPHYSICAL JOURNAL, 1995, 68 (03) :1120-1127
[10]   ELECTROPHORESIS OF NONUNIFORMLY CHARGED ELLIPSOIDAL PARTICLES [J].
FAIR, MC ;
ANDERSON, JL .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1989, 127 (02) :388-400