Abstract: This invention relates to operator DNA specific for the repressor of .phi.105 and to the use thereof. The sequence of the operator DNA is 5'-GACGGAAATACAAG-3', 5', GTCGGAAATACAAT-3', 5'-GACGAAATTCAAG-3' or 5'-GTCGTGAATACCAT-3.

Abstract: Nucleic acid molecules are provided which encode antigenic proteins capable of inducing in a chicken an immune response conferring protection against Eimeria tenella. Expression vectors containing the nucleic acid molecules are also provided. Methods for producing the proteins or antigenic polypeptides having amino acid sequences included within these proteins are also provided.

Abstract: Moulding compositions comprising a polyolefin, cellulose fibres and an unsaturated organosilane exhibiting a tensile elasticity modulus (E), measured at 100.degree. C., higher than 1250 MPa and a ratio G'/G" of their modulus G', representing their elastic response, to their loss modulus G", measured at 200.degree. C. and at a frequency of 0.1 rad/s (0.1 s.sup.-1), with a value of at least 0.80.

Abstract: Laminated composite consisting of a substrate sheet coated with a film (A) comprising at least one layer based on a polyamide resulting from the polycondensation of an aliphatic .alpha., .omega.-dicarboxylic acid with xylylenediamines.

Abstract: Process for the production of salt in which sodium chloride is crystallized in the form of spheres by evaporation of a sodium chloride brine and the spheres obtained are then broken up. The salt produced by the process is particularly suitable for the food industry.

Abstract: The invention relates to a process for the production of chloroform from carbon tetrachloride using a catalytic composition comprising a support on which a hydrogenating metal is deposited, the support comprising an alkali metal aluminate or alkaline earth metal aluminate.The invention also relates to a catalytic composition comprising a support on which platinum is deposited, the support comprising an aluminate having an inverse spinel structure.

Abstract: Polymerization of vinylidene fluoride in an aqueous suspending medium with the involvement of an oil-soluble radical polymerization initiator and in the presence of a suspending agent consisting of a methyl hydroxyethyl cellulose. The use of methyl hydroxyethyl cellulose ensures a substantial reduction in the formation of buildup on the walls of the reactors when compared with other cellulosic suspending agents such as methyl and methyl hydroxypropyl cellulose, which are usually recommended for the polymerization of vinylidene fluoride in an aqueous suspending medium.

Abstract: Electrolyzer comprising at least two elementary electrolysis cells (1), coupled in electrical series along a common vertical wall (6) which comprises two vertical metal plates (10, 11), arranged on either side of a peripheral frame (12) so as to define a vertical chamber (16). One of the plates (10) carries an anode (13) of one of the cells and the other plate (11) carries a cathode (14) of the other cell. The chamber (16) contains a metal mass whose melting temperature is lower than the temperature prevailing in the said chamber when the electrolyzer is in operation. The electrolyzer is suitable for the electrolytic production of sodium chlorate.

Abstract: Frame unit for an electrolyser of the filter-press type, comprising a vertical metal sheeting (1), a peripheral frame made up of two vertical uprights (2, 3) and of two horizontal lengthwise members (4, 5) and a metal sheet (6) covering the sheeting (1) and the two uprights (2, 3), the two lengthwise members (4, 5) being made of the same material as the sheet (6), being inserted between the uprights (2, 3) and being firmly attached to the sheet (6). Electrolysers of the filter-press type comprising this frame unit.

Abstract: The present invention relates to a process for the pretreatment of activated carbon, capable of being employed especially for the purification of concentrated solutions of hydrochloric acid.

Abstract: Compatibilized compositions comprising at least one polyamide and at least propylene polymer which is at least partially modified by a polar monomer, in which compositions the propylene polymer has a melt flow index (MFI) measured according to ASTM standard D 1238-86 (230/2.16 conditions) higher than 50 g/10 min.

Abstract: Process for removing an industrial residue containing sodium sulphate, in which the sodium sulphate in the residue 7 is treated with a calcium salt 12 to precipitate calcium sulphate 13, which is sent to a rock salt deposit 15, from which an aqueous solution of sodium chloride 16 is withdrawn.The process applies to the residues from the desulphurization of fumes by means of sodium bicarbonate.

Abstract: Baths for the chemical polishing of stainless steel surfaces containing, in aqueous solution, a mixture of hydrochloric acid, phosphoric acid, nitric acid and of sulphosal cylic acid and at least one abietic compound.

Abstract: Substituted thiophenes of the general formula: ##STR1## in which: R represents a hydrogen atom, a halogen atom or an aliphatic group containing from 1 to 4 carbon atoms,X represents a hydrogen atom or a fluorine atom,Y represents an at least partially fluorinated aliphatic or aromatic group,m represents an integer equal to or greater than 2, andn represents an integer such that 0.ltoreq.n.ltoreq.7.The invention also relates to the electrically conducting polymers containing recurring units derived from monomers chosen from the substituted thiophenes.

Abstract: Frame unit for an electrolyser of the filter-press type, comprising a vertical frame (1) defining an electrolysis chamber (13), an electrode in the electrolysis chamber, comprising a pair of vertical metal sheets (6) arranged facing each other, horizontal or oblique metal rails (7) arranged between the sheets (6), and U-shaped or V-shaped vertical metal beams (8) inserted between the rails and the sheets, the beams (8) being arranged in pairs, symmetrically on either side of the rails (7), and being connected to each other by vertical plates (11) which join the rails (7) so as to form vertical ducts (12) in the chamber 13.

Abstract: A mixture is produced, comprising from 50 to 95% by weight of at least one vinyl chloride-based resin, from 1 to 20% by weight of at least one olefin-based resin, from 1 to 20% by weight of a copolymer of ethylene and vinyl acetate which has a vinyl acetate content of between 10 and 35% and from 2 to 40% by weight of a copolymer of ethylene and vinyl acetate which has a vinyl acetate content of between 60 and 95%, and the product thus obtained is then processed.The process makes it possible in particular to produce sheets which have good mechanical properties and which have a remarkable transparency.

Abstract: The winder comprises a central driving carrier tube (1) and winding drums (2) equipped with self-blocking systems (3) for receiving reeling mandrils (4) arranged successively round the central driving carrier tube, the said drums (2) each being connected to this tube by means of a magnetic coupling (16), (17), (18) located inside the said tube (1) and connected, on the one hand, rigidly to this tube (1) and, on the other hand, to the drum (2), in said winder the connection between the magnetic coupling (16), (17), (18) and the drum (2) being made via a speed multiplier (6), (6'), (6"), (13) likewise arranged in the central driving carrier tube (1). The winder allows a reeling of a series of widths cut from the web material, this being carried out with controlled winding tensions.

Abstract: The invention relates to a solution for dialysis containing a derivative of 3-hydroxybutanoic acid chosen from oligomers of this acid and esters of this acid or of these oligomers with 1,3-butanediol.

Abstract: Process for the preparation of .beta.-hydroxybutyric acid esters, comprising:1) a step involving alcoholysis of the polyhydroxybutyrate in the presence of an alcohol, a halogenated solvent, and an acid,2) a neutralization step comprising the addition of an alcoholate in solution in the alcohol,3) a purification step comprising the addition of a halogenated solvent and the azeotropic removal of water and the alcohol,4) a step for recovery of the ester, comprising a filtration, a distillation of the halogenated solvent and a distillation of the ester.This process enables .beta.-hydroxybutyric acid esters of high purity to be obtained.

Abstract: Baths for chemical polishing of copper or copper alloy surfaces, comprising, in aqueous solution, hydrogen peroxide, phosphoric acid and tetraborate ions.