Electrokinetic Studies on Fibrinogen. V. The Determination of the Isoelectric Point by the Streaming Potential Method

1955 ◽  
Vol 59 (3) ◽  
pp. 266-270 ◽  
Author(s):  
Takeshi Abe ◽  
Erwin Sheppard ◽  
Irving S. Wright
Keyword(s):  
Isoelectric Point ◽  
Streaming Potential ◽  
Potential Method

The Determination of Electrokinetic Coupling-Coefficient and Zeta Potential of Rock Samples by Electrokinetic Measurements

2012 ◽  
Vol 516-517 ◽  
pp. 1870-1873 ◽  
Author(s):  
Jun Wang ◽  
Heng Shan Hu
Keyword(s):  
Zeta Potential ◽  
Coupling Coefficient ◽  
Streaming Potential ◽  
Potential Method ◽  
Surface Conductivity ◽  
Reliable Estimate ◽  
Surface Conductance ◽  
Streaming Current ◽  
Low Concentrations

The electrokinetic effects are important in the understanding of electric properties in porous medium. In this study, the streaming potential and streaming current of saturated samples are measured at different concentrations, then three methods are applied to obtain the zeta-potential and electrokinetic coupling coefficient. The study shows that the results obtained from streaming potential and streaming current methods agree well with each other, but the results obtained from simplified streaming potential method become seriously inaccurate at low concentrations due to the influence of surface conductance. This experimental study also provides a reliable estimate of the surface conductivity and its contribution to zeta-potential at given concentrations.

Determination of the surface potential for hollow-fiber membranes by the streaming-potential method

2017 ◽  
Vol 79 (5) ◽  
pp. 677-684 ◽  
Author(s):  
V. D. Sobolev ◽  
A. N. Filippov ◽  
T. A. Vorob’eva ◽  
I. P. Sergeeva
Keyword(s):  
Surface Potential ◽  
Hollow Fiber ◽  
Streaming Potential ◽  
Potential Method ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Some Unexpected Results in the Stress Calculation Around Multiple Holes in an Isotropic Plate Under In-Plane-Loads

2014 ◽  
Author(s):  
Ghazi H. Asmar ◽  
Elie A. Chakar ◽  
Toni G. Jabbour
Keyword(s):  
Finite Element ◽  
Isotropic Plate ◽  
Potential Method ◽  
The Finite Element Method ◽  
Close Proximity ◽  
Complex Fourier Series ◽  
Circular Holes ◽  
Complex Potential Method ◽  
Multiple Holes

The Schwarz alternating method, along with Muskhelishvili’s complex potential method, is used to calculate the stresses around non-intersecting circular holes in an infinite isotropic plate subjected to in-plane loads at infinity. The holes may have any size and may be disposed in any manner in the plate, and the loading may be in any direction. Complex Fourier series, whose coefficients are calculated using numerical integration, are incorporated within a Mathematica program for the determination of the tangential stress around any of the holes. The stress values obtained are then compared to published results in the literature and to results obtained using the finite element method. It is found that part of the results generated by the authors do not agree with some of the published ones, specifically, those pertaining to the locations and magnitudes of certain maximum stresses occurring around the contour of holes in a plate containing two holes at close proximity to each other. This is despite the fact that the results from the present authors’ procedure have been verified several times by finite element calculations. The object of this paper is to present and discuss the results calculated using the authors’ method and to underline the discrepancy mentioned above.

scholarly journals Determination of Thallium(I) by Hybrid Mesoporous Silica (SBA-15) Modified Electrode

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Geeta Rani ◽  
Sanjay Singh
Keyword(s):  
Mesoporous Silica ◽  
Potential Method ◽  
Selectivity Coefficient ◽  
Indicator Electrode ◽  
Carbon Paste ◽  
Chemically Modified ◽  
Best Response ◽  
Edta Solution ◽  
Paste Electrode

Chemically modified mesoporous silica material (SBA-15) was used for the construction of Tl(I) selective carbon paste electrode. The best response was found with the electrode containing 10% modifier as electrode material. The electrode has a lower detection limit of 6.0 × 10−9 M in a working concentration range of 1.0 × 10−8–1.0 × 10−1 M. The selectivity coefficient calculated by match potential method (MPM) shows the high selectivity of electrode towards Tl(I) over other tested ions. The electrode was successfully applied as an indicator electrode for the titration of 0.01 M TlNO3solution with standards EDTA solution and for sequential titration of mixture of different anions.

The Determination of the Isoelectric Point.

1933 ◽  
Vol 37 (4) ◽  
pp. 417-424 ◽  
Author(s):  
Lyle Vernon Andrews ◽  
D. J. Brown
Keyword(s):  
Isoelectric Point
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