Abstract: An outer ring, an inner ring and a ball serving as mechanical components configuring a deep groove ball bearing are formed of steel containing at least 0.77 mass % and not more than 0.85 mass % of carbon, at least 0.01 mass % and not more than 0.25 mass % of silicon, at least 0.01 mass % and not more than 0.35 mass % of manganese, at least 0.01 mass % and not more than 0.15 mass % of nickel, at least 3.75 mass % and not more than 4.25 mass % of chromium, at least 4 mass % and not more than 4.5 mass % of molybdenum and at least 0.9 mass % and not more than 1.1 mass % of vanadium with a remainder consisting of iron and impurity, and have raceway/rolling contact surfaces, the surface being included in a region having a nitrogen enriched layer having a nitrogen concentration of at least 0.05 mass %, the nitrogen enriched layer having a carbon concentration and the nitrogen concentration, in total, of at least 0.82 mass % and not more than 1.9 mass %.

Abstract: A mirror surface angle adjusting device includes: a pivot plate (10) which supports a mirror (6) and is attached to a holder (9) pivotably three-dimensionally on a pivot shaft (76); a bracket (8) disposed on a vehicle body; a mirror tilting drive section (11) contained between the bracket (8) and the holder (9) attached to the bracket (8); an operation shaft (44A, 44B) of the mirror tilting drive section (11), the operation shaft penetrating through the holder (9) and being connected to the pivot plate (10); a detection rod (101A, 101B) which moves following the pivot plate (10); an angle detection section (100) which detects a tilt angle of the pivot plate (10); a pivot depressed portion (80) into which the pivot shaft can be press-fitted; and a gear positioning rib (69) provided on an inner wall of the holder (9) to position the mirror tilting drive section (42).

Abstract: A support shaft connects between a flange and a pump unit. An intermediate member, which connects between the support shaft and pump unit, enables a relative positional change between the support shaft and the pump unit in an axial direction of the support shaft. The intermediate member limits a relative positional change between the support shaft and the pump unit in a circumferential direction of the support shaft. A resilient member is received in the support shaft and exerts a restoring force in an axial direction of the support shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion of the fuel tank.

Abstract: An outer ring, an inner ring and a ball serving as mechanical components configuring a deep groove ball bearing are formed of steel containing at least 0.77 mass % and not more than 0.85 mass % of carbon, at least 0.01 mass % and not more than 0.25 mass % of silicon, at least 0.01 mass % and not more than 0.35 mass % of manganese, at least 0.01 mass % and not more than 0.15 mass % of nickel, at least 3.75 mass % and not more than 4.25 mass % of chromium, at least 4 mass % and not more than 4.5 mass % of molybdenum and at least 0.9 mass % and not more than 1.1 mass % of vanadium with a remainder consisting of iron and impurity, and have raceway/rolling contact surfaces, the surface being included in a region having a nitrogen enriched layer having a nitrogen concentration of at least 0.05 mass %, the nitrogen enriched layer having a carbon concentration and the nitrogen concentration, in total, of at least 0.82 mass % and not more than 1.9 mass %.

Abstract: A pyridazine compound represented by formula (1): has an excellent plant disease controlling effect.

Abstract: An outer ring, an inner ring and a ball serving as mechanical components configuring a deep groove ball bearing are formed of steel containing at least 0.77 mass % and not more than 0.85 mass % of carbon, at least 0.01 mass % and not more than 0.25 mass % of silicon, at least 0.01 mass % and not more than 0.35 mass % of manganese, at least 0.01 mass % and not more than 0.15 mass % of nickel, at least 3.75 mass % and not more than 4.25 mass % of chromium, at least 4 mass % and not more than 4.5 mass % of molybdenum and at least 0.9 mass % and not more than 1.1 mass % of vanadium with a remainder consisting of iron and impurity, and have raceway/rolling contact surfaces, the surface being included in a region having a nitrogen enriched layer having a nitrogen concentration of at least 0.05 mass %, the nitrogen enriched layer having a carbon concentration and the nitrogen concentration, in total, of at least 0.82 mass % and not more than 1.9 mass %.

Abstract: A pyridazine compound represented by formula (1): wherein R1 and R2 are same or different and represent a C1-C4 alkyl group; R3 represents a halogen atom, a nitro group, a cyano group, a C1-C4 alkyl group optionally substituted by at least one halogen atom, a C1-C4 alkoxy group optionally substituted by at least one halogen atom or a C1-C4 alkylthio group optionally substituted by at least one halogen atom; R4 and R5 each represents a halogen atom, a nitro group, a cyano group, a C1-C4 alkyl group optionally substituted by at least one halogen atom or a C1-C4 alkoxy group optionally substituted by at least one halogen atom; and m and n each represents an integer.

Abstract: A pyridazine compound represented by formula (1): has an excellent plant disease controlling effect.

Abstract: An outer ring and an inner ring of a rolling bearing are constituted of steel containing 0.77 to 0.85% of carbon, 0.01 to 0.25% of silicon, 0.01 to 0.35% of manganese, 0.01 to 0.15% of nickel, 3.75 to 4.25% of chromium, 4 to 4.5% of molybdenum and 0.9 to 1.1% of vanadium with the rest consisting of iron and impurities, a nitrogen-enriched layer having a nitrogen concentration of at least 0.05 mass % is formed on a region including a rolling surface, and the total of a carbon concentration and the nitrogen concentration in the nitrogen-enriched layer is at least 0.82 mass % and not more than 1.9 mass %. A DLC coating layer is arranged on a region including an outer ring contact surface.

Abstract: A pyridazine compound represented by formula (1): has an excellent plant disease controlling effect.

Abstract: A pyridazine compound represented by the formula (1): has an excellent plant disease controlling activity.

Abstract: A pyridazine compound represented by formula (1): has an excellent plant disease controlling effect.

Abstract: A process for the production of a glass by the vacuum melting method using silica as a raw material is disclosed, comprising filing a silica fine powder in a suitable vessel, heating it in the presence of an accelerator for phase conversion to obtain a porous formed body consisting of a cristobalite phase, and then heating and melting the formed body in vacuo. According to the present invention, a transparent and active glass having a high quality can be produced at an inexpensive cost.

Abstract: The present invention relates to a process for production of a glass by the vacuum melting method using silica as raw material and comprises uniformly preheating a silica powder containing an accelerator for phase conversion to about 800.degree. C.; filling the preheated silica powder in a container while substantially maintaining the temperature; further heating the silica powder to convert it into a sintered body having a cristobalite phase; and then heating and melting the sintered body in vacuum for glass formation, whereby not only are improvments in raw material efficiency and productivity by shortening of the heating time achieved, but also the formation of cracks on the surface of the resulted sintered body which has been one of the important reasons for resulting in products of sub-standard can be substantially completely avoided.

Abstract: The present invention relates to a process for the production of a glass from silica as a raw material by a vacuum melting method, in which a high quality glass is produced efficiently by compounding a silica powder containing an excess amount of the accelerator for phase conversion and silica powders containing substantially no such accelerator or by introducing silica powders in a solution containing an accelerator for phase conversion, adding an acid or basic component to the mixture to adjust the pH thereof, stirring the mixture for mixing, and subjecting the mixture to dehydration and drying to obtain silica powders containing the accelerator for phase conversion in proper quantities, filling the resultant silica powders in a vessel and heating the powder to form a sintered molded body having cristobalite phase having a self-supporting property and also having a proper matrix strength and a high porosity, and then heating the sintered body under vacuum.

Abstract: A process for production of a glass by a vacuum melting method using silica as raw materials comprising heating silica powders in the presence of an accelerator for phase conversion to convert them into a sintered body having cristobalite phase; molding or repowdering the sintered body; containing or filling the resulted sintered body in a container having a desired shape; and then heating and melting it in vacuo for glass formation, or accumulating a plurality of the sintered bodies into a desired shape; and then heating and melting it for glass formation, whereby a high-quality glass ingot having a desired shape or a larger glass ingot can be readily obtained without reduction in productivity.

Abstract: A liquid encapsulation Czockralski method for growing a single crystal of a semiconductor compound which comprises: melting a semiconductor compound in the presence of a B.sub.2 O.sub.3 liquid encapsulant to form a two phase liquid; dipping a semiconductor seed crystal into the compound melt covered with the B.sub.2 O.sub.3 encapsulant; growing the crystal from the compound melt by pulling up and rotating the seed crystal; and, cooling the crystal in a cooling zone above a crucible. The cooling zone is maintained at a substantially uniform temperature distribution with a small temperature gradient by using primarily an independently controlled crystal cooling zone heater H3. In addition, an independently controlled melt heater H1 and an independently controlled crystal growing heater H2 are employed. Also, a crystal cooling zone heat shield 11 can be provided to aid in slowly cooling the grown crystal in the substantially uniform temperature distribution.

Abstract: A means for detecting helium which has flowed into a system by substitution for air at a leaking location and mixed with the remaining gases, and after the helium gas permeates a helium permeable membrane as a sample gas so that the air component unnecessary for detection is suppressed, the helium gas enters the space of a mass spectrometer tube. That is, the membrane suppresses the permeation of the air component and selectively allows the helium component to pass therethrough, so that the helium component ratio in the space of the spectrometer tube is made larger than that in the sample gas. The helium partial pressure in the gas with thus increased helium component is determined by the mass spectrometer.The change in the helium partial pressure in the spectrometer tube is produced depending on the substitution between the air component gases and the helium gas at the leak location.

Abstract: A heat insulated tank is disclosed having inner and outer walls between which a supporting material is interposed. The material comprises a molding of alkaline earth metal silicates or a molding of composite material based thereon having a continuous open cell structure and subjected to heat treatment under vacuum. Inside and outside faces of said supporting material are provided with a suitable number of grooves. The entire surface of said supporting material is impregnated with a solution of sodium silicate, potassium silicate or ethyl silicate and subjected to baking.The supporting material has a high insulating capability and a high resistance to compression, thus it is applicable to square shaped tanks in addition to conventional spherical or cylindrical ones. The tank is easy to manufacture with increased storage capacity.

Abstract: A top rail for use in connection with a railing construction or the like is constituted by a main top rail member, a resilient cushion layer fitted on the main top rail member, and a surface portion layer integrally formed with the outer surface of the resilient cushion layer. the main top rail member has a support post receiving slot extending in the longitudinal direction of the top rail and opening downwardly.