Abstract: A holographic recording material consisting of diethylene glycol-bis(allyl carbonate), 2,2-bis[3,5-dibromo-4-(2-methacryloyloxyethoxy)phenyl]propane, and a photopolymerization initiator. A method for holographic recording, which comprises interposing the holographic recording material between two opposed surface materials, heating the interposed holographic recording material thereby solidifying the recording material and giving rise to a dry plate, and then exposing the dry plate to a coherent light.

Abstract: An active gravitation compensation device, in which the weight of a driven member is supported substantially in a gravitation-free state by the output of a servo-actuator, and a small-sized torque motor is directly coupled to the driven member to control the operation of the driven member with the output of the torque motor.

Abstract: A metal is dissolved by a method which comprises establishing contact of the metal with a quaternary ammonium compound and a halogenated hydrocarbon or with a quaternary ammonium compound, a halogenated hydrocarbon, and a polar solvent.

Abstract: A diffraction grating comprises the plurality of grating rings provided at positions such that their radii r are selected so that a function .phi.(r) of r satisfies the following differential equation and initial conditions, ##EQU1## where .lambda. is the wavelength of a scanning light beam, f is the focal length of the diffraction grating, r is the radius from the center of diffraction grating, M is the distance from the diffraction grating to a scanning surface expressed as a multiple of the focal length f, and moreover the relation.phi.(r)=n+.phi.(0)n=0, 1, 2, . . .(n is a non-negative integer)is satisfied.

Abstract: Torque generating device using shape memory alloy consisting of multiple casings arranged at equal distances around the periphery of a rotatable wheel, each casing housing a coil of shape memory alloy. Part of the wheel is in a high temperature region where the temperature is higher than the transformation temperature of the shape memory alloy and part of the wheel is in a low temperature region where the temperature is lower than the transformation temperature of the shape memory alloy. When in the high temperature region the reversion force of the alloy rotates the rotatable wheel and in the low temperature region the alloy is forcibly deformed.

Abstract: Charged particles are generated and are subjected to a spatial distribution. Images of the distributed charged particles are formed on a screen and are processed to count the number of the charged particles.

Abstract: A surge absorption device includes fundamentally a first semiconductor region, a second semiconductor region forming a pn junction between itself and the first region, a third region determining the effective thickness of the second region, and a fourth region provided in contact with the first region and forming an injection junction for causing first minority carriers of a kind the same as that of minority carriers in the first region to be injected into the first region. When a depletion layer formed by application of reverse bias across the pn junction reaches the third region, a punch-through region is formed in the second region. In this state, when minority carriers are injected from the fourth region into the first region, the minority carriers are absorbed by the second region to constitute the device current.

Abstract: A joint sintered high-temperature superconductive ceramic article is obtained by joining two sintered high-temperature superconductive ceramic masses formed of oriented crystal grains in such a manner that the directions of grain-orientation are different across the interface of union and pressing the joined ceramic masses against each other perpendicularly to the interface of union and, at the same time, heating them.

Abstract: A method of die forming using an elastically deformable die is characterized by using a die provided in advance with a prescribed pattern of thickness variation, allowing the die to be elastically deformed by the pressure it receives from the material being formed during the forming operation, and forming the material to the configuration resulting from the deformation.

Abstract: Electrodes are provided separated by spaces through which a liquid comes in and out, the electrodes being located 0.5 mm to 6.0 mm from the heat transfer surface in a liquid which has an electrical conductivity of 10.sup.-10 (1/(.OMEGA..multidot.m)) or more, the velocity of the flow being within the range of a Reynolds number for a laminar flow range, and a high-voltage direct current is applied to the electrodes to thereby produce turbulent components in the flow of the liquid to augment heat transfer between the liquid and the heat transfer surface.

Abstract: Enzyme-occluding polymer particles are produced by a method including the steps of dissolving an enzyme in an aqueous solution of poly(vinyl alcohol) possessing a styrylpyridinium group or a styrylquinolinium group, spray drying the aqueous solution, and exposing the resultant dry particles to an actinic ray, thereby photo-crosslinking the particles.

Abstract: A conveyance device has a high-temperature pulley and a low-temperature pulley rotatably mounted on a chassis at a prescribed distance from each other and an endless belt constituted of a shape memory alloy is wound around the two pulleys. The high-temperature pulley is maintained at a temperature higher, and the low-temperature pulley at a temperature lower, than the transformation temperature of the shape memory alloy. The pulleys are rotated and the chassis powered to move by the force produced by the shape memory alloy when it restores to its memorized shape.

Abstract: A nozzle for water jet cutting has a piezoelectric element provided at a position for acting on a fluid in its pressure chamber. A voltage varying with time is applied to the piezoelectric element to provide flow rate oscillation or pressure pulsation to the fluid which is jetted from the nozzle.

Abstract: A composition produced as a result of mixing alumina, silica, and a calcium phosphate compound in a specific ratio exhibits high affinity for bioceramics. When a bioceramic is coated with this composition and the coated bioceramic is heated, the composite is fused fast with the bioceramic to produce a composition bioceramic which is active to vital tissues.

Abstract: A ceramic isothermal forging die comprises a pair of disk-shaped die halves that are formed of ceramic and have die cavities cut in their mating surfaces and a pair of die half holders each having a recess for accommodating one of the die halves. Each die half is divided into a plurality of radial segments whose bottom surfaces are tapered away from their mating surface with increasing proximity to the center of the die. The floor of each die half holder is tapered to become deeper toward the center of the die and to be complementary to the tapered bottom surfaces of the die segments. The ceramic material of the die makes it usable in the atmosphere. Because of the segmentation of the die halves and the tapering of the segment bottoms and the floor of the die holder recesses, a large force which would otherwise be produced in the circumferential direction of the die by thermal stress during heating and cooling is suppressed.

Abstract: Disclosed is a vasoconstrictor peptide called Endothelin having a molecular weight of 2,500.+-.300. Endothelin contains 21 amino acid residues, wherein four cysteines form two sets of S--S bond.In order to obtain the vasoconstrictor factors of the present invention, it is preferable to culture the endothelial cells collected from the vascular inner walls in a serum-free medium.The vasoconstrictor peptides of the present invention can be utilized as hypotension therapeutic agents or local vasoconstrictors to animals including humans.

Abstract: A superplastic composite material is produced by thoroughly and homogeneously mixing particles or whiskers of silicon nitride and aluminum metal powder in a solvent, then removing the solvent from the resultant mixture, sintering the residual mixture at an elevated temperature, further compressing it at an elevated temperature, then hot extrusion-molding the compressed mixture thereby forming a shaped article, and heat-treating this shaped article.

Abstract: An apparatus for removing particles from exhaust gas includes an electrode support block formed of a support constituted of electrical insulation material and having a recessed portion that opens to the downstream side of the exhaust gas flow, the electrode support block being arranged in an intake tube through which the flow of exhaust gas that contains the particles is introduced with an intervening space for the flow of exhaust gas between the peripheral surface of the support block and the intake tube. A hollow needle electrode with a spray nozzle at its tip is provided in the base of the recessed portion and a cylindrical electrode is provided in opposition to the hollow electrode around the inner edge of the recessed portion. Provided downstream of the cylindrical electrode is an atomization chamber into which flow the exhaust gas and charged droplets emitted from the spray nozzle. A cylindrical collector electrode is provided around the inside of the atomization chamber.

Abstract: A semiconductor device having a sandwich construction formed by causing a semiconductor region and an opposed region to face each other across a thin film which is made of a substance having a wider forbidden band gap than that of the semiconductor region and having a barrier relative to the semiconductor region. The so-formed device exhibits various effects such as amplification, negative resistance, switching, voltage or current generation, photo-electric conversion, and light-emission either upon irradiation with light or upon application of a power source thereon.

Abstract: Burner operating air equivalence ratio is monitored and controlled by a method comprising measuring OH radical spectral emission intensity at a base of a flame while combustion is in progress at a burner, employing a linear relationship between the intensity and an actual burner operating air equivalence ratio to determine the ratio while combustion is in progress, comparing the determined ratio with a desired burner operating air equivalence ratio to determine the difference therebetween, and controlling the amount of air supplied to the burner on the basis of the difference.