Abstract:
A foam made from a modified polypropylene resin comprising a graft copolymer prepared by copolymerizing a polypropylene resin with an aromatic vinyl monomer, wherein the average number of aromatic vinyl graft chains grafted per graft copolymer molecule is 1 or above and the weight-average molecular weight of the aromatic vinyl graft chain is 200 or above; and a process for the production thereof. This foam has a high closed-cell ratio and a high expansion ratio and is excellent in appearance.
Abstract:
A novel cell adhesion protein having the effect of suppressing various immunological reactions and its analogs; a process for producing the same; an immunosuppressive agent containing the same; and another immunosuppressive agent containing as the active ingredient immunosuppressive cells obtained by incubating human cells in the presence of the cell adhesion protein. These immunosuppressive agents have potent immunosuppressive effects with little side effects.
Abstract:
An adsorbent capable of efficiently removing tumor necrosis factor alpha (TNF- alpha ) present in a body fluid and comprising a compound having a functional group represented by general formula (I) and immobilized on a water-insoluble carrier (wherein X represents an anionic functional group; A represents a substituent other than the anionic functional group; and n represents an integer of 0 to 4, provided when n is 2 or above, nA's may be the same or different from each other); a method of removing TNF- alpha by adsorption comprising bringing the adsorbent into contact with a body fluid; and a device for adsorbing TNF- alpha by the adsorbent packed in a vessel equipped with an inlet and an outlet for a body fluid and provided with means for preventing the adsorbent from flowing out of the vessel.
Abstract:
A process for producing D-N-carbamoyl- alpha -amino acid from a 5-substituted hydantoin with the use of a hydantoinase produced by a microorganism transformed with a recombinant DNA with a vector DNA and the fragments of a DNA containing genes associated with a hydantoinase originating in a specified microorganism belonging to the genus Bacillus, Agrobacterium or Pseudomonas.
Abstract:
A hydrosilylation method for introducing a hydrosilyl group into an olefin molecule by an addition reaction using a metal catalyst in the presence of a compound selected from among thiazoles and phosphines added to control the reaction, and a process for producing a hydrosilylated organic curing agent according to the above method. This method facilitates the control of the hydrosilylation reaction and the production of an organic-modified silicon compound having two or more hydrosilyl groups in its molecule. As a concomitant effect, the storage stability of the formed curing agent when both the catalyst and the additives of the invention remain therein is improved as compared with the case where only the catalyst remains therein.
Abstract:
A heat-resistant thermoplastic resin composition comprising 5-95 parts by weight of a polyamide resin (A), 5-95 parts by weight of an unsaturated carboxylic acid copolymer (B) comprising 40-80 wt.% of an aromatic vinyl compound, 15-50 wt.% of a vinyl cyanide compound, 0.1-20 wt.% of an unsaturated carboxylic acid compound and 0-30 wt.% of other copolymerizable vinyl compound, and 5-50 parts by weight of a graft copolymer (C) prepared by grafting 60-5 wt.% of a vinyl compound onto 40-95 wt.% of a diene rubber having an average particle diameter of 0.1-2.0 mu m, which composition further contains kaolin (D) in an amount of 0.1-30 parts by weight per 100 parts by weight in total of the components (A), (B) and (C). The composition provides moldings excellent in thermal deformation and impact resistances and appearance, and has a good flowability in molding.
Abstract:
Prefoamed polypropylene resin particles with a lowered peak temperature in melting so as to lower the heating temperature of a final foam in expansion molding. The particle comprises a polypropylene resin and a beta crystal nucleator, the content of the DOLLAR (g)b crystals in the crystalline region as a whole being adjusted to 5-100 parts by weight.
Abstract:
A method of manufacturing olefin resin particles, comprising the steps of extruding by using a homodirectional biaxal kneading extruder a resin from a die nozzle having a discharge rate per hole of 0.5-8 kg/hr and a diameter of less than 2 mm into warm water of 5-90 DEG C which is lower than the temperature of the resin by 140-220 DEG C, and then cutting the extruded product with a cutter blade in the warm water. The mixed materials are dispersed uniformly, and the changing of a raw resin is carried out speedily and economically, resin particles of a desired shape being obtained.
Abstract:
An advantageous process for producing an unsaturated telechelic isobutylene polymer wherein the formed polymer is isolated in a nonaqueous system to prevent the occurrence of an effluent containing the solvent dissolved therein. The process comprises: a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the general formula (I): MXn (wherein M represents a metal atom; n represents an integer of 2 to 6; and Xs represent each independently halogen or a monovalent hydrocarbon group), characterized by conducting catalyst ligand exchange after the polymerization and removing the component containing the atom M of the above formula (I); a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the above formula (I), characterized by forming a telechelic isobutylene polymer and removing the catalyst by using an adsorbent capable of adsorbing acids; and a method of isolating an isobutylene polymer in a nonaqueous cationic polymerization reaction using a catalyst represented by the above formula (I), characterized by adding a compound represented by the following general formula (II): Q(OR)m, (wherein Q represents a group Ia, IIa, IIIb or IVa metal atom of the Periodic Table; m represents an integer of 1 to 6; and R represents hydrogen or a monovalent organic group, provided when m is 2 or more, mR's may be the same or different from each other) after the polymerization to eliminate the HC1 molecule from the polymer chain end and conduct catalyst ligand exchange to thereby form an unsaturated telechelic isobutylene polymer, and removing the component containing the atom M of the above formula (I).
Abstract:
A substance for detecting amyloid deposition and/or deposition site with excellent utility and safety, which is prepared by combining an amyloid-forming protein with a metal chelating substance. It is possible to obtain clear images of amyloid deposition and/or deposition site safely in a short time by labeling the invention substance with a radio-isotope via the metal chelating substance.