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Schematic representation of the different instabilities in emulsions. A) creaming or sedimentation due to the density mismatch between the drops and the continuous phase; B) flocculation (aggregation) followed by creaming (O/W emulsions); C) Ostwald ripening (Diffusion of dispersed molecules from small droplets to large ones across the continuous phase, because of the difference in Laplace Pressure); D) coalescence (the drops recombine ultimately leading to the total phase separation of the two immiscible phases).
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