A method for whitening a dental surface comprises nonsimultaneously applying a whitening composition to the surface, the whitening composition comprising at least one orally acceptable peroxy compound, and directing a volume of up to about 2. The programmed memory cell is verified based on a first threshold state if leakage current is determined to pass through one or more neighboring memory cells. Alternatively, the shaft can be formed as a titanium member and the end of the shaft can be directly electron-beam welded to the wheel. Flags are set and stored with packed partial results to identify denormal elements. The system includes a fuel charged portion in which the power generation fuel is charged, a power generator which generates power generation electric power by using the power generation fuel, an output controller which operates or stops the power generator and, a start-up controller which supplies start-up electric power used for operating the output controller to the output controller. In particular, the invention relates to a cell surface protein which contains certain classical cadherin characteristics, but it exhibits an apical distribution pattern on the surface of lymphocytes.