An image pickup apparatus is disclosed which provides an appropriate inclination guide display in accordance with an aspect ratio of a picked-up image and the like. The movable unit is connected to a stopper of the outer pipe at one end of the outer movable unit and to the linear output unit at the other end. The fumigant compositions also have low toxicity and low Global Warming Potential. Thus, the practitioner is assured of sterilized instruments in a sterilization receptacle, when an intact, color changed sterilization indicator device is within the aperture of the sterilization receptacle. The plural helical flutes are arranged to be meshable with the plural projections or lobes, in a circumferential direction of the first rotating shaft. The system includes a stacked, dual carrousel arrangement to eliminate cross-contamination resulting from reuse of the same buffer tray on consecutive executions from electrophoresis.