A memory includes a plurality of first-in-first-out cells, an output pointer counter, a write training block and a multiplexer. The hydrogen ion-sensitive field effect transistor includes a semiconductor substrate, an insulating layer, a transistor gate, and a sensing film. The catalyst for a partial oxidation reforming reaction of fuel according to the invention makes it possible to progress the partial oxidation reforming reaction of fuel smoothly, to improve the efficiency when reforming the fuel and to simplify the fuel reforming reactor. Each zone of extensibility is a region of the first absorbent layer of relatively higher extensibility than regions of first absorbent layer adjacent to the zone of extensibility.