Theory of electrophoretic focusing on an inverse electromigration dispersion profile

2020 ◽  
Vol 41 (7-8) ◽  
pp. 471-480
Author(s):  
Petr Gebauer
Keyword(s):  
Dispersion Profile ◽  
Electromigration Dispersion

High dispersive TIR-GRISMs with flattened angular dispersion profile

2020 ◽  
Author(s):  
M. Heusinger ◽  
T. Flügel-Paul ◽  
K. Grabowski ◽  
D. Michaelis ◽  
U. D. Zeitner
Keyword(s):  
Angular Dispersion ◽  
Dispersion Profile

Soliton interactions in dispersion-decreasing fibers with the exponential dispersion profile

2013 ◽  
Vol 60 (21) ◽  
pp. 1992-1996 ◽  
Author(s):  
Ren-Xu Jia ◽  
Yu-Cheng Wang ◽  
Wen-Jun Liu ◽  
Ming Lei
Keyword(s):  
Soliton Interactions ◽  
Dispersion Profile

Generation of supercontinuum and frequency comb in a nitrobenzene-core photonic crystal fiber with all-normal dispersion profile

2021 ◽  
Vol 481 ◽  
pp. 126555
Author(s):  
Yanchen Guo ◽  
Jinhui Yuan ◽  
Kuiru Wang ◽  
Haiyun Wang ◽  
Yujun Cheng ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Frequency Comb ◽  
Normal Dispersion ◽  
Dispersion Profile ◽  
Crystal Fiber

Determination of spatial velocity dispersion profile and stream velocity field in galaxy clusters - Application to Coma

1982 ◽  
Vol 252 ◽  
pp. 433 ◽  
Author(s):  
H. V. Capelato ◽  
D. Gerbal ◽  
G. Mathez ◽  
A. Mazure ◽  
E. Salvador-Sole
Keyword(s):  
Velocity Field ◽  
Galaxy Clusters ◽  
Velocity Dispersion ◽  
Stream Velocity ◽  
Dispersion Profile ◽  
Spatial Velocity

scholarly journals Electromigration dispersion in a capillary in the presence of electro-osmotic flow

2012 ◽  
Vol 697 ◽  
pp. 436-454 ◽  
Author(s):  
S. Ghosal ◽  
Z. Chen
Keyword(s):  
Electric Field ◽  
Separation Efficiency ◽  
Chemical Species ◽  
General Situation ◽  
Ion Migration ◽  
Osmotic Flow ◽  
Total Dispersion ◽  
Advection Diffusion Equation ◽  
Electromigration Dispersion ◽  
Electro Osmotic Flow

AbstractThe differential migration of ions in an applied electric field is the basis for the separation of chemical species by capillary electrophoresis. Axial diffusion of the concentration peak limits the separation efficiency. Electromigration dispersion is observed when the concentration of sample ions is comparable to that of the background ions. Under such conditions, the local electrical conductivity is significantly altered in the sample zone making the electric field, and, therefore, the ion migration velocity, concentration dependent. The resulting nonlinear wave exhibits shock-like features and, under certain simplifying assumptions, is described by Burgers’ equation (Ghosal & Chen Bull. Math. Biol., vol. 72, 2010, p. 2047). In this paper, we consider the more general situation where the walls of the separation channel may have a non-zero zeta potential and are therefore able to sustain an electro-osmotic bulk flow. The main result is a one-dimensional nonlinear advection diffusion equation for the area averaged concentration. This homogenized equation accounts for the Taylor–Aris dispersion resulting from the variation in the electro-osmotic slip velocity along the wall. It is shown that in a certain range of parameters, the electro-osmotic flow can actually reduce the total dispersion by delaying the formation of a concentration shock. However, if the electro-osmotic flow is sufficiently high, the total dispersion is increased because of the Taylor–Aris contribution.

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