Showing papers by "Mitsubishi published in 1987"

Ubiquitin is a component of paired helical filaments in Alzheimer's disease

Abstract: Paired helical filaments (PHF), which constitute a distinct type of pathological neuronal fiber, are the principal constituent of neurofibrillary tangles that occur in the brain of patients with Alzheimer's disease. Their insolubility in sodium dodecyl sulfate and urea has prevented the analysis of their subunit composition by gel electrophoresis. A monoclonal antibody (DF2) was isolated that specifically labeled PHF at both the light and electron microscopic levels. It labeled a small polypeptide (5 kilodaltons) that was shown to be ubiquitin in immunoblots of the soluble fraction of brain homogenates. To obtain direct evidence that ubiquitin is a component of PHF, PHF were treated with concentrated formic acid and digested with lysylendopeptidase; ubiquitin-derived peptides were then identified by reversed-phase high-performance liquid chromatography. Two fragments in the PHF digest were identified as derived from ubiquitin by protein sequencing. This procedure should make possible definitive identification of other PHF components.

Apparatus for controlling electric motor

Abstract: A control apparatus for controlling the main circuit for driving an AC electric motor consisting of a diode converter and a pulse width modulation (PWM) power converting device, in which it is arranged that the DC current as the output of the diode converter is detected by a current detector, the AC component of this DC current is filtered through a high-pass filter, and a pulse-width-modulation control is exercised by a control circuit in response to the output of the high-pass filter so that the DC current as the output of the diode converter may be smoothed out in the main circuit by the PWM power converting device. By such arrangement, this control apparatus of an electric motor is made smaller in size and simplified in structure and enabled to control the power factor of the power source of the diode converter to close to 1.0.

Pyridinecarboxamide derivatives and their use as fungicide

Abstract: Disclosed are novel pyridinecarboxamide derivatives represented by the general formula: ##STR1## wherein X represents a halogen atom, methyl group or trifluoromethyl group, R represents a lower alkyl group or halogen atom, n represents an integer of 1 to 6, and m represents 0 or 1, and a fungicide containing such derivative as active ingredient.

Amplitude-adaptive vector quantization system

Abstract: An amplitude-adaptive vector quantization system intended for efficient signal coding and decoding. A mean value separation circuit (2) separates the mean value from an input signal which has been divided into blocks, and a tree-search vector quantizer (6) implements tree-search inner product vector quantization so that index information is truncated depending on the detected vector amplitude, thereby reducing the volume of information for transmission.

Giant linear plasmids in Streptomyces which code for antibiotic biosynthesis genes

Abstract: A number of examples of circular plasmids with specific functions are known in both prokaryotes and eukaryotes. Several linear plasmids have also been identified, but these are all relatively small: large linear plasmids cannot be separated from chromosomal DNA by conventional techniques. There are several cases where the genetic evidence suggests that a character is encoded by a plasmid but no plasmid can be physically detected. This has been the case for antibiotic synthesis genes in Streptomyces; in particular a plasmid SCP1 in Streptomyces coelicolor has been shown to be involved in methylenomycin production by genetic evidence. We report here the application of orthogonal-field-alternation gel electrophoresis to the isolation of linear plasmids from Streptomyces. We have discovered a large linear plasmid of around 520 kilobases in Streptomyces lasaliensis and subsequently similar giant linear plasmids in other Streptomyces strains. We have confirmed that genes for methylenomycin biosynthesis are located on a series of giant linear plasmids in S. coelicolor. These observations may bear on the genetic variability and unstable genetic character of Streptomyces species.

Numerical control apparatus

Abstract: A numerical control apparatus comprising a display device capable of displaying not only the configuration of a workpiece to be machined and the machining paths of machining tools relative to the workpiece but also the movement of the workpiece as a machining path of relative movement of the machining tool with respect to a stationary workpiece. The machining path of the relative movement of the machining tool is obtained based on data representing the movement of the workpiece per se.

Motor-driven power steering system for a vehicle

Abstract: A motor-driven power steering system for a vehicle capable of preventing a motor-related element such as a motor itself, power elements for controlling power supply to the motor or the like from being damage due to an abnormal temperature rise or overheating thereof, thereby substantially avoiding or reducing resultant unsureness or instability in the operator's steering feeling upon change in steering mode as well as improving safety in steering operation. The motor is operatively connected with a steering rack and energizable by a power source for power assisting the steering motion caused by the operator through a steering wheel. A temperature sensor detects the temperature of the motor-related element. An electromagnetic switching clutch is interposed between the motor and the steering rack for selectively establishing and interrupting the transmission of power assisting force from the motor to the steering rack in accordance with the travelling speed of the vehicle. A control uint is provided for controlling the operation of the motor in such a manner such that when the detected temperature of the motor-related element is higher than a prescribed level, the current supplied to the motor through the motor-related element is gradually reduced to lower the temperature of the motor-related element.

Biogeochemical studies on the transport of organic matter along the Otsuchi River watershed, Japan

Abstract: The distributions and stable isotope ratios of biogenic nitrogen and carbon were investigated in detail along a small watershed in order to establish a biogeochemical framework for assessing the fate of organic matter. Forest ecosystems supply soluble and particulate materials to river systems which are depleted in 15N and 13C. The number of suspended particles and the concentrations of δ15N and δ13C in the river sediments increased along the watershed, indicating a change from river to marine ecosystems. Dramatic variation of δ15N and δ13C were observed in the intertidal sediments, where the progress of denitrification, discharge of domestic sewage, and the accumulation and the decomposition of macroalgae and seagrasses took place. The contribution of land-derived organic matter to estuarine sediments has been estimated from δ13C and from δ15N data. The contribution the landderived organo-silty-clay mineral was 70–100% in the inner bay sediments and 34–42% at the open bay. Possible factors that influence the variation of stable isotope ratios along the watershed are discussed. The relationship between the sizes of particles and isotope ratios clearly demonstrated that organo-silty-clay minerals with diameter smaller than 64 μm were the major source of land-derived refractory organics.

Semiconductor integrated circuit

Abstract: A semiconductor integrated circuit comprising a plurality of blocks the included circuit components, where the blocks are separated from each other in a semiconductor substrate. Wiring is conducted by using horizontal and verticle wirings along the horizontal and vertical lines of an imaginary wiring grid established in a wiring region between the blocks and diagonal wirings are provided in the process of producing the blocks, wherein the diagonal directions are relative to the horizontal and vertical directions of the imaginary wiring grid.

Vertical type MOS transistor and method of formation thereof

Abstract: A vertical MOS transistor having its channel length determined by the thickness of an insulating layer provided over a semiconductor substrate, rather than by the depth of a trench in which the transistor is formed. As a result, the characteristics of the transistor as relatively unaffected by doping and heat-treatment steps which are performed during formation. Also, the transistor may be formed so as to occupy very little surface area, making it suitable for application in high-density DRAMs. 0O048455372

Method of restoring transmission line

Abstract: When a trouble occurs on a transmission line, each station transmits a predetermined frame to the adjacent station. The station which does not receive the frame outputs to the adjacent downstream station a frame instructing that its primary output be looped back to its secondary input. The information transmission trouble is removed by arranging the responses to the frames by the respective stations and the transmission procedure.

Method of laser marking

Abstract: A pigment layer is provided on a surface of an article on which a marking is to be formed and is irradiated with patterned laser light to change internal molecular structure of pigment to thereby change its color. The marking can be multicolored by a suitable selection of pigment and laser energy density.

An Adaptive Multiple Beam System Concept

Abstract: An adaptive multiple beam system, which has flexibility to adapt beam power to varying beam traffic, is proposed. The multiple beam transmitter, which is called "hybrid transponder" in this paper, consists of a pair of multiport hybrids and a set of amplifying elements. Power combining, isolation, and intermodulation characteristics of this multiport network are analyzed. Also, a new interbeam exchange and feeder link connection concept, which serves as the basis for an adaptive multiple beam system, is proposed. Finally, characteristics of an experimental 8-amplifier 8-port hybrid transponder are described.

Variable delay circuit for delaying input data

Abstract: An address counter (2) counts the clock pulses sequentially to provide a count value as an address signal to a coincidence detecting circuit (3) and decoder (4). The coincidence detecting circuit (3) compares delay data applied from a delay data generating circuit (8) with the address signal and applies a reset signal to the address counter (2) when they coincide with each other. The address counter (2) repeats sequentially the above-mentioned operation in response to the reset signal after the count of address is reset to a predetermined value. The decoder (4) specifies a memory cell comprised in a memory device for performing a reading and writing operation in response to the address signal. The data output circuit (6) and the data input circuit (5) perform the reading and writing operation sequentially to the specified memory cell in response to the control signal outputted from the control circuit (7). As a result, the input data previously written is read and outputted with a delay. Therefore, a delayed input data can be obtained as an output data.

Method of resin encapsulating a semiconductor device

Abstract: A semiconductor device and a method for manufacturing a semiconductor device of a type having a resin package and a window in the package such as a quartz glass window transparent to ultraviolet rays. A semiconductor chip is bonded onto a surface of a die pad of a lead frame. A softened resin is then extruded from the opposite surface of the die pad through gaps between the die pad and the leads with the extrusion being carried out in an inert gas atmosphere. An inner package member is thus formed surrounding the semiconductor chip. An outer package member, made of a thermosetting resin having a weight ratio of resin to filler less than that of the inner package, is molded around the chip assembly and inner package.

Catalyst for olefin polymerization

Abstract: A catalyst for olefin polymerization which comprises a combination of: Component which is a solid catalyst component A obtained by contacting a component (i) which is a solid component comprising titanium, magnesium and halogen as essential elements with a component (ii), which is a silicon compound represented by formula: R 1 R 2 3-n Si(OR 3 ) n where R 1 stands for a branched hydrocarbon radical, R 2 stands for a hydrocarbon radical which is the same as or different from R 1 and n stands for a number satisfying an equation: 1≦n≦3; Component B which is an organoaluminum compound; and Component C which is a compound represented by a formula M(OR 4 ) x R 5 y X z in which M stands for an element selected from the group consisting of B, Al, C, Si, Sn, P, S, Cl, Br, I, Fe, Ti, V, Zr, Mg, Ca and Zn, R 4 and R 5 each stand for a hydrocarbon radical having 1 to 20 carbon atoms which are the same as or different from each other and X stands for halogen atom, each of x, y and z is a number which is equal to zero or is equal to or less than the valence of the element M and the sum of x, y and z is equal to the valence of the element M.

Electric element circuit using oxidation-reduction substances

Abstract: The present invention relates to a redox electric element circuit formed by using oxidation-reduction substance such as electron-transport protein or the like. Oxidation-reduction substance arranged between redox electric elements and the like is inactivated by energy beam irradiation to form insulating matter, so that wirings and element separation structure are established between redox electric elements and the like.

Process for preparation of water absorptive composite material

Abstract: Aqueous solution of alkali or ammonium acrylate is applied to a prefabricated fibrous substrate, and the acrylate is subjected to polymerization in two steps, namely the first step in which the acrylate is polymerized by means of a radical polymerization initiator and the second step which is subsequent to the first step and in which the unpolymerized acrylate is polymerized by means of heat treatment at 100°-250° C.

Hybrid promoter, expression controlling DNA sequence and expression vector

Abstract: The present invention provides novel hybrid promoters comprising an RNA polymerase recognition region having a base sequence equivalent to that of the RNA polymerase recognition region of a phage promoter, and an RNA polymerase binding region having a base sequence equivalent to that of the RNA polymerase binding region of an E. coli promoter. Disclosed also are expression-controlling DNA sequences comprising said hybrid promoter and an operator region having a base sequence equivalent to that of the operator region of E. coli, which allow for efficient expression in a well-controlled manner. Disclosed further are expression vectors comprising a terminator and the gene encoding a target protein as well as said expression-controlling DNA sequence.

Method of chromatographic separation

Abstract: A chromatographic separation process employing fewer beds packed with an adsorbent, while enabling separation of feedstock fluid, containing a plurality of components which have different degrees of affinity for the adsorbent, into constituent fractions which are withdrawn separately. According to at least one preferred embodiment, a step of supplying feedstock fluid to the simplified separation apparatus is prece­ded and followed by a step of circulating the fluid through the apparatus, a cycle of supply - desorbing - circulation being carried out repeatedly.

Road navigation system

Abstract: A road navigation system comprises a plurality of guidance information transmitter systems disposed along a route, each transmitter system generating current location information in the form of extremely-low-powered electric waves, and a guidance signal generator system for providing guidance information for the benefit of a user. The guidance signal generator system comprises a receiver unit for receiving the current location information from the guidance information transmitter system, an input unit for inputting destination information, a memory unit for storing available map information and the inputted destination information which can be prepared as route information to be traced, a data processor unit for comparing the route information with the current location information received by the receiver unit and for producing the guidance information, and an output unit for communicating the guidance information to the user. The guidance signal generator system can provide the user with accurate guidance information within a relatively small area covered by the low-powered electric waves from the transmitter system.

Blockage of chloride channels by HEPES buffer

Abstract: Chloride channels of neurons of Drosophila are blocked when the cytoplasmic side of the membrane is exposed to the commonly used buffering agents 4-(2-hydroxyethyl)-1-piperazine ethanesulphonic acid (HEPES) and 4-morpholinepropanesulphonic acid (MOPS). In the presence of these compounds, chloride channels appear to function as a complex of multiple protochannels.

Semiconductor card which can be folded

Abstract: A thin semiconductor card, such as an IC card, includes a card main body, and a semiconductor module mounted therein. A foldable part or member is provided permitting the card main body to be folded.

Diamond-coated tungsten carbide-base sintered hard alloy material for insert of a cutting tool

Abstract: A diamond-coated tungsten carbide-base sintered hard alloy material for inserts of cutting tools, which has greatly improved bond strength or degree of bonding of the diamond coating layer to the matrix and therefore is capable of exhibiting excellent cutting performance over a long period of time. The sintered hard alloy material comprises: (1) a matrix of a sintered hard alloy consisting essentially of 1-4 percent by weight cobalt, and the balance of tungsten carbide and inevitable impurities, the tungsten carbide having a coarse grain structure having an average grain size of 2-10 microns; and (2) a diamond coating layer formed over surfaces of the matrix by forming an etching layer over the matrix surfaces and then forming the diamond coating layer over the matrix surfaces via the etching layer by a low pressure vapor-phase synthesization method. If required, the matrix may further contain CO1-CO8 (ISO) free carbon.

Variable delay circuit for delaying input data

Abstract: A bit length corresponding to a delay time of required data is preset in a bit length setting circuit (15). A write timing signal from an external control circuit (6) is applied to a write address decoder (3) and a read timing signal generating circuit (2). Input data is written into memory cells in a memory device (5) addressed by the write address decoder (3) operating in response to the write timing signal. On the other hand, a read timing signal generating circuit (2) generates a read timing signal delayed from the write timing signal by a delay time corresponding to a bit length signal in response to the bit length signal from the bit length setting circuit (15) and the write timing signal from outside. The read address decoder (4) sequentially addresses memory cells containing input data which have been written, reads written data and then outputs output data. Applications of the circuit include frame synchronization, variable delay and storage of picture data in a video communications system.