17Electric-field-induced structuring of kaolinite and halloysite particles was studied in respect to 18 their electrorheological (ER) response in silicone oil and in paraffin dispersions. The 19 structural and morphological properties of both clay minerals were studied by XRD, FTIR, 20 SEM, TEM and TGA techniques. The dipolar arrangement induced under application of an 21 electric field was investigated by 2D-WAXS and optical microscopy techniques. The ER 22 response of the samples was measured by both the shear rate controlled method and 23 bifurcation tests. Kaolinite particle dispersions were found to have an improved ER response 24 relative to dispersions of halloysite particles. Finally, the electric currents of these ER fluids 25were measured and the results revealed differences in the current-magnitude between 26 halloysite-and kaolinite-based silicone oil dispersions. 27 28 29

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The response of an uncatalyzed bromate oscillator with phenol as substrate to the increasing concentrations of cationic (CTAN), anionic (SDS) and nonionic surfactants (Brij-30 and Triton X-100) was monitored at (25±0.1) °C under stirred batch conditions. Addition of the surfactants influenced the oscillatory parameters: a slight increase of the induction period of the first series of oscillations, a significant increase of the induction period of the second series of oscillations and a gradual decrease of the oscillation numbers of both series until complete disappearance at a certain surfactant concentration. The changes in the oscillatory parameters have been ascribed to solubilization of phenol and of bromination products in the micelles, to inhibition of bromination of the aromatic substrate due to bromine solubilization, and to the catalytic effect of the charged micelle surface.