摘要:
There is disclosed a process for preparing a 1,2,4-triazole-3-carboxamide represented by the formula: ##STR1## wherein, R.sup.1 and R.sup.2 represent independently a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, or both R.sup.1 and R.sup.2 represent an alkylene group linked with each other directly or through an oxygen atom or a nitrogen atom to form a ring together with the nitrogen atom to which they are attached,which comprises subjecting an oxamohydrazide represented by the formula: ##STR2## wherein R.sup.1 and R.sup.2 have the same meanings as defined above,to reaction with formamidine or a salt thereof.
摘要:
Hydantoin derivatives disclosed in the present application are represented by the formula ##STR1## wherein, R.sup.1 represents a hydrogen atom, an alkyl group of from 1 to 4 carbon atoms, an allyl group, a cyclohexyl group, a benzyl group or a group ##STR2## (where R.sup.2 is an alkyl group of from 1 to 4 carbon atoms, an alkoxy group of from 1 to 4 carbon atoms, a halogen atom or a nitro group, and n is 0, 1, 2 or 3), X.sup.1 is an alkoxycarbonyl group of from 2 to 5 carbon atoms, a benzoyl group, an aliphatic acyl group of from 2 to 5 carbon atoms or a cyano group, and Y is an alkoxycarbonyl group of from 2 to 5 carbon atoms or an aliphatic acyl group of from 2 to 5 carbon atoms. The hydantoin derivatives are useful as agricultural chemicals e.g. bactericides or intermediates thereof.
摘要:
Novel orotic acid derivatives useful as agricultural chemicals or intermediates thereof are disclosed. The orotic acid derivatives are represented by the formula ##STR1## where Me is an alkali metal, R.sup.1 is an alkyl group of from 1 to 4 carbon atoms, an allyl group, a cyclohexyl group, a benzyl group, or a group ##STR2## (where R.sup.2 is an alkyl group of from 1 to 4 carbon atoms, an alkoxyl group of from 1 to 4 carbon atoms or a halogen atom and n is 0, 1, 2 or 3), m is an integer of 1 or 2, and X is a chlorine, bromine or iodine atom or a group --COR.sup.0 (where R.sup.0 is an alkyl group of from 1 to 4 carbon atoms or a phenyl group) when m is 1, and a group --COO.sup.- when m is 2.
摘要:
Triphenylphosphine is produced in a high degree of yield by bringing pressurized hydrogen into contact with a triphenylphosphine dihalide dissolved in a solvent consisting of at least one member selected from monochlorobenzene and dichlorobenzenes.
摘要:
A communication terminal generates a temporary network key based on a managed master network key and on key identification used for security processing on a communication frame. The security processing is performed on the communication frame using the temporary network key. A secure communication frame is produced in which the identification of the key is indicated.
摘要:
A wireless multi-hop network of a communication system is structured with a number of the communication devices and the collecting communication device. Transmission information from each communication devices is sequentially relayed to reach the collecting communication device. Each communication device features a function for on/off control of a transmission/reception processing section. The communication device also includes: a section which appends an urgent flag to urgent information that is to be relayed and transmits the urgent information, and fixes the transmission/reception processing section to ‘on’; a section which verifies a relay by a relay destination communication device and, if verification is achieved, fixes the transmission/reception processing section to ‘on’ and switches to a state for promptly relaying received information; a section which, if the verification is not achieved, retransmits the urgent information; and a section which, when retransmitted urgent information is received, relay-transmits the information immediately.
摘要:
In a conventional data transmission and receipt apparatus using PN flags according to PN sequence, there has occurred a flag emulation due to a bit stream similar to a PN flag in a frame of the data stream, which disables transmission of the frame therebetween. To solve the problem, the data transmission and receipt apparatus of the present invention inserts a mark representing that there is laid a bit stream similar to the PN flag into the frame while the data receipt apparatus distinguishes such a bit stream from the PN flag. Thereby, the data receipt apparatus is capable of receiving the frame involving the bit stream similar to the PN flag without occurrence of a flag emulation.
摘要:
A packaged medical device comprising a medical device; a gas-permeable sterile bag containing the medical device therein; a wrapping member made of oxygen-impermeable material and wherein said medical device-containing bag, previously subjected to radiation-sterilization, is sealed; and a deoxidizing agent contained in the wrapping member together with the medical device-containing bag. The packaged medical device does not give off an odor upon unsealing and is free from decrease in strength of plastic parts thereof.
摘要:
A hydrogen-selective gas sensor comprising a gas-sensing element including a semiconductor in a principal portion thereof, and a thin coat or layer inactive for oxidation of hydrogen formed over an entire surface of the gas-sensing element or at least on a surface of the semiconductor. The thin layer comprises one of silicon oxide, aluminum oxide, and silicon nitride, and is formed on the surface of the semiconductor by chemical deposition, the thin layer checking passage of molecules other than hydrogen molecules.
摘要:
A transmission terminal includes an information generation unit, a transmission unit, a delivery management unit, and a reception unit. The information generation unit generates information that is to be transmitted to a destination reception terminal. The transmission unit transmits information that the information generation unit has generated. The delivery management unit manages transmission of information. The reception unit receives information that the destination reception terminal transmits. Furthermore, the information generation unit generates or receives transmission information that is to be transmitted to the destination reception terminal and generates redundant information for the destination reception terminal to restore the transmission information. The delivery management unit causes the information generation unit to generate, and causes the transmission unit to retransmit, the redundant information when the reception unit has not received a successful reception reply from the destination reception terminal.