Abstract: Organopolysiloxane copolymers comprising units of the general formulae (CH.sub.3).sub.2 RSiO.sub.0.5 and ##EQU1## and SiO.sub.2, wherein R represents an alkyl group with 1 to 3 carbon atoms or a vinyl group, R' represents a divalent hydrocarbon radical with 1 to 10 carbon atoms, Q represents an organic radical of the formulae --OG, ##EQU2## or --OSiR.sub.3 in which G represents an alkyl radical with 1 to 4 carbon atoms, and each R group, which may be identical or different, is as defined above, n represents 2, 3 or 4, the C.sub.n H.sub.2n group being straight or branched and y represents a number from 4 to 60; the C.sub.n H.sub.2n groups being the same or different, the ratio of the number of (CH.sub.3).sub.2 RSiO.sub.0.5 units to the number of SiO.sub.2 units being 0.55:1 to 0.75:1 and the ratio of the number of ##EQU3## units to the number of SiO.sub.2 units being 0.005:1 to 0.1:1 are used as stabilizers in the preparation of open-cell polyvinyl chloride foams.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200.degree. to 300.degree.C, which resins comprise three-dimensional recurring units of the general formula: ##EQU1## in which, in any particular recurring unit: A IS ZERO OR AN INTEGER FROM 1 TO 5; ##EQU2## denotes a radical of the general formula ##EQU3## in which Y represents H, CH.sub.3 or Cl; G denotes a monovalent aromatic radical; andA denotes a divalent organic radical possessing at least two carbon atoms,Such that there are on average, at least 4.4 and at most about 20>D.sub.1 < radicals per ##EQU4## radical, and optionally, units and/or molecules of the general formula ##EQU5## IN WHICH: T denotes a monovalent organic radical;T.sub.1 denotes a radical of the general formula: ##EQU6## or a radical of the general formula: ##EQU7## b is zero or an integer from 1 to 4; and A, D.sub.

Abstract: A process is provided for the semihydrogenation of the olefinic group in conjugated position to a carbonyl group in citral and homologous dienic aldehydes. The dienic aldehyde is hydrogenated catalytically using a palladium catalyst, and in solution in a lower aliphatic alcohol in the presence of an alkali or alkaline earth metal borate. The process is of particular application to the semihydrogenation of citral to citronellal.

Abstract: New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200 to 300.degree.C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50.degree.C and 350.degree.C, a bis-imide of the general formula: ##EQU1## in which Y denotes H, CH.sub.3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:R (NH.sub.2).sub.xIn which x represents an integer at least equal to 2 and R denotes an organic radical of valency x, and an alazine of the general formula:G --CH = N --N = CH --Gin which G represents a monovalent aromatic radical, and an unsaturated polyester and/or a polymerizable monomer other than a bis-imide, containing at least one polymerizable vinyl, maleic, allyl or acrylic--CH=C<group in amounts such that if N.sub.1 represents the number of mols of bis-imide employed, N.sub.

Abstract: Antibiotics 20,798 RP and 27,706 RP of the general formula: ##SPC1##(wherein R represents a hydrogen atom or a hydroxy group) or acid addition salts thereof are prepared by reduction of a corresponding compound wherein the --CHOH--CH.sub.2 --R group is replaced by ##EQU1## The antibiotics of general formula I have valuable anti-tumour properties; that wherein R is hydroxy (27,706 RP) is new.

Abstract: Acetophenone is made by decomposing cumene hydroperoxide in a mixture of water, a copper catalyst, and .alpha.-methylstyrene or dimethylphenylcarbinol.

Abstract: The new antibiotic designated 19,402 R.P. - an acid - is obtained by the cultivation of the microorganism " Streptomyces 6227" or "Streptomyces peruviensis" NRRL 2757, the characteristics of which are described in British Patent No. 846,801. The antibiotic and its alkali metal salts are particularly active against gram-positive microorganisms.

Abstract: New compounds of the formula: ##SPC1##Wherein A is a phenyl, pyridyl, pyridazinyl, 2-, 3- or 4-quinolyl or naphthyridinyl radical, or a said radical substituted by one or two atoms or radicals selected from halogen, alkyl, alkoxy cyano and nitro, R is alkyl, alkenyl or hydroxyalkyl, and n is zero or 1, possess pharmacological properties and are, in particular, active as tranquilizers, anti-convulsant agents, decontracturants and agents to produce hypnosis.

Abstract: Multicellular polymers having excellent chemical inertness and heat resistance are produced by heating at a temperature from 100.degree. to 300.degree.C, maleic anhydride and a polyaldimine of the general formulaA (N = CH -- G).sub.n (I)in which G represents a monovalent organic radical which contains less than 35 carbon atoms and at least one aromatic or heterocyclic ring in the .alpha.-position to the imine group in formula (I), A represents an organic radical of valency n which contains less than 50 carbon atoms and at least one aromatic or heterocyclic ring in the .alpha.-position to the imine group in formula (I), and n represents a number at least equal to 2.

Abstract: Naphthacene derivatives of the formula: ##SPC1##Wherein each of R.sub.1 and R.sub.2 represents an oxygen atom or a group of the formula ##EQU1## and R.sub.3 represents hydrogen, or an alkyl, alkanoyl, thioalkanoyl, aryl, aroyl, carbamoyl, thiocarbamoyl, methylthiocarbamoyl or amidino group, these groups being optionally substituted, and R.sub.4 represents hydrogen, or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are attached represent piperazin-1-yl which carries on the second nitrogen atom an optionally substituted alkyl group, particularly 4-methoxy-5,12-dioxo-6,9,11-trihydroxy-7-(2,3,6-O-tridesoxy-3-amino-1-L-ly xohexosyl)-9-(1-formylhydrazono-ethyl)-5,7,8,9,10,12-hexahydro-naphthacene, and non-toxic salts thereof, possess anti-tumour properties.

Abstract: Electrical and electronic devices are coated with an organopolysiloxane composition which consists essentially of a mixture of the following ingredients by weight:I 100 parts of a .alpha.,.omega.-dihydroxydiorganopolysiloxane polymer, of viscosity at least about 600 cPo at 25.degree.C,ii 1 to 15 parts of an organosilicon compound which is eitherA a monomer of the formula (A): R.sub.x Si[(OCH.sub.2 CH.sub.2).sub.a OR'].sub.4.sub.-x', orB a polymer resulting from the partial hydrolysis of at least one monomer of formula Si(OR').sub.4 ;iii 0.2 to 6 parts of an organic derivative of titanium, which is either:A a monomer of the formula (B): Ti[OCH.sub.2 CH.sub.2).sub.b OR"].sub.4',b a polymer resulting from the partial hydrolysis of at least one monomer of the formula Ti(OR").sub.

Abstract: Hollow fiber fluid fractionating apparatus in which the hollow fibers are twisted together to form cords which are assembled in a bundle in a fluid fractioning apparatus. The twists in the hollow fibers tend to break up boundary layers around the hollow fibers and improve the fractionating.

Abstract: A continuous process for the preparation of an N-substituted maleimide is provided which comprisesA. reacting, in a first vessel, maleic anhydride and a primary amine in a solvent for the anhydride and amine, under a pressure from 1 to 5 bars and at a temperature from 40.degree. to 130.degree. C,b. circulating the mixture thus produced through a closed circuit equipped with a condenser, while introuding a dehydrating agent, a tertiary amine and a catalyst into said circuit,C. continuously removing part of the reaction mixture which is circulating in the circuit, andD. isolating the maleimide from the mixture thus removed. This process eliminates many of the problems of earlier processes while providing good yields quickly.

Abstract: Phenthiazine derivatives of the formula: ##SPC1##Wherein R represents an alkyl, alkenyl or alkynyl group containing 7-17 carbon atoms, are very active as long acting neuroleptics anti-emetics and tranquilisers.

Abstract: Fluid fractionating apparatus and a unit for use therein, the unit being positionable in a jacket having at least one fluid inlet and at least one fluid outlet, the unit including at least one leakproof band wound up in the form of a spiral cylinder, the turns of which are radially spaced from one another. A multiplicity of hollow fibres are wound around the turns of the spiral cylinder and extend therebetween. Two end walls extend perpendicular to the axis of the spiral cylinder, and may be formed of a solidified glue, the walls being located one at each end of the cylinder and firmly fixed to the leakproof band of the hollow fibres, at least some of the fibres crossing right through at least one of the end walls and opening on the side thereof outside the spiral cylinder. An opening, which may be provided with a hollow mandrel extending into the interior of the innermost turn of the spiral, is used for feeding the fluid thereto or removing it therefrom.

Abstract: Naphthacene derivatives of the formula: ##SPC1##Wherein each of R.sub.1 and R.sub.2 represents an oxygen atom or a group of the formula ##EQU1## and R.sub.3 represents hydrogen, or an alkyl, alkanoyl, thioalkanoyl, aryl, aroyl, carbamoyl, thiocarbamoyl, methylthiocarbamoyl or amidino group, these groups being optionally substituted, and R.sub.4 represents hydrogen, or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are attached represent piperazin-1-yl which carries on the second nitrogen atom an optionally substituted alkyl group, and non-toxic salts thereof, possess anti-tumor properties.

Abstract: Thermosetting polymers, both prepolymers and cured resins, are produced by reacting ammonia with a polyimide of the formula: ##EQU1## IN WHICH A IS A NUMBER FROM 2 TO 4, Y represents an organic radical of valency a, and A and T, which may be identical or different, each represent hydrogen, chlorine or methyl, the proportions of polyimide and ammonia being such that there are at least 2 imide groups per mol of ammonia. These polymers find utility in the production of materials liable to undergo severe heat stresses.

Abstract: In the nitration of phenol with nitric acid, decantation of the residual acid, and steam distillation of ortho-nitrophenol to leave an aqueous distillation residue of para-nitrophenol, a cleaner purer crystalline para-nitrophenol product is obtained by cooling the hot distillation residue when it contains at least 0.5% of sodium bisulphite and is at pH 5.4 to 6.4.

Abstract: An implantable vesical prosthesis for a bladder which includes a sterile pouch formed from flexible plastics material compatible with the organs surrounding the natural bladder of a patient, at least a portion of the pouch being deformable during the introduction and discharge of urine between two extreme positions, one corresponding to the full pouch and one to the empty pouch. Two inlet pipes open into the interior of the pouch and are connectable to two ureters of a patient and an outlet pipe is connectable to the urethra. The prosthesis is completely void of any internal artificial valves or flaps.

Abstract: Fluid fractionating apparatus comprising a jacket, two side plates forming with said jacket a closed chamber, at least one aperture formed in each side plate, a cap located at least partly in each aperture, each cap having a cavity communicating with the interior of the chamber and an orifice communicating via its aperture with the exterior of the chamber, a plurality of cylindrical elements extending substantially axially in said chamber and each comprising a textile sheath forming at least one channel, and a membrane covering the textile sheath and being joined thereto at each of its ends in a leakproof manner, the cylindrical elements having an external diameter of between 1 and 10 mm, the two ends of the cylindrical elements each being located in a fluidtight manner in the cavity of one of said caps, and means for feeding a fluid to and from the chamber. The cylindrical elements are grouped in bundles, the ends of the elements of a bundle being located in the cavity of a single cap.