A semiconductor capacitance device includes a P-type semiconductor layer, an N-type well region which is provided in the P-type semiconductor layer, and a P-type well region which is provided in the N-type well region. The temperature of the shields is controlled such that baseline curvature is reduced by eliminating heat flow from the furnaces to their surroundings and by controlling heat flow through a well defined solid state heat resistance between the furnaces and a temperature controlled heat sink. The power recovery unit includes an inductor coupled between the first electrode and a capacitor, and increasesdecreases the voltage of the first electrode by electrically coupling the inductor and the capacitor. The selected LEDs are mounted in the display assembly to illuminate the display screen. In particular, a nucleic acid construct comprising a hCEF1 promoter operably linked to a sequence for expression is provided, where the hCEF1 promoter comprises: a human CMV enhancer operably linked to a human EF1 a promoter; a functional fragment of ; or a functional variant of or. The microfluidic device includes: a platform including: a sample injection hole, at least one chamber configured to accommodate a sample introduced through the sample injection hole, at least one channel connected to the at least one chamber; and a cover disposed over the sample injection hole, wherein a gap is disposed between the sample injection hole and the cover.