Abstract: A ferrule includes a cylindrical ceramic main body and a metal or plastic back body mated to an end of the ceramic main body. The cylindrical ceramic main body has an axial bore adapted for holding an optical fiber core in fixed relation to the cylindrical ceramic main body. The metal or plastic back body has an axial, central opening adapted for holding a jacketed portion of an optical fiber which terminates through a stepped or sloped end to a smaller axial, central opening adapted for holding an optical fiber core. At the interface between the cylindrical ceramic main body and the metal or plastic back body, the cylindrical ceramic main body has a substantially planar face and a curving central portion that joins the planar face to the axial bore of the cylindrical ceramic body.

Abstract: A disinfectant composition comprising as active ingredients 4-(2,2-difluoro-1,3-benzo-dioxol-4-yl)pyrrole-3-carbonitrile and penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate exhibits high synergistic effect by the joint use of the two active ingredients and has remarkably high effect in a low amount against Bakanae disease, blast, leaf spot, loose smut, Septoria leaf blight, snow mold on cereals such as rice, wheat, barley etc.