摘要:
A method for the conversion of an unsaturated compound having a functional group, characterized by contacting [1] at least one compound selected from the group consisting of carboxylic acid esters, nitriles, ketones, amides, and ethers and having a carbon-to-carbon double bond and no unsaturation at the position conjugate to said double bond, or a mixture of said compound [1] and [2] at least one compound selected from the group consisting of ethylenically unsaturated compounds having a carbon-to-carbon double bond and neither unsaturation at the position conjugate to said double bond nor a functional group, with a catalyst system consisting essentially of a combination of (A) at least one member selected from the group consisting of tungsten compounds, molybdenum compounds, and rhenium compounds, with (B) at least one organoaluminum compound having at least one carbon-to-aluminum bond.
摘要:
Novel polymers or copolymers of norbornene-carboxylic acid amides can be obtained by contacting, in the presence or absence of an inert solvent, (I) at least one compound selected from the group consisting of 5-norbornene-2-carboxylic acid amide, 5-norbornene-2,3-dicarboxylic acid diamide and substituted derivatives thereof, or (II) a mixture of the said compound (I) with at least one compound selected from the group consisting of norbornenes having at least one substituent selected from the group consisting of ester groups, nitrile groups, esterified hydroxyl groups, acid imide groups, halogens and acid anhydride groups and cyclic olefins, with a catalyst composed of (a) at least one compound selected from the group consisting of compounds of W, Mo and Re and (b) at least one compound selected from the group consisting of compounds of elements of Groups IA, IIA, IIB, IIIA, IVA and IVB of the Deming Periodic Table, said compounds having at least one element-carbon bond or element-hydrogen bond.
摘要:
A method for the conversion of an unsaturated compound having a functional group, characterized by contacting [1] at least one compound selected from the group consisting of carboxylic acid esters, nitriles, ketones, amides, and ethers and having a carbon-to-carbon double bond and no unsaturation at the position conjugate to said double bond, or a mixture of said compound [1] and [2] at least one compound selected from the group consisting of ethylenically unsaturated compounds having a carbon-to-carbon double bond and neither unsaturation at the position conjugate to said double bond nor a functional group, with a catalyst system consisting essentially of a combination of (A) at least one member selected from the group consisting of tungsten compounds, molybdenum compounds, and rhenium compounds, with (B) at least one organolaluminum compound having at least one carbon-to-aluminum bond.
摘要:
Apparatus to widely change the control amount used for of mixing control in an audio mixer and to momentarily change a knob to a desired setting can be reproduced by selecting a mode in which the control amount for controlling the mixing of audio signals is continuously output and a mode in which the temporarily the stored control amount is output.
摘要:
An IC socket comprises socket board having a plurality of contacts for contacting corresponding lead terminals of an IC package, and a movable plate closed with respect to an upper surface of the socket board. The contacts are brought into contact with the corresponding lead terminals when the movable plate is laterally moved in one direction along the upper surface of the socket board, and the contacts are moved out of contact with the corresponding lead terminals when the movable plate is laterally moved in the other direction. The IC socket further comprises at least one block integrally formed on each of two opposite side edges of one of the movable plate and the socket board, which side edges are parallel with the lateral movement direction of the movable plate relative to the socket board. On each of the two opposite side edges, a pin is inserted into the at least one block so as to be fixed to and movable with the at least one block. At least one pin restricting piece is integrally formed on each of the opposite side edges of the other of the movable plate and the socket board, which side edges are parallel with the lateral movement direction of the movable plate relative to the socket board. The pin restricting pieces are respectively slidingly abutted against surfaces of the pins.
摘要:
A socket for an electric part having a body; a plurality of contacts arranged in an array on the body and adapted to be contacted with contact pieces on the electric part when the electric part is inserted into the socket the contacts each having a contacting portion adapted to engage in pressure contact with a corresponding contact piece, a spring portion for exerting a contact pressure on the contacting portion, and a hook-shaped retaining portion and an operating member having an acting portion over which the hook-shaped retaining portions are hooked in sliding engagement with the acting portion and movably mounted on the socket body for moving the retaining portions to cause the contacting portions to be shifted away from the contact pieces of the electric part against the resilient force of the spring portions, the acting portion having retaining element damping walls thereon spaced along the acting portion at intervals greater than the thickness of the retaining portions of the contacts and separating and guiding the retaining portions of adjacent contacts during movement of the acting portion.
摘要:
An ultrasonic test equipment includes a water tank for storing ultrasonic medium, an ultrasonic probe provided in the water tank, an ultrasonic medium temperature sensor configured to measure a first temperature of the ultrasonic medium, a test object temperature sensor configured to measure a second temperature of a test object, and a temperature control device. The temperature control device heats the ultrasonic medium or cools the test object such that the first temperature becomes equal to or higher than the second temperature. Gas bubbles are prevented from emerging on a surface of the test object.
摘要:
The present invention provides a light-emitting body in which fine phosphor particles are dispersed in an oxide matrix, with the fine phosphor particles containing at least one selected from oxides and oxysulfides as a parent material. When this light-emitting body is dispersed in a resin, a resin composition having excellent transparency can be obtained. This light-emitting body can be produced by: preparing a gel through a sol-gel process in which a raw material solution containing a compound that supplies metal atoms composing the fine phosphor particles is used; and heating the gel at 400° C. or higher, for example. Preferably, the light-emitting body has a shape of a flake or fiber.
摘要:
An IC socket equipped with a dust discharge device includes an IC socket body having a plurality of contacts electrically connected in a pressed condition to a plurality of leads of an IC package, and a dust discharge duct mounted on the IC socket body end adapted to allow for the discharge of dust produced or generated from the leads or body of the IC package. An upper end of the dust discharge duct opens adjacent the positions of the leads.
摘要:
A connector for an electric part having a contact shutter device for forming an open state or a closed state of a contact, comprising a finger-like latch member able to be engaged with and disengaged from an electric part, the finger-like latch member being operatively connected to an action of the contact shutter device for displacing a contact in an open state in order to be disengaged from the electric part, the finger-like latch member being operatively connected to an action of the contact shutter device for displacing the contact in a closed state in order to be engaged with the electric part.