摘要:
Succinic acid is produced by bringing a succinic acid-containing liquid containing succinic acid and cation which is obtained by fermentation or an enzymatic method into contact with an H-type strongly acidic cation-exchange resin in an amount equivalent to or more than the amount of cation other than hydrogen ion contained in the succinic acid-containing liquid, and precipitating a crystal of succinic acid from the obtained ion-exchange-treated liquid to obtain purified succinic acid.
摘要:
Disclosed is a compact self-ballasted fluorescent lamp that includes a phosphor coating provided inside a glass tube bent to have a double-spiral configuration. The arc tube has two spiral parts that are wound around an axis “A”, and a turning part joining the two spiral parts. At any cross section of the glass tube, the applied phosphor coating is thicker in the inner surface of the glass tube near the ends of the glass tube in the axis “A” direction, than in the inner surface near the turning part.
摘要:
Both ends of a bulb of a waste fluorescent lamp are cut off, a phosphor layer formed on an interior surface of the bulb is detached, so that mercury-containing phosphor powder can be obtained. The mercury-containing phosphor powder is subjected to a heating and reducing process with the dry-method, by mixing an organic reducing agent with the phosphor powder and heating the mixture, to vaporize and separate mercury from the phosphor powder. The vaporized mercury is then cooled and condensed, to collect mercury.
摘要:
An apparatus for estimating an air pressure of a tire of a tired wheel of a motor vehicle, on the basis of a temperature of the tire as well as a motion of the tired wheel, preferably including a temperature-related variable sensor for detecting a temperature-related variable related to the temperature of the tire, and an estimating device for estimating the air pressure of the tire on the basis of the temperature-related variable as well as the motion of the tired wheel.
摘要:
Peptide derivatives are obtained by eliminating the masking groups from masked peptide derivatives in which the guanidino group of an arginine residue and the carboxyl group of the arginine residue are masked. The guanidino group can be masked, for example, with a tosyl, nitro or benzyloxycarbonyl group, and the carboxyl group can be masked by converting it to an ester group, for example, a benzyl or t-butyl ester group. The masking groups can be eliminated using hydrogen fluoride, for example.
摘要:
An ultrasonic testing apparatus includes an ultrasonic probe disposed under an end portion of a pipe laid in the horizontal direction to face the pipe end portion. The probe transmits ultrasonic waves to the end portion of the pipe and receives the ultrasonic waves therefrom. A probe holder housing the probe includes a coupling medium reserver part which surrounds a space between the probe and the end portion of the pipe to contain a coupling medium W. The coupling medium reserver part includes a part body 21 into which the coupling medium is supplied; an annular bellows part, which is attached to the upper side of the part body to internally communicate with the part body, and an annular spacer 23 attached to the upper side of the bellows part, the upper surface of the annular spacer being a flat horizontal surface.
摘要:
The method of steel grade determination for a steel material having a substantially circular cross-section comprise: a detection step in which while a measurement section 2 including an irradiation section 21 for performing X-ray irradiation and a detection section 22 for detecting fluorescent X-rays is relatively moved along an outer peripheral surface of the steel material 4 with respect to the steel material for a predetermined time period necessary for analysis, the steel material is irradiated with X-rays from the irradiation section, and fluorescent X-rays radiated from the steel material are detected by the detection section; a calculation step of calculating a composition of the steel material based on fluorescent X-rays detected in the detection step; and a determination step of determining a steel grade of the steel material according to the composition calculated in the calculation step.
摘要:
An electric motor system including: a rotor (9); a stator (8); the rotor and the stator being mounted for movement relative to one another; the rotor having multiple magnetic poles (11); the stator having multiple salient poles (12) facing the magnetic poles; a first coil set (1A) and a second coil set (1B); the first coil set having three phases, each of the phases comprising a first coil (u1, v1, w1) and a second coil (u1 v1′, w1′) connected in series and wrapped around different of the salient poles in different directions relative to the rotor; the second coil set having three phases, each of the phases comprising a first coil (u2, v2, w2) and a second coil (u2′, v2′, w2′) connected in series and wrapped around different of the salient poles in different directions relative to the rotor; a driver (2) configured to drive the first coil set with a first three-phase voltage (U1, V1, W1) and to drive the second coil set with a second three-phase voltage (U2, V2, W2); the driver configured to drive the first phase of the first three-phase voltage and the first phase of the second three-phase voltage with a relative phase shift.
摘要:
A power conversion apparatus including: a three-level inverter including bridge circuits each including a first semiconductor switching device and a second semiconductor switching device connected in series, the bridge circuits being connected to a positive terminal and a negative terminal of a DC power supply, and switch circuits having bidirectional characteristics and connected to respective AC output terminals of the bridge circuits which are the connection points between the first semiconductor switching devices and the second semiconductor switching devices, and to an intermediate potential point of the DC power supply; and single-phase inverters each including a plurality of semiconductor switching devices and respectively connected in series to the AC output terminals of the bridge circuits. The sum of an output voltage of the three-level inverter and output voltages of the single-phase inverters is supplied to a load.
摘要:
According to a process of the invention, a ketone, an aromatic compound and hydrogen as starting materials are reacted together in a single reaction step to produce an alkylaromatic compound in high yield. A process for producing phenols in the invention includes a step of performing the above alkylation process and does not increase the number of steps compared to the conventional cumene process. The process for producing alkylated aromatic compounds includes reacting an aromatic compound such as benzene, a ketone such as acetone and hydrogen in the presence of a solid acid substance, preferably a zeolite, and a silver-containing catalyst.