Abstract: The objective of the present invention is to measure gas concentration with a high degree of accuracy. A gas sensor is provided with: a sensor enclosure: an ultrasonic transducer provided at one end of the sensor enclosure; an ultrasonic wave reflecting surface which is provided at the other end of the sensor enclosure and which intersects an axial direction of the sensor enclosure; and a plurality of ventilation holes provided in a side wall of the sensor enclosure. The plurality of ventilation holes are provided at positions such that one side of the sensor enclosure cannot be seen from the other side thereof when viewed from a side surface side of the sensor enclosure, and each ventilation hole has a shape extending in the axial direction of the sensor enclosure.

Abstract: A metal-supported catalyst, a battery electrode, and a battery, each having both excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles each containing a noble metal supported on the carbon carrier, wherein a volume of first pores each having a diameter of 0.5 nm or more and 2.0 nm or less per unit weight of the carbon carrier is 0.20 (cm3/g-carrier) or more, wherein a volume of second pores each having a diameter of more than 2.0 nm and 4.0 nm or less per unit weight of the carbon carrier is 0.20 (cm3/g-carrier) or more, and wherein a ratio of a content (wt %) of the noble metal measured by X-ray photoelectron spectroscopy, to a content (wt %) of the noble metal measured by inductively coupled plasma mass spectrometry, is 0.35 or more and 0.75 or less.

Abstract: Provided is a marine biodegradation promoter that is a hydrophobic powder composed of a compound in which ionic bonds bond a metal cation having a valence of 2 or higher and two or more monovalent organic anions that have different structures selected from among monovalent organic anions derived from monovalent carboxylic acids, monovalent sulfonic acids, monovalent sulfate esters, and monovalent phosphate esters, said marine biodegradation promoter either dissolving in a 3 mass % aqueous sodium chloride solution, or exhibiting hydrophilicity in a 3 mass % aqueous sodium chloride solution, wherein at least one of the two or more organic anions contains a monovalent hydrocarbon group having 6-30 carbon atoms.

Abstract: Provided is a marine biodegradable polyol that is a compound which: includes at least two organic anions having a molecular weight of 100-5000; has a structure in which said organic anions are bonded by ionic bonds formed by a metal cation having a valence of two or higher, and includes at least two hydroxyl groups in each molecule.

Abstract: A simple, highly versatile method for fixing smooth materials that utilizes a water pasting method can be provided by interposing an ionic liquid between smooth materials such as glass or resin not impregnated with an ionic liquid and fixing these smooth materials.

Abstract: A marine biodegradable polymer compound composed of a monovalent metal cation and a polymeric polyvalent anion which has a repeating unit including at least one bond selected from among ether bonds, ester bonds, amide bonds, and carbonate bonds in the main chain thereof, and which has a total of two or more monovalent anionic substituent groups at the terminals of the main chain and/or a side chain.

Abstract: Provided is a marine biodegradation promoter that is a hydrophobic, thermoplastic powder composed of a compound in which ionic bonds bond a metal cation having a valence of two or higher and a monovalent organic anion derived from a substance selected from among monovalent carboxylic acids containing a monovalent hydrocarbon group having 10-25 carbon atoms, monovalent sulfonic acids containing a monovalent hydrocarbon group having 10-25 carbon atoms, monovalent sulfate esters containing a monovalent hydrocarbon group having 10-25 carbon atoms, and monovalent phosphate esters containing a monovalent hydrocarbon group having 10-25 carbon atoms, wherein the powder dissolves in a 3 mass % aqueous sodium chloride solution, or exhibits hydrophilicity in a 3 mass % aqueous sodium chloride solution.

Abstract: A catalyst for hydrogen production that achieves both excellent catalytic activity and excellent durability, and a method of producing hydrogen using the catalyst, wherein the catalyst includes: a carbon carrier; and catalyst metal particles supported on the carbon carrier, wherein the catalyst metal particles each contain a noble metal, wherein the catalyst for hydrogen production has a ratio of a BJH mesopore volume to a BJH micropore volume of 0.30 or more and 7.80 or less obtained by a nitrogen adsorption method, and wherein the catalyst for hydrogen production has a ratio of a total of a BJH micropore area and a BJH mesopore area to a BJH macropore area of 30 or more and 3,500 or less obtained by the nitrogen adsorption method.

Abstract: Provided is an ionic liquid that can be used for semiconductor manufacturing and that has a low metal ion content. This ionic liquid comprises cations and onions and contains, each by not more than 100 ppb, metal ions of 16 elements indicated by the following element symbols: Li, Na, Ca, Mg, Al, K, Ti, Cr, Mu, Fe, Co, Ni, Cu, Zn, Ba, and W.

Abstract: A metal-supported catalyst, battery electrode, and battery, each having excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles supported thereon, wherein, in a photoelectron spectrum obtained by X-ray photoelectron spectroscopy, the catalyst exhibits, as a peak derived from a is orbital of a nitrogen atom, a peak to be separated into peaks of first to sixth nitrogen atoms having peak tops in the following respective ranges: (1) 398.6±0.2 eV; (2) 399.5±0.3 eV; (3) 400.5±0.2 eV; (4) 401.3±0.3 eV; (5) 403.4±0.4 eV; and (6) 404.5±0.5 eV, wherein a ratio of a peak area of the second nitrogen atoms to a total peak area of the nitrogen atoms of the (1) to (6) is 0.03 or more, and wherein a ratio of a concentration of the second nitrogen atoms to a concentration of carbon atoms measured by the X-ray photoelectron spectroscopy is 0.0005 or more.

Abstract: A fuel cell separator which is obtained by molding a composition that contains a carbonaceous material and a resin, and which is provided with a sealing part and a groove that serves as a gas flow channel on one surface or both surfaces. This fuel cell separator is configured such that the arithmetic mean heights Sa of the surface of the sealing part and the bottom surface and the peak of the groove on at least one surface are 0.50-1.60 ?m and the profile peak heights Spk thereof are 1.50 ?m or less as determined in accordance with ISO 25178-2 (2012). Consequently, this fuel cell separator has good hydrophilicity and good adhesion to a gasket.

Abstract: A piezoelectric device comprising a substrate having a cavity, a piezoelectric film covering the cavity and being supported by the substrate, and electrodes disposed so as to sandwich the piezoelectric film. The piezoelectric film has a convex-shaped or concave-shaped vibrating region disposed on the cavity. The vibrating region is configured by a single-layer piezoelectric film including a first region composed of a first piezoelectric material and a second region composed of a second piezoelectric material having a piezoelectric constant larger than that of the first piezoelectric material. A first electrode and a second electrode are disposed so as to sandwich the second region of the piezoelectric film, a first input signal is converted to a first output signal based on displacement at the second region of the piezoelectric film between these electrodes, and a piezoelectric device comprising a convex-shaped vibrating region with high power and high sensitivity is provided.

Abstract: A piezoelectric device including: a substrate having a cavity; a piezoelectric film covering the cavity and laminated and supported on the substrate; and a first electrode and a second electrode being provided to be spaced apart from each other so as to sandwich a part of the piezoelectric film. The first electrode and the second electrode pass through the piezoelectric film in the thickness direction of the piezoelectric film and are disposed above the cavity, an input signal is converted to an output signal based on displacement in a direction of application of a voltage to the piezoelectric film polarized in the direction of application of the voltage by applying the voltage between the first electrode and the second electrode, and a miniature piezoelectric device with high sensitivity is provided that utilizes the longitudinal effect of the piezoelectric effect.

Abstract: A carbon catalyst has a carbon structure with a crystallite size Lc falling within 0.90 nm or more and 1.20 nm or less calculated through use of a Bragg angle of a diffraction peak fbroad at a diffraction angle 2? of 24.0°±4.0° obtained by separating a diffraction peak in the vicinity of a diffraction angle 2? of 26° in an X-ray diffraction pattern obtained by powder X-ray diffraction using a CuK? ray, and a carbon dioxide desorption amount from 650° C. to 1,200° C. of 97 ?mol/g or less, a total of a carbon monoxide desorption amount and a carbon dioxide desorption amount from 650° C. to 1,200° C. of 647 ?mol/g or less, or a carbon monoxide desorption amount from 650° C. to 1,200° C. of 549 ?mol/g or less in a temperature programmed desorption method including measuring a carbon dioxide desorption amount from 25° C. to 1,200° C.

Abstract: Provided is a silyl ether-containing sulfonate salt that contains an anion represented by formula (1) and a cation. (In the formula, R1 to R4 are each independently a C1-4 alkyl group. m is an integer from 1 to 3. n is an integer from 2 to 8.

Abstract: The present invention provides a resin composition for an acoustic matching layer which maintains uniform dispersibility of a hollow filler, can suppress bubble trapping, and is excellent in moldability and handleability. The resin composition for an acoustic matching layer, comprises a resin, a hollow filler, and a thixotropy imparting agent, wherein the resin composition has a viscosity measured using a B-type viscometer with rotor No. 4 at a rotation speed of 0.3 rpm at 25° C. of 1130 to 4000 Pa·s, and has a thixotropy index expressed by the ratio (V1/V2) between a viscosity (V1) measured using a B-type viscometer with rotor No. 4 at a rotation speed of 0.3 rpm and a viscosity (V2) measured using a B-type viscometer with rotor No. 4 at a rotation speed of 1.5 rpm, at 50° C., of 3.0 to 5.0.

Abstract: A magnetic paste which comprises an epoxy resin (A) having an aromatic ring, an epoxy compound (B), a soft-magnetic powder (C), and a hardener (D), wherein the (A), (B), and (D) components have 25° C. viscosities which have relationships (A)>(B) and (A)>(D), and the content of the soft-magnetic powder (C) is 90-96 mass % of the whole magnetic paste. A mixture consisting only of the (A) to (D) components has a 25° C. viscosity, measured with a Brookfield viscometer with a no. 4 rotor at a rotation speed of 0.6 rpm, of 100-1,000 Pa·s at five seconds after initiation of the measurement. This magnetic paste has flowability which can be poured into the mold but is inhibited from suffering the sedimentation of the magnetic particles, and gives a cured object in which up to the upper layer is filled with the soft-magnetic powder even after the thermal curing.

Abstract: Provided is an additive to grease comprising a salt including a silicon-containing phosphoric acid ester anion represented by the following formula (1). In the formula, R1 to R3 are independently alkyl groups having 1-4 carbon atoms. R4 is an alkyl group having 1-8 carbon atoms. n is an integer of 1-8.

Abstract: This gel electrolyte contains a liquid, inorganic nanofibers, and a polymer obtained by polymerizing a compound which has an imidazolium salt having an alkenyl group represented by formula (1-1) and an imidazolium salt having an alkenyl group represented by formula (2-1) at both ends, and in which the compound is swelled by the liquid; the gel electrolyte exhibits proton conductivity equivalent to that of Nafion at room temperature, exhibits proton conductivity greater than or equal to that of Nafion at high temperatures exceeding 60° C., and has excellent strength. (In the formula, X? indicates monovalent anions, Y? represents mutually independent monovalent anions, and n represents an integer 1-20.

Abstract: The present invention provides amphiphilic polymer particles which are formed from a naturally derived starting material and exhibit hydrophobicity, while maintaining an adequate water absorption. An amphiphilic alginic acid particle group which is obtained by subjecting a polyvalent metal salt of alginic acid to a hydrophobization treatment with use of a hydrophobizing agent, wherein: some metal ions in the polyvalent metal salt of alginic acid are hydrophobized through a chemical bond with the hydrophobizing agent; the contact angle at 30 seconds after dropping a water droplet on the particle group is from 300 to 150°; and the water absorption per 100 g of the particles is not less than the oil absorption per 100 g of the particles.