Disclosed are soft, high refractive index, acrylic device materials. The device includes a set of information sources and a section for determining, with the aid of information emanating from the set of information sources, a current bending moment. Furthermore, a brake fluid container can be accessible through the maintenance opening for level monitoring andor for topping up brake fluid, as can a hydraulic oil filter. Methods are disclosed for assay and purification of the enzyme, as well as procedures for using the purified enzyme in screening protocols for the identification of possible anticancer agents which inhibit the enzyme and thereby prevent expression of proteins such as p21ras. The solenoid actuator is formed by a monolithic assembly obtained in a mould, in which there is injected, on a core and a coil coupled to one another, a plastic material, which defines, once it has solidified, a body for insulation of the core from the injector body and which forms, once it has solidified, a monolithic assembly with the core and the coil. An interconnect structure includes at least one flow channel initially defined by a removable sacrificial material.