Abstract: A noise reduction apparatus in an FM stereo tuner including a circuit for generating a stereo sum signal and a stereo differential signal; a noise eliminating circuit for dividing, in accordance with several frequency bands, the stereo differential signal into several divisional signals and for outputting, in accordance with signals levels corresponding to the frequency bands, a composite signal of divisional stereo differential signals respectively corresponding to the signal levels; and a circuit for reproducing a stereo signal from the composite signal and the stereo sum signal.

Abstract: A VCA circuit is used at an input stage of communication device, an OA device or the like. The VCA circuit includes an output varying circuit which distributes a current supplied from a power supply side in accordance with a predetermined coefficient. The VCA circuit also includes an operational amplifier provided on an input side of the output varying circuit, and a feedback resistor connected between one of two input terminals and an output terminal of the operational amplifier. An input signal is applied to one of the two input terminals of the operational amplifier, a signal output from the output varying circuit is applied to the other input terminal. An output signal of the VCA circuit is drawn from the output terminal of the operational amplifier.

Abstract: This invention relates to a heating method for forming a thermoplastic bottle in which a heating member is inserted into the interior from a preform made of a thermoplastic material or the bottle and the preform or plastic bottle is heated by the heating member and a heating device located externally so as to thereby heat the same simultaneously internally and externally thereof, the temperature of the respective heating member being controlled respectively. Radiant heat energy distribution is variable along the longitudinal direction of the heating member so as to carry out the heating process in conformity with the bottle to be formed so as to manufacture the plastic bottle with high quality.

Abstract: A voltage-current conversion circuit comprises a transistor (Q1) on the input side whose emitter is employed as the input terminal (IN), and a transistor (Q2) on the output side whose base is connected to the base of the transistor (Q1), and the collector current and the emitter current of the transistor (Q1) on the input side are made equal to the collector current of the transistor (Q2) on the output side with the aid of current mirrors circuits (1 and 2). Hence, the transistors on the input and output sides are equal in base-emitter voltage to each other, and the non-linear distortion is therefore eliminated. In addition, the inflow or outflow of current from the input voltage source is zeroed, so that a high input impedance is obtained.

Abstract: Disclosed is a packing can having a circumferential polyhedral wall formed on a can barrel, in which as compared with boundary ridgelines of structural unit faces of the polyhedral wall and crossing points of these boundary ridgelines, the structural unit faces are convex to the interior of the can and the structural unit faces are arranged so that adjacent rows of structural unit faces have a phase difference in the axial direction of the can. This packing can has a very high strength against deformation by application of the external pressure. Furthermore, in preparing this packing can, damage of a coating layer formed on a metal sheet used as the can barrel blank can be effectively prevented.

Abstract: A noise reduction apparatus in an FM stereo tuner including a circuit for generating a stereo sum signal and a stereo differential signal; a noise eliminating circuit for dividing, in accordance with several frequency bands, the stereo differential signal into several divisional signals and for outputting, in accordance with signals levels corresponding to the frequency bands, a composite signal of divisional stereo differential signals respectively corresponding to the signal levels; and a circuit for reproducing a stereo signal from the composite signal and the stereo sum signal.

Abstract: This invention relates to a heating method for forming a thermoplastic bottle in which a heating member is inserted into the interior of a preform made from a thermoplastic material or the bottle and the preform or plastic bottle is heated by the heating member and a heating device located externally so as to thereby heat the same simultaneously internally and externally thereof, the temperature of the respective heating member being controlled respectively. Radiant heat energy distribution is variable along the longitudinal direction of the heating member so as to carry out the heating process in comformity with the bottle to be formed so as to manufacture the plastic bottle with high quality.

Abstract: Activated carbon, useful in a pharmaceutical composition for adsorbing exogenous or endogenous toxins from the gastrointestinal tract of a patient can be prepared by a process including a step of treating activated carbon with an aqueous ammonia solution to provide a resultant activated carbon having a pH of 6 to 8.

Abstract: Disclosed is a pharmaceutical composition having an antidotal activity, which in dosage unit form is capable of adsorbing exogenous or endogenous toxins in the gastrointestinal tract of a patient without disintegration of said pharmaceutical composition and without causing the patient to become constipated. The active ingredient comprises spherical particles of an activated carbon wherein at least 85% in number of said spherical particles of activated carbon are microscopically spherical particles which have smooth and convex-curved surfaces without sharp edges. Specific physical parameters of the carbon particles include, maximum to minimum diameter ratios of 1.0 to 1.3, diameters of 0.05 to 2.0 mm and pore cavity volume of not more than 0.5 cc/g determined in the range of pore-radius of 5000 to 75,000 .ANG.. Dosage unit forms included, capsules, tablets, and aqueous slurries.

Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.

Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.

Abstract: This invention relates to hydroxyapatite, ceramic material, implant material and a process for preparing thereof. The ceramic material is hydroxyapatite ceramic having an excellent thermal stability.

Abstract: A novel adsorbent for ethylene prepared by contacting an active carbon with at least one metal substance selected from the group consisting of copper, iron, cobalt, nickel, and their salts in the presence of nitric acid; heating the same at a temperature of 150.degree. to 900.degree. C. in an atmosphere of inert gas and thereby to obtain the adsorbent containing 0.01 to 20% by weight of said metal(s) therein.

Abstract: A process for producing spherical particles of activated carbon having a low susceptibility to dusting.

Abstract: An absorbant for use in artificial organs which is obtained by mixing and dissolving pitch with an aromatic compound and a polymer or copolymer of a chain hydrocarbon, dispersing the resultant mixture in water giving rise to beads and subjecting these beads to a series of treatments of removing of the aromatic hydrocarbon, infusibilizing, carbonizing and activating.

Abstract: A method for the preparation of a porous carbon molding having a low apparent density, the method comprising the steps of thermally mixing a pitch, which has a softening point of 50.degree. - 350.degree. C, a carbon content of 80 - 97 wt%, a hydrogen/carbon ratio of 0.3-2.5 and a nitrobenzene-insoluble fraction of below 60 wt%, with at least one aromatic hydrocarbon having a boiling point of 200.degree. C or higher, forming the mixture into a suitable shape, immersing the formed material in a solvent, in which the pitch is hardly soluble but the aromatic hydrocarbon is easily soluble, for extracting the aromatic hydrocarbon from the formed material and obtaining a porous pitch material, oxidizing the porous pitch material at a temperature from room temperature to 400.degree. C by the use of an oxidizing agent to form an infusible porous pitch material, and calcining the infusible porous material in an inert atmosphere at a temperature higher than 600.degree. C to obtain a porous carbon material.