92168.pdf
192 Charged interfaces the cell wall. For a flat cell the 'stationary levels' are located at fractions of about 0.2 and 0.8 of t ...
Charged interfaces 193 measurement; if a rectangular cell is adapted for horizontal viewing (see Figure 7.5), sedimenting partic ...
194 Charged interfaces -75 -50 ~o 1 -25 £o a. +25- (b) 10 -6 -4 .o E o Q. O Figure 7.7 Zeta potentials (calculated from electrop ...
Charged in terfaces 195 Boundary Buffer solution—^1 * Boundary V 8 I 1 ^ ^ 1 Protein — solution Horizontal cross-section Figure ...
196 Charged interfaces If the protein solution consists of a number of electrophoretically different fractions, the sharp peak c ...
Charged interfaces 197 The particularly high resolving power of moderately concentrated gel media is to a large extent a consequ ...
198 Charged interfaces Compressed air Figure 7.10 A streaming potential apparatus^93 (By courtesy of Academic Press Inc.) be gen ...
Charged interfaces 199 Reversible working electrodes Perforafed platinum measuring electrodes Figure 7.11 An electro-osmosis app ...
200 Charged interfaces The Huckel equation (small KO) Consider KO to be small enough for a spherical particle to be treated as a ...
Charged interfaces 201 E is applied parallel to the surface. Each layer of liquid will rapidly attain a uniform velocity relativ ...
202 Charged interfaces It follows from this expressioin that the electrophoretic mobility of a non-conducting particle for which ...
Charged interfaces 203 are assumed to be simply superimposed. Mutual distortion of these fields could affect electrophoretic mob ...
204 Charged interfaces conductivity in the mobile part of the double layer can be calculated (and is allowed for in the treatmen ...
Charged interfaces 205 Permittivity and viscosity are constant throughout the mobile part of the double layer, which is describ ...
206 Charged interfaces Figure 7.13 Electrophoretic mobility and zeta potential for spherical colloidal particles in electrolyte ...
Charged interfaces 20? and Hunter^193 suggest, however, that the viscoelectric effect was overestimated by Lyklema and Overbeek ...
208 Charged interfaces epA£ /s=-^ (7.29) 7)/ where A is the cross-sectional area of the capillary. The streaming current and the ...
Charged interfaces 209 Electro-osmosis Experimentally, it is the volume flow rate which is measured. For a single capillary of c ...
8. Colloid stability A most important physical property of colloidal dispersions is the tendency of the particles to aggregate. ...
Colloid stability 211 Table 8.1 Critical coagulation concentrations (in millimoles per dm^3 ) for hydrophobic sols^96 (By courte ...
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