Abstract: A method for the quantitative determination of micro-organisms or pyrogens which comprises introducing a prescribed amount of a test liquor containing micro-organisms or pyrogens into a total carbon analyzer to obtain a total carbon value A, while removing micro-organisms or pyrogens from the prescribed amount of the same test liquor and introducing the resultant into a total carbon analyzer to obtain a total carbon value B, subtracting the total carbon value B from the total carbon value A and determining micro-organisms or pyrogens basing upon the resulting value, and an apparatus suitable for conducting the method.

Abstract: A head positioning device for use in a magnetic disk equipment includes a position detector for detecting the deviation of a magnetic head from the center line of a desired track on a magnetic disk, a comparator for generating a polarity signal indicative of the direction of the deviation of the magnetic head from the center line of the desired track, on the basis of the output of the position detector, and a microcomputer for calculating a correction value necessary for the precise positioning of the magnetic head on the center line of the desired track. An optimum correction value is determined for each of a plurality of tracks on the basis of measurement, immediately after the power supply of the magnetic disk equipment has been turned on, and an actuator mounted with the magnetic head is driven on the basis of the correction values thus obtained, to position the magnetic head very accurately.

Abstract: A control process and apparatus for the formation of silver halide grains comprising a mixer disposed outside of a reaction vessel containing an aqueous protective colloid solution and causing a nucleus formation (nucleation) and/or a crystal growth of silver halide grains. The process and apparatus further include: supplying an aqueous solution of a water-soluble silver salt, an aqueous solution of water-soluble halide(s), and an aqueous solution of a protective colloid to the mixer through supply conduits while controlling the flow rates of the solutions; mixing them while controlling the rotational speed of a stirrer of the mixer to form fine, silver halide grains; and immediately supplying the fine grains into the reaction vessel through a conduit connecting the mixer to the reaction vessel to perform the nucleus formation and/or the crystal growth of the silver halide grains in the reaction vessel.

Abstract: A flow control having a wide flow rate range and excellent linearity between the degree of valve opening and flow rate. The valve includes a cylindrical or conical valve head formed on a circular-truncated-cone-shaped working face which is tapered towards the outlet of the valve with the valve head being located inside the outlet-side casing. With respect to the area of the valve opening defined by the valve head and the valve seat, the valve head is shaped so that the rate of change of the flow rate with valve stroke is small and linear, whereby fine control of the flow rate can be accurately achieved over the entire flow rate range. The valve stroke to fully open the valve occurs in the inlet-side casing. A servo motor or the like is employed as the drive source for operating the valve.

Abstract: A ferromagnetic organic substance having a triaryl methane structure and a free radical concentration of methine carbon positions of at least 10.sup.17 radicals/g, preferably at least 10.sup.18 radials/g, is provided by polycondensing a condensed polynuclear aromatic compound or an electron donating group substituted monocyclic aromatic compound with an aromatic aldehyde in the presence of an acid catalyst, to produce a precondensate having a softening point between 30.degree. C. and 120.degree. C. and being soluble in various organic solvents, and subjecting the resulting precondensate to a dehydrogenation treatment and a purification treatment, followed by molding.

Abstract: An inner surface coating method for a piping having a step of causing an adhesive agent or a lining material to adhere to a curved portion of a pipe and sticking a reinforcing material transported by gas flowing inside the pipe at a constant flow speed of 1 to 120 m/sec to the adhesive agent or the lining material, and an inner surface coating device having a reinforcing material supplier using a reinforcing material, dispersion unit constituted by a closed primary dispersion tank for mixing the reinforcing material from a supply tank with gas supplied under pressure from a blower and by a closed secondary dispersion tank incorporating a dispersing rotary blade rotated by reinforcing material mixed gas supplied under pressure from the primary dispersion tank.

Abstract: A thermosetting resin composition is disclosed which comprises a fusible product obtained by a method including the steps of:providing a mixture which comprises (a) a raw material containing one or more condensed polynuclear aromatic compounds having at least two condensed benzene rings, (b) a crosslinking agent containing an aromatic compound having one or more aldehyde groups directly bonded to the aromatic nuclei thereof, and (c) an acid catalyst; andreacting the mixture at a temperature sufficient to effect the crosslinking of the one or more condensed polynuclear aromatic compounds, thereby to obtain the fusible product. A further heat treatment of the thermosetting resin composition gives a COPNA resin which is an infusible, insoluble, condensed, polynuclear aromatic hydrocarbon resin.

Abstract: A tandem seat for a two-wheeled vehicle comprises a bottom of hard synthetic resin to be fixed to a vehicle body, a pad of foam material to be placed onto the bottom and a trim cover assembly for covering the pad. In this tandem seat, recessed grooves are formed in the respective sides of the above-mentioned bottom and pad. These recessed grooves extend along the interfaces between the front and rear seat sections of the tandem seat. The trim cover assembly is thrust into the recessed grooves to separate the front and rear seat sections from each other, so that such an appearance like a split seat is obtained.

Abstract: A material for clothes is disclosed which is formed of a base cloth and a porous film having a number of very fine pores and coated on at least one surface of the base cloth. In this case, the pores are made to have a diameter about 0.1 to 5 .mu.m and the material has the percentage of dust permeation less than 50% for the dust with size larger than 0.3 .mu.m and moisture permeability more than 2500 g/m.sup.2 /24 hrs.

Abstract: A process for preparing an oil-in-water emulsion is described, comprising the steps of: adding a mixture of a hydrophobic substance and an emulsifying agent directly or after being dissolved in an organic solvent by heating in a dissolving-emulsifying tank with a high-speed agitation type dispersing means to form a hydrophobic substance solution as an oil phase, introducing water and/or an aqueous solution of gelatin into the tank through submerged inlet under the hydrophobic substance solution to form a water-in-oil emulsion, and further continuing the addition of water and/or an aqueous solution of gelatin to cause the phase inversion, whereupon the desired oil-in-water emulsion is formed. The mean particle size of the emulsion is decreased more than by the conventional emulsification method, and the particle size distribution is narrowed and made sharp.

Abstract: A dc motor driving apparatus comprising a full-wave rectifier bridge circuit for supplying dc power to a dc motor and a dc motor driving control circuit for controlling the turning on and off of thyristors forming the full-wave rectifier bridge circuit, further comprises a protecting control circuit operatively associated with the dc motor driving control circuit for preventing the occurrence of a short-circuit mode in the full-wave rectifier bridge circuit caused by a malfunction of the thyristors and ensuring highly efficient, quick responsive and stable control of the reversing, braking, stopping and other speed changing operations of the dc motor.

Abstract: A voice warning system for vehicles adapted to give a voice warning of a specified condition detected by one of a plurality of sensors in one of a plurality of items of a vehicle which are to be checked, includes a rank selector switch which classifies the items to be checked into a plurality of ranks of different priorities whereby when a given one of the ranks is selected, the generation of a voice warning is inhibited even if a specified condition is detected in any one of the items belonging to the rank or ranks lower in priority than the selected rank.

Abstract: A method of making a semiconductor device which has sharp corners on an upper surface and wherein a passivation layer is formed over said surface and windows are formed in the passivation layer for the attaching and formation of electrodes in which a photoresist material is placed over the passivation layer and selectively removed so as to leave areas of photoresist at locations over said passivation layer wherein electrodes are to be formed after which a layer of metal is formed over the surface and the metal and photoresist is removed at those portions where the photoresist layer remained after which passivation the area is etched through the windows in the metal layer and the metal layer is then removed and the electrodes are formed in the windows.