Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: A process for producing a 1,2-diol through the reaction of an olefin with hydrogen peroxide. The process is highly efficient and highly selective and catalyst recovery and reuse are easy. It does not use any strong acid or strong base causative of apparatus corrosion. The process for producing a 1,2-diol is characterized by reacting an olefin with hydrogen peroxide in the presence of a polymer having a sulfo group.

Abstract: An aldehyde-containing oily solution and an aqueous hydrogen peroxide solution are reacted in the presence of a catalyst comprising a polymer compound having a sulfonic acid group in a side chain thereof in a heterogeneous solution system. According to such a reaction process, carboxylic acid can be efficiently produced under mild conditions having very little influence and toxicity on the environment and a human body, with simple operations, without requiring the operation for removing a solvent after the completion of the reaction.

Abstract: An aldehyde-containing oily solution and an aqueous hydrogen peroxide solution are reacted in the presence of a catalyst comprising a polymer compound having a sulfonic acid group in a side chain thereof in a heterogeneous solution system. According to such a reaction process, carboxylic acid can be efficiently produced under mild conditions having very little influence and toxicity on the environment and a human body, with simple operations, without requiring the operation for removing a solvent after the completion of the reaction.

Abstract: A process for producing a 1,2-diol through the reaction of an olefin with hydrogen peroxide. The process is highly efficient and highly selective and catalyst recovery and reuse are easy. It does not use any strong acid or strong base causative of apparatus corrosion. The process for producing a 1,2-diol is characterized by reacting an olefin with hydrogen peroxide in the presence of a polymer having a sulfo group.

Abstract: At least two (groups of) sensors forming an insertion detection sensor are offset from each other in the conveyance direction of a photosensitive material. An insertion speed, which is different for each manual insertion event, is obtained based on the time difference when sensors that have been offset from each other detect the leading end of the photosensitive material. The length of the photosensitive material in the conveyance direction thereof is accurately computed based on the insertion speed and other information. By correcting the errors due to the changeable insertion state of the photosensitive material caused by manual insertion by the operator, the process area of the photosensitive material, required for calculating the amount of replenisher to be replenished, is accurately obtained. Therefore, the amount of the replenisher is appropriately determined and the process capacity of the developer or the fixing solution can constantly be maintained at the satisfactory level.

Abstract: At least two (groups of) sensors forming an insertion detection sensor are offset from each other in the conveyance direction of a photosensitive material. An insertion speed, which is different for each manual insertion event, is obtained based on the time difference when sensors that has been offset from each other detect the leading end of the photosensitive material. The length of the photosensitive material in the conveyance direction thereof is accurately computed based on the insertion speed and other information. According to the present invention, by correcting the errors due to the changeable insertion state of the photosensitive material caused by manual insertion by the operator, the process area of the photosensitive material, required for calculating the amount of replenisher to be replenished, can be accurately obtained.