Ozone laundry systems are disclosed. In this electron beam system, an electron beam emitted from an electron gun is irradiated onto a sample and secondary electrons emanated from the sample are detected. The lead wire is led to the interior of a frame. Also provided is a widget dock to display and contain the dock tile on a display screen, and the dock tile is linked by a functional association to the widget. The rinse solution from a second rinse tank of the step P6 is re-used. The present invention relates to a compound represented by formula :and an antioxidant, a glucosidase inhibitor, a food, a cosmetic, and a skin preparation for external use, each of which comprises such compound.