Abstract: An image sensor includes a plurality of pixels. Each pixel includes a photoelectric conversion portion, a reset gate for controlling removal of a charge accumulated in the photoelectric conversion portion, a charge accumulation portion, an accumulation gate for controlling a transfer of the charge from the photoelectric conversion portion to the charge accumulation portion, and a readout gate for controlling readout of the charge from the charge accumulation portion. The reset gate removes the charge generated in the photoelectric conversion portion by excitation light. The accumulation gate transfers the charge generated in the photoelectric conversion portion by fluorescence to the charge accumulation portion. The readout gate performs control for reading out the charge after the charge transfer is performed n times. The number n of the charge transfers is set for each pixel.

Abstract: A process for producing styrene by oxidative dehydrogentation of ethylbenzene, wherein the dehydrogenation of ethylbenzene is conducted through at least the following steps (1) to (3), whereby styrene can be produced in a high yield by controlling the lowering of the selectivity of an oxidation catalyst in hydrogen oxidation by removing an alkaline substance contained in the reaction mixture to be fed to step (2) beforehand: step (1): a step of dehydrogenating ethylbenzene in the presence of a dehydrogenation catalyst to obtain a reaction mixture containing styrene and hydrogen; step (2): a step of bringing the reaction mixture into contact with an oxidation catalyst to selectively oxidize the hydrogen contained in the mixture, thereby forming water; step (3): a step of bringing the oxidized mixture into contact with a dehydrogenation catalyst to dehydrogenate the unreacted ethylbenzene contained in the mixture, thereby obtaining styrene.

Abstract: A method for dehydrogenation of a hydrocarbon, which comprises selectively oxidizing hydrogen in a gas mixture which is obtained by subjecting a feed hydrocarbon to a dehydrogenation reaction in the presence of a dehydrogenation catalyst and which comprises a dehydrogenated hydrocarbon, an unreacted feed hydrocarbon and hydrogen, by contacting the gas mixture with an oxygen-containing gas in the presence of an oxidation catalyst, and further subjecting a hydrocarbon-containing gas obtained by the oxidation reaction to a dehydrogenation reaction, wherein a catalyst comprising a component having platinum and/or palladium supported on a carrier obtained by calcining at least one member selected from the group consisting of tin oxide, titanium oxide, tantalum oxide and niobium oxide, at a temperature of from 800.degree. C. to 1,500.degree. C., is used as the oxidation catalyst.

Abstract: A catalyst for oxidation of hydrogen, which is characterized in that:A. it is a catalyst having platinum supported on alumina;B. said alumina has a BET specific surface area of from 0.5 to 6 m.sup.2 /g; andC. said alumina has an ammonia adsorption of at most 5 .mu.mol/g, is used at the time of producing an unsaturated hydrocarbon by dehydrogenation of a hydrocarbon, whereby hydrogen present in the gas mixture can selectively be oxidized, and thus, the yield can be improved particularly when styrene is produced by dehydrogenation of ethylbenzene.

Abstract: Disclosed herein is a method for the regeneration of a methanol-reforming talyst reduced in activity due to its use in a reaction in which methanol is modified, in the presence of water if necessary, to produce a hydrogen-containing gas. The catalyst contains copper as a principal component and at least one metal selected from the group consisting of zinc, nickel, chromium and aluminum. The method comprises exposing the catalyst to an atmosphere having a temperature of 120.degree.-650.degree. C. and a molecular oxygen concentration not higher than 5 mole %.

Abstract: A catalyst for the production of styrene comprising 40-87.5 % by weight of iron oxide as Fe.sub.2 O.sub.3, 11-50% by weight of cerium oxide as Ce.sub.2 O.sub.3, and 1.5-40% by weight of potassium oxide as K.sub.2 O. By use of the catalyst, styrene can be produced at high conversions and high selectivies under reaction conditions wherein the amount of steam used as a source of heat is reduced.