Abstract: An object of the present invention is to provide a test/diagnosis method for fertility which allows the estimation of the possibility of leading to pregnancy based on the ability of sperm to fuse with an egg and the identification of a cause of infertility; and a polynucleotide and a fertility testing kit which are used in the method.

Abstract: An object of the present invention is to provide a test/diagnosis method for fertility which allows the estimation of the possibility of leading to pregnancy based on the ability of sperm to fuse with an egg and the identification of a cause of infertility; and a polynucleotide and a fertility testing kit which are used in the method.

Abstract: The present invention is applicable to composite particles for composite dispersion plating used for forming a self-lubricating composite dispersion coating and a method of plating using such composite particles as well as a plating (coating) using the same. The purpose of the invention is to obtain a composite particle for composite dispersion plating which is comprised of a particle with an excellent capability of reducing the friction and a low or very low specific gravity, and a method of plating using such composite particles. In this invention, each of the composite particles includes a friction-reducing mother or core particle (1) encapsulated with shell particles (2) comprised of the same components as a base metal of a composite dispersion plating bath (5). This provides a composite particle for composite dispersion plating which is comprised of a particle with an excellent capability of reducing the friction and a low or very low specific gravity.

Abstract: A sintered composite comprises capsule-like powder composite particles composed of core particles and an electrically conductive covering material which covers said core particles. The capsule-like powder composite particles are sintered in a sintering mold while pulsed voltages are being applied to the powder composite particles.

Abstract: A method of modifying qualities of a metallic article at a particular surface of the article comprises the step of melting the surface by imparting a flux of high density energy to the surface to form a molten metal layer and the step of adding heat resisting element to the molten metal layer by performing overlay welding to the molten metal layer.

Abstract: A method of strengthening an aluminum casting by modifying qualities of a specified part thereof comprises the steps of forming a weld overlay on the specified part using powders made of heat resisting element and remelting the specified part, now overlaid with the layer of heat resisting alloy layer, using high density energy.

Abstract: A method of modifying surfaces of metal parts comprises melting an area of metal surface by high-density energy irradiation, sensing the temperature (t) of the melted area, and of carrying out the build-up welding by using a wire (8) containing a heat-resistant alloying element (25).

Abstract: A cast product made from metallic material and ceramic material with the ceramic material being an insert, comprises an aggregated body of capsule particles, the capsule particle including a ceramic particle coated with metallic particles, and metallic material cast over the aggregated body.

Abstract: A partially hardened sintered body such as a rocker arm comprises powder forming a main body and a capsule-like powder composite disposed adjacent to the powder and composed of core particles made of a material harder than the powder and covering particles covering the core particles and made of the same material as the powder. The powder and the capsule-like powder composite are solidified into the partially hardened sintered body.

Abstract: Parts for an internal combustion engine such as a piston and a cylinder head manufactured by mixing inorganic coating material with potassium titanate fibers, silicon nitride whiskers and/or glass balloons, adding to and mixing with the above mixture calcium oxide (CaO) as a hardening promoter, drying the article so produced, and baking the same. The potassium titanate fibers is 5 to 40%, the silicon nitride whisker is 10 to 50%, and the glass balloon is 0 to 15% in weight of the inorganic coating material, and the calcium oxide is 1 to 10% of the total weight of the potassium titanate fibers, silicon nitride whiskers and/or glass balloons. The drying time is reduced by adding CaO as a hardening promoter.

Abstract: Parts for an internal combustion engine such as a piston and a cylinder head manufactured by mixing inorganic coating material with potassium titanate fibers, silicon nitride whiskers and/or glass balloons, adding to and mixing with the above mixture calcium oxide (CaO) as a hardening promoter, drying the article so produced, and baking the same. The potassium titanate fibers is 5 to 40%, the silicon nitride whisker is 10 to 50%, and the glass balloon is 0 to 15% in weight of the inorganic coating material, and the calcium oxide is 1 to 10% of the total weight of the potassium titanate fibers, silicon nitride whiskers and/or glass balloons. The drying time is reduced by adding CaO as a hardening promoter.

Abstract: A machine tool arrangement comprising a main electric motor including a rotor having a hollow cylindrical rotor shaft intergral therewith and extending therethrough. A hollow driving spindle is disposed coaxially with the rotor shaft and the spindle is inserted in the rotor shaft at one end thereof for relative axial and rotation movement. The spindle is driven in rotation by the rotor and it is provided at its opposite end with an arbor-receiving opening. A draw rod extends through the rotor shaft and the spindle and has an externally threaded end engageable in the internally threaded opening in the arbor for securely attaching the arbor to the spindle. A positioning mechanism serves for adjusting the position of the arbor relative to a workpiece.