摘要:
The present invention relates to a process for producing (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans from crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans obtained by subjecting (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furan-2(1H)-ones which are produced by cyclizing a homofarnesylic acid amide or a monocyclohomofarnesylic acid amide in the presence of an acid agent and then hydrolyzing the cyclized product, to reduction reaction and then to cyclization reaction, said process including (i) an alkali treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans are heated in the presence of an alcohol and a metal hydroxide; and (ii) a washing treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans are washed with an aqueous acid solution. The thus obtained (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans have a less off-odor and hardly suffer from deterioration of their smell during storage.
摘要:
The present invention relates to a process for producing (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans from crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans obtained by subjecting (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furan-2(1H)-ones which are produced by cyclizing a homofarnesylic acid amide or a monocyclohomofarnesylic acid amide in the presence of an acid agent and then hydrolyzing the cyclized product, to reduction reaction and then to cyclization reaction, said process including (i) an alkali treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans are heated in the presence of an alcohol and a metal hydroxide; and (ii) a washing treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans are washed with an aqueous acid solution. The thus obtained (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,1-b]furans have a less off-odor and hardly suffer from deterioration of their smell during storage.
摘要:
A printing device has a liquid droplet ejection head that ejects liquid droplets; a conveyance unit that conveys recording paper; a platen that is disposed opposite the liquid droplet ejection head and has a plurality of suction holes arrayed in the conveyance direction in which the conveyance unit conveys the recording paper and a lateral direction perpendicular to the conveyance direction; a suction mechanism unit that suctions the recording paper through the suction holes in the platen; and an opening/closing mechanism that opens or closes at least part of the plural suction holes.
摘要:
A stereoscopic imaging apparatus which uses contrast AF to obviate disadvantages of phase-difference AF, shorten processing time of contrast AF, and improve focusing accuracy. A phase-difference CCD in which object images having passed through different regions in a predetermined direction of a single photographing optical system are pupil-split and imaged subjects the object images having passed through the respective regions to photoelectric conversion to obtain a main pixel image and a sub-pixel image which have a mutual phase difference. Contrast AF is performed using only one of the main pixel image and the sub-pixel image. Which one of the main pixel image and the sub-pixel image will be used for the contrast AF is determined depending on whether the position of an AF area in the angle of view belongs to a main pixel AF area or a sub-pixel AF area.
摘要:
A liquid discharge head includes a heat generating element which generates heat energy used to discharge a liquid; a temperature detecting element which changes in output voltage in response to a change in the temperature of the heat generating element; an electrical power source line and a grounding line electrically connected to each other through the heat generating element to apply a current to the heat generating element; and a pair of lines for temperature detection electrically connected to each other through the temperature detecting element to apply a current to the temperature detecting element. Here, each of the pair of lines for temperature detection is arranged adjacent to the other.
摘要:
A first inner electrode is integrally provided with a first terminal connection part connected to a first terminal electrode and a first linking connection part connected to a first linking electrode. A second inner electrode is integrally provided with a second terminal connection part connected to a second terminal electrode and a second linking connection part connected to a second linking electrode. A third inner electrode is integrally provided with a third linking connection part connected to the first linking electrode. A fourth inner electrode is integrally provided with a fourth linking connection part connected to the second linking electrode. The third inner electrode is adjacent to the first and fourth inner electrodes in a laminating direction of the plurality of dielectric layers. The first and fourth inner electrodes overlap the third inner electrode as seen in the laminating direction of the plurality of dielectric layers.
摘要:
A composition for use in an optical material is disclosed which is capable of providing an optical material satisfying a high refractive index (ne is 1.73 or more), a high strength (an elongation is 10% or more in a three-point bending test and drilling resistance is good), and a high thermostability (a softening point measured by TMA is 70° C. or higher). The optical material such as a lens for two-point frame spectacles is formed by polymerizing and curing a composition for use in an optical resin material containing (a) an inorganic compound having a sulfur atom and/or a selenium atom, (b) an episulfide compound, and (c) a xylylenedithiol compound.
摘要:
A remote operation apparatus in a vehicle has a display unit, an operation unit, a speed sensor, a brake sensor, a steer angle sensor, a side G sensor, and a control unit. The operation unit is capable of remotely controlling the display contents of the display unit. The operation of the operation unit is allowed when the vehicle is determined, by the control unit, to be stably traveling, and the operation of the operation unit is restricted when the vehicle is determined to be traveling un-stably, based on information on the travel condition of the vehicle from those sensors. The remote operation apparatus having the above-described operation scheme facilitates a stable travel of the vehicle.
摘要:
An air guide structure for guiding outside air in front of the vehicle to equipment to be cooled. Ai air guide duct structure (20) is provided with: left and right side-wall ducts (46, 68) provided to the left and right sides of equipment (16) to be cooled; and left and right seal sections (47, 69) protruding from the inner wall surfaces (46a, 68a) of the left and right side-wall ducts toward the equipment (16) to be cooled. The left and right seal sections (47, 69) are spaced by a predetermined distance (51) from the equipment (16) to be cooled toward the front of the vehicle body. Air pressure during the travel of the vehicle elastically deforms the right and left seal sections (47, 69) to cause the seal sections to make contact with the equipment (16) to be cooled.
摘要:
A prefetch processing apparatus includes a central-processing-unit monitor unit that monitors processing states of the central processing unit in association with time elapsed from start time of executing a program. A cache-miss-data address obtaining unit obtains cache-miss-data addresses in association with the time elapsed from the start time of executing the program, and a cycle determining unit determines a cycle of time required for executing the program. An identifying unit identifies a prefetch position in a cycle in which a prefetch-target address is to be prefetched by associating the cycle determined by the cycle determining unit with the cache-miss data addresses obtained by the cache-miss-data address obtaining unit. The prefetch-target address is an address of data on which prefetch processing is to be performed.