Abstract: The present invention is concerned with a support (1), in particular an optical disc, with a surface structure for the detection of at least one optically-active substance within the evanescent-field (5) at one surface of the support (1), whereby the surface structure allows the generation of an evanescent-field (5) in a medium (2) adjacent to the surface structure. The surface structure comprises one or more sections of the surface of the support (1), which are inclined (?wedge) with respect to the general orientation of the surface of the support (1). The invention also concerns a device employing such a support (1) with a surface structure, in particular an optical disc and uses of the support (1) with a surface structure and the device.

Abstract: A fluid dispensing system comprises an inlet to receive an input fluid and an outlet to dispense an amount of output fluid. A pump is placed between the inlet and the outlet to pump the amount of output fluid to the outlet. The pump includes one or several channels, which are provided with an electrode. A barrier is provided, preferably within the channels to separate the input fluid from the output fluid. The barrier being impermeable for the input and/or output fluids. Preferably, the barrier is formed as a fluid plug that can move along the channels.

Abstract: The invention refers to a tactile device provided with a number of fluid elements (1) containing an electrically conducting fluid (3, 4). The fluid level in each element is movable by actuator means (V, 6) applying a electric power to said fluid elements. Each fluid element is at one end provided with a tactile element (7) that is in contact with the fluid for perception of the fluid level by a user. The fluid elements comprise capillary tubes (2) in which the fluid level is movable as a result of electro-capillary pressure.