摘要:
A method for producing an α-L-aspartyl-L-phenylalanine-β-ester (also named α-L-(β-o-substituted aspartyl)-L-phenylalanine), which is an intermediate of an α-L-aspartyl-L-phenylalanine-α-methyl ester (also named α-L-aspartyl-L-phenylalanine methyl ester; product name: aspartame), easily, at high yield and inexpensively without going through a complex synthesis method is provided. Further, an easy, inexpensive and high-yield production method for an α-L-aspartyl-L-phenylalanine-α-methyl ester is provided. α-L-aspartyl-L-phenylalanine-α-methyl ester is produced from a L-aspartic acid-α,β-diester and L-phenylalanine using an enzyme or enzyme-containing substance that has an ability to catalyze a reaction in which L-phenylalanine performs no nucleophilic attack on a β-ester site of L-aspartic acid-α,β-diester but performs a nucleophilic attack on an α-ester site thereof.
摘要:
An image capture apparatus includes: a communication unit and a control unit. The communication unit communicates with an external apparatus via a first transmission line and a second transmission line. The control unit determines whether or not the communication unit is in a predetermined state, in a case where the operation mode of the image capture apparatus changed to either a playback mode or an image capture mode. The control unit does not execute a connecting process in a case where the communication unit is in the predetermined state.
摘要:
An alkaline dry battery including nickel oxyhydroxide and manganese dioxide as positive electrode active materials. The nickel oxyhydroxide is a solid solution including at least manganese and cobalt. The content of the manganese is 5.2×10−2 to 7.5×10−2 moles per mole of the nickel oxyhydroxide, and the content of the cobalt is 0.5×10−2 to 2.0×10−2 moles. The alkaline dry battery maintains excellent heavy-load discharge characteristics, exhibits suppressed polarization during heavy-load pulse discharge to improve the operational stability of digital devices, and has high reliability with respect to leakage resistance and safety under short-circuit conditions.
摘要:
DNA and recombinant DNA that encode a peptide-forming enzyme, a method for producing a peptide-forming enzyme, and a method for producing a dipeptide are disclosed. A method for producing a dipeptide includes producing a dipeptide from a carboxy component and an amine component by using a culture of a microbe belonging to the genus Sphingobacterium and having the ability to form the dipeptide from the carboxy component and the amine component, a microbial cell separated from the culture, treated microbial cell product of the microbe or a peptide-forming enzyme derived from the microbe.
摘要:
A level shifting circuit has a high-level shifter connected to a first high voltage and to a first low voltage, for amplifying the peak voltage of an input signal; a low-level shifter connected to a second high voltage lower than the first high voltage and to a second low voltage lower than the first low voltage, for amplifying the trough voltage of the input signal; a high-voltage controlling transistor connected to the first high voltage and to an output node and turned on and off according to the output of the high-level shifter; and a low-voltage controlling transistor connected to the output node and to the second low voltage and turned on and off according to the output of the low-level shifter complementarily to the high-voltage controlling transistor. The level shifting circuit is capable of amplifying both the peak and trough voltages of an input signal.
摘要:
A multiplexer circuit comprises a plurality of circuits for decoding digital timing signals, and a plurality of circuits for passing an one of the analogue voltage potentials to an output terminal corresponding to the decoded result of the decoding circuits, and preventing the passing circuits from passing more than one signal simultaneously.
摘要:
A seal member is attached to a cover which occludes a gear case as a housing unit. The seal member is formed of elastomer and integrally formed with: a plate-shaped portion formed into a disc shape which covers the inner surface of the cover; an inner seal portion which is positioned on the inner peripheral edge of a through-hole, and comes into sliding contact with the outer peripheral surface of an output member; an outer seal portion which is positioned on the periphery of the cover, and comes into contact with the opening end of the housing unit; and anchor portions which latch onto the front surface of the cover via mounting holes provided to the cover. The boundary between the seal member and the cover extends only to the outside of the gear case, and does not extend to the inside of the gear case.
摘要:
A bandpass filter module includes a mounting board and a BPF chip mounted on a surface thereof. The BPF chip includes three or more resonators; a first-stage resonator located closest to an input terminal, a final-stage resonator located closest to an output terminal, and a middle-stage resonator connected between the first-stage and the final-stage resonators and located in a chip middle zone. The mounting board includes an area overlapping with the chip middle zone, viewed in plan, defining a ground-free space in which no ground electrode is disposed. The ground-free space is formed at least from the surface of the mounting board to a depth position at which a topmost internal wiring layer is located. The middle-stage resonator is prevented from being coupled to ground electrodes on the mounting board and from a lower Q-value and increased insertion loss.
摘要:
A bandpass filter includes a layered structure including a plurality of stacked dielectric layers, and first to third resonators provided within the layered structure. In terms of circuit configuration, the second resonator is located between the first and third resonators. The first resonator includes a first inductor and a first capacitor. The second resonator includes a second inductor and a second capacitor. The third resonator includes a third inductor and a third capacitor. The second inductor is disposed at a position different from that of each of the first and third inductors in the stacking direction of the dielectric layers. The second inductor is lower in inductance than the first and third inductors. The second capacitor is higher in capacitance than the first and third capacitors.
摘要:
A laminated electronic device comprises two or more wiring layers including a first wiring layer and a second wiring layer, an insulating layer interposed between the first wiring layer and second wiring layer, and a through conductor extending through the insulating layer for electrically connecting a first conductor disposed on the first wiring layer to a second conductor disposed on the second wiring layer. The through conductor includes divergent sections at both ends, which have a diameter gradually increased toward the first conductor or second conductor.