Abstract: In order to grow a GaAs.sub.1-x P.sub.x fixed-composition layer of excellent quality, which has a predetermined composition x, over a GaAs or GaP single crystal substrate, a varied-composition layer is formed between the substrate and the fixed-composition layer. The varied-composition layer comprises at least two varied-composition layer portions and at least one fixed-composition layer portion with a predetermined thickness that is formed between the varied-composition layer portions, whereby dislocations caused by lattice mismatch with the GaP substrate are settled in the varied-composition layer portions and recovered in the fixed-composition layer portion between the varied-composition layer portions, thereby minimizing the dislocations, and thus making it possible to obtain a GaAs.sub.1-x P.sub.x layer of excellent crystal quality, which has a predetermined composition x.

Abstract: Disclosed is a resin composition comprised of (a) 5 to 95 weight % of a saponified ethylene/vinyl acetate copolymer, (b) 95 to 5 weight % of a polyamide resin in which the content (in .mu.-equivalent/g of the polymer) of the terminal amino group in the molecule is larger than the content (in .mu.-equivalent/g of the polymer) of the terminal carboxyl group in the molecule, and (c) 0.5 to 10 weight % of a modified polyolefin formed by grafting an unsaturated carboxylic acid, or an acid anhydride or salt thereof onto a polyolefin. The resin composition can be stably shaped for a long time by extrusion.

Abstract: A system for setting an analysis condition for a thermal analysis of a fluid inside an apparatus, wherein a gas flow-in temperature in the apparatus, a gas flow-in rate, and an apparatus outer wall temperature are set as critical conditions, the interior of the apparatus being under a high pressure atmosphere and heated by a heater, an analysis mesh shape, a pressure inside the apparatus and other values, and a heater power, are set as initial values, and a simulation is carried out so that an optimum operating condition is obtained, wherein the relationship between heater power by which a heater monitoring temperature is maintained at a constant value and a gas flow rate at the entrance while changing the apparatus internal pressure is obtained by a trial experiment, and the simulation is carried out by changing the gas flow rate at the entrance in accordance with the heater power and the gas flow rate at the entrance set as the initial value.

Abstract: A heat resistant polyamide film which is obtained by melt-extruding into a sheet a polyamide composition of a mixture of a preformed polyamide (A) composed of diaminobutane and adipic acid and a semi-aromatic polyamide (B) composed of a polyamide containing an aromatic dicarboxylic acid and an aliphatic diamine in an amount of at least 80% by weight of the polyamide-constituting components, in a weight ratio of (A):(B)=99.9:0.1 to 30:70, quenching the sheet, then biaxially stretching it at least 2.0.times.2.0 times, followed by heat setting at a temperature of at least 205.degree. C., and which has a heat distortion initiation temperature of at least 130.degree. C.

Abstract: There are provided two types of moistureproof films of a laminated structure. The first type of moistureproof film comprises a core layer (A) and a protective layer (B) joined to one side of the core layer, wherein: (a) the core layer (A) is composed of a transparent film of a polyvinyl alcohol having a degree of saponification of 99 mol % or higher, the film having a silicon oxide thin film formed on at least one side thereof; and (b) the protective layer (B) is composed of a transparent film including at least one layer of a transparent plastic film having a transparent silicon oxide thin film formed on at least one side thereof.

Abstract: A molded amide resin product prepared by injecting a mixture comprising a .omega.-lactam, a polymerization catalyst, a polymerization cocatalyst, a modified olefin and a polyamide soluble in a molten .omega.-lactam into a mold at a temperature not lower than the melting point of the .omega.-lactam, followed by molding.

Abstract: A method for preventing the bulking of activated sludge, which comprises adding to the activated sludge a water-soluble cationic polymer obtained by a reaction of a dialkylamine, ammonia and epichlorohydrin, in an amount of from 0.05 to 25 parts by weight relative to 100 parts by weight of the dried solid content of the activated sludge.

Abstract: A method for preventing the bulking of activated sludge, which comprises adding to the activated sludge a water-soluble cationic polymer obtained by a reaction of a dialkylamine with epichlorohydrin, in an amount of from 0.1 to 25 parts by weight relative to 100 parts by weight of the dried solid content of the activated sludge.