Abstract: [Problem] The purpose of the present invention is to provide organic particles containing pharmaceutical particles of which the particles are small and the particle size distribution is narrow, and a manufacturing method for the same. [Solution] Provided are pharmaceutical multimeric particles of which the particles are small and the particle size distribution is narrow and which are characterized in being obtained by pouring into water a solution of a pharmaceutical multimer dissolved in a water-miscible organic solvent, and a manufacturing method for the pharmaceutical multimeric particles. Pharmaceutical dimeric particles thereof are characterized in being obtained by pouring into water a solution of a compound represented by general formula (I) dissolved in a water-miscible organic solvent.

Abstract: A method for fabricating metal-coated organic crystal wherein a reaction of an organic crystal with transition metal salt in alkaline aqueous solution under visible light irradiation, wherein, when energy at the top of valence band of the organic crystal is defined as A (eV) and energy at the bottom of conduction band of the organic crystal is defined as B (eV), redox potential C (V) of transition metal ion or transition metal complex ion, when said transition metal salt is dissolved in the alkaline aqueous solution, these three parameters should satisfy the following relation (1): ?A?4.5?C??B?4.5.

Abstract: In a method for manufacturing an optical fiber probe in which an optical fiber is formed as an optical fiber probe by etching a tip section and sharpening a core region of the optical fiber, the optical fiber is a polarization maintaining optical fiber including the core region, a stress-applying region, and a clad region. The optical fiber probe is formed by mechanical-grinding of the edge of the optical fiber into a sharpened shape so that the core region is located at the tip of a sharpened portion, and by dipping the formed edge of the optical fiber in an etchant for further sharpening the core region. Accordingly, a new optical fiber probe both with high transmission efficiency and with a large polarization degree is obtained.

Abstract: A method for fabricating metal-coated organic crystal wherein a reaction of an organic crystal with transition metal salt in alkaline aqueous solution under visible light irradiation, wherein, when energy at the top of valence band of the organic crystal is defined as A (eV) and energy at the bottom of conduction band of the organic crystal is defined as B (eV), redox potential C (V) of transition metal ion or transition metal complex ion, when said transition metal salt is dissolved in the alkaline aqueous solution, these three parameters should satisfy the following relation (1): ?A?4.5?C??B?4.

Abstract: The present invention relates to a method of preparing solid particulates and solid particulates prepared by using the method. The method of preparing solid particulates includes dissolving an organic or inorganic compound in a first solvent to provide an organic or inorganic compound-included solution, dispersing the organic or inorganic compound-included solution in a second solvent to provide an emulsion, and concentrating the emulsion in a dispersing medium to precipitate the organic or inorganic compound as solid particulates to provide a dispersion including the solid particulates. The first solvent is an organic solvent or an aqueous solvent, and the second solvent is an organic solvent or an aqueous solvent that is not compatible with the first solvent.

Abstract: A method for preparation of inorganic fine particle-organic crystal hybrid fine particle comprising; pouring an organic material having ?-conjugated bond as a water soluble solution into aqueous dispersion in which inorganic fine particles of 50 nm or less selected from the compound group consisting of metal fine particles, semi-conductor fine particles, fine particles of inorganic fluorescent material and fine particle of inorganic luminescent material, are dispersed, co-precipitating said inorganic fine particle which forms a core into said organic material which forms a shell in said dispersion and forming shell of fine crystal of said organic material on the surface of the core of said inorganic fine particles of 50 nm or less by controlling the size of said inorganic fine particle and by controlling the adding amount of said organic material.

Abstract: In a method for manufacturing an optical fiber probe in which an optical fiber is formed as an optical fiber probe by etching a tip section and sharpening a core region of the optical fiber, the optical fiber is a polarization maintaining optical fiber including the core region, a stress-applying region, and a clad region. The optical fiber probe is formed by mechanical-grinding of the edge of the optical fiber into a sharpened shape so that the core region is located at the tip of a sharpened portion, and by dipping the formed edge of the optical fiber in an etchant for further sharpening the core region. Accordingly, a new optical fiber probe both with high transmission efficiency and with a large polarization degree is obtained.

Abstract: In a method for manufacturing an optical fiber probe in which an optical fiber is formed as an optical fiber probe by etching a tip section and sharpening a core region of the optical fiber, the optical fiber is a polarization maintaining optical fiber including the core region, a stress-applying region, and a clad region. The optical fiber probe is formed by mechanical-grinding of the edge of the optical fiber into a sharpened shape so that the core region is located at the tip of a sharpened portion, and by dipping the formed edge of the optical fiber in an etchant for further sharpening the core region. Accordingly, a new optical fiber probe both with a high transmission efficiency and with a large polarization degree is obtained.

Abstract: The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.

Abstract: The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.

Abstract: A method for preparation of porous polyimide microparticles comprising, forming polyamide acid microparticles by pouring polymer solution prepared by dissolving polyamide acid containing 0.5 to 80 weight % of alkali metal salt to polyamide acid by 0.1 to 15 weight % concentration into a poor solvent selected from the group consisting of aliphatic solvents, alicyclic solvents, aromatic solvents, CS2 and mixture of two or more these solvents and the temperature of which is adjusted to the range from ?20° C. to 60° C., wherein particle size of said polyamide acid microparticles is adjusted to 50 nm to 10000 nm by controlling the temperature of said poor solvent, pore size of said polyamide acid microparticles is adjusted to the range from 20 nm to 500 nm and porosity of said polyamide acid microparticles is adjusted to the range from 0.

Abstract: In a method for manufacturing an optical fiber probe in which an optical fiber is formed as an optical fiber probe by etching a tip section and sharpening a core region of the optical fiber, the optical fiber is a polarization maintaining optical fiber comprising the core region, a stress-applying region, and a clad region, and the optical fiber probe is formed by mechanical-grinding of the edge of the optical fiber into a sharpened shape so that the core region is located at the tip of a sharpened portion, and by dipping the formed edge of the optical fiber in an etchant for further sharpening the core region. Accordingly, a new optical fiber probe both with a high transmission efficiency and with a large polarization degree is obtained.

Abstract: A method for preparation of inorganic fine particle-organic crystal hybrid fine particle comprising; pouring an organic material having &pgr;-conjugated bond as a water soluble solution into aqueous dispersion in which inorganic fine particles of 50 nm or less selected from the compound group consisting of metal fine particles, semi-conductor fine particles, fine particles of inorganic fluorescent material and fine particle of inorganic luminescent material, are dispersed, co-precipitating said inorganic fine particle which forms a core into said organic material which forms a shell in said dispersion and forming shell of fine crystal of said organic material on the surface of the core of said inorganic fine particles of 50 nm or less by controlling the size of said inorganic fine particle and by controlling the adding amount of said organic material.

Abstract: Polyester-polysiloxane block copolymers for dental uses are disclosed as low modulus thermoplastic elastomers. The copolymers comprise polycaprolactone residues and poly(dimethylsiloxane) .alpha.,.omega.-diol residues which are linked by ether bonds. The compounds exhibit the property of plasticity by heating and the property of original rubber elasticity by cooling again to room temperature.