Abstract: Provided is a particle having a large photoacoustic signal per unit dye, the particle including: one of a hydrophobic metal naphthalocyanine dye and a hydrophobic metal phthalocyanine dye; one of an oil, a fatty acid, and a fatty acid ester as a matrix material; and a surfactant, in which a ratio of the weight of the matrix material to the weight of the particle is 50% or more.

Abstract: To provide a particle promoting hydrophobic metal phthalocyanine aggregation, having absorption in a wavelength region suitable for a photoacoustic imaging method and having a high molar absorbance coefficient per particle by increasing the weight percentage of the dye in the particle. The particle of the present invention is a particle having a hydrophobic metal phthalocyanine and a surfactant, wherein the weight percentage of the hydrophobic metal phthalocyanine is 6% or more.

Abstract: A conventional silicon naphthalocyanine-containing liposome is required to incorporate a dye dispersed therein for use in photodynamic therapy, and is thus low in dye content and also low in photoacoustic signal. According to a lipid particle containing a silicon naphthalocyanine analog, in which the ratio A/B of an absorption coefficient A at a first absorption local maximum to an absorption coefficient B at a second absorption local maximum in a range from 700 nm to 800 nm is 5.0 or less, the dye content in the lipid particle can be increased and the photoacoustic signal intensity can be improved.

Abstract: There is provided a gelatin-ICG complex that can suppress leakage of ICG included therein. The complex has a gelatin derivative including at least one of a phospholipid covalently bonded to a gelatin or a cholesterol covalently bonded to a gelatin, and indocyanine green.

Abstract: There is provided a gelatin-ICG complex that can suppress leakage of ICG included therein. The complex has a gelatin derivative including at least one of a phospholipid covalently bonded to a gelatin or a cholesterol covalently bonded to a gelatin, and indocyanine green.

Abstract: A method of detecting a contrast agent for photoacoustic imaging provides a high signal intensity. In a contrast agent for photoacoustic imaging, each particle containing an inorganic material supports at least an organic dye having an absorption coefficient in the near infrared region by means of chemical bonding.

Abstract: An iron oxide particle constituting a Resovist (trademark) absorbs a small quantity of light in a near infrared region and emits a weak photoacoustic signal. According to a particle having a catechol-like compound and iron atoms, the particle having a ratio of the number of moles of the catechol-like compound to the number of moles of the iron atoms of 270/10,000 or more, light absorption in the near infrared region increases and a strong photoacoustic signal can be transmitted.

Abstract: An object of the present invention is to increase the dye content in nanoparticles and to improve the signal intensity per particle.

Abstract: There is provided an ICG-loaded polymer nanoparticle that is dynamically stable, prevents the leakage of contained ICG and the resulting discoloration, and has a high molar absorbance coefficient. The particle contains a hydrophilic dye having a sulfonate group and a hydrophobic polymer, and the particle further contains at least one of a lipid having a positively charged region, a nicotinic acid derivative and a thiamine derivative.

Abstract: There is provided a gelatin-ICG complex that can suppress leakage of ICG included therein. The complex has a gelatin derivative including at least one of a phospholipid covalently bonded to a gelatin or a cholesterol covalently bonded to a gelatin, and indocyanine green.

Abstract: A composition including a hydrophilic dye having a sulfonate group and a hydrophobic solvent, wherein the composition includes at least one of a nicotinic acid derivative and a tiamine derivative, can form densely accumulated particles and the like since the composition includes a hydrophilic dye that is likely to dissolve in a hydrophobic solvent.

Abstract: A contrast agent for optical imaging is produced by preparing a composition containing a hydrophilic dye having a sulfonate group, a hydrophobic solvent, a lipid having a positively charged site, and a polymerizable monomer or a prepolymer, dispersing the composition into water, and polymerizing the polymerizable monomer or the prepolymer.

Abstract: There is provided an organic electroluminescence type two-dimensional color image display panel includes multiple arrayed pixels, the pixels being each formed by arranging organic EL devices having at least red, green, and blue luminescent colors in a certain order, in which each of the organic EL devices has a pair of two parallel sides in a planar shape, the organic EL devices having luminescent colors different from each other are adjacent to each other at the two parallel sides, and the organic EL devices having the same luminescent color are adjacent to each other in a parallel line direction of the two parallel sides, and are arrayed to be of shape of stripes arranged parallel to each other while being slanted with respect to a vertical line.

Abstract: A treatment solution that is used to form a chemical coating of trivalent chromium free of hexavalent chromium having uniform black appearance and good corrosion resistance on the surface of zinc or zinc alloy and that attains prolongation of treatment bath lifetime; and a method of forming a black trivalent chromium chemical coating on the surface of zinc or zinc alloy. There is provided a treatment solution for forming of a black trivalent chromium chemical coating on zinc or zinc alloy, comprising trivalent chromium ions, a chelating agent capable of forming a water-soluble complex with trivalent chromium, zinc ions, a sulfur compound and phosphite ions.

Abstract: A method of detecting a contrast agent for photoacoustic imaging provides a high signal intensity. In a contrast agent for photoacoustic imaging, each particle containing an inorganic material supports at least an organic dye having an absorption coefficient in the near infrared region by means of chemical bonding.

Abstract: An image display panel of the reflection type includes, in a multilayer structure, a first layer including a periodic planar arrangement of a plurality of electrophoretic elements, each showing one of an opaque black state and a transparent state in response to an input signal, and a second layer including a periodic planar arrangement of a plurality of electrophoretic elements, each showing at least a first color state and a second color state in response to an input signal. An arrangement period of the electrophoretic elements included in the first layer is smaller than an arrangement period of the electrophoretic elements included in the second layer.

Abstract: A chromium-free treating liquid and treatment methods which are for imparting to a zinc or zinc alloy deposit a coating film which is highly corrosion-resistant, has a uniform appearance free from sag stains/puddle stains, has no failure concerning thickness unevenness, and has satisfactory adhesion. The surface-treating aqueous solution, which is for forming a corrosion-resistant coating film over a zinc or zinc alloy deposit, is characterized by comprising (a) an alkali metal silicate (M2O.nSiO2 (wherein M represents an alkali metal and n indicates SiO2/M2O molar ratio)), (b) a water-soluble or water-dispersible silane coupling agent, and (c) a water-soluble or water-dispersible glycidyl ether compound. One of the surface treatment methods for forming a highly corrosion-resistant coating film over a zinc or zinc alloy deposit includes bringing the surface of the zinc or zinc alloy deposit into contact with the surface-treating aqueous solution.

Abstract: A treatment solution that is used to form a chemical coating of trivalent chromium free of hexavalent chromium having uniform black appearance and good corrosion resistance on the surface of zinc or zinc alloy and that attains prolongation of treatment bath lifetime; and a method of forming a black trivalent chromium chemical coating on the surface of zinc or zinc alloy. There is provided a treatment solution for forming of a black trivalent chromium chemical coating on zinc or zinc alloy, comprising trivalent chromium ions, a chelating agent capable of forming a water-soluble complex with trivalent chromium, zinc ions, a sulfur compound and phosphite ions.

Abstract: There is provided an organic electroluminescence type two-dimensional color image display panel includes multiple arrayed pixels, the pixels being each formed by arranging organic EL devices having at least red, green, and blue luminescent colors in a certain order, in which each of the organic EL devices has a pair of two parallel sides in a planar shape, the organic EL devices having luminescent colors different from each other are adjacent to each other at the two parallel sides, and the organic EL devices having the same luminescent color are adjacent to each other in a parallel line direction of the two parallel sides, and are arrayed to be of shape of stripes arranged parallel to each other while being slanted with respect to a vertical line.

Abstract: The object of the present invention is to provide an electroplating method that enables the high-speed treatment of articles to be plated that was difficult to achieve with the conventional tin-zinc electroplating. The present invention provides a method for electroplating with a tin-zinc alloy that is performed under the following conditions: plating bath temperature 30 to 90° C., plating bath stirring rate 5 to 300 m/min, and cathode current density 5 to 200 A/dm2. Preferably, in the tin-zinc alloy plating bath, the divalent tin ion concentration is 1 to 100 g/L and the zinc ion concentration is 0.2 to 80 g/L.