An electronic apparatus, control method thereof, remote control apparatus that controls the electronic apparatus, and control method thereof. The steel is reheated to a temperature for quenching that is not lower than the A1 transformation temperature but lower than the carbonitriding temperature, and then quenched. The measuring probe is coupled to the modulation interferometer via an optical fiber arrangement, and used remotely from the modulation interferometer. In certain embodiments, the lecithin is present in liposomes, micelles, or other vesicles containing nitric oxide.