Abstract: An improvement is proposed in the so-called urea method for the preparation of fine particles of yttrium oxide, according to which, while an aqueous reaction mixture containing a water-soluble yttrium salt, e.g., nitrate, and urea dissolved therein in specified concentrations is heated at 90.degree. to 100.degree. C. to effect precipitation of yttrium carbonate hydroxide particles followed by calcination of the carbonate hydroxide in air into yttrium oxide, the aqueous reaction mixture is diluted with addition of a specified volume of preheated water within a critical period between incipient appearance of turbidity in the reaction mixture by the precipitation of the carbonate hydroxide and a moment 30 minutes thereafter. In this way, the yttrium oxide particles obtained have a globular particle configuration with a very small average particle diameter D.sub.50 in the range from 0.1 to 0.3 .mu.m and are suitable for use in various fine applications.

Abstract: An electrode for a rechargeable battery with a nonaqueous electrolyte is provided wherein the active material layer has a sufficient flexibility, the adhesion between the active material coating and the metal foil collector is good, none of peeling, falling, cracking and other unfavorable phenomena occur in the active material coating in the step of assembling a battery and excellent discharge characteristics can be developed. The electrode for a rechargeable battery with a nonaqueous electrolyte comprises a metal foil collector and, formed on at least a part of the metal foil collector, an active material layer comprising an active material and a cured reaction-curing binder as essential components.

Abstract: A lipids-lowering agent which comprises an angiotensin II antagonist as an active ingredient.

Abstract: Disclosed is a method for the preparation of particles of a rare earth ammonium double oxalate by mixing a first aqueous solution of ammonium oxalate and a second aqueous solution of a water-soluble rare earth salt. The double oxalate particles have a polyhedral particle configuration with a uniform particle size distribution, from which a rare earth oxide powder of a polyhedral particle configuration with good flowability can be obtained by calcination, when the first and second aqueous solutions are prepared under exact control of the concentrations of the respective ionic species and the aqueous slurry containing the precipitates of the double oxalate is subjected to an aging treatment during which changes take place in the particle morphology and in the crystallographic structure of the double oxalate particles.

Abstract: Proposed is a method for the preparation of a rare earth phosphate powder or, in particular, a composite rare earth phosphate powder of lanthanum, cerium and terbium having properties suitable for use as a base material of phosphors in fluorescent lamps in respect of particle size distribution of 1-10 .mu.m and globular particle configuration. The method is basically a precipitation method by mixing aqueous solutions of a water-soluble salt of the rare earth element or elements and phosphoric acid but the inventive method is characterized by completing introduction of the rare earth salt solution into the phosphoric acid solution within a limited length of time of 3 seconds to 5 minutes at a specified temperature, each of the solutions having a specified concentration.

Abstract: Proposed is a method for the preparation of a rare earth oxide powder consisting of particles having a globular particle configuration to be suitable as a base material of phosphors. The method comprises the steps of mixing an aqueous solution of a rare earth salt and an aqueous alkaline solution, e.g., ammonia water, to precipitate a rare earth hydroxide which is collected, washed with water and calcined to be converted into the oxide powder. Characteristically, the precipitation reaction of the rare earth hydroxide is carried out in the presence of a nitrogen-containing chelating agent such as triethanolamine in the aqueous medium in a controlled amount.

Abstract: Proposed is a method for the preparation of a powder of lanthanum manganite having excellent flowability with an angle of repose not exceeding 45.degree.. Different from conventional methods for the preparation of lanthanum manganite powder by the calcination of a powder blend of thermally decomposable compounds of lanthanum and manganese or by the precipitation of a composite carbonate of lanthanum and manganese with addition of an aqueous solution of ammonium carbonate to an aqueous solution of lanthanum and manganese compounds followed by calcination of the composite carbonate, the invention proposes to precipitate the composite carbonate by the addition of ammonium carbonate in a particulate form to the aqueous solution of lanthanum and manganese compounds followed by calcination of the composite carbonate.

Abstract: An improved method is proposed for the preparation of a powder of a rare earth oxide having good dispersibility containing no agglomerates of particles even without undertaking disintegration indispensable heretofore. The improved method comprises precipitation of a rare earth carbonate by the admixture of an aqueous solution of an inorganic rare earth salt with an aqueous solution of ammonium hydrogen carbonate in an excess amount over the stoichiometrically equivalent amount to give a slurry of the rare earth carbonate which is subjected to heating treatment in two steps each under specified conditions to effect aging of the carbonate precipitates.

Abstract: A precipitation method is proposed for the preparation of a rare earth phosphate powder by the reaction of a water-soluble salt of the rare earth element in an aqueous solution with an ammonium phosphate, which gives a rare earth phosphate powder consisting of non-agglomerate discrete particles having a spherical particle configuration suitable as a base material of rare earth-based phosphors. The method is characterized by the addition of the ammonium phosphate in the form of a powder to an acidic aqueous solution of the rare earth salt under specified conditions in contrast to the conventional method in which the ammonium phosphate is admixed in the form of an aqueous solution.

Abstract: An improved method is proposed for the preparation of a composite carbonate powder of lanthanum, cerium and terbium as a base material of a green-emitting phosphor for which the carbonate powder is desired to have a uniform particle size distribution and a particle configuration as close to spherical as possible. The improved method is characterized by two-step heat treatment of the carbonate slurry formed by the addition of, for example, ammonium hydrogen carbonate to a mixed aqueous solution of lanthanum, cerium and terbium nitrates each under specified conditions while the pH of the aqueous slurry is adjusted to 5.0 to 7.5 after the first step heat treatment but before the second step heat treatment.

Abstract: The present invention provides expandable plastics having a molecular weight of 50,000 to 500,000 which comprises the following structural units (I), (II) and (III) giving a foam having heat resistance and fine structure by heating, the molar ratio of (I+II) to (III) being 1 to 0.6-1.5 and the proportion of (I) being 5 to 50 wt. % of the total components: ##STR1## wherein R represents a hydrogen atom or a methyl group. When the copolymer, the expandable plastics, of the present invention is used, white foams having a very fine texture are obtained without using special foaming agents, and besides the heat resistance of the foams is high and the amount of water absorbed thereby is little. The foams of the present invention, therefore, can be used in a wide range as soundproofing materials and heat insulators for which the conventional foams cannot be used because of their low heat resistance, and substitutes for honeycomb structures used in airplanes.

Abstract: There is disclosed a catalyst which hydrotreats hydrocarbons without need of presulfiding. The catalyst comprises a carrier of an inorganic oxide containing a sulfurizing agent and a water-soluble compound of two metals one of which belongs to the Group VI of the Periodic Table, while the other belongs to the Group VIII. The carrier has pores in which a precursor of a sulfide is formed. The coordination number of the closest Group VI metal found from the radial distribution function around the Group VI metal is less than 0.25. The function is obtained from the Fourier transform of the extended x-ray absorption fine structure of the precursor.

Abstract: Catalysts for hydrotreating hydrocarbons are composed of a carrier substance consisting essentially of an oxide of aluminum and/or an oxide hydrate of aluminum, at least one compound selected from water-soluble compounds of metals of Group VI and Group VIII of the Periodic Table and at least one organic compound selected from mercapto-carboxylic acids of formula HS--(CH.sub.2).sub.n --COOR (where n is 1 to 3; R is H, alkali metal, alkaline earth metal or ammonium group or alkyl group with 1-10 carbons), thio-acids of formula R'--COSH (where R' is monovalent hydrocarbon with 1-15 carbons), amino-substituted mercaptans of formula H.sub.2 N--R"--SH (R" is divalent hydrocarbon with 1-15 carbons), dimercaptans of formula HS--R"--SH (R" is same as above) and mercapto-alcohols of formula (R.sup.a S--R"'--(OH).sub.n (where R"' is hydrocarbon with 1-15 carbons; R.sup.a is H or alkyl group with 1-2 carbons; and n is 1-2), and optionally phosphoric acid.

Abstract: A catalyst for the hydrotreatment of a hydrocarbon oil comprises a carrier of an inorganic oxide and an active component supported on the carrier and formed of at least one member selected from the group consisting of water-soluble compounds of molybdenum, tungsten, and the metal of Group 8 in the Periodic Table of Elements and at least one mercapto (--SH) group-containing organic compound selected from the group consisting a mercaptocarboxylic acids represented by the general formula:HS--(CH.sub.2).sub.n --COOR(wherein n stands for an integer in the range of 1 to 3 and R for a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a linear or branched naphthenic alkyl group having 1 to 10 carbon atoms), amino-substituted mercaptans represented by the general formula:H.sub.

Abstract: Supported catalysts for hydrotreating hydrocarbons comprise (a) at least one member selected from the group consisting of oxides of metals in Groups IV and VIII of the Periodic Table, and (b) at least one organic compound having a mercapto radical or radicals (--SH) selected from the group consisting of mercapto-carboxylic acids, including alkali metal, alkaline earth metal and ammonium salts thereof and esters thereof, bivalent mercaptans, amino-substituted mercaptans, and thiocarboxylic acids. These catalysts can be easily activated by treatment in the presence of hydrogen gas at a temperature in the range from room temperature to 400.degree. C. show higher activity than catalysts activated by conventional methods.

Abstract: A callsign display device for a transceiver which receives a radio wave carrying a coded digital signal of a data including a callsign for amature wireless radio communication. The callsign display device includes a display circuit for displaying the callsign by decoding the data including the callsign.

Abstract: An apparatus for controlling a transmitter-receiver which can transmit and receive an aural signal and a data signal. In the transmission mode, the control apparatus detects a data transmission instruction of the transmitter-receiver and changes to the mode in that the data signal is supplied to the transmission unit of the transmitter, thereby executing the data transmission. On the other hand, in the reception mode, the control apparatus discriminates that the signal received is the transmission data to the transmitter-receiver and reduces the output volume of the receiving unit, thereby allowing the transmitter-receiver to receive the reception signal as the data signal.

Abstract: The present invention relates to a bracket which can mount different units to a vehicle body without the use of additional spacers or the like. The bracket has an offset support bolt so that upon the bracket being seated in a 180 degree reversed orientation, the bolt assumes a new position with respect to the vehicle body so that a different unit can be mounted using the same number of parts.

Abstract: Novel N-substituted heterocyclic derivatives represented by the formula, ##SPC1##Wherein R.sub.1 is hydrogen atom, lower alkyl, lower alkoxy, nitro, halogen or trifluoromethyl group; R.sub.2 is hydrogen atom or lower alkyl group; X is sulfur atom, sulfinyl or sulfonyl group; Y is ##EQU1## group (wherein R.sub.3 is phenyl or substituted phenyl group; R.sub.4 is hydrogen atom, hydroxy, lower alkyl, lower alkoxy, lower alkanoyl, lower alkanoyloxy, carbamoyl, N-(lower alkyl)-carbamoyl or N,N-di(lower akyl)-carbamoyl group; R.sub.5 is hydrogen atom, morpholino, pyrrolidinyl, piperidinyl, hexamethylenimino, lower alkyl, cyclo(lower alkyl), cyclo(lower alkyl)-(lower alkyl), hydroxy-(lower alkyl), (lower alkoxy)-(lower alkyl), phenyl or substituted phenyl group; k is 0 or 1 and m is 0, 1 or 2); and n is 3 or 4, and pharmaceutically acceptable salts thereof, which have excellent tranquillizing, anti-psychotonic, anti-emotional, anti-convulsive, anti-psychosis, sedative, analgesic or anti-hypertensive activities.