Abstract: A bar-like molding made of fiber-reinforced plastic materials of the type which can be extended by connecting pieces thereof, comprises a fiber-reinforced plastic covering layer formed by laminating a plurality of fiber-reinforced plastic layers and short length metal pipes for connection arranged at the ends of the fiber-reinforced plastic covering layer, the fiber-reinforced plastic covering layer including an inner fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and abutting at its ends against the respective inner end surfaces of the short length metal pipes for connection, and an outer fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and formed in such a manner as to cover the outer peripheries of said inner fiber-reinforced plastic covering layer and the short length metal pipes for connection, the reinforcing fibers of at least one of the plurality of fiber-reinforced plastic layers of at least one of t

Abstract: An ultrasonic atomizing apparatus including an ultrasonic vibration generator and an ultrasonic vibrator horn having a cylindrical section connected at one end to the ultrasonic vibration generator and having a flared portion connected to the other end of the cylindrical section. The flared portion is flared and enlarged in diameter towards the tip end of the horn and is adapted to atomize liquid material on the flared portion as the liquid material is supplied from a liquid material supply nozzle to the flared portion. A hollow recess is formed in the flared portion opening toward the tip end of the horn. The geometry of the hollow recess is such that the cross-sectional area of the flared portion of the horn in any plane perpendicular to the longitudinal axis of the horn is the same as the cross-sectional area of the flared portion in all other planes perpendicular to the longitudinal axis of the horn.

Abstract: A calcium-phosphate type hydroxyapatite for chromatographic separation is in the form of spherulites having a mean particle diameter of 0.5 to 50 .mu.m, preferably 1 to 10 .mu.m. The spherulites are each an aggregate mainly of acicular crystallites belonging to a series of hexagonal systems and having unit lattice constants of 9.58.+-.0.08 .ANG. for the a axis and 7.00.+-.0.05 .ANG. for the c axis. The hydroxyapatite is produced by granulating a calcium-phosphate type hydroxyapatite in the form of a gel and then firing the granular apatite at 400.degree. to 700.degree. C., preferably at 500.degree. to 600.degree. C. The firing is performed by heating the granules in the presence of oxygen or air for a given period of time.