Abstract: Optical recording media disclosed herein comprise a substrate and a recording layer formed thereon, wherein the recording layer is irradiated with beam of energy to form thereon bits corresponding to given pieces of information and thereby record the pieces of information. The recording layer comprises Te and Cr, the proportion of Cr contained in said recording layer being 0.1-10 atom % based on the total atoms constituting the recording layer. Processes for preparing the optical recording media disclosed above comprise forming the recording layer comprising Te and Cr on the substrate and then subjecting the thus formed recording layer to heat treatment. Oxidation resistance of said recording layer is improved and accordingly the optical recording medium comprising this recording layer can be expected to prolong its duration of life. This recording layer has excellent recording sensitivity, because the content of Cr in said recording layer is present to 0.

Abstract: A pharmaceutical composition comprising a pyrimidine represented by the following formula ##STR1## wherein R.sup.1 represents a hydrogen atom, an acyl group having 2 to 4 carbon atoms, an alkoxycarbonyl group having 2 to 5 carbon atoms, an alkoxycarbonylmethyl group having 3 to 5 carbon atoms, a 3,4-dimethoxybenzoyl group or a 3,4-methylenedioxybenzyl group,R.sup.2 represents a hydrogen atom, an amino group, a monoalkylamino group having 1 to 4 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an alkoxycarbonyl group having 2 to 4 carbon atoms,R.sup.3 represents a hydrogen atom, an alkoxycarbonyl group having 2 to 4 carbon atoms, a dialkylaminocarbonyl group having 1 to 9 carbon atoms in each alkyl moiety, an alkoxy group having 1 to 5 carbon atoms, or a hydroxyethyl group, R.sup.2 and R.sup.3, together with the carbon atoms to which they are bonded, may form a 5- to 7-membered carbocyclic ring or a heterocyclic ring having N, O or S as the hetero atom, and R.sup.

Abstract: A self-hardenable material comprising a calcium phosphate having an atomic ratio of Ca/P of 1.4 to 1.6, a difficultly water-soluble inorganic fluoride, an organic or inorganic acid and water is provided. For example, when the hardenable material is frilled in the form of slurry or paste in a necessary part in vivo or in the dental cavity, it hardens within a short time to form a stable apatite type product.

Abstract: The present invention relates to thermosetting resin compositions comprising a bismaleimide compound represented by the formula (I) ##STR1## and an aromatic amine resin represented by the general formula (II) ##STR2## and to processes for preparing the same.

Abstract: This invention relates to a novel polyimide and describes method of its preparation, adhesives of the polyimide and the method for their application.The polyimide has recurring units of the formula ##STR1## (where the positions of two carbonyl radicals in a benzene ring are meta or para, and R is a tetra-valent radical selected from the group consisting of aliphatic radical having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).The polyimide can be prepared by reacting diamine with tetracarboxylic dianhydride in organic solvents and imidizing resultant polyamic acid.The diamine in use is ether diamine and includes 1,3-bis[4-(3-aminophenoxy)benzoyl]benzene and 1,4-bis[4-(3-aminophenoxy)benzoyl]benzene.

Abstract: Hydrophilic gelled crosslinked polymers comprising as an essential constituent monomer component a (meth)acrylate ester monomer having a fluorine-substituted hydrocarbon group containing at least three fluorine atoms grafted thereto. The fluorine-containing polymers have excellent oxygen permeability, water swellability, wearing comfort and contamination resistance.

Abstract: An opoxy resin is obtained by reacting an epihalohydrin with an imido-ring-containing diphenol represented by the following formula (I): ##STR1## wherein R represents an aliphatic group having at least two carbon atoms, an alicyclic group, a monocyclic aryl group, a fused polycyclic aromatic group, or a non-fused polycyclic aromatic group formed of aromatic groups coupled together directly or via a linking member and the two hydroxyl groups are each bonded to a meta position or the para position. In the epoxy resin, at least 50% of the hdroxyl groups of molecules of the diphenol have been opoxidized.

Abstract: A novel plasminogen activator having specific properties. The plasminogen activator can be prepared by subjecting a human kidney or human blood vessel to an extraction treatment with an ammonium thiocyanate solution and then allowing the resultant extract to pass through a column of ion exchanger, a metal chelate column, a column of L-arginine or an arginine derivative supported on a carrier, or a column of a carrier having properties as a molecular sieve to purify the same. The plasminogen activator exhibits a strong thrombolytic activity and is useful as an active ingredient of a thrombolytic composition accompanied with a minimum of side effects.

Abstract: A process for detecting a poorly coated portion of an inside surface of a pipe coated with an insulation coat comprises the steps of providing a plurality of pigs on a conductor at predetermined intervals, preparing a running element provided with many electrode needles radially between these pigs, inserting the running element into the pipe while measuring the insulation resistance between the pipe and the conductor, and moving the running element inside the pipe by adjusting the pressure inside the pipe. From the above process, when the electrode needles make contact with a poorly coated portion of the inside surface while the running element is moving inside the pipe, the insulation resistance between the pipe and the conductor is decreased, thereby enabling easy detection of the presence of a poorly coated portion and its position.

Abstract: Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula (I):M.sub.a X.sub.b (I)wherein M means boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.

Abstract: Disclosed is a heat-resistant flame-retardant epoxy resin composition comprising a halogen-containing epoxy resin obtained by reacting a trifunctional epoxy compound having a specific structure with a halogenated bisphenol in the presence of a catalyst. Furthermore, a novel specific trifunctional epoxy compound is disclosed, which is valuably used for the production of the above-mentioned halogen-containing epoxy resin.

Abstract: The invention provides a rubber dispersed copolymer resin having excellent heat resistance, impact strength and moldability and composed of (1) a dispersed phase formed of a rubbery polymer and copolymerized styrene-type, acrylonitrile-type and maleimide-type monomers, said rubbery polymer specificaly controlled occluding the copolymer of monomers, being grafted with the copolymer and/or forming a multicomponent gel together with copolymers, and (2) a continuous phase formed at least of a specifically controlled copolymer of the styrene-type, acrylonitrile-type and maleimide-type monomers. The resin is useful as a molding material for electric appliances, electronic equipment and cars.

Abstract: A novel negative charge color toner composition for electrostatic charge development having good light resistance and copy sharpness which contains, as a dyestuff in a toner resin, a 1-amino-2-phenoxy- or 2-thiophenoxy-4-hydroxyanthraquinone whose phenoxy or thophenoxy group is substituted and/or a 1,4-diamino-2,3-phenoxyanthraquinone whose phenoxy group is substitited, which can be conventionally produced.

Abstract: A method for preparing high-purity bisphenol A which comprises a principal process comprising a first reaction step for reacting phenol with acetone, a first concentration adjusting step, a first crystallization step for precipitating crystals of the adduct of bisphenol A with phenol, a first separation step for separating a solution containing the crystals of the adduct into the crystals and the mother liquor and a phenol removing step for removing phenol from the crystals of the adduct; and a sub-process comprising a second reaction step for reacting p-isopropenylphenol with phenol, a second concentration adjusting step, a second crystallization step, a second separation step for separating a solution containing the second any crystals of the adduct into the second any crystals and the second mother liquor and a cleaving step, the first mother liquor from the principal process being fed to the sub-process and the second any crystals of the adduct from the sub-process being fed to the principal process, is h

Abstract: A damping device has a liquid vessel into which a liquid is injected having a wave motion water surface such that the wave motion direction of the wave motion of the water surface is in the elongated direction of the vessel. Damping members are provided in order to damp the sloshing of liquid in the liquid vessel, and wave dissipation devices are disposed at a portion not always soaked in liquid in the liquid vessel. Accordingly, the vibration of a construction occurring by wind, earthquake and the like is absorbed by the viscosity resistance occurring between the liquid and the damping members, and the vibration is restricted. Moreover, damping performance can be efficiently exercised by providing various installation arrangements.

Abstract: A solid titanium catalyst component (A) of a catalyst system useful in the polymerization of olefins or copolymerization of two or more olefins or one or more olefins and a diene is prepared by contacting a liquid hydrocarbon solution of (i) a magnesium compound, such as magnesium chloride, with (ii) a liquid titanium compound, such as TiCl.sub.4, or a solution of a titanium compound in a hydrocarbon solvent, to form a solid product. The solid product is formed in the presence of (D) an electron donor, e.g. methyl formate, acetic acid, acetic anhydride, acetone, methyl ether, butyl Cellosolve, dimethyl carbonate, methyl silicate. The solid product is also contacted with a polycarboxylic acid ester, e.g. diethyl methylsuccinate. The polymerization or copolymerization of the olefin is carried out in the presence of the solid titanium catalyst (A) and (B) an organometallic compound of a Group I to III metal and (C) an organic silicon compound having an Si--O--C bond.

Abstract: Disclosed herein are novel multivalent metal-modified salicyclic acid resins useful as color-developing agents for pressure-sensitive copying paper. They can each be produced by causing a salicyclic acid ester and a styrene derivative to undergo a Friedel-Crafts reaction in the presence of a strong acid catalyst, hydrolyzing the resulting salicylic acid ester resin, and then reacting the thus-obtained salicyclic acid resin with a multivalent metal salt.

Abstract: Diphenylamines or N,N'-diphenyl-phenylenediamines can be obtained by heat-reacting an aniline or a phenylenediamine with preferably an excess of a phenol in an amount of 4 to 20 moles per mole of the aniline or phenylenediamine in th presence of a hydrogen transfer catalyst and a cyclohexanone corresponding to said phenol.The excess phenol used in the reaction undergoes reduction in the reaction system to form a cyclohexanone, which in turn reacts with the aniline or phenylenediamine to form a Schiff base and is thus consumed. The Schiff base forms the intended product by means of a dehydrogenation reaction, and the hydrogen evolved at this time reduces the phenol to form a cyclohexanone.The phenol present in excess thus becomes in the system a solvent, a starting material for the cyclohexanone, and an acceptor of the hydrogen that forms as a by-product at the time of formation of the intended product.

Abstract: A culturing apparatus including a culturing tank for culturing cells, organs or tissue strips of a plant, internally therein, and a cutting device for cutting cultured plant bodies arranged within the culturing tank, wherein a push-out means for urging the plant bodies against the cutting device is further provided or the cutting means is made movable so as to be urged against the plant bodies.

Abstract: Disclosed herein is an agent for absorbing and releasing water vapor, which comprises a homopolymer of at least one monomer selected from specific N-alkyl- or N-alkylene-substituted acrylamides and methacrylamides, a copolymer of two or more of the acrylamides and methacrylamides, a copolymer of said at least one monomer with one or more monomers other than the acrylamides and methacrylamides and copolymerizable therewith, or a water-insolubilized product of the homopolymer or either one of the copolymers. The above agent has broad utility for humidity control of gases, humidity control in green houses and prevention of fogging on surfaces of transparent materials, as humidity sensors and dew sensors, etc.