Abstract: A retroreflective sheet 9 of the present invention includes; a surface layer 1; a glass bead holding layer 5 containing glass beads 3 that are located randomly as viewed cross-sectionally; and a metal reflective layer 4 on a back surface side of the glass bead holding layer 5. The surface layer 1 is a vinyl chloride resin layer. The retroreflective sheet further includes, between the vinyl chloride resin layer and the glass bead holding layer, a barrier layer 2 for preventing deterioration of the metal reflective layer. The barrier layer 2 is preferably an alkyd-melamine resin layer. Thereby, it is possible to provide a retroreflective sheet that can prevent the degradation of, e.g., the reflective function of the metal reflective layer on the back surface side of the glass bead holding layer and thus maintaining high weather resistance and wide-angle reflectivity, and that can exhibit high surface printability.

Abstract: Disc-shaped information recording medium comprising optical penetrating substrate having colored underlayer and ink receipt layer in this order on the principal surface of one side of the substrate, wherein the ink receipt layer contains inorganic fine particles, a binder, and a crosslinking agent, and wherein a pore diameter distribution of a gap of the ink receipt layer has a maximum peak in the range of 30 nm or more when the ink receipt layer is measured with a mercury porosimetry method. Since the shrinkage force functioning in the pores of the gaps of the ink receipt layer weakens, a disc-shaped information recording medium having a reduced occurrence of warp is provided.

Abstract: The present invention provides a drug delivery material, which is a conjugate of 1) a drug-carrying molecular assembly, 2) a linker and 3) a substance that recognizes activated platelet, injury site of blood vessel and/or inflammatory tissue, and capable of efficiently delivering a drug to a desired site, during which the drug under delivery does not affect sites other than a desired site (hence, low possibility of causing side effects), which releases the drug only at the desired site without requiring an external means and allows the drug to exhibit an effect.

Abstract: The present invention provides a drug delivery material, which is a conjugate of 1) a drug-carrying molecular assembly, 2) a linker and 3) a substance that recognizes activated platelet, injury site of blood vessel and/or inflammatory tissue, and capable of efficiently delivering a drug to a desired site, during which the drug under delivery does not affect sites other than a desired site (hence, low possibility of causing side effects), which releases the drug only at the desired site without requiring an external means and allows the drug to exhibit an effect.

Abstract: Disc-shaped information recording medium comprising optical penetrating substrate having colored underlayer and ink receipt layer in this order on the principal surface of one side of the substrate, wherein the ink receipt layer contains inorganic fine particles, a binder, and a crosslinking agent, and wherein a pore diameter distribution of a gap of the ink receipt layer has a maximum peak in the range of 30 nm or more when the ink receipt layer is measured with a mercury porosimetry method. Since the shrinkage force functioning in the pores of the gaps of the ink receipt layer weakens, a disc-shaped information recording medium having a reduced occurrence of warp is provided.

Abstract: An optical information recording medium capable of being drawn without being overturned by an optical information recording apparatus and cable of being drawn not depending on the wavelength of a laser light to be irradiated, the optical information recording medium having an information recording portion in which a recording layer and a first reflection layer are formed successively on a first substrate, and having a drawing portion in which a second reflection layer, a color-change layer, a color-change assistance layer, and a protection layer are formed successively on a second substrate, in which the second reflection layer is heated by irradiation of a laser light and the material in the color-change layer and the material in the color-change assistance layer are melted by the heat and mixed to cause a color change thereby forming images.