Abstract: A nondestructive reading method for an isotopic label, capable of easily and quickly reading information on an isotopic label imparted to an article in advance without destroying the label, and a nondestructive reading-use isotopic label suitably using this method. In addition, information obtained by this nondestructive reading method is used to easily and quickly judge the authenticity of an article.

Abstract: A diamond ultraviolet luminescent element (10) having a current-injection light-emitting diode structure includes a high-quality boron-doped p-type diamond crystal (semiconductor layer) (1) synthesized by the high pressure and high temperature method; a phosphorous-doped n-type diamond crystal (n-type semiconductor layer) (3) formed on the first diamond surface by the chemical vapor deposition; an electrode (5) formed on the surface of the n-type semiconductor layer (3); and an electrode (7) formed on the surface of the p-type semiconductor layer (1). The luminescence (235 nm) attributed to the recombination of free excitons resulting from current injection dominates in ultraviolet wavelength region (10).

Abstract: A diamond high brightness ultraviolet ray emitting element employs the carrier high-density phase of a diamond as a light-emitting mechanism. It includes a diamond substrate, a first diamond layer formed on the diamond substrate, a second diamond layer formed on the first diamond layer and functioning as an emission layer, a third diamond layer formed on the second diamond layer, a first electrode formed on the first diamond layer, and a second electrode formed on the third diamond layer. The second diamond layer constitutes the carrier high-density phase formed by high-density excitation. The combination of the high-density excitation with the high-quality diamond can implement the device that has stable carrier high-density phase, and emission efficiency higher than a conventional device with low-density excitation.

Abstract: A nondestructive reading method for an isotopic label, capable of easily and quickly reading information on an isotopic label imparted to an article in advance without destroying the label, and a nondestructive reading-use isotopic label suitably using this method. In addition, information obtained by this nondestructive reading method is used to easily and quickly judge the authenticity of an article.

Abstract: A current injection-type diamond ultraviolet light-emitting device is provided that achieves the diamond free exciton recombination radiation by forming electrodes on a high-quality diamond crystal and applying a DC voltage between electrodes to inject carriers. A diamond crystal can be selected in terms of photoluminescent spectrum at room temperature and the half width of the Raman scattering peak intrinsic to the diamond.

Abstract: A 12C or 13C isotopic diamond which is boron-doped and has an extremely high thermal conductivity, and a process for producing the same. The purity of the 12C or 13C isotope of said isotopic diamond is preferably at least 99.5%.

Abstract: A lighting apparatus constructed by holding a linear light source, a radiating plate, a reflecting plate, a light guiding plate, a diffusing plate, and a lens between upper and lower frames. One of the upper and lower frames is provided with pins. The other frame, the radiating plate, the reflecting plate, the light guiding plate, the diffusing plate and the lens have holes in locations corresponding to the pins. The upper and lower frames have protrusions and recessions into which the protrusions are fitted, respectively. The lighting apparatus is easily assembled without using vises by fitting the pins into the holes of the respective component members to place them in position and engaging the protrusions and the recessions of the upper and lower frames. Moreover, a harness of the linear light source is inserted into a slit formed on a surface of the upper frame which does not face the linear light source, and fixed by a stopper.

Abstract: The present invention relates to a compound represented by the general formula (I): ##STR1## [wherein R.sup.1 is a lower alkyl group or the like, R.sup.2 is a lower alkyl group or the like, R.sup.3 and R.sup.4, which may be the same or different, are halogen atoms or the like, R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, are halogen atoms or the like, and X is .dbd.N-- or .dbd.CH--] or a pharmacologically acceptable salt thereof, which has inhibitory effect on acyl-CoA:cholesterol O-acyltransferase (ACAT), a process for producing said compound, and uses of said compound.

Abstract: An N-heteroaryl-N'-phenylurea derivative represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are as defined in the description of the specification which is useful as a prophylactic and therapeutic agent for hypercholesterolemia, atherosclerosis and diseases caused by them.

Abstract: A liquid crystal display device with a built-in back light device for illuminating a liquid crystal element. The back light device includes a light transmitting plate disposed behind the liquid crystal element, a light source disposed in the vicinity of one end of the light transmitting plate, a reflector for reflecting light from the light source towards the light transmitting plate, the reflector being integrated to the light source, and a slide mechanism for allowing the reflector to be slidably detached from the light transmitting plate.

Abstract: A transmissive liquid crystal display device is comprised not only of a light scattering plate disposed behind a liquid crystal display cell, a light diffusing film disposed behind this light scattering plate and a light source lamp and a reflective plate disposed behind this light diffusing film but also of a transparent plate disposed between the light diffusing film and the light source lamp. The reflective plate serves to direct backward propagating light from the source lamp towards the liquid crystal display cell, and the transparent plate has an indentation formed on its back surface. This indentation is shaped correspondingly to the shape of the light source lamp and contains the light source lamp inside.

Abstract: Several embodiments of motor vehicles having transversely disposed supercharged engines. In each embodiment, the supercharger is positioned at one end of the engine so as to receive a source of unobstructed cooling air flow into the engine compartment. In each embodiment, the supercharger is driven directly from the engine but at the end opposite to which the normal accessories are driven. In some embodiments, the supercharger is driven from the engine flywheel and in other embodiments, it is driven either from one end of a camshaft or by means of an externally positioned shaft driven from the accessory end. In certain embodiments, the radiator is positioned in an offset relationship so that the supercharger does not receive air that is heated by the radiator and a baffle is provided for precluding against the transmission of heat to the supercharger.

Abstract: A motor vehicle having a transversely disposed supercharged engine. The engine output shaft is connected to a flywheel which is connected to a transmission for driving the front wheels of the vehicle. The supercharger is positioned at one end of the engine and is driven directly from the engine flywheel by a belt drive. The other engine accessories are driven at the opposite end of the engine.

Abstract: An N-heteroaryl-N'-phenylurea derivative represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are as defined in the description of the specification which is useful as a prophylactic and therapeutic agent for hypercholesterolemia, atherosclerosis and diseases caused by them.