摘要:
An antitumor agent comprising a combination of 5-fluorocytosine and cytosinedeaminase has been developed. As to the practical administration procedure of the agent, it is preferable to carry out in such a manner that 5-fluorocytosine is first administered in any portion of the body, and cytosinedeaminase is then administered into the topically suffered portion. The administered 5-fluorocytosine is transferred into the suffered portion, and the 5-fluorocytosine is affected with the action of cytosinedeaminase to convert the former compound into 5-fluorouracil, resulting in that the necrosis of the tumor tissue is caused.
摘要:
Novel 3(2H)-pyridazinone derivatives of the formula (I): ##STR1## wherein, X represents a halogen, an alkyl, a haloalkyl, a haloalkoxy atoms, NO.sub.2, an alkoxy or ##STR2## (wherein, R represents an alkyl); n is 1 to 4;A represents hydrogen, a halogen, an alkyl or an alkoxy;B represents CX.sub.1 (wherein, X.sub.1 represents H or a halogen) or N;R.sup.1 and R.sup.2 represent each independently H or an alkyl;E represents H, a halogen, an alkoxy or --OH; andQ represents: ##STR3## (wherein, Y represents a halogen, an alkyl, an alkoxy, a haloalkyl, a haloalkoxy, CN, ##STR4## (wherein, Z represents a halogen, an alkyl, an alkoxy or a haloalkyl atoms, and l is 0, 1 to 5, said Z being the same or different when l is 2 to 5); and m is 1 to 5, said Y being the same or different when n is 2 to 4. A process for preparation of said derivatives is also provided. These derivatives are useful as an active ingredient of insecticidal composition.
摘要:
Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material. In the recrystallization step, the aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring such that the aqueous slurry becomes uniform, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized and modified dihydrate gypsum from the recrystallization reaction tank are controlled such that the feed rate and the discharge rate become substantially equal to each other, whereby the feeding of the hemihydrate gypsum and the discharging of the recrystallized and modified dihydrate gypsum are conducted continuously or intermittently. According to the process, dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum although such modified dihydrate gypsum is not available in general.
摘要:
There is provided a composition for forming anti-reflective coating for anti-reflective coating that has a good absorption of light at a wavelength utilized for manufacturing a semiconductor device, that exerts a high protection effect against light reflection, that has a high dry etching rate compared with the photoresist layer. Concretely, the composition for forming anti-reflective coating contains a triazine trione compound, oligomer compound or polymer compound having hydroxyalkyl structure as substituent on nitrogen atom.
摘要:
Novel 3(2H)-pyridazinone derivatives having the general formula (I): ##STR1## wherein, R denotes a straight or branched C.sub.1 to C.sub.6 alkyl; A denotes a straight or branched C.sub.1 to C.sub.6 alkyl or a halogen; X denotes oxygen or sulfur atom; Q denotes a group; ##STR2## when A is a straight or branched C.sub.1 to C.sub.6 alkyl, and Q denotes a group: ##STR3## when A is a halogen atom; R.sup.1 and R.sup.2 denote each independently hydrogen, a lower alkyl, a lower haloalkyl, or 4-tert-butylphenyl; B denotes --CR.sup.6 .dbd.CR.sup.7 --, --CR.sup.6 R.sup.7 O--, or ##STR4## (wherein, R.sup.6 and R.sup.7 denote various specific organic radicals. A process for preparation of said derivatives is also provided. These derivatives are useful as an active ingredient of insecticidal, acaricidal, nematicidal and/or fungicidal compositions for agricultural and horticultural uses as well as of expellent compositions for ticks parasitic on animals.
摘要:
There is provided a composition for forming anti-reflective coating for anti-reflective coating that has a good absorption of light at a wavelength utilized for manufacturing a semiconductor device, that exerts a high protection effect against light reflection, that has a high dry etching rate compared with the photoresist layer. Concretely, the composition for forming anti-reflective coating contains a triazine trione compound, oligomer compound or polymer compound having hydroxyalkyl structure as substituent on nitrogen atom.
摘要:
The present invention provides a nitrogen-containing cyclic compound represented by the formula (1): ##STR1## wherein R.sup.1 represents an alkyl group; R represents a hydrogen atom or an alkyl group; X represents an oxygen or sulfur atom or NR.sup.3 ; Q.sup.1 represents a hydrogen atom, or an alkyl, cycloalkyl, alkenyl or alkynyl group or a phenyl, naphthyl or heterocyclic group etc.; Q.sup.2 represents an alkyl, cycloalkyl or alkenyl group, or a phenyl or thienyl group etc.; A.sup.1 represents a carbon or nitrogen atom; A.sup.2 represents CR.sup.2 or NR.sup.2, or an oxygen or sulfur atom, or SO or SO.sub.2 ; A.sup.3 represents a single bond, or an oxygen or sulfur atom, or CR.sup.5 or NR.sup.5) and a herbicide comprising the same, which herbicide exhibits very high herbicidal activity at very low application rate and has selectivity against crops.
摘要:
A 3(2H)-pyridazinone derivative of the general formula (I): ##STR1## wherein R is a straight or branched C.sub.2 -C.sub.6 alkyl,A is a straight or branched C.sub.1 -C.sub.6 alkyl or a halogen atom,X is --O-- or --S--,R.sup.1 and R.sup.2 are each independently hydrogen atom or C.sub.1 -C.sub.3 alkyl,B is --CH.dbd.CH--, --N.dbd.CH--, --N.dbd.N--, --S--, --O-- or ##STR2## wherein R.sup.3 is hydrogen or C.sub.1 -C.sub.3 alkyl, Y is a halogen atom, a straight or branched C.sub.1 -C.sub.6 alkyl, a C.sub.3 -C.sub.6 cycloalkyl or cycloalkoxy, and other substituents,n is 0 or an integer of 1 to 3, and when n is 2 or 3, Y may be same or different, with the proviso that when B is --CH.dbd.CH--, n is an integer of 1 to 3 and at least one of Y is --O--W, as this term is defined in the specification.A process for the preparation of said derivatives is also provided. These derivatives are useful as an active ingredient of insecticidal, acaricidal, nematicidal and/or fungicidal compositions for agricultural and horticultural uses as well as of expellent compositions for ticks parasitic on animals.
摘要:
A herbicidal composition which comprises an adjuvant and an active ingredient of heterocyclic ether type phenoxy fatty acid derivative having the formula ##STR1## wherein A represents --CH-- or --N--; X represents a halogen atom; n is 0, 1 or 2; R.sup.1 represents a hydrogen atom; a lower alkyl group; R.sup.2 represents --OH; --O-alkyl group; --OM group (M is an inorganic or organic salt moiety); ##STR2## --O-lower alkenyl group; --O-benzyl group; --O-lower alkylalkoxy group; --O-phenyl; --O-cyclohexyl, --O-halogenoalkyl, --O-lower alkynyl and --O-cyanoalkyl; R.sup.3 and R.sup.4 respectively represent a hydrogen atom or a lower alkyl group.
摘要:
Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material. In the recrystallization step, the aqueous slurry in a recrystallization reaction tank is maintained at a constant temperature under stirring such that the aqueous slurry becomes uniform, and a feed rate of the hemihydrate gypsum to the recrystallization reaction tank and a discharge rate of the recrystallized and modified dihydrate gypsum from the recrystallization reaction tank are controlled such that the feed rate and the discharge rate become substantially equal to each other, whereby the feeding of the hemihydrate gypsum and the discharging of the recrystallized and modified dihydrate gypsum are conducted continuously or intermittently. According to the process, dihydrate gypsum as a starting raw material can be converted into high-purity, modified dihydrate gypsum of large crystals by recrystallizing the starting dihydrate gypsum after it is once calcined into hemihydrate gypsum although such modified dihydrate gypsum is not available in general.