Abstract: A disk device includes a magnetic disk, a magnetic head, a flexible printed circuit board, an electronic component, and a wall. The flexible printed circuit board is electrically connected to the magnetic head. The electronic component is mounted on the flexible printed circuit board. The wall has rigidity higher than the flexible printed circuit board and is attached to the flexible printed circuit board. The flexible printed circuit board with a first through hole includes a first surface facing the electronic component with a gap, and a second surface opposite the first surface and facing the wall, the first through hole being open to the first surface and the second surface to communicate with the gap. The wall is provided with a second through hole penetrating the wall to communicate with the first through hole.

Abstract: Food compositions which comprise, as an active ingredient, an extract of migratory fish or a mixture of nutritional components of a similar composition to the above-mentioned extract in an amount of 0.5 g or more per one meal of the extract or the mixture in terms of the solid content thereof are effective for treating and/or preventing stress and stress-related conditions. With such food compositions it is possible to prevent or alleviate states such as fatigue e.g., asthenopia, mental fatigue, emotional dysfunction and the like, caused by stress and felt on a daily basis.

Abstract: It is intended to provide a sterol composition and a fat/oil composition, which have a higher effect of lowering the cholesterol level than commercially available phytosterol containing &bgr;-Sitosterol as a main component, and to provide foods containing the above compositions.