Abstract: A colorant for fluorescent labeling which has an absorbance retention calculated with equation (I) of 0.5 or greater. When the colorant for fluorescent labeling is dissolved in an organic solvent and the resultant colorant solution is added to phosphate-buffered saline (PBS), then the resultant colorant dispersion (colorant dispersion I) contains dispersed colorant droplets formed therein which have an average droplet diameter of 500 nm or less. Equation (I): Absorbance retention=A1/A0 [In equation (I), A0 indicates the absorbance, at a maximum-absorption wavelength, of the colorant solution (colorant solution I) obtained by dissolving the colorant for fluorescent labeling in the organic solvent and A1 indicates the absorbance, at a maximum-absorption wavelength, of the colorant dispersion (colorant dispersion II) obtained by adding the solution of the colorant for fluorescent labeling to PBS, the colorant solution I and the colorant dispersion II being equal in colorant concentration.

Abstract: A fluorescent labeling agent contains a fluorescent dye represented by general formula (1). General formula (1): Q-Z—R1-R2-R3 (In the formula, Q represents the residue of a fluorescent dye. Z represents a direct bond, alkylene group, or arylene group. R1 represents a direct bond, —O—, —OP(?O)R4—, —OC(?O)—, —OS(?O)2—, —OSiR5R6—, —C(?O)—, or —C(?O)NH—. R2 represents a group selected from the group consisting of alkylene groups, arylene groups, and heterocyclic groups, or represents a group provided by combining these groups. R3 represents —COOM1, —NR7R8, or —N+R9R10R11. Here, R4 represents a hydrogen atom, hydroxyl group, alkyl group, aryl group, alkoxy group, aryloxy group, or heterocyclic group. R5 and R6 each independently represent an alkyl group, aryl group, or heterocyclic group. R7-R11 each independently represent a hydrogen atom, alkyl group, or aryl group. M1 represents a monovalent cation.

Abstract: In an insulated type switchgear device in which a pair of arc electrodes are separably disposed in an opposing manner in a vacuum tube, and having a movable conductor extending from a back face of a movable one of the arc electrodes to the outside of the vacuum tube, the pair of arc electrodes are designed to be separated through a rotation of the movable conductor around a predetermined main axis.

Abstract: In a vacuum type switch gear device an L shaped stationary and movable conductors arrangement, a transitive portion from one spiral arc groove to a neighboring another spiral arc groove on the surface of a movable electrode defined by the terminating end portion of the one spiral groove, the starting end of the adjacent neighboring other spiral groove and the outer circumferential edge portion of the movable electrode is arranged in a substantially overlapping relationship in a vertical direction with the movable conductor. Thus an adverse effect of a current loop flowing through the movable conductor against an arc generated between movable and stationary electrodes is limited to thereby improve the circuit breaking performance.

Abstract: A protection apparatus for a spot network substation has a plurality of receiving lines connected between a network bus and a plurality of power sources. Each receiving line is connected to a primary switching device, a network transformer and a protector CB. A detector for detecting a phase of each receiving line voltage and a judging unit for judging the detected phase are provided on the primary side of each network transformer. A previously stored basic phase is compared with the detected phase of the receiving line voltage. If there is a lag in the detected phase of the receiving line voltage, it is judged to be a power-stop of the corresponding power source and the protector CB is tripped.

Abstract: A starting device for an air bag includes a mass body, a drive shaft and an ignition pin. The mass body detects a rapid deceleration of a vehicle by inertial movement of the mass body. An end portion of the mass body in the direction of inertial movement contacts a vicinity of one end portion of the drive shaft in a longitudinal direction thereof. The drive shaft is urged by an urging member and holds the mass body at a predetermined position due to urging force of the urging member. The drive shaft has an engaging member at a portion of the drive shaft in the longitudinal direction thereof, and is provided so as to be rotatable around the engaging member by the inertial movement of the mass body. The ignition pin includes a shaft member and a stepped collar member, the stepped collar member being formed at a portion of the shaft member in the longitudinal direction thereof.