摘要:
Provided are DTPA derivatives having five carbonyl groups, represented by the following formula (1). Further provided is a process for synthesizing a compound (1a) represented by the formula of a compound (1) in which R.sub.2 is 2-alkenyl group (R.sub.4). The process comprises the steps of performing esterification of DTPA, introducing an alkoxycarbonyl group and reacting with 2-alkenyl alkoxyformate in the presence of a palladium catalyst, thereby obtaining the compound (1a). ##STR1##
摘要:
An ink ribbon comprising a base film and an ink layer having a thickness of from 1 to 10 .mu.m and containing a particle form infrared ray-emitting fluorescent substance having excellent light emitting characteristics.
摘要:
A system for controlling an automobile transmission effects a gear change by disengaging synchronizing clutch means for a present gear position, achieving a neutral gear position, and then engaging a synchronizing clutch for a next gear position in response to a shift control signal. The automobile transmission has an actuator for selectively engaging and disengaging the synchronizing clutch. An electronic control unit controls an engine output adjusting assembly to adjust the output power of the engine and also controls the actuator to start disengaging the synchronizing clutch for a present gear position in response to a shift command signal. The electronic control unit also controls the actuator to complete disengaging the synchronizing clutch for a present gear position to enter the neutral gear position when substantially no load is transmitted between drive and driven members of the synchronizing clutch for a present gear position under the control of the engine output adjusting assembly.
摘要:
An aqueous coating composition which includes, as essential components thereof, (A) an acrylic resin emulsion, (B) a urethane resin emulsion, (C) a crosslinking agent and (D) an acidic phosphate or phosphite ester.
摘要:
A magnetic recording medium with good durability and electromagnetic conversion properties which comprises a substrate and a magnetic layer formed thereon containing magnetic powder and a binder component which comprises a glycidyl group-containing binder resin and a phosphated binder resin such that the dispersability of the magnetic powder in the binder component is enhanced.
摘要:
A magnetic tape cassette is provided with a pivotal closure lid pivotably secured to both sides of a casing for movement between a closed position, in which the front opening of the casing, through which a magnetic tape is accessible for loading onto a rotary head, is covered, and an open position wherein the closure lid is pivoted away from said opening to expose the tape while the cassette is in use. The magnetic tape cassette is also provided with a sliding closure member slidably mounted on the bottom of the casing and cooperative with the aforementioned pivotal closure lid. The sliding closure member is in a closed position while the pivotal closure lid is in its closed position, in which it covers a bottom clearance through which a device constituting part of a tape holding system is inserted, and in an open position while the pivotal closure lid is in its open position to allow the aforementioned device of the tape handling system to reach into the casing through the bottom clearance. A locking pin holds the sliding closure in the current one of its two positions. The sliding closure holds the pivotal closed while in its own closed position.
摘要:
A magnetic tape cartridge comprising a main case made of a resinous material selected from a copolymer comprising repeating units derived from a nitrogen-containing heterocyclic compound and a blend containing a homo- or co-polymer comprising repeating units derived from a nitrogen-containing heterocyclic compound, which has good heat resistance and suffers from less deformation at a high temperature. The content of the nitrogen-containing compound in the copolymer or blend is from 5 to 30% by weight.
摘要:
A feather-touch mode changer having low power requirements and being capable of selectively providing a plurality of modes of operation of a tape recording/reproducing apparatus, has two changing mechanisms which are each of the type that includes a rotatable changing gear with a toothless gap, a selectively actuable trigger for causing initial angular displacement of the changing gear from an inactive position in which the toothless gap faces a drive gear to an actuating position in which the changing gear engages the drive gear, and an actuating lever that moves in a response to the rotation of the changing gear by the drive gear. The two changing mechanisms are selectively actuable, and a single drive gear is positioned for engagement with both changing gears. Each of the two changing mechanisms has associated with it a selectively energizable electromagnetic device and a locking lever that moves into a locking position in response to movement of the respective actuating lever. Each electromagnetic device is energized upon actuation of the respective trigger means to magnetically hold the respective locking lever in its locking position. The mode changing apparatus also includes mode establishing mechanisms comprising a plurality of cooperating gears and levers that are engaged by the actuating and locking levers upon selective operation of the changing mechanisms to establish FWD, FF, REW, PAUSE and ADS (Automatic Detection of Silence) modes of operation of the tape recording/reproducing apparatus.
摘要:
A coating composition having high dirt prevention properties and improved adhesiveness to hydrophobic surfaces such as those made of a plastic, and a coating method are provided. More specifically, provided is a coating composition, including: hydrophobic resin particles dispersed in an aqueous medium; hydrophilic inorganic fine particles; and an oxidizing agent containing at least one of a peroxide, a perchloric acid, a chlorate, a persulfuric acid, a superphosphoric acid, and a periodate, and also provided is a coating method including the steps of: preparing a first agent having hydrophilic inorganic fine particles and hydrophobic resin particles dispersed in an aqueous medium; preparing a second agent by adding, to the first agent, an oxidizing agent containing at least one of a peroxide, a perchloric acid, a chlorate, a persulfuric acid, a superphosphoric acid, and a periodate; applying the second agent onto a member to be coated; and drying the second agent on the member to be coated.
摘要:
The fuel cell of the invention includes an electrolyte assembly, and a separator having one face as a gas flow path-forming face with a gas flow path formed thereon to allow flow of a reactive gas and the other face, which is reverse to the one face, as a refrigerant flow path-forming face with a refrigerant flow path formed thereon to allow flow of a refrigerant. The gas flow path-forming face of the separator has multiple linear gas flow paths that are arranged in parallel to one another, and a gas flow path connection structure that divides the multiple linear gas flow paths into plural linear gas flow path groups and connects at least part of the plural linear gas flow path groups in series. The refrigerant flow path-forming face has multiple linear refrigerant flow paths that are formed as a reverse structure of the multiple linear gas flow paths on the gas flow path-forming face, and a refrigerant flow path connection structure that is formed as a reverse structure of the gas flow path connection structure on the gas flow path-forming face to connect the multiple linear refrigerant flow paths in parallel.