Abstract: The present invention relates to a polishing composition including water and silica, wherein the silica has a BET specific surface area of 30 m2/g or more and an NMR specific surface area of 10 m2/g or more, and a polishing method using the polishing composition. The polishing composition of the present invention adopts silica having the BET specific surface area falling within the above-described range, and additionally having the NMR specific surface area falling within a specific range, and consequently attains a high polishing rate, and can maintain the polishing rate even when used for a long time.

Abstract: The present invention relates to a polishing composition including water and silica, wherein the silica has a BET specific surface area of 30 m2/g or more and an NMR specific surface area of 10 m2/g or more, and a polishing method using the polishing composition. The polishing composition of the present invention adopts silica having the BET specific surface area falling within the above-described range, and additionally having the NMR specific surface area falling within a specific range, and consequently attains a high polishing rate, and can maintain the polishing rate even when used for a long time.

Abstract: There are no prospects for engines using hydrogen as fuel to be put to practical use due to significant small output, knocking, and backfire. An object of the present invention is to obtain a stable automobile engine at high drive that can be commercially put to practical use. A hydrogen-only 6-stroke engine realizing high output by 6-strokes for premixing two to seven atmospheric pressure or high pressure hydrogen and air at equivalent weight, spraying the pre-mixture into a cylinder cooled by filling the cylinder with cold air in advance, spraying, compressing, and exploding the mixture, discharging the mixture from a lower exhaust hole, and discharging remaining waste gas from an upper exhaust hole is proposed.

Abstract: An object is to improve low fuel efficiency due to heating that is necessary continually during operation in order to continuously produce hydrogen without generating CO2 from methane, and to reduce a heat loss. It is a method of reforming hydrocarbon by an oxyhydrogen flame, in which the oxyhydrogen flame is made from mixed gas of hydrogen and oxygen in a container sealed with an insulating material using a two-tube burner that supplies hydrogen and oxygen, methane pre-heated to 200 to 400° C. is injected into the above-described oxyhydrogen flame from a separate burner, methane is heat-decomposed into hydrogen and carbon powders by rapidly heating to 500 to 1000° C., and a two-tube burner using the oxyhydrogen flame is used so that hydrogen is continuously manufactured without generating CO2 as a byproduct by removing the carbon powders from the heat-decomposed mixed gas.

Abstract: In order to produce hydrogen continuously without generating CO2 from a hydrocarbon gas, continuous heating during operation has been necessary. The present invention is a method of reforming hydrocarbon with an oxyhydrogen flame using a three-tube burner wherein an operation of removing air from an entire apparatus, an operation of making crude hydrogen by heat-decomposing methane, and an operation of producing hydrogen with the crude hydrogen as a fuel are performed, which includes arranging a mesh metal catalyst tube at a tip of an inner tube of a blowpipe and an outer tube of the blowpipe of the burner; covering the metal catalyst tube with a ceramic insulating tube; heating the metal catalyst tube with an oxyhydrogen flame from between the inner tube of the blowpipe and the outer tube of the blowpipe of the burner; and decomposing hydrocarbon from the inner tube of the blowpipe into hydrogen and carbon.

Abstract: An objective is to reform, separate, and extract from a hydrocarbon gas such as methane, ethane, and propane. A method for reforming hydrocarbon gas by oxyhydrogen flame is that hydrogen and carbon are separated from hydrocarbon gas by accommodating a catalyst composed of nickel, platinum, palladium, and carbon in a reformation column surrounded with insulation, directly heating the catalyst to 400 to 650° C. by oxyhydrogen flame, flowing hydrocarbon gas into the inside of the reformation column, and contacting hydrocarbon gas with the heated catalyst, and hydrogen is obtained by cooling the hydrogen.

Abstract: An object of the present invention is to provide a three-dimensional fluoroscopy for continuous stereoscopic observation of a human blood vessel by using a contrast medium, 3-D visualization in nondestructive inspection of materials, baggage check and so on. The present invention also relates to an X-ray bulb for the three-dimensional fluoroscopy.

Abstract: An object of the present invention is to provide a three-dimensional fluoroscopy for continuous stereoscopic observation of a human blood vessel by using a contrast medium, 3-D visualization in nondestructive inspection of materials, baggage check and so on. The present invention also relates to an X-ray bulb for the three-dimensional fluoroscopy. According to the three-dimensional fluoroscopy provided by the present invention, two X-ray beams are irradiated to an object from sources spaced from each other by an interpupillary distance of a human inspector, for projection of alternating X-ray images for the left eye and the right eye on a fluorescent screen for a predetermined exposure time and at a predetermined interval, and the images for the left eye and the images of the right eye are projected on a stereoscopic viewer continuously but independently from each other, thereby providing a three-dimensional fluoroscopic view.

Abstract: A printing process for enabling repeated use of printing paper by printing with ink of diluted iodine tincture solution on the printing paper with starch component exposed on the surface, or by printing letters with paste contained iodine starch and applying diluted sodium thiosulfate (hypo) liquid to the printed surface of the printed matter printed with iodine starch to allow the printing to disappear when the printed matter is reused.