摘要:
A process for producing a compound represented by the following formula (II) which comprises treating a compound represented by the following formula (I) (wherein R1, R2 and R3 represent each a specific substituent) with an enzyme capable of asymmetrically hydrolyzing an ester and the novel compound (II). The process of the present invention makes it possible to easily obtain an optically active 2-azetidinone derivative in a large amount at a low cost
摘要:
A processes which is industrially advantageous in producing antibacterial agents. An industrially advantageous process for producing an intermediate useful in producing antibactrial agents is provided by producing compound (VI-a) in accordance with the following reaction schema. A process for producing the compound represented by the above formulae and production intermediates thereof.
摘要:
A semiconductor device comprises a substrate, pluralities of first and second external electrodes formed in two end portions of one surface of the substrate, a first semiconductor chip mounted on the other surface of the substrate, the first semiconductor chip having an electrode pad row formed in one end portion of one surface of the first semiconductor chip and electrically connected to the first external electrodes, the first semiconductor chip being disposed so that the one end portion of the first semiconductor chip is positioned on an end portion on which the first external electrodes of the substrate are formed, and a second semiconductor chip mounted on the first semiconductor chip, the second semiconductor chip having an electrode pad row formed in one end portion of one surface of the second semiconductor chip and electrically connected to the second external electrode, the second semiconductor chip being disposed so that the one end portion of the second semiconductor chip is positioned on an end portion on which the second external electrodes of the substrate are formed.
摘要:
Processes for producing antibacterial agents and intermediates useful in producing antibacterial agents are provided and include producing compound (VI-a) in accordance with the following reaction schema, as well as production intermediates thereof.
摘要:
There is provided a method capable of decreasing a friction force in friction stir welding, in which a welding tool is used. In a method of friction stir welding workpieces together by rotating and pressingly plugging a welding tool, formed from a harder material than the workpieces, into a weld zone of the workpieces and moving the welding tool relatively in a welding direction, a power supply device allows a current to flow between the welding tool 1 and the workpieces to cause resistance heating of the welding tool. Combined use of resistance heating makes it possible to decrease a friction force. Preferably, a conductive ceramic is coated on surfaces of the welding tool to cause resistance heating.
摘要:
A compact vehicle production line is disclosed. The production line comprises a floor process of assembling floor constituent parts. Each is an aluminum alloy extrusion die cast product, which has been made, in an extrusion die casting process, by forcing molten aluminum alloy through a mold cavity in a predetermined direction. The assembled floor constituent parts are welded to make a floor structure. In an interior parts mount process, interior parts are to the floor structure to make a floor unit. In a body main process, each of two body side structures are trimmed to make a body side unit. A roof structure is trimmed to make a roof unit. The floor unit, the body side units, and the roof unit are assembled. The assembly is welded to make a body unit. In a running parts mount process, an under running unit is mounted to the body unit. In an exterior parts attachment process, color body panels are attached to the body unit.
摘要:
A polyolefin resin composition including(1) 67 to 96 wt.%, based on the total quantity of (1), (2) and (3), of polyolefin,(2) 3 to 25 wt.%, based on the total quantity of (1), (2) and (3), of titanium oxide,(3) 3 to 30 wt.%, based on the total quantity of (1), (2) and (3), of a plate-shaped inorganic filler, and(4) 5 to 150 ppm, based on the total quantity of (1), (2) and (3), of carbon black. The polyolefin resin composition of the present invention is superior in brightness and light intercepting properties and may be advantageously employed in e.g. a material of a meter casing for an automobile.
摘要:
An elastic surface wave device comprises an input transducer and an output transducer, these transducers being provided on one surface of a piezoelectric substrate and spaced apart a predetermined distance from each other. The input transducer is provided on its side facing the output transducer with at least one separate comb electrode which is electrically insulated from the rest of the input transducer.
摘要:
This disclosure concerns surface acoustic wave resonator devices having grating reflectors. The resonator comprises a substrate of piezoelectric material, an input interdigital transducer which converts electrical energy to surface acoustic wave energy, an output interdigital transducer which converts surface acoustic wave energy to electrical energy, first and second grating reflectors arranged in spaced aligned relationship on opposite ends of the substrate with the input transducer and the output transducer interposed therebetween the input transducer and the output transducer.The first grating reflector, whose aperture length is the same effective length as the input and output transducers, comprises a first group of interconnected parallel spaced conductors, a second group of interconnected parallel spaced conductors and at least one of isolated parallel conductors positioned between the first and second group of conductors. Each conductor of the one group is aligned with a corresponding conductor of the first group and a corresponding conductor of the second group. Each conductor of the first and second group is parallel and electrically interconnected. The second grating reflector is identical with the first grating reflector.
摘要:
A communication network includes a plurality of user networks that accommodates IP terminals and does not perform a call control function, a core network (a call control network) that is located among the user networks and performs a call control function and a call management function, and a gateway that connects the user networks to the core network. The gateway receives a communication request packet from the user network or a data packet that is initially transmitted, and analyzes the packet. Thus, the gateway establishes a necessary call in the core network to allow an IP packet to pass through the core network.