Abstract: In a pretreatment instrument and a pretreatment method of saliva, used for identification and quantitation of Streptococcus mutans in saliva by the immunochromatographic method utilizing an antigen-antibody reaction, the instrument includes a swab and a mixing container for saliva and a treatment liquid, the swab having a stick and a soft synthetic resin-made sponge capable of absorbing a predetermined amount or more of saliva, and the mixing container being made of a transparent or translucent soft synthetic resin and comprising a bag-like portion formed integrally with and continuously to a constricted portion as the end of a tapering introduction portion having an opening thoroughly larger than the sponge, wherein the constricted portion and the bag-like portion have elasticity such that the sponge can be squashed by a finger pressure in a state that the sponge is inserted therein; the constricted portion has a width such that a pressure can be applied by fingers and has a shape such that when the sponge i

Abstract: To provide an examination method of buffer capacity of saliva and an examination instrument of buffer capacity of saliva, by which the buffer capacity of saliva of a subject can be examined simply without being influenced by an amount of saliva and preciously without being influenced by the subjectivity of an examiner, an end portion of an absorptive material in a predetermined shape, containing a pH indicator at least having one or more color transition range of pH 4.0 to 7.0 and an acid, is dipped in saliva to allow the saliva to penetrate into the absorptive material, and a buffer capacity of the saliva is examined from a distance where a color to be exhibited by the pH indicator has changed by the penetrated saliva from a predetermined place of the absorptive material and a distance where the saliva has penetrated from a predetermined place of the absorptive material.

Abstract: Polymerized liposomes, methods of preparing the polymerized liposomes and incorporating biologically active substances within the polymerized liposomes, and methods of administering polymerized liposomes containing a biologically active substance to be delivered to a patient are disclosed. The polymerized liposomes are prepared by polymerizing double bond-containing liposomes. The polymerization can be initiated with a source of radiation and/or a free radical initiator. Biologically active substances can be incorporated into both the hydrophilic and hydrophobic layers of the liposomes, either during or after polymerization. The polymerized liposomes can be administered orally to a patient in need of the biologically active substance to be delivered. Examples demonstrate enhanced stability.

Abstract: An endless toner transport which connects a developing device with a cleaning device is disposed so as to pass through these devices in their respective longitudinal directions. The mixing of toner can be enhanced by returning recovered toner to the developing device and by supplying fresh toner to the cleaning device by using the toner transport itself, whereby the reuse of recovered toner and the reduction of the quantity of fresh toner used can be conducted more effectively. In the processes of transporting toner from the developing device to the cleaning device and from the cleaning device to the developing device, toner can effectively be stirred and mixed by utilizing oscillation or the like generated in the endless toner transport which can be in the form of a coil spring so that an additional stirring member is not required, thereby allowing the developing device, and hence the entire image forming apparatus, to be greatly reduced in size.

Abstract: The denture base relining resin comprises a powder component that is a methacrylate ester polymer powder with benzoyl peroxide added thereto and a liquid component that comprises a combination of methyl methacrylate, a methacrylate and a monomer having a specific structure with at least one compound selected from 4-dimethylaminobenzoate and 4,4'-dimethylaminobenzophenone, a specific tertiary amine and a polymerization inhibitor, all incorporated in said liquid component at specific ratios.

Abstract: A photocuring denture base lining material is disclosed, comprising:a powder component comprising a methacrylic acid ester polymer powder and/or a methacrylic acid ester polymer powder having from 0.01 to 5% by weight of a photocuring catalyst compounded therewith; anda liquid component comprising (a) from 10 to 40% by weight of benzyl methacrylate, (b) from 20 to 40% by weight of at least one of compounds represented by the following structural formula (1): ##STR1## wherein R represents an alkyl group, (c) from 20 to 70% by weight of at least one of methacrylic acid esters having two or three methacryloyl groups in one molecule, and (d) from 0.01 to 5% by weight of a photocuring catalyst. The photocuring denture base lining material of the invention is extremely low in the unpleasant odors and irritation, is superior in the fitness and the operability, and has a high surface hardness after curing.

Abstract: An endless toner transport which connects a developing device with a cleaning device is disposed so as to pass through these devices in their respective longitudinal directions. The mixing of toner can be enhanced by returning recovered toner to the developing device and by supplying fresh toner to the cleaning device by using the toner transport itself, whereby the reuse of recovered toner and the reduction of the quantity of fresh toner used can be conducted more effectively. In the processes of transporting toner from the developing device to the cleaning device and from the cleaning device to the developing device, toner can effectively be stirred and mixed by utilizing oscillation or the like generated in the endless toner transport which can be in the form of a coil spring so that an additional stirring member is not required, thereby allowing the developing device, and hence the entire image forming apparatus, to be greatly reduced in size.

Abstract: A denture base separating material is disclosed, comprising an aqueous emulsion obtained by emulsion polymerization of methacrylic ester, acrylic ester, or acrylonitrile alone, or a mixed solution of two or more thereof, in the presence of a water-soluble radical polymerization initiator and a surfactant, the monomer composition of which is adjusted such that the minimum film-forming temperature is 23.degree. C. or lower having an appropriate adhesion and being able to be readily removed from the tissue conditioner, being easily confirmed at the time of application, being from dry spots and cracks on the denture surface, and not generating malodors.

Abstract: A denture base lining material to be used upon mixing a liquid component and a powder component is disclosed, characterized in that the liquid component comprises a phthalic ester-based plasticizer and containing from 5 to 15% by weight of ethyl alcohol and from 5 to 20% by weight of a liquid paraffin or squalane alone or a mixed solution thereof, and the powder component comprises a powder comprising any one of the following powders (a), (b), or (c), or a mixture of two or more thereof: (a) an ethyl methacrylate polymer powder containing from 1 to 5% by weight of a phthalic ester-based plasticizer; (b) a copolymer powder represented by the following formula: ##STR1## wherein n/(m+n) is from 0.15 to 0.55, and containing from 0.5 to 2% by weight of a phthalic ester-based plasticizer; and (c) a mixed powder comprising a polyethyl methacrylate powder having a copolymer powder represented by the following formula mixed therewith: ##STR2## wherein n/(m+n) is from 0.45 to 0.76.

Abstract: A compound having a carbodiimide in its molecule is incorporated in a dental adhesive composition. With this composition, dental composite material can be firmly bonded to the enamel and dentin of a tooth, thereby avoiding formation of a gap which may otherwise cause secondary caries.

Abstract: In a method of preparing a diffused silicon device substrate for use in the fabrication of a MOS power device, a drive-in diffusion step is followed by a thermal donor formation heat treatment which is achieved by heating the silicon device substrate at a temperature from 400.degree. to 500.degree. C. for 1 to 20 hours and in a gas atmosphere containing oxygen gas, and subsequently a thermal donor formation retarding heat treatment is performed by heating the silicon device substrate at a temperature of from 600.degree. to 700.degree. C. for 8 to 24 hours in a gas atmosphere containing oxygen gas.

Abstract: The present invention relates to an improvement in a method and an apparatus for magnetic levitation of a linear slider through a PI control action. When the slider is horizontally moved while levitated vertically by two fixed magnetic forces, the angle of inclination of the slider cannot be settled in a preset position because of a control delay caused by integral action, which results in an angle offset. In order to eliminate the offset, a signal which is the sum of an angle deviation and a delay compensation signal that is proportional to the product of the velocity of the slider and an integral time is used as an error signal to settle the angle of inclination. The vertical position of the slider is controlled so that the sum of the magnetic forces applied to the slider balances the weight of the slider.

Abstract: An ink-on-demand type ink jet printer includes a printer head having at least one nozzle, pressure chamber and means for pressurizing an ink in the pressure chamber so as to effect ejection of an ink droplet from a nozzle to effect printing during a printing operation. The printer further includes a pump for pressurizing an ink in the printer head and a pump driver for driving the pump continuously for a predetermined period of time after the printing operation has ceased during which a small amount of ink is partially ejected from the nozzle. A nozzle cover is provided for selectively covering the nozzle, with the nozzle cover moving to cover the nozzle during the predetermined period of time when the pump driving means is operating while ink is partially ejected from the nozzle to prevent ink clogging during a no-print condition after the printing operation has ceased.

Abstract: An ink-on-demand type ink jet printer including a printer head and an ink container. The printer head includes nozzles for ejecting ink droplets, pressure chambers for pressurizing ink therein and ink passageways for supplying ink from the ink container to the pressure chambers. The printer head is movable in a linear direction for printing across a sheet of recording paper. The ink container includes a vertical partition with the vertical partition having a wall disposed adjacent to an outlet of the ink container and extending substantially perpendicularly to the direction of movement of the printer head. The ink container includes an interior divided by the vertical partition into a main chamber of a first volume defined between one wall surface of the vertical partition and a wall surface of the ink container and an auxiliary chamber of smaller volume defined between the opposite wall surface of the vertical partition and another wall surface of the ink container.

Abstract: An ink-on-demand type ink jet printer having a printer head. The printer head includes a substrate having a substantially planar surface and an opposing substantially planar surface and a vibratory plate having a cooperating substantially planar surface. The planar surfaces cooperate to define at least one nozzle, pressure chamber and ink supply passage therebetween. An ink container is integrally joined to the printer head with the ink container having a vent hole in an upper portion thereof. Separate means are provided for pressurizing the ink in the pressure chamber and for preventing air bubbles from entering the ink supply passage. The opposing substantially planar surfaces of the substrate define a wall of the ink container.

Abstract: An ink-on-demand type ink jet printer includes an ink jet head assembly having a printer head and an ink container integrally joined to the printer head. The printer head includes a pressure chamber and ink supply and ejection flow passages communicating respectively therewith. The ink container includes therein a narrow air-bubble blocking tube opening directly into a lower portion of the interior of the ink container and which connects the ink supply flow passage to the ink container. A vent hole is defined in an upper portion of the ink container. The ink container includes a wall surface with the wall surface not trapping air bubbles, with a surface of the vent hole being coated with a defoaming agent.

Abstract: An ink jet printer head for printing dots on demand on a recording medium has ink flow paths formed in a substrate. The ink paths include a pressure chamber, supply path and nozzle for discharging ink droplets, the nozzle terminating in an external front face of the printer head. A piezoelectric element acting on the pressure chamber to reduce chamber volume, causes an ink droplet to be ejected. Ink flow in the paths is perpendicular to the displacement of the piezoelectric element. The front face of the printer head is adapted to contour the ink layer which forms on the front face at rapid printing rates to assure that the droplets are ejected along a line which is a linear, parallel extension of the longitudinal nozzle axis. The design principles are applicable to printer heads having single or double rows of nozzles.

Abstract: A head for an ink-on-demand jet dot printer is highly integrated to provide a large plurality of closely spaced dots by combining more than one head of lesser dot density as components of a single unit. The dots from the separate component heads are interspaced on the print recording medium to provide characters of high quality. Commonality of elements provides for a miniaturized head. In another embodiment independent pressure chambers, channels and nozzles are formed on opposite sides of a common baseplate.