Abstract: Disclosed is a method of culturing protoplasts in a liquid medium. According to the method, the protoplasts are cultured in a liquid medium layer having a thickness of about 100 to about 400 .mu.m.

Abstract: Concrete/mortar is manufactured with a small amount of water by using fine polymer particles containing frozen water. The water becomes available when the particles thaw or the particles may be used directly without freezing.

Abstract: The present invention relates to a matt film comprising a paper and a poly-4-methyl-1-pentene film laminated at least one side of the paper, wherein said poly-4-methyl-1-pentene film has an average surface roughness R.sub.a in the range of 0.5 to 10 .mu.m.The matt film is suitably applicable to the preparation of cladding panels for multi-layer printed circuit boards.

Abstract: Separation of tPA and undesired proteins is securely and effectivity accomplished by using a cation-exchanger in the two step procedure for selective elution of undesired proteins from the cation-exchanger on which tPA and undesired proteins are adsorbed: undesired proteins having the pI equivalent to or lower than that of tPA was eluted out in the first step and then undesired proteins having the pI equivalent to or higher than were eluted in the second step.

Abstract: Polyisocyanato-isocyanurate and mixture of the same obtained by trimerizing straight chain aliphatic diisocyanate represented by the formula:OCN--R.sub.4 --NCOwherein R.sub.4 is an alkylene group having 2-12 carbon atoms and polycyclo-aliphatic diisocyanate represented by the formula: ##STR1## wherein k is an integer of 0 to 2, j and m are integers of 1 to 5, and h is an integer of 0 to 2; powder-paint curing agent which contains blocked isocyanate obtained by reacting the above raw materials with a blocking agent having at least one active hydrogen in a molecule; non-yellowing urathane paint resin prepared from the above raw materials and compound having at least two active hydrogen in a molecule; and paint composition comprising the curing agent and the resin; is disclosed.

Abstract: Disclosed is a resin composition for ultraviolet luminescent screen comprising one or more of luminescent compound represented by the formula (I): ##STR1## wherein X is ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually a hydrogen atom, halogen atom, alkyl, alkoxy, amino, alkylamino, dialkylamino, anyl or aralkyl, and Y is perfluoroalkyl, and A.sup.+ is a cation represented by the formula (II): ##STR3## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are individually a hydrogen atom, alkyl or aralkyl and may be combined with each other to form a ring, or a pyridium cation which may have a substituent, or a phosphonium cation.

Abstract: A process for producing polypropylene, which comprises preliminarily polymerizing 3-methylbuten3-1 in the presence of a catalyst system formed from[A] a solid titanium catalyst component containing magnesium, titanium, halogen and polycarboxylic acid esters as essential components,[B] an organoaluminum compound, and[C] an organosilicon compound represented by the general formula R.sub.n Si(OR').sub.4-n wherein R and R' represent a hydrocarbon group, and 0<n<4, the amount of the 3-methylbutene-1 preliminarily polymerized being 0.1 to 100 g per gram of the solid titanium catalyst, and thereafter, polymerizing propylene or copolymerizing propylene and an alpha-olefin in the presence of the catalyst used in the preliminary polymerization to such an extent that the amount of the monomer or monomers polymerized is from 1,000 to 100,000 times the amount of the 3-methylbutene-1 preliminarily polymerized.

Abstract: A polymer of 4-methylpentene-1 having a substantially syndiotactic structure, which polymer contains 0 to 30 mol % of the .alpha.-olefin unit other than the 4-methylpentene-1 unit and has excellent physical properties.

Abstract: This invention relates to molding resin compositions, and more particularly relates to polyimide resin compositions having markedly improved molding ability in addition to excellent high temperature stability, chemical resistance and mechanical strength.The polyimide resin compositions of this invention comprises 99.9 to 50.0% by weight of the polyimide and 0.1 to 50.0% by weight of polyphenylene sulfide and/or aromatic polysulfone and/or aromatic polyetherimide high-temperature engineering polymer.

Abstract: A vehicular lock device comprises a main latch engageable with a main striker and rotatable, a main ratchet engageable with the main latch in order to keep an engagement relation between the main latch and the main striker, a subsidiary latch adapted to engage with a subsidiary striker and rotate, a subsidiary ratchet adapted to engage with the subsidiary latch in order to sustain an engagement relation of the subsidiary latch with the subsidiary striker, and a rotation lever engageable with the main latch and rotatable correspondingly to rotation of the main latch. Both the latches, both the ratchets, and the rotation lever, respectively are journalled rotatably to the same body of the lock device. When the latch engages with the main striker and the former rotates, the rotation lever rotates so as to make the subsidiary ratchet released from the subsidiary latch.

Abstract: Melt moldable polyamide-imide resins are disclosed which have a glass transition temperature ranging from 120.degree. to 300.degree. C. and have molecule ends blocked with an unsubstituted aromatic group or an aromatic group having a substituent not reactive with amines, isocyanates, carboxylic acids and dicarboxylic acid anhydrides.

Abstract: A method of manufacturing manganese dioxide containing 0.05 to 2.0 parts by weight of phosphorus which consists of introducing a manganese sulfate solution and sulfuric acid as an electrolyte into an electrolytic cell, adding to said electrolyte at least one member selected from the group consisting of phosphoric acid, phosphorous acid, hypophosphorous acid and compounds thereof and carrying out the electrolysis at a bath temperature of 92.degree. to 100.degree. C. whereby manganese dioxide containing phosphorus is electrodeposited on the cathode.

Abstract: Herein provided are a method for preparing 1,1,2,2-tetrakis(4-hydroxy-3,5-dimethylphenyl)ethane (TKXE) comprising subjecting two molecules of bis(3,5-dimethyl-4-hydroxyphenyl) methane to dehydration-condensation under oxidizing conditions, an epoxy resin prepared by epoxidating TKXE obtained by the method and an epoxy resin composition comprising TKXE obtained by the method as a hardener and an epoxy resin as well as methods for preparing the resin and composition. The method makes it possible to prepare highly pure TKXE in the form of crystals. Moreover, the epoxy resin and the epoxy resin composition can provide hardened products excellent in physical properties such as heat resistance and mechanical strength.

Abstract: A monochloro-substituted aliphatic alcohol containing 3-8 carbon atoms, a copper compound and a zinc compound are added to maleic anhydride to prevent discoloration of the maleic anhydride. Deterioration of the quality of the maleic anhydride can be inhibited when it is stored for a long period of time or heat-melted.

Abstract: A catalyst for producing maleic anhydride by oxidation of n-butane comprising V,P and additionally Mg or Zr is prepared by(a) heating a pentavalent vanadium compound in an organic medium to reduce at least a part of the pentavalent vanadium to tetravalent vanadium,(b) reacting the resulting vanadium compound with phosphoric acid in the presence of at least one of a magnesium compound and a zirconium compound to form a catalyst precursor,(c) separating the resulting catalyst precursor from the organic medium, and(d) drying and calcining the catalyst precursor.

Abstract: In accordance with the present invention, there are provided carrier-supported titanium catalyst components containing magnesium, aluminum, halogen and titanium as essential ingredients, which are obtained by a reaction of[I] a magnesium containing support obtained by previously bringing a support into contact with an organometallic compound of a metal of the Group II to IIIA of the periodic table having at least one hydrocarbon group attached directly to the metal atom or with a halogen containing compound, followed by contact with a magnesium compound in the liquid state having no reducing ability,[II] a reducing organometallic compound, and[III] a titanium compound in the liquid state, and processes for preparing the same and, at the same time, catalysts containing the above-mentioned catalyst components for use in preparing ethylene polymer and processes for preparing ethylene polymer using the catalyst for use in preparing ethylene polymer.

Abstract: A vehicular door lock device having a latch and ratchet mechanism comprises a sill knock lever connected to a lock button on a door interior so as to change its position between the locked one and the unlocked one, a key lock lever connected to a key cylinder of the door and to the sill knob lock lever through lost-motion, an actuator changing the position of the sill knob lock lever to its unlocked one and the locked one, an opening lever connected to the door opening handle, and an operating rod connected to the sill knob lock lever and the opening lever. A body of the lock device has a swelled portion formed on its rear side in order to define a guide groove a striker fixed to the car body proceeds therethrough. The key lock lever is rotatably installed in a room exterior side of a central line of the body and the sill knob lock lever is placed at a side of the key lock lever and at a room interior of the central line of the body.

Abstract: By dispersing and polymerizing at least one N-alkyl-or N-alkylene-substituted (meth)acrylamide or a mixture of at least one N-alkyl- or N-alkylene-substituted (meth)acrylamide and other copolymerizable monomer is an aqueous inorganic salt solution having inorganic particulates suspended, there is provided a preparation process of granular polymers containing no impurities such as polymer stabilizers, surface active agents, etc. The granular polymers are useful as concentrating agents, slow releasing base materials, etc.

Abstract: A ceramic filter used for filtering molten metal, particularly molten aluminum, made by sintering the composition comprising 90 parts by weight of electrofused alumina for an aggregate and 5 to 15 parts by weight of an inorganic binder. The inorganic binder comprises 5 to 15 wt % of B.sub.2 O.sub.3, 15 to 50 wt % of MgO, 3 to 10 wt % of SiO.sub.2 and the remainder Al.sub.2 O.sub.3.

Abstract: The present invention relates to solid catalyst components for olefin polymerization formed by prepolymerizing at least two types of .alpha.-olefin on an olefin polymerization catalyst comprising a solid titanium catalyst component, an organometallic compound catalyst component, and if necessary, an electron donor, to olefin polymerization catalyst comprising said solid catalyst component for olefin polymerization, an organometallic compound catalyst component, and if necessary, an electron donor, and to processes for olefin polymerization using said olefin polymerization catalyst.According to the present invention, there can be manufactured olefin polymer particles having low adhesive among the polymer particles as well as good particle distribution and excellent granular properties even when they contain a large amount of an amorphous olefin polymer portion.