Electrophoretic Mobility of a Colloidal Particle with Constant Surface Charge Density

Langmuir ◽  
2010 ◽  
Vol 26 (23) ◽  
pp. 18016-18019 ◽  
Author(s):  
Kimiko Makino ◽  
Hiroyuki Ohshima
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Electrophoretic Mobility ◽  
Surface Charge Density ◽  
Colloidal Particle

The ζ-Potential of Kaolinite Particles

1956 ◽  
Vol 9 (4) ◽  
pp. 450 ◽  
Author(s):  
N Street ◽  
AS Buchanan
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Electrophoretic Mobility ◽  
Surface Charge Density ◽  
Considerable Increase ◽  
Ionic Species ◽  
Ζ Potential ◽  
Potentiometric Titrations ◽  
Kaolinite Suspension

Electrophoretic mobility measurements, and both conductometric and potentiometric titrations, were carried out on a kaolinite suspension throughout its neutralization by various bases. The concentration of the ionic species present was calculated from the conductometric and potentiometric titrations, and the true ζ-potential calculated from the electrophoretic mobility by Stigter and Mysels's (1955) method. The results indicate that a discontinuity exists in the adsorption of ions in the vicinity of pH 6.5-7.0 causing a considerable increase in the surface charge density of the particles.

Electrophoretic Mobility and Primitive Models:  Surface Charge Density Effect

2002 ◽  
Vol 106 (27) ◽  
pp. 6881-6886 ◽  
Author(s):  
A. Martín-Molina ◽  
M. Quesada-Pérez ◽  
F. Galisteo-González ◽  
R. Hidalgo-Álvarez
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Electrophoretic Mobility ◽  
Surface Charge Density ◽  
Density Effect

scholarly journals Electrophoretic Mobility and N-Acetyl Neuraminic Acid Content of Human Normal and Leukemic Lymphocytes and Granulocytes

Blood ◽  
1970 ◽  
Vol 35 (1) ◽  
pp. 12-22 ◽  
Author(s):  
MARSHALL A. LICHTMAN ◽  
ROBERT I. WEED
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Area ◽  
Electrophoretic Mobility ◽  
Surface Charge Density ◽  
Human Leukocyte ◽  
Neuraminic Acid ◽  
Cell Periphery ◽  
Neuraminidase Treatment ◽  
Molecular Arrangement

Abstract Studies have been conducted to determine the electrophoretic mobility and the N-Acetyl Neuraminic Acid (NANA) content of different human leukocyte types. Leukemic granulocytes and lymphocytes do not differ significantly from their normal counterparts in rate of electrophoretic mobility. An absolute comparison between leukemic and normal myeloblasts could not be made; however, populations of leukemic myeloblasts were often similar in mobility to normal immature granulocytes. Immature granulocytes had a significantly higher surface-charge density than PMNGs, and this is due primarily to differences in NANA carboxyl groups contributing to the electro-kinetic surface of the cell. The small lymphocyte has a surface-charge density more similar to that of immature granulocytes and myeloblasts than to that of PMNGs. The surface-dependent behavior of different leukocyte types may be related, in part, to the density or arrangement of NANA molecules at the cell periphery; alternatively, the distribution of surface NANA may be a reflection of other differences in molecular arrangement of the cell membrane which are important in determining functional capacities. Total cellular NANA is greater in the PMNG than the lymphocyte, and this is likely to be a reflection of the larger surface area of external and internal membranes of the PMNG. These data also suggest that the surface area of the PMNG and lymphocyte is not reflected by the assumption of a smooth sphere. Neither total NANA nor neuraminidase-susceptible NANA can be used as an estimate of comparative NANA-dependent surface-charge density which must depend on electrophoretic mobility measurements with and without neuraminidase treatment.

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