Abstract: Provided are a sputtering target composed of a Cu—Ga sintered compact that has a further reduced oxygen content and can suppress abnormal discharges, and a method for producing the same. The sintered compact has a component composition containing a Ga content of 20 at % or higher and less than 30 at % with the balance being Cu and inevitable impurities, and has an oxygen content of 100 ppm or lower and an average grain size of 100 ?m or less, and exhibits the diffraction peaks assigned to the ? and ? phases of CuGa as observed in X-ray diffraction, wherein the main peak intensity of the diffraction peaks assigned to the ? phase is 10% or higher relative to that of the diffraction peaks assigned to the ? phase.

Abstract: The present invention provides a sputtering target of a Cu—Ga sintered body in which the oxygen content is further reduced and the abnormal discharging can be suppressed, and a method for producing the same. The sputtering target according to the present invention is a sintered body having: a texture in which Na compound phases are dispersed in a matrix with a ? phase and a ? phase of a Cu—Ga alloy; and a component composition made of: 20 atomic % to 30 atomic % of Ga; 0.05 atomic % to 10 atomic % of Na; and the Cu balance and inevitable impurities including elements other than Na in the Na compound, wherein an average grain size of the ? phase is 30 ?m to 100 ?m, and an average grain size of the Na compound phases is equal to or less than 8.5 ?m.

Abstract: According to the present invention, a Cu—Ga alloy sputtering target which is a sintered body has a composition with 29.5 atom % to 43.0 atom % of Ga and a balance of Cu and inevitable impurities. A Cu—Ga alloy crystal particle in the sintered body has a structure in which ? phase particles are dispersed in a ?1-phase crystal particle. A method for producing the sputtering target includes a step of performing normal pressure sintering by heating a molded body formed of a powder mixture of a pure Cu powder and a Cu—Ga alloy powder in a reducing atmosphere, and a step of cooling the obtained sintered body at a cooling rate of 0.1° C./min to 1.0° C./min, at a temperature having a range of 450° C. to 650° C.

Abstract: According to the present invention, a Cu—Ga alloy sputtering target which is a sintered body has a composition with 29.5 atom % to 43.0 atom % of Ga and a balance of Cu and inevitable impurities. A Cu—Ga alloy crystal particle in the sintered body has a structure in which ? phase particles are dispersed in a ?1-phase crystal particle. A method for producing the sputtering target includes a step of performing normal pressure sintering by heating a molded body formed of a powder mixture of a pure Cu powder and a Cu—Ga alloy powder in a reducing atmosphere, and a step of cooling the obtained sintered body at a cooling rate of 0.1° C./min to 1.0° C./min, at a temperature having a range of 450° C. to 650° C.

Abstract: Provided are a sputtering target composed of a Cu—Ga sintered compact that has a further reduced oxygen content and can suppress abnormal discharges, and a method for producing the same. The sintered compact has a component composition containing a Ga content of 20 at % or higher and less than 30 at % with the balance being Cu and inevitable impurities, and has an oxygen content of 100 ppm or lower and an average grain size of 100 ?m or less, and exhibits the diffraction peaks assigned to the ? and ? phases of CuGa as observed in X-ray diffraction, wherein the main peak intensity of the diffraction peaks assigned to the ? phase is 10% or higher relative to that of the diffraction peaks assigned to the ? phase.

Abstract: The present invention provides a sputtering target of a Cu—Ga sintered body in which the oxygen content is further reduced and the abnormal discharging can be suppressed, and a method for producing the same. The sputtering target according to the present invention is a sintered body having: a texture in which Na compound phases are dispersed in a matrix with a ? phase and a ? phase of a Cu—Ga alloy; and a component composition made of: 20 atomic % to 30 atomic % of Ga; 0.05 atomic % to 10 atomic % of Na; and the Cu balance and inevitable impurities including elements other than Na in the Na compound, wherein an average grain size of the ? phase is 30 ?m to 100 ?m, and an average grain size of the Na compound phases is equal to or less than 8.5 ?m.

Abstract: An object of the present invention is to provide a useful and novel phosphoramidite compound for the synthesis of oligo-RNA. A phosphoramidite compound represented by general formula (1), wherein: BX represents a nucleobase optionally having a protecting group; and R1 is a substituent represented by general formula (2), wherein: R11, R12 and R13 are the same or different and each represents hydrogen or alkoxy; R2a and R2b are the same or different and each represents alkyl, or R2a and R2b taken together with the adjacent nitrogen atom may form a 5- to 6-membered saturated amino cyclic group, the amino cyclic group optionally having an oxygen or sulfur atom as a ring-composing member in addition to the adjacent nitrogen atom; and WG1 and WG2 are the same or different and each represents an electron-withdrawing group.

Abstract: Provided are a sputtering target for forming a magnetic recording medium film, on which a film having a low ordering temperature can be formed and which can suppress generation of particles, and a method for producing the same. The sputtering target for forming a magnetic recording medium film consists of a sintered body having a composition represented by the general formula: {(FexPt100-x)(100-y)Agy}(100-z)Cz, wherein x, y, and z are represented by atomic percent as 30?x?80, 1?y?30, and 3?z?63. Also, the method for producing the sputtering target has a step of hot pressing a mixed powder of AgPt alloy powder, FePt alloy powder, Pt powder, and graphite powder or carbon black powder in a vacuum or an inert gas atmosphere.

Abstract: An object of the present invention is to provide a useful and novel phosphoramidite compound for the synthesis of oligo-RNA. A phosphoramidite compound represented by general formula (1), wherein: BX represents a nucleobase optionally having a protecting group; and R1 is a substituent represented by general formula (2), wherein: R11, R12 and R13 are the same or different and each represents hydrogen or alkoxy; R2a and R2b are the same or different and each represents alkyl, or R2a and R2b taken together with the adjacent nitrogen atom may form a 5- to 6-membered saturated amino cyclic group, the amino cyclic group optionally having an oxygen or sulfur atom as a ring-composing member in addition to the adjacent nitrogen atom; and WG1 and WG2 are the same or different and each represents an electron-withdrawing group.

Abstract: The present invention provides a chain-shortened polynucleotide wherein the proportion of a 2?-5? phosphodiester bond is up to 3% based on the whole phosphodiester bonds or a salt thereof and a pharmaceutical composition containing the same, and a method for producing the same.

Abstract: The present invention to novel nociceptin receptor agonists which are peptide derivatives represented by the following general formula (1): (in which A is alkylene, —CH2)nCO— or a group expressed by the following formula (2) or (3): wherein n represents an integer of 1 to 8; X and Y are same or different and each represents —CONH— or —CH2NH—; R1, R2 and R3 are same or different and each represents alkyl, aryl or heteroaryl; Z represents —CON(R4)R5 or —CH2N(R4)R5; R4 and R5 are same or different and each represents hydrogen, alkyl, aryl or heteroaryl) or a pharmaceutically acceptable salt thereof. A pharmaceutical composition according to the present invention is useful as a nociceptin receptor agonist.

Abstract: The present invention provides a chain-shortened polynucleotide wherein the proportion of a 2′-5′ phosphodiester bond is up to 3% based on the whole phosphodiester bonds or a salt thereof and a pharmaceutical composition containing the same, and a method for producing the same.

Abstract: The present invention provides a chain-shortened polynucleotide wherein the proportion of a 2′-5′ phosphodiester bond is up to 3% based on the whole phosphodiester bonds or a salt thereof and a pharmaceutical composition containing the same, and a method for producing the same.

Abstract: A burglar detection apparatus has a tag 11 that includes a resonance circuit. The tag is preferably contained with an object 15 whose theft is desired to be detected. The tagged object may be placed in a drawer 14 which is contained in a box 13. A tag detection sensor 16 is installed in the box and detects whether the tag 11 is present in the drawer 14. Also, a drawer sensor 17 detects whether the drawer is opened. Based on respective detection outputs of the tag detection sensor 16 and the drawer sensor 17, a control circuit 19 controls an alarm 18. Advantageously, the apparatus can be installed in a comparatively small space, does not malfunction even if subjected to large amounts of electrical noise, and reliably detects the presence or absence of a tag even if the tag is located near a metal object.

Abstract: The resonance frequency of a resonant circuit section does not change even if the surface of an article whose theft is monitored is formed of any material. An antitheft tag mounted on the article (11) whose theft is monitored includes a resonant circuit section resonating with the radio wave having a particular frequency and transmitted from a transmitting antenna. An electromagnetic shield layer formed of an insulating material is interposed between the mounting surface of the article and the resonant circuit section. The electromagnetic shield layer may be formed of ferrite powder or soft magnetic powder which has a particle size of 10 &mgr;m or less and plastic or rubber or may be formed by laminating a first layer composed of a composite material and a second layer composed of plastic or rubber. Preferably, the soft magnetic powder is any of amorphous alloy, Permalloy, soft magnetic iron, silicon steel, Sendust alloy and Fe—Al alloy.

Abstract: A tag disclosed in this invention detects theft of bills, notes, or securities positioned therewith in a cash register, a safe, or the like. The capability of a tag-detecting sensor is not affected by a conductive or magnetic auxiliary member disposed between the sensor and the tag. The tag for detecting theft, which has one or more resonant circuit sections on an insulating base sheet, is positioned with an article in a specified place. An alarm is not activated when the tag is detected by the sensor, while it is activated when the tag is not detected by the sensor. At least one of the resonant circuit sections is disposed apart from the conductive or magnetic auxiliary member, with respect to the auxiliary member to be disposed between the sensor and the tag. The specified place refers to a case positioned in a cash register or a safe; the article includes bills, notes, or securities; and the auxiliary member is a metal retainer.

Abstract: This invention relates to a magnetic recording powder having a low Curie temperature and a high saturation magnetization (.sigma.s). The magnetic recording powder of this invention is of a composite oxide having a hexagonal ferrite type crystal structure comprises: (a) between 14 and 20 atomic % of at least one of strontium oxide and barium oxide, (b) between 15 and 40 atomic % of chromium oxide, (c) between 2 and 15 atomic % of at least one member of the group consisting of zinc oxide, magnesium oxide and copper oxide, (d) between 2 and 15 atomic % of at least one member of the group consisting of titanium oxide, zirconium oxide and tin oxide, with substantial remainder being iron oxide and unavoidable impurities. Further, the magnetic recording powder of this invention is of a composite oxide having saturation magnetization (.sigma.s) of 15 emu/g or higher, and a Curie temperature (Tc) of 155.degree. C. or lower.

Abstract: A magnetic recording powder for use as a material for magnetic recording media including magnetic tapes and magnetic cards, the powder having a high coercive force at room temperatures and a low Curie point, consists of at least one element selected from the group consisting of Y and rare-earth elements (R): 5-20 atomic %, B: 5-20 atomic %, Mn: 4-20 atomic %; and Fe and inevitable impurities: the balance. If required, the powder may further contain Al: 1-10 atomic %, and/or Cr: 1-10 atomic %. The powder has a mean particle size of 0.5-2 .mu.m and a mean crystal grain size of 0.1-0.4 .mu.m.

Abstract: The present invention provides heat reserving materials comprising alloys of Ru and at least one rare earth metal which are represented by the formula (I):(A.sub.1-x B.sub.x).sub.z Ru.sub.1-y C.sub.ywherein A represents one or two or more of Er, Ho and Dy; B represents one or two or more of the other rare earth metals; C represents one or two or more of Co, Ni, Al, Cu, Pd, Rh, Au, Ag, Cr, Mn, V and B; x is not less than 0 and not more than 0.5; y is not less than 0 and less than 1.0; and z is more than 1.1 and less than 5.0.When the heat reserving materials of the present invention are used in a cryogenic refrigerator, very low temperatures of not higher than 10 K. can be achieved. Specific heat properties of the materials can be varied as desired by adjusting the content ratio of the plural phases each of which has a different magnetic transition temperature.