Abstract: A polyimide precursor for producing a flexible electronic device substrate that provides a polyimide with reduced charge-up, particularly a polyimide in the form of a film. When a polyimide film having a thickness of 10 ?m is formed using the polyimide precursor, and a pair of electrodes is formed with a distance d on the polyimide film, and when the polyimide film is irradiated with a laser beam while applying a DC voltage with an electric field strength of 0.1 to 10 V/?m between the pair of electrodes; two SHG lights are observed between the pair of electrodes and satisfy a symmetry ratio of 0.5 or more. The symmetry ratio (LR ratio)=Ismall/Ilarge, wherein, Ilarge represents the peak intensity of the SHG light with the larger intensity, and Ismall represents the peak intensity of the SHG light with the smaller intensity.

Abstract: A polyimide precursor for a display substrate capable of forming a polyimide film for a display substrate having a charge half-life of 48 seconds or more and/or a charge decay ratio after 120 seconds of 63% or less in measurement of the charge half-life in accordance with JIS L 1094A.

Abstract: A polyimide precursor for a display substrate capable of forming a polyimide film for a display substrate having a charge half-life of 48 seconds or more and/or a charge decay ratio after 120 seconds of 63% or less in measurement of the charge half-life in accordance with JIS L 1094A.

Abstract: A polyimide binder from which a high-capacity power storage device, which has a small irreversible capacity and a high initial charge/discharge efficiency and is lightweight, can be obtained. The polyimide binder precursor composition is a polyimide binder precursor composition for a power storage device electrode, and includes a reaction product of a tetracarboxylic acid component and a diamine component, and a solvent. The polyimide binder obtained from the polyimide binder precursor composition has an irreversible capacity of 1200 mAh/g or less.

Abstract: A binder resin for electrodes consisting of a polyimide-based resin having a melting point of 300° C. or lower, an electrode mixture paste including the binder resin for electrodes, an electrode active material, and a solvent; and an electrode including an electrode mixture layer including the binder resin for electrodes and an electrode active material; and a method for producing the electrode.

Abstract: A binder resin for electrodes consisting of a polyimide-based resin having a melting point of 300° C. or lower, an electrode mixture paste including the binder resin for electrodes, an electrode active material, and a solvent; and an electrode including an electrode mixture layer including the binder resin for electrodes and an electrode active material; and a method for producing the electrode.

Abstract: Disclosed is a method for producing a polyimide laminate, the method including the steps of applying a polyimide precursor solution onto a substrate and heating the polyimide precursor solution, to thereby form a polyimide film layer on the substrate. The substrate is any plate selected from a glass plate, a metal plate, and a ceramic plate. The heating step includes irradiation with far infrared rays using an infrared heater that generates a maximum radiant energy at an infrared wavelength of 3.5 to 6 ?m. The highest heating temperature is preferably 350 to 550° C. The time required to increase the temperature from 180 to 280° C. during a temperature-increasing process is preferably 2 minutes or longer.

Abstract: A method for producing a polyimide film includes: (i) applying a polyamic acid solution composition, which includes at least one of the following solvents: N-methylformamide, N,N-dimethylpropionamide, N,N-dimethylisobutylamide and tetramethylurea, and a polyamic acid, to a substrate; and then (ii) imidizing the polyamic acid by subjecting the composition to heat treatment, to obtain the polyimide film.

Abstract: A plate body 2, multiple hologram layers 3 are provided in the thickness direction of the plate body 2, and at least one of the multiple hologram layers 3 is formed of spirally continuous hologram bands 4. Erasure areas 4A and 4B and non-erasure areas 4C and 4D of the hologram band 4 are provided in the length direction of the hologram band 4. Non-erasure areas 4E and 4F of the hologram band 4 are formed on both sides in the direction orthogonal to the length direction of the hologram band 4 in the erasure areas 4A and 4B.

Abstract: The recording and reproducing apparatus has rotary drive unit (a motor) that rotationally drives a multilayer recordable recording medium 1; a reference-light-side recording and reproducing lens 6 and a recording-light-side recording and reproducing lens 7 that are disposed oppositely to the recording medium 1 which is rotationally driven by the rotary drive unit, an address detection lens 5 that is disposed opposite the recording medium 1 and that is provided separately from the recording and reproducing lenses 6 and 7; a light source 9 for recording and reproducing purpose that supplies recording reproduction light to the recording and reproducing lenses 6 and 7; and the address light source 9 that supplies address light to the address detection lens 5. The apparatus is configured in such a way that light whose center axis portion is optically hollow is supplied from the reference-light-side recording and reproducing lens 6 to the recording medium 1 during reproducing operation.

Abstract: Then, in order to achieve the above-described object, in the optical disk of the present invention, while micro-hologram layers 7 and 8 made of plural layers are provided in an inner portion of a plate body 2 along a thickness direction of the plate body 2, dimensions of micro-holograms 4 along the thickness direction of the plate body 2, which configure the micro-hologram layer 7 formed on the side of one surface of the plate body 2 within the micro-hologram layers 7 and 8 constructed of the plural layers, are made smaller than dimensions of micro-holograms 3 along the thickness direction of the plate body 2, which configure a micro-hologram layer 8 formed on the side of an inner layer of the plate body 2.

Abstract: A holographic recording apparatus causes reference light and information light to interfere with each other, and records the interference pattern in a recording medium. The holographic recording apparatus has an objective lens and a focus position controller. The objective lens focuses both the reference light and the information light at a focus position of the recording medium. The focus position controller changes the focus position into a predetermined position on the light path of the reference light.

Abstract: A plate body 2, multiple hologram layers 3 are provided in the thickness direction of the plate body 2, and at least one of the multiple hologram layers 3 is formed of spirally continuous hologram bands 4. Erasure areas 4A and 4B and non-erasure areas 4C and 4D of the hologram band 4 are provided in the length direction of the hologram band 4. Non-erasure areas 4E and 4F of the hologram band 4 are formed on both sides in the direction orthogonal to the length direction of the hologram band 4 in the erasure areas 4A and 4B.

Abstract: To accomplish the object, the invention provides a record medium including a plate body 2; multiple hologram layers 3 formed in the thickness direction of the plate body 2; and hologram bands 4 formed in at least one of the multiple hologram layers 3. The hologram band 4 is formed with erasure areas 4A and 4B of the hologram band 4 with no hologram band 4 in the direction orthogonal to the length direction of the hologram band 4.

Abstract: Then, in order to achieve the above-described object, in the optical disk of the present invention, while micro-hologram layers 7 and 8 made of plural layers are provided in an inner portion of a plate body 2 along a thickness direction of the plate body 2, dimensions of micro-holograms 4 along the thickness direction of the plate body 2, which configure the micro-hologram layer 7 formed on the side of one surface of the plate body 2 within the micro-hologram layers 7 and 8 constructed of the plural layers, are made smaller than dimensions of micro-holograms 3 along the thickness direction of the plate body 2, which configure a micro-hologram layer 8 formed on the side of an inner layer of the plate body 2.

Abstract: The recording and reproducing apparatus has rotary drive unit (a motor) that rotationally drives a multilayer recordable recording medium 1; a reference-light-side recording and reproducing lens 6 and a recording-light-side recording and reproducing lens 7 that are disposed oppositely to the recording medium 1 which is rotationally driven by the rotary drive unit, an address detection lens 5 that is disposed opposite the recording medium 1 and that is provided separately from the recording and reproducing lenses 6 and 7; a light source 9 for recording and reproducing purpose that supplies recording reproduction light to the recording and reproducing lenses 6 and 7; and the address light source 9 that supplies address light to the address detection lens 5. The apparatus is configured in such a way that light whose center axis portion is optically hollow is supplied from the reference-light-side recording and reproducing lens 6 to the recording medium 1 during reproducing operation.

Abstract: A holographic recording apparatus causes reference light and information light to interfere with each other, and records the interference pattern in a recording medium. The holographic recording apparatus has an objective lens and a focus position controller. The objective lens focuses both the reference light and the information light at a focus position of the recording medium. The focus position controller changes the focus position into a predetermined position on the light path of the reference light.

Abstract: (S)-cyanohydrins are produced by asymmetric addition of hydrogen cyanide to aldehydes in the presence of a catalyst of cyclo-[(S)-leucyl-(S)-histidyl].

Abstract: This invention is a water-soluble high molecular polymerized drug comprising a water-soluble clock copolymer having a hydrophilic segment and a hydrophobic pharmacological-functioning segment to side chain of which a drug is bonded.The hydrophilic first segments of the present invention include polyethylene glycol, polysaccharides, polyacrylamide, and so on.The hydrophobic segments being attached to a drug include polyaspartic acid, polyglutamic acid, polylysine, or derivatives thereof.Drugs to be attached to the hydrophobic segment include anti-cancer drugs, drugs for central nerve, drugs for circulatory organs, and so on.

Abstract: Disclosed are a lactone polymer, a carbonate polymer, a lactone-carbonate random or block copolymer which are mono-dispersed, that is, which have a molecular weight distribution of nearly 1, or, in which purity of a polymer component having a unitary structure is very high, and processes for the preparation thereof which comprise a ring-opening addition reaction of a lactone monomer and/or a cyclic carbonate monomer with a ring-opening initiator in the presence of an organic aluminum-based Lewis acid represented by general formula (I), ##STR1## wherein R is an alkyl group having a carbon number ranging from 1 to 4, Y is independently selected from a substituted group, and p is any one of 1, 2 and 3.