An integrated circuit 2 is provided with multiple bus masters 4, 6 and multiple bus slaves 8, 10, 12, communicating via a multi-channel communication bus. The hydrogen purification membranes include a metal membrane, which is at least substantially comprised of palladium or a palladium alloy. The device also comprises means for measuring the transit times of transmitted ultrasonic waves and for determining a flow characteristic from the measured transit times. The pivotal front members enable product to be pulled forwardly off the shelf, minimizing the spacing necessary between adjacent shelves. Also disclosed are methods of using such compounds in the treatment of at least one nuclear hormone receptor-associated condition, such as, for example, cancer and immune disorders, and at least one pharmaceutical composition comprising such compounds.