Abstract: A first member and a second member of a hinge unit are rotatably connected to each other via a rotation shaft. The first member includes a support portion. The first member is connected to an end edge portion of a first structure slidably in a predetermined sliding direction, and the second member is connected to an end edge portion of a second structure. An urging member is disposed between the support portion and the first structure. When transitioning from a folded state to a deployed state, the urging member urges and moves the first structure in the sliding direction toward the second structure, and at least a part of the hinge unit sinks into an inside from an outside of the first structure.

Abstract: Conductive layers have at least a portion of a conductive member arranged in a nonlinear or polygonal configuration and having a greater layout area and an insulating layer is alternately stacked relative to the conductive layer, wherein a variation in amount of the conductive member at the conductive layer with a middle of a board thickness direction as a reference is set in a range in which a warp is less likely to be produced and in a range near to zero.

Abstract: Novel compound of the following formula ##STR1## wherein X is a member selected from the group consisting of carboxy and carbalkoxy and each or R.sub.1, R.sub.2 and R.sub.3 is a member selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, alkoxy, hydroxy, halo, amino, alkylamino, alkylmercapto, nitro, cyano, alkylsulfonyl, carboxy, carbalkoxy, hydroxyalkyl, aminoalkyl, hydroxyalkylamino, and acetoxyalkylamino, and pharmaceutically acceptable acid addition salts thereof.The above compound can be prepared by heating a 3-(substituted amino)-acridine to cyclize said compound, and if desired, hydrolyzing the resulting product and/or it with an acid.