Abstract: We have found a novel subtype DRw14c and sequenced the nucleotide sequence thereof. DRw14 associated genes can be genetically typed at the DNA level using DRB1-14c sequence specific oligonucleotide probes such as F142 and F144 of the invention. The present invention overcomes the disadvantages of serological typing and provides a reagent that determines a type of a HLA-DR antigen. More specifically, the invention provides an oligonucleotide probe capable of identifying subtypes of a HLA-DR antigen precisely and a reagent containing the oligonucleotide probe. Furthermore, the invention provides a method of detecting a novel HLA-DR antigen.

Abstract: An ethylene copolymer composition comprising an ethylene/.alpha.-olefin copolymer obtained by using a catalyst for olefin polymerization containing an organoaluminum oxy-compound (a) and at least two kinds of specific metallocene compounds (b), and a low-density polyethylene obtained by high-pressure radical polymerization.The ethylene/.alpha.-olefin copolymer compositions of the invention are excellent in moldability. From these copolymer compositions, films having high transparency and high mechanical strength can be produced.

Abstract: A method for producing aromatic carboxylic acids which comprises oxidizing a starting compound selected from the group consisting of alkyl substituted aromatic hydrocarbons and partially oxidized alkyl substituted aromatic hydrocarbons with a molecular oxygen containing gas in the presence of at least one additive selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons, aliphatic alcohols, alicyclic alcohols, aldehydes, carboxylic acids and ketones and in the presence of a catalyst comprising a heavy metal compound and a bromine compound in a reaction solvent. The aliphatic alcohols, alicyclic alcohols, aldehydes, carboxylic acids and ketones have ten to thirty carbon atoms in the molecule.

Abstract: A method of removing adsorbates on a polyester bottle, the body of the bottle having a mean crystallinity of 32 to 70%, a methanol adsorption of 1,500 ppm or less and a paraxylene adsorption of 300 ppm or less. As a result, the bottle has excellent non-adsorptivity and heat resistance. According to the method, the adsorbates can be rapidly desorbed by holding the bottle in air of 40.degree. to 150.degree. C. or bringing the bottle into contact with water or water vapor heated at 40.degree. to 150.degree. C.

Abstract: A novel carbonate compound represented by the general formula [I]:R.sup.1 CH.sub.2 O--CO--OCH.sub.2 R.sup.2 [I]wherein R.sup.1 represents a hydrogen atom, an alkyl group or an alkyl group substituted with one or more halogen atoms, and R.sup.2 represents an alkyl group having no hydrogen atom at the .alpha.-position thereof or an alkyl group substituted with one or more halogen atoms having no hydrogen atom at the .alpha.-position thereof, with the proviso that R.sup.1 is not identical to R.sup.2, which has excellent properties as solvent, is disclosed. A non-aqueous electrolytic solution and a battery utilizing the novel carbonate compound are also disclosed.

Abstract: The novel transition metal compound of the invention is represented by the following formula (I): ##STR1## wherein M is a transition metal; R.sup.1 is a hydrocarbon group of 2 to 6 carbon atoms, R.sup.2 is an aryl group of 6 to 16 carbon atoms; X.sup.1 and X.sup.2 are each a halogen atom or the like; and Y is a divalent hydrocarbon group, a divalent silicon-containing group or the like. An olefin polymerization catalyst component of the present invention comprises the aforementioned transition metal compound. An olefin polymerization catalyst of the present invention comprises the aforementioned olefin polymerization catalyst component. The propylene homopolymer, the propylene copolymer and the propylene elastomer according to the present invention have such properties that the triad tacticity of propylene units chain is high, a proportion of the inversely units based on the 2,1-insertion of propylene monomer is in the specific range, and the intrinsic viscosity [.eta.

Abstract: A random copolymer characterized in that (A) the copolymer comprises polymerized units from ethylene and polymerized units from at least one cycloolefin, (B) the mole ratio of the polymerized units from the cycloolefin to the polymerized units from ethylene is from 3:97 to 60:40, (C) the cycloolefin is incorporated in the polymer chain without ring opening, (D) the copolymer has an intrinsic viscosity of 0.01 to 20 dl/g, (E) the copolymer has a molecular weight distribution (Mw/Mn) of not more than 4, and (F) the copolymer has a crystallinity of 0 to 10%. The random copolymer may be grafted by (a) alpha, beta-unsaturated carboxylic acids and/or their derivatives, (b) styrenes, (c) organic silicon compounds having an olefinically unsaturated bond and a hydrolyzable group, or (d) unsaturated epoxy monomers.

Abstract: A reformed polypropylene resin composition having high degree of fluidity and excellent impact strength and rigidity, and further having a melt flow rate of from 50 to 150 g/10 min. and establishing a relationship between the melt flow rate (X) and the Izod impact strength (Y) which satisfies a relation Y.gtoreq.-4.7878 log X+13.8829. The reformed polypropylene resin composition is obtained by blending 0.01 to 0.2 parts by weight of an organic peroxide and 0.05 to 1 part by weight of a crosslinking agent per 100 parts by weight of a total of 50 to 90 parts by weight of a polypropylene having a melt flow rate at 230.degree. C. of 10 to 70 g/10 min, 0 to 25 parts by weight of an olefin copolymer rubber, and 5 to 40 parts by weight of an organic filler, and by melt-kneading the mixture by using a biaxial extruder maintaining a temperature of 120.degree. to 200.degree. in the preceding stage of the screw and a temperature of 180.degree. to 270.degree. C.

Abstract: A monocarbonate represented by the formula (R.sup.1).sub.n Ph--O(R.sup.2 O).sub.m --CO--O--CH.sub.2 --C(R.sup.3)(R.sup.4)(R.sup.5), a lubricating oil containing this monocarbonate, and a process for preparing a composition of this monocarbonate, a monocarbonate to which are bonded, via carbonic acid, two (R.sup.5)(R.sup.4)(R.sup.3)C--CH.sub.2 -- groups and a monocarbonate to which are bonded, via carbonic acid, two (R.sup.1).sub.n Ph--(OR.sup.2).sub.m -- groups. The monocarbonate exhibits excellent lubricating property, cleaning property and electrically insulating property, exhibits excellent compatibility with hydrogenated fluorocarbons such as R-134a, and can be favorably used as a lubricating oil for refrigerators such as electric refrigerators and air conditioners for room.

Abstract: A process for producing an automotive molded roof material is provided which comprises sheeting a foamable sheet forming composition comprising a specified propylene resin, a glass fiber, a radical initiator, a crosslinking auxiliary and a foaming agent in specific proportions into a foamable sheet, lining one side of the foamable sheet with a backing sheet so as to integrate these and irradiating the foamable sheet with ionizing radiation to thereby crosslink the propylene resin, followed by heating the foamable sheet so as to cause the foamable sheet to foam, placing a cover sheet on the other side of the foamed sheet before the sheet cools to solidify and press molding the cover sheet on the foamed sheet to cover. There is also provided an automotive molded roof material produced by the above process. An automotive molded roof material is obtained which can be recycled, is lightweight and has high rigidity.

Abstract: A random copolymer characterized in that (A) the copolymer comprises polymerized units from ethylene and polymerized units from at least one cycloolefin, (B) the mole ratio of the polymerized units from the cycloolefin to the polymerized units from ethylene is from 3:97 to 60:40, (C) the cycloolefin is incorporated in the polymer chain without ring opening, (D) the copolymer has an intrinsic viscosity of 0.01 to 20 dl/g, (E) the copolymer has a molecular weight distribution (Mw/Mn) of not more than 4, and (F) the copolymer has a crystallinity of 0 to 10%. The random copolymer may be grafted by (a) alpha, beta-unsaturated carboxylic acids and/or their derivatives, (b) styrenes, (c) organic silicon compounds having an olefinically unsaturated bond and a hydrolyzable group, or (d) unsaturated epoxy monomers.

Abstract: A prepolymerized solid catalyst for gaseous phase or slurry polymerization of alpha olefins is disclosed. The catalyst comprises a porous carrier having a particle size of 20 to 200 microns onto which has been deposited an aluminoxane and a transition metal compound having at least one cycloalkadienyl group, the transition metal being from group 4 of the Periodic Table. The transition metal is present in an amount of 0.003 to 3 mmol/gm of carrier, and the aluminum to transition metal atomic ratio is from 15 to 1000. This catalyst is then prepolymerized with 0.2 to 30 gm of an alpha olefin per gram of catalyst to form the final prepolymerized solid catalyst having an intrinsic viscosity of 0.2 to 20 dl/gm as measured in decalin at 135 deg C.

Abstract: A catalyst for polymerization of an olefin, said catalyst being formed from[A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients,[B] an organoaluminum compound catalyst component, and[C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by using the electron donor (1) together with the solid titanium catalyst component [A] and the organoaluminum compound catalyst component [B] has the following relation to the MFR (b) of homopolypropylene obtained by using the electron donor (2) under the same polymerization conditions as in the case of using the electron donor (1)log [MFR (b)/MFR (a)].gtoreq.1.5.This catalyst can give an olefin polymer having a broad molecular weight. Also provided is a process for polymerizing or copolymerizing an olefin in the presence of the above catalyst.

Abstract: A membrane apparatus includes a bubble supplying portion for supplying micro bubbles which is provided at a location in the vicinity of the entrance of a flow passage for raw liquid. Thus, the growth of a gel layer on a membrane surface can be prevented, and a large filtering amount can be maintained while preventing sludge from blocking the membrane. Moreover, since bubbles uniformly pass through the inter-membrane passages, sludge blocking can be evenly prevented over the entire surface of the membrane. When a flat membrane is used as the filtering membrane, there is provided an advantage of reducing the frequency of work for disassembling the frame and cleaning the membranes. A membrane treatment apparatus includes the membrane apparatus, an aeration apparatus, a circulating tank, and a filtrate pump.

Abstract: The refillable polyester bottle of the invention has a mean crystallinity of 32 to 70% at the bottle body, a methanol adsorption of 1,500 ppm or less at the same portion and a paraxylene adsorption of 300 ppm or less at the same portion. Therefore, the bottle is excellent in non-adsorptivity and heat resistance. According to the method of removing adsorbates on a polyester bottle of the invention, the adsorbates can be rapidly desorbed by holding the bottle in air of 40.degree. to 150.degree. C. or bringing the bottle into contact with water or water vapor heated at 40.degree. to 150.degree. C.

Abstract: There is provided a process for the production of a cycloolefin copolymer which comprises copolymerizing an .alpha.-olefin having 2 or more carbon atoms and a specific cycloolefin in the presence of a specific metallocene type catalyst in a solvent mixture of a hydrocarbon solvent having a solubility parameter (value of .delta.) of 7.7 [(cal/cm.sup.3).sup.1/2 ] or more and a hydrocarbon solvent having a solubility parameter (value of .delta.) of 7.5 [(cal/cm.sup.3).sup.1/2 ] or less as a polymerization solvent. A cycloolefin copolymer having a high molecular weight can be produced in a high concentration by this process at a high yield.

Abstract: Biaxially oriented films from high molecular weight polyethylene are characterized by a gas permeable structure formed from random-arranged microfibrils. The films have coefficients of static friction and kinetic friction of not more than 1.0. The biaxially oriented films are further characterized by service smoothness as well as tensile (tangent) modulus and tensile strength. The films may be used for lamination, filter, or for packaging for moisture absorbers. The biaxially oriented films may be obtained by extracting a hydrocarbon plasticizer from a sheet formed from the high molecular weight polyethylene and a hydrocarbon plasticizer, stretching the resulting sheet to obtain an oriented film having a specific surface area of at least 70 m.sup.2 /g and a fibril structure, and heating the oriented film under a standard length constraint to reduce the oriented film in specific area by at least 20 m.sup.2 /g.

Abstract: The polyamide resin composition of the present invention comprises 100 parts by weight of a polyamide resin and 5 to 200 parts by weight of a graft-modified ethylene/1-butene random copolymer having a graft quantity of an unsaturated carboxylic acid or its derivative of 0.01 to 10% by weight. The graft-modified ethylene/1-butene random copolymer is a graft-modified product of an ethylene/1-butene random copolymer having a 1-butene content of 15 to 25% by mol, an intrinsic viscosity [.eta.] of 0.5 to 3.5 dl/g, a glass transition temperature (Tg) of not higher than -60.degree. C., a crystallinity of less than 10%, and a parameter (B value) indicating randomness of a copolymerized monomer chain distribution, as measured by a .sup.13 C-NMR method, of 1.0 to 1.4. The polyamide resin composition shows high melt flowability, namely, good moldability, and it can provide a molded article excellent in flexibility, low-temperature impact resistance, resistance to water absorption and resistance to saline solutions.

Abstract: A process for producing an amorphous alloy ribbon by the single roll method is disclosed, which comprises injecting through a slot disposed at a nozzle tip a molten alloy having the composition represented by the general formula:(Fe.sub.1-a M.sub.a).sub.100-x-y-z-b Cu.sub.x Si.sub.y B.sub.z M'.sub.bwherein M is Co and/or Ni, M' is at least one element selected from the group consisting of Nb, Mo, W and Ta, and a, x, y, z and b satisfy the relationships: 0.ltoreq.a.ltoreq.0.1, 0.5.ltoreq.x.ltoreq.2 (atomic %), 5.ltoreq.y.ltoreq.20 (atomic %), 5.ltoreq.z.ltoreq.11 (atomic %), 14.ltoreq.y+z.ltoreq.25 (atomic %) and 2.ltoreq.b.ltoreq.5 (atomic %), provided that the ratio of y to z (y/z) is in the range of 0.5.ltoreq.y/z.ltoreq.3, onto a cooling wheel comprising a Cu alloy containing Be in an amount of 0.05 to 3.0% by weight. This process is advantageous in that the position of peel of the amorphous alloy ribbon formed on the cooling wheel can be controlled.

Abstract: A pellicle structure comprises a frame having a vertical through opening and a pellicle film spread on the upper the upper end of the opening of the frame. The pellicle film has a coating layer comprising a coating agent formed at least on the inner surface thereof, and a bonding portion for bonding the end edge of the frame to the peripheral edge of the pellicle film through an adhesive layer. The coating agent, in the bonding portion, is dissolved or dispersed in the adhesive so that the pellicle substrate is directly contacted by and bonded to the adhesive.