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The formation of chains of polystyrene spheres in an aqueous suspension submitted to an electric field is studied by light scattering. We analyse the change in the diffraction pattern from an isotropic to a very anisotropic structure. The dynamics of the breakdown of the chains by Brownian motion, when the field is switched off, is studied by recording the decrease of the scattered intensity. The...
Magnetorheological suspensions are complex fluids which show a transition from a liquid behavior to a solid one upon application of a magnetic field. This transition is due to the the attractive dipolar forces between the particles which have been magnetized by the applied field. The formation of a network of particles or aggregates throughout the suspension is the basic phenomena which is responsible...
Synapses are specialised structures where interneuronal communication takes place. Not only brain function is absolutely dependent on synaptic activity, but also most of our organs are intimately controlled by synaptic activity. Synapses re therefore an ideal target to act upon and poisonous species have evolved fascinating neurotoxins capable of shutting down neuronal communication by blocking or...
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