A solid electrolytic capacitor includes an anode element made of a valve action metal, a dielectric oxide film formed on a surface of the anode element, a solid electrolytic layer formed on a surface of the dielectric oxide film, and a cathode layer formed on a surface of the solid electrolytic layer. The instrument has a frame and a mandrel having a distal end and a proximal end. The present invention further relates to compositions that may comprise cupredoxin, andor variants, derivatives or structural equivalents of cupredoxins, that retain the ability to inhibit the development of premalignant lesions in mammalian cells, tissues or animals. The first and second electrodes are comb-shaped. A food item arranged on the tray may be inserted into, or removed from, the inside of the toaster by operating the toaster door.