Abstract: A planar transformer includes: a first primary coil in a first layer of a printed circuit board (PCB); a first secondary coil in one or more second layers in the PCB; and a second secondary coil in the one or more second layers.

Abstract: The present invention relates to a nucleic acid aptamer capable of binding to tebuconazole, mefenacet or inabenfide, and the use thereof, and more particularly, to a nucleic acid aptamer capable of binding specifically to a very small amount of tebuconazole, mefenacet or inabenfide, and a method of detecting and separating tebuconazole, mefenacet or inabenfide using the nucleic acid aptamer. The nucleic acid aptamer of the present invention, which can bind specifically to tebuconazole, mefenacet or inabenfide, enables the detection and separation of tebuconazole, mefenacet or inabenfide present in samples such as food in very small amounts, and thus is effective for the detection and removal of tebuconazole, mefenacet or inabenfide which was difficult to detect in the prior art.