1. Electrochemistry of Oil-Water Interfaces.- 1. Potential Difference at Oil-Water Interfaces.- 1.1. Equilibrium.- 1.2. Nernst Potential.- 1.3. Surface and Interfacial Potential.- 1.4. Diffusion Potential.- 2. Electrocapillarity.- 2.1. Thermodynamics of Electrocapillarity.- 2.2. Electrocapillarity at Oil-Water Interfaces.- 2.3. Adsorption at Oil-Water Interfaces.- 2.3.1. Poissons Equation.- 2.3.2. Conservation of Energy.- 2.3.3. Adsorption Isotherm.- 2.3.4. Calculation of Adsorption.- 2.4. Mechanism of the Decrease in Interfacial Tension by Applying Potential.- 3. Binding at Oil-Water Interfaces.- 3.1. Counterion Binding.- 3.2. Hydrogen Ion Binding.- 3.3. Competing Binding.- 3.4. Stern Effect.- 3.5. Mixed Adsorption.- 4. Electrocapillary Emulsification.- 4.1. General Principles.- 4.2. Condition of Emulsification.- 4.3. Stability and Droplet Size Distribution.- 4.4. Mechanism of Electrocapillary Emulsification.- 5. Coalescence of Droplets.- 5.1. DLVO Theory and Coalescence of Mercury Droplets.- 5.2. Coalescence of Aqueous Drops in Oil Phase.- 5.3. Bridge Formation between Water Droplets.- 5.4. Protection by Organic Materials.- 6. Potential Distribution of Membrane Systems.- 6.1. Donnan Membrane Potential.- 6.2. Bi-Ionic Potential.- 6.3. Membrane Potential Difference.- Abbreviations.- Notation.- References.- 2. Kinetic Theory of Flotation of Small Particles.- 1. Specific Features of the Mechanism Involving Fixation of Small Particles on the Surface of a Bubble.- 2. Specific Features of the Mechanism of Transfer of Small Particles to the Bubble Surface.- 3. Quantitative Theory of Flotation of Small and Medium-Sized Spherical Particles.- 4. Quantitative Experimental Research into Flotation of Small Particles.- 5. Detachment of Small Particles in Contactless Flotation and the Dynamic Adsorption Layer of a Bubble.- 6. Nonequilibrium Surface Forces in Flotation.- 7. Collision Efficiency and Flotation Kinetics.- 8. Influence of Aggregation of the Particles on the Elementarl£¡