Abstract: The present invention relates to a photocatalyst coating liquid capable of forming on an organic substrate a photocatalyst film that is excellent in photocatalytic functions such as super-hydrophilic nature and the performance of maintaining super-hydrophilic nature in a dark place and that has excellent durability, the photocatalyst coating liquid being excellent in stability, and a photocatalyst film formed therefrom, and there are provided a photocatalyst coating liquid comprising (A) titanium oxide fine particles formed of anatase type crystal, (B) colloidal silica and (C) a binder formed of a hydrolysis-condensate of a titanium alkoxide, and having, based on the total solid content, a component (A) content of 5 to 50 mass %, a component (B) content, as a solid content, of 25 to 75 mass % and a component (C) content, as a TiO2 slid content, of 10 to 55 mass %, and a photocatalyst film formed from the above coating liquid.

Abstract: A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation.

Abstract: A hollow waveguide has a metal-clad pipe having an inside metal layer and an outside metal layer, and a hollow region formed inside of the metal-clad pipe. The metal-clad pipe is formed by pressure-bonding metal pipes each of which is made of a metal material different from each other.

Abstract: An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength ?1 of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the ?1, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n?1.90 and 0.03?k?0.30.

Abstract: A cuff for blood pressure monitor includes an air bag for pressing an upper arm, a curled elastic member wound annularly on the outside of the air bag and changeable in size in a radial direction, and a cover having a bag shape for including the air bag and the curled elastic member. The curled elastic member has an overlapping region in which one end and the other end thereof in a circumferential direction are overlapped with each other. The cuff has a sticker serving as an indicator for showing a spot to be held by hand in the fitting operation on a surface thereof at a position corresponding to a region opposing to the overlapping region of the curled elastic member or a region closer to the one end of the curled elastic member than the opposing region in the non-fitting state.

Abstract: An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Am represents any one of substituents A1 to An bonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of A1 to An is one having at least one substituted or unsubstituted metallocene residue.

Abstract: An optical recording medium containing in the recording layer a dipyrromethene-metal chelate compound of which the initial principal weight loss temperature is thermogravimetrically from 330° C. through 500° C. inclusive, capable of high speed and high density recording and playback with a laser having a wavelength of 520 to 690 nm.

Abstract: A recordable optical recording medium comprising a recording layer containing an organic dye which can absorb a laser beam and a metal reflective layer directly or via another layer on a transparent supporting substrate having a pre-groove and a pre-pit, wherein the organic dye has a refractive index nk of 2.2 or more at a reproduction wavelength &lgr;2; in relation to the reproduction wavelength &lgr;2, the depths of the pre-groove and the pre-pit on the substrates are more than &lgr;2/4; and the following equations are satisfied: 0.25r≦wg≦0.38r; 0.25≦wp/wg≦0.

Abstract: An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength &lgr;1 of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the &lgr;1, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n≧1.90 and 0.03≦k≦0.30.

Abstract: A recordable optical recording medium of this invention capable of good recording and reproduction with a laser at wavelengths of 300 to 500 nm and/or 500 to 700 nm comprises at least one porphycene compounds optionally chelated with a metal in its recording layer.

Abstract: An optical information recording medium comprising a transparent substrate and a recording layer formed thereon, wherein the recording layer contains an extended porphyrin compound represented by the following general formula (1): 1

Abstract: An optical information recording medium is here disclosed which comprises a transparent substrate, a recording layer comprising an organic dyestuff on which information can be written by a laser beam, a reflective layer and a protective layer formed in this order on the substrate, the aforesaid optical information recording medium being characterized by containing a pit-edge control agent for the formation of recording pits, particularly a dyestuff thermal decomposition accelerator in the recording layer. By the addition of the pit-edge control agent, deviation properties and jitter properties can be remarkably improved, whereby a CD-R medium having a low error rate and good recording properties can be provided. In consequence, stable compatibility with a commercial CD player can be secured.