An efficient device for capturing fast moving particles has an adhesive particle shield that includes a mounting panel and a film that is attached to the mounting panel wherein the outer surface of the film has an adhesive coating disposed thereon to capture particles contacting the outer surface. In accordance with one embodiment of the invention, the device also includes a display screen proximately disposed near the bottom end of the device, and a plurality of input keys proximately disposed near said top end of the device above the input display screen. When additional styrene monomers are added during the polymerization, they are added and adsorbed to styrene resin particles in the course of polymerization while the concentration of oxygen is kept low. The present invention also pertains to ethyl 4-butyrate represented by the formula, CH3COS3COOCH2CH3. The structure, in which a Bragg diffraction grating is formed in such protruding part of the optical fiber on said mounting surface, can prevent the occurrence of a change in reflective characteristic of the Bragg diffraction grating.