Abstract: An epoxy resin composition contains (A) an epoxy resin, (B) a phenolic resin curing agent, (C) a curing catalyst, and (D) an inorganic filler. The catalyst is a quaternary phosphorus compound or a quaternary phosphorus compound which has been mixed and reacted with a phenolic resin having at least two hydroxyl groups. The composition is effectively flowable, moldable and curable and thus suitable for semiconductor encapsulation.

Abstract: An epoxy resin composition comprising an epoxy resin, a curing agent, an inorganic filler, and a curing accelerator is suited for semiconductor encapsulation. A specific organic phosphorus compound is used as the curing accelerator. The composition is smoothly flowing, stable during storage, effectively curable and mold releasable and can be molded and cured into products free from wire flow and voids.

Abstract: Provided is a process for the preparation of an optically active (R)- or (S)-1-aminophosphonic acid derivative of the general formula (Ia) or (Ib) given below, which process comprises reacting an amino-protected imine having general formula (II): R.sup.1 --N.dbd.CHR.sup.2 where R.sup.1 is diphenylmethyl group or the like and R.sup.2 is an alkyl group or the like, with a phosphonic acid ester in the presence of an asymmetric catalyst consisting of a rare earth element-alkali metal-binaphthol complex, to produce an (R)- or (S)-N-protected-1-aminophosphonate compound, and then subjecting the phosphonate compound to catalytic reduction with hydrogen and to acidic hydrolysis. ##STR1## There are also provided novel intermediates, and a process of preparing an asymmetric catalyst consisting of a rare element-alkali metal-binaphthol complex.

Abstract: A 1-phenyl, naphthyl or aralkyl-4-(N,N-di-substituted carbamoyl)-1,2,4-triazol-5-one derivative represented by the general formula (I) ##STR1## wherein A is an unsubstituted or substituted phenyl group, 1-naphthyl group, 5,6,7,8-tetrahydro-1-naphthyl group or an aralkyl group such as an unsubstituted or substituted benzyl group and so on, R.sub.1 is a lower alkyl group and so on, and R.sub.2 is an unsubstituted or substituted phenyl group and so on, was prepared as novel compounds. This 1-substituted-4-carbamoyl-1,2,4-triazol-5-one derivative does not substantially exhibit phytotoxicity to various agricultural crop plants and therefore is useful as a selective herbicide.

Abstract: An exhaust gas purifying catalyst capable of exhibiting excellent catalytic purifying activity in long term use under high temperatures exceeding 900.degree. C., the exhaust gas purifying catalyst comprising a heat-resistant oxide which is expressed by the following general formula:AMn.sub.x Al.sub.12-X O.sub.19(where A represents an alkaline earth metal which can be substituted by an alkali metal and/or a rare earth element, and x represents an atomic ratio of 0.5 to 4) and a noble metal.

Abstract: A disinfectant composition comprising as active ingredients 4-(2,2-difluoro-1,3-benzo-dioxol-4-yl)pyrrole-3-carbonitrile and penta-4-enyl-N-furfuryl-N-imidazol-1-ylcarbonyl-DL-homoalaninate exhibits high synergistic effect by the joint use of the two active ingredients and has remarkably high effect in a low amount against Bakanae disease, blast, leaf spot, loose smut, Septoria leaf blight, snow mold on cereals such as rice, wheat, barley etc.

Abstract: In this invention, a new microbial strain which is a strain of Actinomycetes and belongs to the genus Actinomadura, namely Actinomadura sp. MI215-NF3 strain is cultured, and MI215-NF3 substance, a novel antibiotic classifiable as a polyether antibiotic, is recovered from the resultant culture. MI215-NF3 substance and its salts obtained according to this invention are useful for therapeutic treatment of chicken coccidiosis and also have useful antibacterial activities against certain species of bacteria.

Abstract: A sustained release pesticide comprises solid pesticidal particles comprising a solid, pesticidally active ingredient, substantially the whole surface of the pesticidal particles being coated with a hydrophobic substance.

Abstract: There are disclosed novel 1,3-dibenzyl (or diphenethyl)-2-phenylguanidine derivatives. The guanidines possess high control effects on mildew, blight, powdery mildew and rust which are serious diseases of fruit trees, vegetables or cereals, and are useful as agricultural and horticultural fungicides.

Abstract: Imidazole derivatives which were provided as the new compound according to this invention and are represented by the formula: ##STR1## wherein R.sub.1 denotes a hydrogen atom or a lower alkyl group, R.sub.2 denotes a lower alkyl group, R.sub.3 denotes an alkenyl group, a cycloalkyl group, an alkoxyalkyl group or a higher alkyl group, R.sub.4 denotes a hydrogen atom or a lower alkyl group, and X denotes an oxygen atom or a sulfur atom, exhibit excellent antibacterial and antifungal activities against various kinds of microorganisms pathogenic to plants. The new imidazole derivatives according to this invention are useful especially as an agent for disinfecting the seeds.

Abstract: An alumina silica sintered ceramic that is produced by the normal sintering method and which has bending strength of at least 300 MPa at room temperature and at least 400 MPa at an elevated temperature, for example, 1,300.degree. C. is disclosed.This sintered ceramic is produced by a process comprising the following steps: providing a chiefly amorphous starting powder that consists of 62-73 wt % Al.sub.2 O.sub.3 and correspondingly 38-27 wt % SiO.sub.2 ; calcining this starting powder to make a calcined product that is chiefly composed of a crystalline phase and which contains oxides of an alkali metal and an alkaline earth metal in a total amount of no more than 1,500 ppm; pressing the ground particles of the calcined product into a compact; and sintering the compact at 1,500.degree.-1,750.degree. C. and at atmospheric pressure.

Abstract: As new compound are provided alkyl 1,3-dithiol-2-ylidene-alkylsulfonylacetates which are useful as fungicidal agent and agent for therapeutically treating or preventing a liver disorder as well as agent for reducing the internal fat deposit or preventing excessive accumulation of the internal fat deposit in the body of animals, including humans. These new compounds have improved activities for these applications, as compared to known similar compounds.

Abstract: A quaternary phosphonium hydroxide, which is represented by the following general formula (II): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 mean independently an alkyl group having 1-8 carbon atoms, a phenyl group or a benzyl group, is prepared by dissolving a quaternary phosphonium halide represented by the following general formula (I): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 has the same meaning as defined above and X denotes a chlorine, bromine or iodine atom, in a solvent selected from water, lower alcohols and aqueous lower alcohols, and then bringing the resultant solution into contact with a strongly basic anion exchange resin (OH-form).

Abstract: As compounds is provided a pyrazole derivative of the formula ##STR1## wherein R.sub.1a, R.sub.1b and R.sub.1c are each a hydrogen atom, a halogen atom, a nitro group, an amino group, a (lower) alkyl group, a halo-(lower)alkyl group, a(lower)alkenyl group, a (lower)alkynyl group, a (lower)alkylcarbonylamino group, a (lower)alkoxycarbonylamino group, a mono-(lower) alkylaminocarbonylamino group or a di-(lower)alkylaminocarbonylamino group;R.sub.2 is a hydrogen atom, a (lower)alkyl group, a (lower)alkenyl group, a (lower)alkynyl group, a (lower) alkoxy(lower)alkyl group, a (lower)alkylthio(lower)alkyl group, a (lower)alkylcarbonyl(lowr)alkyl group, a (lower) alkoxycarbonyl(lower)alkyl group, a (lower)alkylthiocarbonyl(lower)alkyl group, a cyano(lower)alkyl group, a (lower)alkylsulfonyl group, phenylsulfonyl group, a halogen-substituted phenylsulfonyl group or a (lower) alkyl-substituted phenylsulfonyl group, andX and Y are the same or different and each are a halogen atom.

Abstract: New tetraarylboron-ammonium complexes having the general formula: ##STR1## wherein R.sub.1 represents a hydrogen or a halogen atom or a lower alkyl group; R.sub.2 represents a halogen atom or a lower alkyl or a lower alkenyl group; and R.sub.3 represents a heterocyclic amine are provided as active ingredient of anti-fouling paint and also of antiseptic, antifungal agent. These compounds exhibit remarkably long-lasting anti-fouling activities against substantially all kinds of aquatic organisms including slimes with acceptably low toxicity against human beings and also exhibit high antimicrobial activities against various fungi, bacteria and yeasts.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as herein defined useful as insecticides, is described.

Abstract: A new 1,2,4-triazole compound is now provided, which is represented by the general formula ##STR1## wherein X may be the same or different and denotes a halogen atom, a (C.sub.1 -C.sub.4)alkyl group, a (C.sub.1 -C.sub.4)alkoxyl group, a (C.sub.1 -C.sub.4)alkylthio group, a (C.sub.1 -C.sub.4) alkylsulfinyl group, a (C.sub.1 -C.sub.4)alkylsulfonyl group, a trifluoromethyl group, a nitro group or a cyano group;n is an integer of 0 to 5;R denotes a (C.sub.1 -C.sub.4)alkyl group, a (C.sub.2 -C.sub.4)alkenyl group, a (C.sub.2 -C.sub.4)alkynyl group, a (C.sub.1 -C.sub.4)alkoxy-(C.sub.1 -C.sub.4)alkyl group, a (C.sub.1 -C.sub.4)alkylthio-(C.sub.1 -C.sub.4)alkyl group, a (C.sub.3 -C.sub.6)cycloalkyl group, a (C.sub.3 -C.sub.6)cycloalkyl-(C.sub.1 -C.sub.4)alkyl group, a substituted or unsubstituted phenyl group, or a phenyl(C.sub.1 -C.sub.4)alkyl group of which the phenyl may optionally bear up to three substituents,Y denotes an oxygen atom or a sulfur atom; andZ denotes a linear or branched (C.sub.1 -C.sub.

Abstract: A new improved process of producing a rare earth metal alkoxide is now provided, which comprises reacting a rare earth metal carboxylate with an alkali metal alkoxide in an inert organic solvent under anhydrous conditions, and which can be conducted in a facile way and give the desired rare earth metal alkoxide of a high purity in a high yield.

Abstract: This invention relates to new thiophene derivatives and their use as fungicides in agriculture and horticulture.

Abstract: New 2-(substituted-phenoxy)propionic acid derivatives are provided, which have the structure of the general formula: ##STR1## and R.sub.2 is a hydrogen atom or a lower alkyl group. They have a high herbicidal activity to weeds, particularly graminaceous weeds, while they have little or no phytotoxicity to broad leaved crop plants and are therefore useful as selective herbicide.