The invention relates to an optical player and an optical scanning device used therein for scanning an optical information carrier. This change in state can be, for example, a physical squeezing movement or a change in color. In the constitution of the auxiliary device for harvesting pasture, the attaching portion is attached to the front portion of the tractor and a line of collected grass is subject to rolling pressure by rolling of tires in accordance with movement of the tractor. A predetermined bit extension is further inserted within the vacated bit positions adjacent to the shifted data. Compositions for treating hypoxia-induced cardiovascular disorders modulate the SDF-1CXCR4 axis.