In a high voltage power supplying apparatus, a pulse generation unit generates a pulse signal with a predetermined frequency. The compounds possess good fastness to ultraviolet light, good solubility in vinyl monomers, good color strength and excellent thermal stability. By pushing on the drive levers, the wheelchair is propelled forward. These specific enzymatic reactions trigger the indicator and bind the enzymes to the respective cognate substrates. A method of filling holes using a fill material passing through a pressure fill head includes the steps of causing fill material to enter the fill head, modifying the viscosity of the fill material while it is within the fill head, and causing the modified viscosity fill material to exit the fill head and enter at least one hole. The first set of passageways and second set of passageways being separate and permitting the warm water laden air stream to be cooled by the stream of ambient air so that water can condense out of the warm water laden air stream.