Showing papers by "Mitsubishi published in 1981"

Electrode unit for electrically heating underground hydrocarbon deposits

Abstract: An electrode unit for electrically heating underground hydrocarbon deposits having a main conduit pipe assembly, a cylindrical water pipe and an electrical conductor arranged coaxially with the electrical conductor disposed between the water pipe and the main conduit pipe assembly. The spaces between the main conduit pipe assembly and the cylindrical water pipe are filled with a solid insulating material, wherein it is not necessary to recirculate cooling oil through the assembly. Connectors are disposed for joining ends of adjacent main conduit pipe assemblies, ends of adjacent water pipes and electrical conductors. Preferably, the electrical conductor is made of a material such as a metal mesh which can stretch longitudinally.

The effect of nonstoichiometry on the positive temperature dependence of strength of Ni3AI and Ni3Ga

Abstract: Compression tests have been carried out on the polycrystalline Ni3Al and Ni3Ga alloys over the temperature range 77 ~ 1000 K. The flow stress and the temperature dependence of strength are found to be sensitive to small composition change within the phase field. The anomalous strengthening of these compounds with temperature is more significant for Al-and Ga-rich deviations than for Ni-rich deviations from stoichiometry. The change in activation constant of these compounds derived from the flow stress increment appears to be discontinuous at the stoichiometric composition. The influence of deviations from stoichiometry on the temperature dependence of strength could be accounted for by the phase stability concept proposed by the present authors. It is concluded that the phase stability of the Ni3Al and Ni3Ga alloys with respect to the D022 phase as well as the D019 phase are reduced as the composition of the minority component is increased. This change leads to the relatively reduced {100} antiphase boundary energy which increases the propensity for the cross slip onto cube plane.

The role of the pineal organ and the suprachiasmatic nucleus in the control of circadian locomotor rhythms in the Java sparrow, Padda oryzivora

Abstract: The roles of the pineal organ and the suprachiasmatic nucleus (SCN) in the control of circadian rhythms of locomotor activity were examined in male Java sparrows (Padda oryzivora). 1. Removal of the pineal organ resulted in (i) no interference with entrainment to a light-dark (LD) cycle with anticipatory activity, (ii) appearance of residual circadian rhythmicity for a while after transfer from an LD cycle to a continuous dim light condition (LL), and (iii) subsequent loss of the circadian locomotor rhythms in prolonged LL (Fig. 1). 2. Birds with bilateral SCN lesions showed diurnal rhythms with anticipatory activity in LD cycles, but did not show any circadian rhythms in LL (Fig. 2). Unilateral lesions of the SCN did not lead to loss of circadian rhythms in LL. The length of the circadian period (τ), however, changed for about a month. 3. Continuous administration of melatonin induced suppression of the circadian activity rhythms and reduced total amount of locomotor activity in LL (Fig. 3).

Pulse arc welding machine

Abstract: A pulse arc welding machine in which the repetition frequency of the pulse currect is unaffected by the frequency of the power source and the mean value of the pulse current applied can be accurately controlled over a broad range while the arcing is maintained stable. A pulse peak current supplying circuit is connected in series with an arcing region formed between a consumable wire electrode and a material to be welded between the output terminals of a standard direct current source while a base current supplying circuit is connected in parallel with the pulse peak current supplying circuit. The pulse peak current supplying circuit and the base current supplying circuit are both composed of a switching element such as a transistor coupled in series with an inductive element. Diodes are provided for suppressing high voltage transients in the circuit.

Silver halide photographic material

Abstract: PURPOSE:To obtain a silver halide photosensitive material having substantial performance to prevent electrostatic charge, good tape adhesiveness and type printability and excellent film strength by forming a specific back coat layer on the surface of a hydrophobic substrate on the side opposite from the surface on which a silver halide photographic constituting layer is provided. CONSTITUTION:The back coat layer of the AgX photographic material having at least one layer of silver halide (AgX) photosensitive layer on one surface of the hydrophobic substrate and provided with the back coat layer on the surface on the side oppositve therefrom is formed by incorporating a) a synthetic binder, b) inorg. antistatic agent, c) compd. having >=2 epoxy groups or ethyleneimino groups in a molecule, d) polyvalent metal, for example, the salt or complex of Cr or Zr and adjusting the pH of a coating liquid for back coating to >=6.0, more preferably >=7.0. Such back coat layer is provided on the AgX photosensitive material, by which the generation of static marks is obviated and the difficultly in handling as a result of sticking to each other in a processing stage or the staining of an installation, etc. are obviated. The disappearance of the type print formed on the rear surface during processing is obviated as well.

Cloning of 3-Isopropylmalate Dehydrogenase Gene of an Extreme Thermophile and Partial Purification of the Gene Product

Abstract: The gene of an extreme thermophile, Thermus thermophilus HB8, which codes for a leucine biosynthetic enzyme, 3-isopropylmalate (3-IPM) dehydrogenase [EC 1.1.1.85], was cloned in Escherichia coli using pBR322 as a vector. E. coli cells carrying this recombinant plasmid, pHB2, produced the thermophilic enzyme 7-fold more than did T. thermophilus HB8 cells. When the crude extract of the pHB2-carrying cells was treated at 70 degrees C for 10 min, approximately 75% of the protein in the extract was precipitated with full activity of the thermophilic 3-IPM dehydrogenase being left in the supernatant, indicating that 4-fold purification was achieved during this process. This shows that the thermophilic 3-IPM dehydrogenase was purified 28-fold by these two procedures, cloning and heat treatment, and demonstrates that the extract from the plasmid-harboring cells is a good starting material for purification of the enzyme. Following the heat treatment, 3-IPM dehydrogenase was further purified by ammonium sulfate precipitation and DEAE-cellulose column chromatography. The enzyme preparation thus obtained contained 3-IPM dehydrogenase as a major component with a few minor impurities as shown by polyacrylamide gel electrophoresis, whereas the enzyme preparation from T. thermophilus HB8 cells obtained by the same procedures showed multiple bands on a polyacrylamide gel electrophoresis.

Container inspection system

Abstract: A package inspection system is used for automatic inspection of a different content or identification of a content in a package such as a container especially a large container in unloading from a ship without opening or unpacking the container and comprises an X-ray transmitter, an X-ray receiver, and a processing unit for image processing.

15 N abundance in Antarctica: origin of soil nitrogen and ecological implications

Abstract: Antarctica offers a unique natural environment from the point of view of nitrogen cycling. Ice-free dry areas,‘Antarctic oases’, and penguin rookeries are of particular interest because of the characteristic distribution of nitrate deposits1–4 and biological materials such as algae and guano. As the distribution of 15N/14N in a geochemical system reflects sources and metabolic pathways of nitrogen5, a study of the nitrogen isotopic composition of Antarctic samples would help us to understand the Antarctic nitrogen cycle. Here we report that nitrate in Antarctic soils is extremely depleted in 15N compared with biogenic nitrogen, and that algae collected from a nitrate-rich saline pond and from a penguin rookery exhibit, respectively, the lowest and the highest 15N/14N ratios among terrestrial biogenic nitrogen so far observed. We also discuss possible causes of these extreme nitrogen isotopic compositions.

Crosslinkable polyethylene resin composition

Abstract: A novel crosslinkable polyethylene resin composition which can be readily crosslinked rapidly is provided. The composition comprises a copolymer consisting essentially of ethylene and a specific unsaturated silane compound having a (meth)acrylate group as a copolymerizable group and a methoxy group as a hydrolyzable group, and an effective amount of a silanol condensation catalyst.

Recovery of Uranium from Seawater

Abstract: Seawater contains various elements in solution. Deuterium, lithium, and uranium are the important ingredients for energy application at present and in the future. This paper deals with the recovery of uranium from seawater, with emphasis on the development of an adsorbent with high selectivity and rate of adsorption for uranium. Polyacrylamidoxime chelating resins were synthesized from various co-polymers of acrylonitrile and cross-linking agents. The resulting resins with the chelating amidoxime group showed selective adsorption for uranium in seawater. The amount of uranium adsorbed from seawater at room temperature reached 3.2 mg/g resin after 180 days. Polyacrylamidoxime fiber, which was prepared from polyacrylo-nitrile fiber and hydroxylamine, showed a high rate of adsorption for uranium. The polyacrylamidoxime fiber conditioned with 1 M HCl and 1 M NaOH adsorbed 4 mg U/g fiber from seawater in ten days.

Slip control system for a clutch

Abstract: A torque transmitting system for transmitting torque from a drive shaft of an engine to an output shaft without transmitting torque variation comprises a friction clutch unit interposed between these shafts, a fluid pressure-operated actuating unit for engaging and disengaging the friction clutch unit, and vibration detecting means detecting vibration occurring in the engine or the torque transmitting system. In the system, means are provided for controlling the pressure of actuating fluid supplied to the fluid pressure-operated actuating unit on the basis of the output signal from the vibration detecting means thereby adjusting the difference between the rotation speed of the drive shaft and that of the output shaft, whereby the torque can be transmitted from the drive shaft to the output shaft without any substantial variation.

Microwave generated plasma light source apparatus

Abstract: A microwave generated plasma light source including a microwave generator, a microwave cavity having a light reflecting member forming at least a portion of the cavity, and a member transparent to light and opaque to microwaves disposed across an opening of the cavity opposite the feeding opening through which the microwave generator is coupled. An electrodeless discharge bulb is disposed at a position in the cavity such that the cavity operates as a resonant cavity at least when the bulb is emitting light. In the bulb is encapsulated at least one discharge light emissive substance. The bulb has a shape and is sufficiently small that the bulb acts substantially as a point light source.

Plasma treating apparatus

Abstract: A plasma treating apparatus includes: an air-core coil for generating a static magnetic field which is axially uniform and a high-frequency waveguide for generating a high-frequency electromagnetic field which is irregular in the axial direction of the air-core coil. A plasma generating glass tube is disposed in the high-frequency waveguide and adapted to be supplied with a gas and a plasma reaction bath held under a vacuum for receiving the plasma flow which is generated axially in the glass tube. A substrate platform is disposed in the reaction bath for supporting a substrate to be treated at a right angle with respect to the plasma flow. There is also included a magnetic field generating coil disposed outside of said reaction bath for shaping the plasma.

Development of automatic cross fractionation: Combination of crystallizability fractionation and molecular weight fractionation

Abstract: An automatic cross-fractionation system is presented by combining a newly developed crystallizability fractionation device based on the principle of isothermal dissolution with a commercially available GPC. The detail design, procedure, and operation variables are described. The fractions eluted from the device are characterized by use of an infrared spectrometer and a differential scanning calorimeter for clearing the mechanism of it. As the result of the study, it is found that the system is very useful for characterizing semicrystalline polymers.

An atlas of α‐bungarotoxin binding sites and structures containing acetylcholinesterase in the mouse central nervous system

Abstract: Alpha-bungarotoxin (α-BGT) has been established as a specific ligand for peripheral nicotinic acetylcholine receptors (nAChRs). To demonstrate the distribution of possible nAChRs in the mouse central nervous system, detailed maps of α-BGT binding sites were made by light microscopic autoradiography. Cryostat sections fixed with 4% paraformaldehyde were incubated with [125I]α-BGT and were processed for autoradiographic visualization of bound radioactivity. Systematic observations of the autoradiographs revealed extensive but uneven distributions of α-BGT binding sites throughout the brain and spinal cord. The highest level of toxin binding occurred in the nucleus (nuc.) dorsalis tegmenti (von Gudden) as well as in the nuc. subthalamicus, nuc. amygdaloideus medialis posterior, nuc. centrum medianum-parafascicularis thalami, nuc. interpeduncularis pars lateralis, nuc. parabigeminalis, colliculus posterior, and nuc. dorsalis nervi vagi. The distribution patterns of acetylcholinesterase (AChE) activity were also mapped histochemically and were correlated to those of α-BGT binding sites. Most of the regions with significant levels of α-BGT binding also showed significant staining reaction of AChE.

Portable acoustic device

Abstract: A portable stereo system includes a body unit having a tape player and a hinge portion and loudspeaker units having matching hinge portions. The player and loudspeakers can be coupled by a hollow hinge shaft which doubles as a battery holder, and the entire flexible assembly can be fastened around the user's waist or slung across his shoulder by a belt which is detachably fastened to at least the loudspeaker units. If desired, the loudspeakers can be omitted and the belt coupled directly to the hinge shafts.

Oxygen and carbon dioxide absorbent and process for storing coffee by using the same

Abstract: An oxygen and carbon dioxide absorbent comprising (A) a particulate substance wherein the particles of a hydrous alkali substance are covered with separator particles, (B) iron powder and (C) an electrolyte and a process for storing coffee by using the same is disclosed

Itaconic acid fermentation by a yeast belonging to the genus Candida.

Abstract: Many yeasts were isolated from natural sources in the tropics and subtropics by enrichment culture technique, using medium which contained a surfactant. The medium was acidified with citric acid. A strain S–10 belonging to the genus Candida was found to produce itaconic acid. Under suitable conditions in shake culture, a mutant derived from this strain produced the acid at about 35 % yield on the basis of glucose supplied.

Electrode for living bodies

Abstract: An electrode for living bodies consisting of a fine metal wire at least part of the surface of which is directly coated with a porous membrane having fine pores of an average pore diameter of greater than 0.01 μm. The electrode makes it possible to measure the oxygen concentration in the blood vessels and in the living tissues with increased stability and improved response characteristics. Particularly good results are obtained when the porous membrane is a non-homogeneous structure using a cellulose acetate.

Heat storage material

Abstract: A heat storage material comprises NaCH 3 COO3H 2 O as a main component and a nucleating agent comprising 95 to 10 wt % of anhydrous sodium acetate and 5 to 90 wt % of at least one of the other sodium salts selected from the group consisting of Na 3 PO 4 , Na 2 HPO 4 , NaH 2 PO 4 , NaNH 4 PO 4 4H 2 O, Na 5 P 3 O 10 , C 6 H 5 Na 2 PO 4 2H 2 O, NaBO 2 2H 2 O, Na 2 B 4 O 7 10H 2 O, Na 2 C 2 O 4 , NaBr, NaCl, CH 2 (COONa) 2 H 2 O, (CHCOONa) 2 H 2 O, (CH 2 COONa) 2 6H 2 O, HOC(CH 2 ) 2 (COONa) 2 2H 2 O, CH 3 (CH 2 ) 2 COONa, CH 3 (CH 2 ) 6 COONa, HOOCCH(NH 2 )(CH 2 ) 2 COONaH 2 O sodium oleate, and sodium stearate

Torque transmission device

Abstract: A torque transmission device for eliminating the transmission of tortional vibration from a driving shaft to a driven shaft comprises a clutch capable of controlled slippage so that the speed of rotation of the driven shaft is lower than the speed of the driving shaft. Slippage of the clutch is controlled by sensing the speed of rotation and the fluctuation of the speed of rotating of the driving shaft and the speed of rotation of the driven shaft and regulating slippage so that the difference in rotation speed between the two shafts is greater than the fluctuation in rotation speed of the driving shaft. The clutch may be an electromagnetic clutch of which the exciting current is controlled or a friction clutch actuated by controlled hydraulic pressure. The clutch may be in parallel with a fluid coupling.

Biochemical process for purifying contaminated water

Abstract: A process for treating contaminated water containing BOD sources and nitrogen sources, which comprises supplying oxygen or oxygen-containing gas from one side of a gas-permeable membrane to grow microorganisms including aerobic bacteria and anaerobic bacteria on the other side of the gas-permeable membrane, and performing decomposition of the BOD sources and nitrification and denitrification simultaneously by the action of these microorganisms. Especially good results are obtained when a membrane composed of porous hollow fibers is used as the gas-permeable membrane.

Oxygen absorbent-containing bag and container sealing member having the same

Abstract: A bag in which an oxygen absorbent is sealed, is characterized in that at least part of the material constituting the bag is composed of a film having a plurality of fine openings, and being gas-permeable, but water-impermeable at one atmospheric pressure, and a container sealing member in which the bag is in a space inside the member are disclosed. The bag is used for preserving an aqueous liquid or semi-liquid material, such as foodstuffs and other materials.