Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.

Abstract: The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3?-diallyl-4,4?-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.

Abstract: To provide an artificial annulus sizing tool capable of determining a suitable size for an artificial annulus to be implanted in a patient. [Solution] An artificial annulus sizing tool comprising an annular core material and a cover material covering the core material to a predetermined thickness, the cover material portion being attached to the annulus using suturing thread for implanting artificial annuli, and the part of the cover material engaged with the suturing thread being broken after a suitable artificial annulus size is determined for the annulus, allowing for removal from the suturing thread.

Abstract: The present invention relates to a porphyrazine coloring matter represented by the following formula (1): (wherein, A, B, C and D independently represents a 6-membered ring having aromaticity, at least one or more is a benzene ring, at least one or more contains a nitrogen-containing heteroaromatic ring; in addition, E represents alkylene and each of X and Y independently represents a substituted or unsubstituted anilino group or a substituted or unsubstituted naphthylamino group; and b is 0 to 2.9, c is 0.1 to 3 and the sum of b and c is 1 to 3) which has a good hue as a cyan ink, is excellent in light fastness, ozone fastness and moisture fastness, and does not cause bronze phenomenon, as well as is thus suitable for inkjet recording.

Abstract: The present invention relates to a porphyrazine coloring matter represented by the following formula (1): (wherein, A, B, C and D independently represents a 6-membered ring having aromaticity, at least one or more is a benzene ring, at least one or more contains a nitrogen-containing heteroaromatic ring; in addition, E represents alkylene and each of X and Y independently represents a substituted or unsubstituted anilino group or a substituted or unsubstituted naphthylamino group; and b is 0 to 2.9, c is 0.1 to 3 and the sum of b and c is 1 to 3) which has a good hue as a cyan ink, is excellent in light fastness, ozone fastness and moisture fastness, and does not cause bronze phenomenon, as well as is thus suitable for inkjet recording.

Abstract: A bump formation plate is provided with a base and solder bumps formed on the base. The top portion of the solder bump inclines from the center thereof to the periphery thereof. A contact surface of the solder bump with the base may be flat. The base is made of, for example, aluminum or stainless steel.

Abstract: A bump formation plate is provided with a base and solder bumps formed on the base. The top portion of the solder bump inclines from the center thereof to the periphery thereof. A contact surface of the solder bump with the base may be flat. The base is made of, for example, aluminum or stainless steel.

Abstract: A bump formation plate is provided with a base and solder bumps formed on the base. The top portion of the solder bump inclines from the center thereof to the periphery thereof. A contact surface of the solder bump with the base may be flat. The base is made of, for example, aluminum or stainless steel.

Abstract: A bump formation plate is provided with a base and solder bumps formed on the base. The top portion of the solder bump inclines from the center thereof to the periphery thereof. A contact surface of the solder bump with the base may be flat. The base is made of, for example, aluminum or stainless steel.