Abstract: A method for performing selective bacteriostasis of a sulfate-reducing bacterium, the method selectively inhibiting proliferation of the sulfate-reducing bacterium by allowing chelated Al to coexist in an environment where the sulfate-reducing bacterium exists, and a gypsum composition containing calcined gypsum (A) and chelated Al (B), in which the chelated Al (B) is contained in a range of 0.01 to 20 mass parts relative to 100 mass parts of the calcined gypsum (A).

Abstract: A method for performing selective bacteriostasis of a sulfate-reducing bacterium, the method selectively inhibiting proliferation of the sulfate-reducing bacterium by allowing chelated Al to coexist in an environment where the sulfate-reducing bacterium exists, and a gypsum composition containing calcined gypsum (A) and chelated Al (B), in which the chelated Al (B) is contained in a range of 0.01 to 20 mass parts relative to 100 mass parts of the calcined gypsum (A).

Abstract: Each of game machines sends result information indicating an individual ID and play result to a server. The server has a common ID control file and an individual game control file, which store common points, a common ID and an individual ID, associated with each other. A CPU converts the result information into common points, and allows the converted common points to be reflected in the common points in the common ID control file corresponding to the individual ID.

Abstract: Each of game machines sends result information indicating an individual ID and play result to a server. The server has a common ID control file and an individual game control file, which store common points, a common ID and an individual ID, associated with each other. A CPU converts the result information into common points, and allows the converted common points to be reflected in the common points in the common ID control file corresponding to the individual ID.

Abstract: Each of game machines sends result information indicating an individual ID and play result to a server. The server has a common ID control file and an individual game control file, which store common points, a common ID and an individual ID, associated with each other. A CPU converts the result information into common points, and allows the converted common points to be reflected in the common points in the common ID control file corresponding to the individual ID.

Abstract: A current breaker circuit by which currents flowing in loads respectively connected to a plurality of storage devices connected in series are broken in accordance with a single external control signal. The current breaker circuit includes semiconductor switching devices inserted between the storage devices and the loads respectively, a unit for supplying the external control signal to at least one of the semiconductor switching devices, and control signal generating units for generating ON/OFF signals in accordance with turning ON/OFF of the semiconductor switching device supplied with the external control signal so as to supply the ON/OFF signals to the other semiconductor switching devices.

Abstract: Each of game machines sends result information indicating an individual ID and play result to a server. The server has a common ID control file and an individual game control file, which store common points, a common ID and an individual ID, associated with each other. A CPU converts the result information into common points, and allows the converted common points to be reflected in the common points in the common ID control file corresponding to the individual ID.

Abstract: A current breaker circuit by which currents flowing in loads respectively connected to a plurality of storage devices B1 to B4 connected in series are broken in accordance with a single external control signal. The current breaker circuit includes semiconductor switching devices Q1 to Q4 inserted between the storage devices and the loads respectively, a unit S for supplying the external control signal to at least one of the semiconductor switching devices, and control signal generating units q1 to q3 for generating ON/OFF signals in accordance with turning ON/OFF of the semiconductor switching device supplied with the external control signal so as to supply the ON/OFF signals to the other semiconductor switching devices.

Abstract: Microorganisms of the genus Thiobacillus find utility in the mining industry in such applications as bacterial leaching, the treatment of mine drainage water and the deiron in hydrometallurgy process. This invention discloses a DNA fragment which codes for a mercuric reductase in microorganisms of the genus Thiobacillus and is useful in constructing a new strain of Thiobacillus ferrooxidans capable of fast growth. A recombinant plasmid incorporating the DNA fragment, a shuttle vector plasmid incorporating the DNA fragment, host cells and a method of transforming the host cells are also disclosed.