In an initial recovery stage of untransferred toner, a conveying stirring screw is rotated at a high speed by using a second driving path. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. Methods of using these compounds as inhibitors of protein synthesis, cell growth, and tumorigenesis and as enhancers of apoptosis are also provided. A frame and line synchronization signal are coupled to the control system from an image frame to be updated to the screen, and the control system is timed based on pulses comprised by the frame and line synchronization signal to input a new image frame to the frame buffer such that the new image frame is not stored onto the image frame being updated. The positioning device may be activated before andor between attempts to pass the guidewires through the chronic total occlusion to interrogate various parts of the chronic total occlusion. The Mach cones are weakened by modifying exhaust gas flow in a longitudinal axial core of the exhaust gas streamtube.