摘要:
A process for preparing optically active (R)-3-chloro-1,2-propanediol, which comprises subjecting (R,S)-3-chloro-1,2-propanediol to the reaction of a microorganism belonging to genus Serratia in a reaction mixture, and then collecting the residual (R)-3-chloro-1,2-propanediol. According to the process of the present invention, (R)-3-chloro-1,2-propanediol can be efficiently prepared starting from low cost (R,S)-3-chloro-1,2-propanediol.
摘要:
A process for preparing an optically active 3-chloro-1, 2-propanediol by employing microorganism which can selectively metabolize (R)- or (S)-3-chloro-1,2-propanediol. The decomposition rate of the substrate can be accelerated and the substrate concentration can be increased by adding a compound having SH group to the reaction solution.According to the process of the present invention, the optically active 3-chloro-1,2-propanediol can be easily prepared starting from low-cost (R,S)-3-chloro-1, 2-propanediol.
摘要:
A process for preparing optically active indoline-2-carboxylic acid by an optical resolution, which comprises subjecting a racemic ester of (R,S)-indoline-2-carboxylic acid having the general formula [(R,S)-I] to the action of an enzyme or a microorganism having a stereo-selective esterase activity, which is capable of asymmetrically hydrolyzing the racemic ester [(R,S)-I] to give optically active indoline-2-carboxylic acid having the formula [II*] so as to produce the hydrolysis product, i.e. optically active indoline-2-carboxylic acid [II*] and an unreacted optically active ester of indoline-2-carboxylic acid having the general formula [I*], isolating each optically active form, and further, if necessary, hydrolyzing the obtained optically active ester [I*] to give an optical antipode of the acid [II*].According to the process of the present invention, optically active indoline-2-carboxylic acid with a high optical purity can be prepared in a simple process with a good yield.
摘要:
A process of manufacturing optically active (S)-1,2-diols, wherein (R)-1,2-diols represented by the general formula [I] ##STR1## (where: R represents a substituted or unsubstituted alkyl group, alkenyl group, aryl group or aralkyl group) or a mixture of diols of the general formula [I] and (S)-1,2-diols represented by the general formula [II] ##STR2## (Where: R represents the same as above) having an opposite configuration to the general formula [I] is subjected to the action of a microorganism capable of selectively metabolizing the diols of the general formula [I], or capable of converting the diols of the general formula [I] into the diols of the general formula [II], or having the both capabilities, and the formed and accumulated (S)-1,2-diols of the general formula [II] is collected. According to the present invention, optically active (S)-1,2-diols can be produced commercially and advantageously.
摘要:
Liquid to be injected from an injection nozzle is supplied through a liquid supply channel toward the injection nozzle. Negative pressure for sucking the liquid injected from the injection nozzle through a suction port is produced by a suction unit and guided through a suction channel toward the suction port. A bypass channel which bypasses the liquid supply channel on the upstream side with respect to the injection nozzle and connects with the suction channel is provided. The bypass channel is opened and closed by an opening and closing unit. According to this structure, flow of unnecessary liquid from the injection nozzle can be reduced by opening the opening and closing unit while injection of liquid is stopping.
摘要:
According to an embodiment, a transmission apparatus is installed in a locomotive having ID information. A first connecting direction and a second connecting direction opposite the first connecting direction are defined for the locomotive. The transmission apparatus includes a transmission unit and a connection state determination unit. The transmission unit transmits the ID information received from other locomotive from one of the first connecting direction and the second connecting direction to other one of the first connecting direction and the second connecting direction. The connection state determination unit determines a connection state between the other locomotive and the locomotive in which the transmission apparatus is installed, based on the received ID information.
摘要:
Provided is an Sb—Te base alloy sinter sputtering target having Sb and Te as its primary component and comprising a structure in which Sb—Te base alloy particles are surrounded by fine carbon or boron particles; wherein, if the mean diameter of the Sb—Te base alloy particles is X and the particle size of carbon or boron is Y, Y/X is within the range of 1/10 to 1/10000. The present invention seeks to improve the Sb—Te base alloy sputtering target structure, inhibit the generation of cracks in the sintered target, and prevent the generation of arcing during the sputtering process.
摘要:
A power supply control method of performing a feedback control of an output voltage based on a deviation signal for a standard voltage value serving as a target value for the output voltage and a digital signal generated by analog/digital (A/D) conversion of the output voltage, the method includes selecting a range of the reference voltage for the A/D conversion based on the digital signal in a power supply startup period, and selecting a range of the reference voltage for the A/D conversion based on the deviation signal or a signal corresponding to the deviation signal in a steady state period.
摘要:
A control device includes a first terminal receiving a monitored output voltage and a second terminal transmitting a pulse width modulation (PWM) signal. A converting unit generates an A/D conversion synchronous signal, and an A/D converter samples the monitored output voltage in accordance with the A/D conversion synchronous signal. A pulse oscillator controls a position of a first edge on the PWM signal in accordance with the A/D conversion synchronous signal, and controls a position of a second edge based on the monitored voltage.
摘要:
A power supply controller includes an analog to digital (A/D) converter that performs analog-digital conversion of an output voltage and outputs a digital signal, a deviation signal generator unit that generates a deviation signal from the digital signal and a standard voltage value serving as an output voltage target value, and a power controller unit that controls the output voltage based on the deviation signal. The power supply controller includes a conversion range setting unit that sets a range of the reference voltage into the A/D converter based on a first signal as the digital signal in a power supply startup period, and sets the reference voltage range into the A/D converter based on a second signal as the deviation signal or as a signal corresponding to the deviation signal in a steady state period.