Abstract:
An engine piston composed of a head and a body separately formed from the head. The head is of ceramic material and the body is light metal or light alloy. The head and the body are connected against axial movement by interengagement of inclined surfaces on the head and body by rotation of the head relative to the body, and the head and body are then fixed against relative rotation by an anti-turning device, this arrangement preventing development of excessive thermal stress. The piston is of reduced weight, can be mass-produced, and reduces fuel consumption.
Abstract:
The present invention relates to an oxygen concentration detector to be used in a system which can simultaneously dispose of the three harmful elements in automotive emissions, i.e., unburnt hydrocarbons (unburnt HC), carbon monoxide (CO) and nitrogen oxides (NOx) through reaction with catalyst. In said detector an oxygen concentration cell comprises a solid electrolyte of a special ceramic material characterized by oxygen ion-conductivity; and the oxygen concentration of a measured gas can be analyzed by measuring the electromotive force generated through a difference in the oxygen partial pressure between the measured gas and a reference gas.
Abstract:
The present invention relates to a catalyst carrier characterized by the fact that it comprises a substance which promotes a transition to .alpha.-alumina, which substance is located near the surface of a carrier composed mainly of alumina and which carrier is subjected to a heat treatment under appropriate conditions, thereby causing the transition of said alumina to .alpha.-alumina, with those pores near the surface made larger in diameter than those pores located more deeply within the carrier. The invention also includes a method of manufacturing said catalyst carrier.
Abstract:
A surface-covered cermet member capable of improving an oxidation resistance while maintaining excellent performance of a titanium series sintered compact is provided. The invention is directed to a surface-covered cermet member in which an oxidation resistant film 12 is formed on a cermet base material 11 made of a sintered compact containing at least one or more titanium compounds selected from titanium carbide, titanium nitride, and titanium carbonitride as a major component of a hard phase. In the surface-covered cermet member of the present invention, the oxidation resistant film 12 is constituted by a complex oxide containing titanium.
Abstract:
A thin film capacitor with high capacity and low leak current is provided. The thin film capacitor includes a nickel substrate with nickel (Ni) purity of 99.99 weight percent or above, and a dielectric layer and an electrode layer disposed in this order on the nickel substrate. The thin film capacitor is typically manufactured as follows. A precursor dielectric layer is formed on a nickel substrate with nickel purity of 99.99 weight percent or above, and is subjected to annealing to form a dielectric layer. The diffusion of impurities from the nickel substrate to the precursor dielectric layer during annealing is suppressed.
Abstract:
The present invention relates to a copper-containing formulation for plant disease-control which comprises divalent copper and polyphosphate residues, wherein the amount of the polyphosphate residues per one chemical equivalent of the divalent copper is higher than one chemical equivalent. The copper-containing formulation of the present invention shows an excellent disease-control effect without causing any chemical injury of the plant.
Abstract:
A method of producing a magnetic garnet single crystal film formation substrate 2 for growing a magnetic garnet single crystal film by liquid phase epitaxial growth is provided. First, a base substrate 10 composed of a garnet-based single crystal being unstable with a flux used for the liquid phase epitaxial growth is formed. Next, a buffer layer 11 composed of a garnet-based single crystal thin film formed at least on a crystal growing surface of said base substrate 10 and being stable with the flux is formed. When forming the buffer layer 11 on the base substrate 10, it is formed by a thin film formation method, such as sputtering, without heating the substrate 10 in a positive manner.
Abstract:
A magneto-optical disk of the present invention includes a substrate and a recording layer disposed above the substrate, and reproduces an information signal by a DWDD system, using light incident from the substrate side. The optical disk further includes a first dielectric layer disposed between the substrate and the recording layer and a second dielectric layer disposed on the recording layer opposite to the substrate, wherein the recording layer is initialized with light having a wavelength &lgr; incident from the second dielectric layer side, and the thickness of the second dielectric layer is in a range of &lgr;/(12×n) to &lgr;/(2×n) (where n is a refractive index of the second dielectric layer).
Abstract:
The present invention relates to an antisense nucleic acid compound which has a nucleotide sequence complementary to at least 8 contiguous nucleotides in the nucleotide sequence of a gene coding for a vascular endothelial growth factor and which inhibits the expression of the vascular endothelial growth factor, as well as to a therapeutic or diagnostic agent for cancers, rheumatoid arthritis, diabetes etc., comprising said antisense nucleic acid as active ingredient. Further, the present invention relates to a method of preventing the expression of the vascular endothelial growth factor, comprising use of an antisense nucleic acid compound which has a nucleotide sequence complementary to at least 8 contiguous nucleotides in the nucleotide sequence of a gene coding for a vascular endothelial growth factor and which inhibits the expression of the vascular endothelial growth factor.
Abstract:
The present invention provides nucleic acid compounds which have a non-nucleic acid structure with ring skeleton to which two functional groups are bound with fixed state and are able to point to substantially the same direction, nucleic acid compounds which can form triple strands with third nucleotide chains, nucleic acid compounds which have improved permeability, and synthetic methods thereof.