Abstract: An endless flat belt includes an inner rubber layer 1, a cord core 11 buried in the inner rubber layer 1 and spirally wound at a predetermined pitch in a width direction of the belt, and a reinforcement fabric 2 stuck to the inner rubber layer 1. The cord core comprises polyamide fiber. Opposite ends of the reinforcement fabric 2 are connected with each other into an endless form by adhesion or sewing. A surface rubber layer 3 is stuck to a surface of the reinforcement fabric 2 which is opposite a surface thereof stuck to the inner rubber layer 1.

Abstract: An endless flat belt includes an inner rubber layer 1, a cord core 11 buried in the inner rubber layer 1 and spirally wound at a predetermined pitch in a width direction of the belt, and a reinforcement fabric 2 stuck to the inner rubber layer 1. The cord core comprises polyamide fiber. Opposite ends of the reinforcement fabric 2 are connected with each other into an endless form by adhesion or sewing. A surface rubber layer 3 is stuck to a surface of the reinforcement fabric 2 which is opposite a surface thereof stuck to the inner rubber layer 1.

Abstract: The present invention provides a dentinogenesis inducer and dentinogenesis pulp-capping material, which are effectively used for formation (regeneration) of dentin. The present invention also provides a method of producing odontoblasts useful for dental regenerative therapy and the application of the obtained odontoblasts. The dentinogenesis inducer and the dentinogenesis pulp-capping material of the present invention are both characterized by the use of an HMG-CoA reductase inhibitor as an active ingredient. Additionally, odontoblasts can be produced by culturing cells capable of differentiating into odontoblasts in the presence of the HMG-CoA reductase inhibitor.

Abstract: In a magnetic head comprising a head gap and a magnetic core composed of both a high permeability ferrite and a magnetic alloy, said magnetic alloy being disposed in the vicinity of said head gap,the improvement comprising a corrugation provided at a junction portion between said ferrite and said magnetic alloy, a height of said corrugation being not less than a value of the longest wavelength of luminance signals and color signals recorded on a magnetic recording medium, a distance defined between adjacent two crests or bottoms of said corrugation being smaller than a width of a head track.

Abstract: In a magnetic head comprising a head gap and a magnetic core composed of both a high permeability ferrite and a magnetic alloy, said magnetic alloy being disposed in the vicinity of said head gap,the improvement comprising a corrugation provided at a junction portion between said ferrite and said magnetic alloy, a height of said corrugation being not less than a value of the longest wavelength of luminance signals and color signals recorded on a magnetic recording medium, a distance defined between adjacent two crests or bottoms of said corrugation being smaller than a width of a head track.

Abstract: In magnetic tape copying method and apparatus wherein a slave tape heated to a temperature near the Curie point and a master tape having a signal recorded thereon are put together with their magnetic surfaces in contact with each other and then cooled, an improvement of reheating the slave tape, after the completion of the transfer, under a smaller tension than that applied during the transfer at a temperature lower than the Curie point to prevent the occurence of skew distortion on a reproduced picture due to deformation with the passage of time of the slave tape.