Abstract: Provided is a cancer stem cell mass from which cells incapable of forming cancer are substantially removed and which has a characteristic property of reproducing a layered structure of a cancer tissue; a process for producing the cancer stem cell mass; and use of the cancer stem cell mass. A human cancer tissue was repeatedly grown in a NOG mouse, separated cancer cells from the grown cancer tissue, and tested and compared various cancer cell culture processes. As a result, a cancer stem cell composition which is homogeneous and is substantially free of the coexistence of cells capable of forming cancer and cells incapable of forming cancer in a mixed state can be produced successively by employing an attached culture process using a serum-free stem cell culture medium rather than a generally employed floating culture process.

Abstract: A double floor member is provided with: a guide rail 24 affixed to the upper face side; a first connection member 27 movable in the longitudinal direction of the guide rail 24 and engaged with the guide rail 24 so as not to be dislodged upward from the guide rail 24; and a second connection member 34 connected to the first connection member 27 so as not to lift upward from the first connection member 27. The second connection member 34 can be moved in a direction different from the longitudinal direction of the guide rail 24 by horizontally moving the position where the second connection member 34 is connected to the first connection member 27.

Abstract: A double-floor member includes at least one first guide rail (24) that is fixed to an upper surface and at least one first connecting member (27) that is movable in the longitudinal direction of the first guide rail (24) and is engaged with the first guide rail (24) so as not to be separated upward from the first guide rail (24).

Abstract: A double floor member is provided with: a guide rail 24 affixed to the upper face side; a first connection member 27 movable in the longitudinal direction of the guide rail 24 and engaged with the guide rail 24 so as not to be dislodged upward from the guide rail 24; and a second connection member 34 connected to the first connection member 27 so as not to lift upward from the first connection member 27. The second connection member 34 can be moved in a direction different from the longitudinal direction of the guide rail 24 by horizontally moving the position where the second connection member 34 is connected to the first connection member 27.

Abstract: In a floor panel provided with upper and lower members which have concave spaces and side surfaces having heights and are formed as a box shape, and structured such that the upper and lower members are combined up and down so as to communicate the respective concave spaces so as to form an internal space in an inner portion, the floor panel has a joint portion in which height leading end portions of the side surfaces of the upper and lower members are folded so as to enwrap each other so as to be connected, and the joint portion is arranged in a height midstream portion of the side surface of the floor panel, and is arranged at a position which is retreated to an inner side of the floor panel in relation to the side surface in both height end sides of the floor panel.

Abstract: A double-floor member includes at least one first guide rail (24) that is fixed to an upper surface and at least one first connecting member (27) that is movable in the longitudinal direction of the first guide rail (24) and is engaged with the first guide rail (24) so as not to be separated upward from the first guide rail (24).

Abstract: The invention provides a floor panel which can reduce a material cost and achieve a weight saving, by easily carrying out a press drawing process. In a floor panel in which an upper member and a lower member are joined in their peripheral edge portions and an internal space is formed in an inner portion of the floor panel, an opening portion intruding approximately as a rectangular shape into an inner side of the floor panel is formed in a side plate portion of each of the upper member and the lower member, and a shape of the opening portion is formed as such a curved shape that two internal corner portions intrude into the inner side of the floor panel than the other approximately linear portions than the internal corner portions, in a whole or a part of a horizontal cross section.

Abstract: In a lid member having a long and short edge plate portions which are adjacent to each other, and approximately formed as an L-shaped form in its cross section, the long edge plate portion has a plurality of first groove portions which extend approximately in parallel to a ridge line portion which is held in common with the short edge plate portion adjacent in a width direction so as to be arranged side by side while being spaced from each other, and are formed so as to be concaved to a back side in a thickness direction in relation to an upper surface, and a plurality of second groove portions which are formed so as to be concaved to the back side in the thickness direction in relation to the upper surface, and are connected both end portions in a length direction respectively to a plurality of first groove portions.

Abstract: The invention provides a floor panel which can prevent the cable such as the wiring arranged in the space between the floor panel and the floor surface from being damaged due to the contact with the leading end angled portion of the floor panel, and can prevent a manufacturing cost from being increased on the basis of its simple structure. In a floor panel (40) provided with a plate-like top plate portion (44) which has a plane portion and four edges in a peripheral portion thereof, and a plurality of side plate portions (46) which are formed by being folded from the four edges, and supported to a support table (6) so as to construct a free access floor (42), the side plate portions (46) are folded and folded portions (46c) are formed in lower end portions of the side plate portions (46).

Abstract: The invention provides a floor panel which can reduce a material cost and achieve a weight saving, by easily carrying out a press drawing process. In a floor panel in which an upper member and a lower member are joined in their peripheral edge portions and an internal space is formed in an inner portion of the floor panel, an opening portion intruding approximately as a rectangular shape into an inner side of the floor panel is formed in a side plate portion of each of the upper member and the lower member, and a shape of the opening portion is formed as such a curved shape that two internal corner portions intrude into the inner side of the floor panel than the other approximately linear portions than the internal corner portions, in a whole or a part of a horizontal cross section.

Abstract: In a floor panel provided with upper and lower members which have concave spaces and side surfaces having heights and are formed as a box shape, and structured such that the upper and lower members are combined up and down so as to communicate the respective concave spaces so as to form an internal space in an inner portion, the floor panel has a joint portion in which height leading end portions of the side surfaces of the upper and lower members are folded so as to enwrap each other so as to be connected, and the joint portion is arranged in a height midstream portion of the side surface of the floor panel, and is arranged at a position which is retreated to an inner side of the floor panel in relation to the side surface in both height end sides of the floor panel.

Abstract: In a lid member having a long and short edge plate portions which are adjacent to each other, and approximately formed as an L-shaped form in its cross section, the long edge plate portion has a plurality of first groove portions which extend approximately in parallel to a ridge line portion which is held in common with the short edge plate portion adjacent in a width direction so as to be arranged side by side while being spaced from each other, and are formed so as to be concaved to a back side in a thickness direction in relation to an upper surface, and a plurality of second groove portions which are formed so as to be concaved to the back side in the thickness direction in relation to the upper surface, and are connected both end portions in a length direction respectively to a plurality of first groove portions.

Abstract: A vibration damping floor structure for reducing vibrations and shocks applied to a building. The vibration damping floor structure includes a frame structure formed by connecting a plurality of frames, a plurality of ball bearing supports formed on predetermined locations of the frame structure, and a plurality of ball bearings formed on each ball bearing support. Each bearing support is structured so that all of the ball bearings can contact the floor by adjusting the height and following the inclination of the floor.

Abstract: A vibration damping floor structure for reducing vibrations and shocks applied to a building. The vibration damping floor structure includes a frame structure formed by connecting a plurality of frames, a plurality of ball bearing supports formed on predetermined locations of the frame structure, and a plurality of ball bearings formed on each ball bearing support. Each of the bearing support includes means for following an inclination of a floor surface of the building and means for adjusting height, thereby contacting all of the ball bearings with the floor surface of the building.

Abstract: A free access floor comprising a plurlaity of units juxtaposed to both traversing and vertical direction, each unit comprising two right-angled triangular plates and first, second and third rectangular covers. Two triangular plates are so arranged to constitute a rectangle by facing their hypotenuses to each other. Two other side of each triangular plate have steps. Each triangular plate has three legs at its corners. The first, second and third rectangular covers are rested on the steps of the triangular plates. The triangular plate can be formed as a right-angled isosceles triangle, the first and the second rectangular covers can be formed as identical, and the third rectangular cover can be formed as a square. Each unit can be so arranged that the hypotenuses of the triangular plates of the adjacent unit are mirror symmetrical to each other. All legs gathering to the corners of each third rectangular cover can be grasped by each retainer.