The invention relates to a method for removing endotoxins from nucleic acids. Both the sleeve and the tray have a tab on their top portions through which is positioned a hang-hole. When compressing combustion air to a higher density, the combustion air is compressed by a first compressor section to a first preestablished pressure and temperature and by a second compressor section to a second preestablished pressure and temperature. The interface circuit is interposed between the mixer core and the input circuit. When the object is subject to above steps, the gas flow resistance at the transport outlet is controlled such that the active energy beam irradiation is carried out under the condition of XY1, where X represents the gas amount passing through the transport inlet, and Y represents the gas amount passing through the transport outlet. Apertures in the deck permit cords and other items to be inserted therethrough, and a groove on the deck prevents rolling of items.