Abstract: Disclosed herein is an immunoregulator comprising a derivative of estradiol represented by the formula (I), which immunoregulator has a small influence to the non-specific immunoreactions in general and gives a specific influence to the immunoreactions against an isoantibody.

Abstract: Disclosed herein is a coextruded, biaxially stretched and laminated heat-shrinkable tubular film, comprising:a gas-barrier layer of a copolymer of vinylidene chloride having a thickness, which is not more than 30% of the total thickness of the coextruded, biaxially stretched and laminated heat-shrinkable tubular film, of not less than 6 .mu.m, outer layers of a polyolefin, at least one intermediate layer of a polyamide or a thermoplastic polyester, both of which show a crystal melting point of not more than 240.degree. C.

Abstract: Disclosed is a pharmaceutical composition containing an aminobenzoic acid derivative as an active ingredient represented by the following general formula: ##STR1## wherein .sup.1 R donotes one member selected from the group consisting of the residual groups formed by removing OH at 1(alpha) or 1(beta) position from arabinose, glucose, galactose and mannose, or a pharmaceutically acceptable salt thereof.

Abstract: Disclosed in the present invention is a process for producing 2,6-naphthalenedicarboxylic acid comprising oxidizing 2,6-diisopropylnaphthalene or its partially oxidized intermediate with molecular oxygen in a solvent containing at least 50% by weight of an aliphatic monocarboxylic acid, having not more than three carbon atoms, in the presence of a catalyst composed of (i) a heavy metal comprising cobalt and/or manganese and (ii) bromine, and a salt of an inorganic acid having an acid dissociation constant Ka smaller than 1.34.times.10.sup.-5 (at 25.degree. C.) and a vapor pressure lower than that of the aliphatic monocarboxylic acid used as the solvent. According to the process of this invention, 2,6-naphthalenedicarboxylic acid of high bulk density can be obtained in a high yield and with high purity.

Abstract: The present invention discloses a polyarylene thioether of high crystallizing rate having a necessary time for 50% crystallization of not more than 50 seconds upon crystallization of a molten polymer at 250.degree. C. as well as a production process therefor.

Abstract: Disclosed herein is a method for inhibiting the formation of urinary calculus by the administration of 24,25-dihydroxycholecarciferol.

Abstract: Disclosed herein are a derivative of azole having a usefulness in controlling plant fungal diseases, in regulating plant growth and in killing weeds, a process for producing the derivative of azole and a composition having a fungicidal activity, a plant growth regulating activity and a herbicidal activity and containing the derivative of azole as an active ingredient for use in agriculture and horticulture.

Abstract: A process for forming a polyarylenethioether stretched blow molded vessel, by a modified blow molding of a substantially linear polyarylenethioether having a melt viscosity of 3,000 to 20,000 poise [at 310.degree. C., shear rate=200 sec.sup.-1 ]. The modified blow molding involves injecting the polymer in a mold to form a bottomed parison, stretching the bottomed parison along its axis by means of a rod or mandrel, and the stretched bottomed parison is then subjected to blow molding to effect lateral stretching. The blow parison is then heat set.

Abstract: Disclosed herein is a process for producing pitch-based carbon fibers having the specific properties comparable to those of polyacrylonitrile(PAN)-based carbon fibers, wherein an optically isotropic pitch obtained by polymerizing naphthalene at a temperature of not more than 330.degree. C. and heating the thus obtained polymeric material at a temperature of 330.degree. to 440.degree. C. while introducing an inert gas thereinto to remove volatile components therefrom, is subjected to melt-spinning, infusibilization (therosetting) and carbonization and the thus obtained carbonized-fibers are subjected to heat treatment at a temperature of not less that 900.degree. C. to obtain the carbon fibers.

Abstract: Disclosed herein is a composition of polyarylene thioether prepared by combining 0.001 to 10 parts by weight of kaoline of the mean particle diameter of 0.03 to 2 .mu.m with 100 parts by weight of polyarylene thioether having the repeating unit of ##STR1## as the main constituent. The composition of polyarylene thioether has a high crystallization rate and forms a minute spherulite structure. Moreover, the composition having a short molding cycle at the time of melt molding, generates a small amount of the flash and gives the molded products excellent in mechanical properties.Disclosed herein also is a composition prepared by further combining an inorganic filler and/or a fibrous filler with the above-mentioned composition of polyarylene thioether.

Abstract: Disclosed herein is a smokable food-packaging film comprising:at least one layer of a mixture of 50 to 80 wt % polyamide having a melting point of 120.degree. to 210.degree. C. and a recrystallization temperature of not lower than 50.degree. C. and 20 to 50 wt % .alpha.-olefin - vinyl alcohol copolymer, said film having properties of an initial stress of not higher than 0.6 Kg/mm.sup.2 at a 25% elongation, a transmission to 50% concentration of methanol of not less than 200 g/m.sup.2.day.atm at a temperature of 60.degree. C. and a relative humidity of 0%, and an oxygen gas-transmission of not more than 50 cc/m.sup.2.day.atm at a temperature of 30.degree. C. and a relative humidity of 60%, and the thickness of said film being 20 to 60 .mu.m.

Abstract: A polymer pyroelectric infrared sensor having an improved sensitivity and an improved heat resistance is formed by disposing a pyroelectric film having electrodes for taking out a pyroelectric output on both sides so as to face a window for introducing infrared rays. The pyroelectric film comprises a pyroelectric film of vinylidene fluoride copolymer having a crystallinity of 60% or more and a relative dielectric constant of 10 or below at 25.degree. C. and in a low frequency region of 0.1-10 Hz.

Abstract: Disclosed herein is a method for producing .alpha.-form gypsum hemihydrate, comprising heating an aqueous slurry containing gypsum dihydrate and a salt of sulfosuccinic acid as the catalyst for crystallization, thereby converting gypsum dihydrate into .alpha.-form gypsum hemihydrate.

Abstract: Disclosed herein are dialkanoyloxybenzylidene dialkanoate represented by the formula ##STR1## wherein X.sup.1 and X.sup.2 represent respectively alkanoyloxy group and a pharmaceutical composition in dosage unit form which comprises a dosage effective for the treatment of inflammatory disease of the dialkanoyloxybenzylidene dialkanoate as an active ingredient thereof.

Abstract: Disclosed herein is a process for producing biaxially stretched polyparaphenylene sulfide film including the steps of melt-molding a polyparaphenylene sulfide resin into a sheet-form or film-form, rapidly chilling the thus molded sheet or film thereby obtaining an amorphous and non-stretched sheet or film, subjecting the amorphous and non-stretched sheet or film to thermal treatment for from 0.5 to 20 sec at a temperature of from 150.degree. to 300.degree. C., cooling the thus treated film or sheet to room temperature and subjecting the thus cooled film or sheet to biaxial stretching at a temperature of from 80.degree. to 120.degree. C.

Abstract: Disclosed herein is a polyarylene thioether composition comprising: 100 parts by weight of a polyarylene thioether (A) which contains not less than 70 wt % of a repeating unit of ##STR1## and 0.01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR2## as the main constituent and has a melting point of not lower than 290.degree. C. or a melt crystallization temperature of not lower than 220.degree. C. This composition may further comprise 0.1 to 300 parts by weight of an inorganic filler and/or a fibrous filler. A 50% crystallization time, t.sub.1/2, at 250.degree. C. of the polyarylene thioether composition is not more than 1/1.5 of the 50% crystallization time of a polyarylene thioether which does not contain the polyarylene thioether (B) Accordingly, its melt molding cycle is short and its molded product has a high strength.

Abstract: A string for a musical instrument consisting of a monofilament made of a resin of vinylidene fluoride and having the following characteristics which give good clearness of sound, good sharpness of sound and good spread of sound:(1) the diameter of the monolfilament is in the range of 0.4 to 1.5 mm .phi.;(2) the unevenness of the diameter of the monofilament is less than 5% per meter of the monofilament length;(3) the circularity of the section of the monofilament is more than 95%;(4) the specific gravity is more than 1.6;(5) the inherent viscosity is in the range of 1.1 to 1.6 dl/g;(6) the apparent viscosity with the shear rate of 1/100 at 260.degree. C. is in the range of 8000 to 20000 poises;(7) the index of double refraction is in the range of 30.times.10.sup.-3 to 40.times.10.sup.-3 ;(8) the tensile strength is more than 50 kg/mm.sup.

Abstract: A resin-made heat-resistant optical fiber is formed of a core of a hardened thermosetting resin and a cladding of a polymer or copolymer having a refractive index smaller by at least 1%, preferably, at least 3% than that of the core. The thermosetting resin is selected from the group consisting of epoxy resins, phenol resins and urethane resins. The polymer or copolymer may preferably be a thermoplastic organic resin.

Abstract: Activated carbon, useful in a pharmaceutical composition for adsorbing exogenous or endogenous toxins from the gastrointestinal tract of a patient can be prepared by a process including a step of treating activated carbon with an aqueous ammonia solution to provide a resultant activated carbon having a pH of 6 to 8.

Abstract: A compound of 1,5-disubstituted .Iadd.-1H-.Iaddend.1,2,4-triazole-3-carboxamide represented by the general formula; ##STR1## wherein R.sup.1 is alkyl of one to three carbon atoms, chloro, fluoro, iodo, trifluoromethyl or nitro, R.sup.2 is hydrogen, methyl or chloro, R.sup.3 is hydrogen or methyl is provided in the invention, which shows an excellent herbicidal activity.